mirror of
https://github.com/cnlohr/lolra.git
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Update calculator to handle goertzel
This commit is contained in:
cnlohr
@@ -0,0 +1,167 @@
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<!DOCTYPE html>
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<HTML>
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<HEAD>
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<STYLE>
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body {
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background-color: Canvas;
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color: CanvasText;
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color-scheme: light dark;
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}
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</STYLE>
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<SCRIPT>
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function DrawSpan( colspan, freq, target, docolor, extrastr = "" )
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{
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var fdist = Math.abs( freq - target );
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fdist = Math.pow( fdist, 0.5 ) * 500;
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// if( fdist > 255 ) fdist = 255;
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let ret = "<TD COLSPAN=" + colspan + ' ';
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if( docolor ) ret += 'STYLE="color:black;background-color:rgb(' + fdist + ',' + (511-fdist) + ',0)";';
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ret += '>' + extrastr + freq.toFixed(6) + "</TD>";
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return ret;
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}
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function Goertz( n, mhz, fr )
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{
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let omega = fr * 2 * 3.1415926535*2.0;
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var textarea = document.getElementById("goertzeloutput");
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textarea.value =
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"#define PWM_PERIOD ("+n+"-1)\n" +
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"const int32_t g_goertzel_omega_per_sample = " + ( omega*2*(1<<29)).toFixed(0) + "; // " + mhz.toFixed(6) + "MHz\n" +
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"const int32_t g_goertzel_coefficient = " + (2 * Math.cos( omega ) * (1<<30)).toFixed(0) + ";\n" +
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"const int32_t g_goertzel_coefficient_s = "+ (2 * Math.sin( omega ) * (1<<30)).toFixed(0) + ";\n";
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// Highlight its content
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textarea.select();
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// Copy the highlighted text
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document.execCommand("copy");
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}
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function computeTable()
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{
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const max_harmonics = 28|0;
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const min_harmonics = 1|0;
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let xtal = Number(document.getElementById("crystalmhz").value );
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let target = Number(document.getElementById("targetmhz").value );
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let quadrature = document.getElementById("QUADRATURE").checked;
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let contents = "";
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if( quadrature )
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{
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contents += "<TABLE>" +
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"<TR><TD>Quadrature:</TD></TR>" +
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"<TR><TD>I = + + - -</TD></TR>" +
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"<TR><TD>Q = + - - +</TD></TR>" +
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"<TR><TD>Differntial:</TD></TR>" +
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"<TR><TD>V = + - + -</TD></TR>" +
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"<TR><TD>You choose the mode you operate in, either Quadrature or differential</TD></TR>" +
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"</TABLE>" +
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"<p> Table shows: </P>" +
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"<TABLE BORDER=1>" +
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"<TR><TD>Sample Frequency Harmonic</TD></TR>" +
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"<TR><TD>Lower Quadrature Frequency</TD></TR>" +
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"<TR><TD>Upper Quadrature Frequency</TD></TR>" +
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"<TR><TD>Differential Frequency</TD></TR>" +
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"</TABLE>";
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}
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else
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{
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contents +=
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"<TABLE BORDER=1>" +
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"<TR><TD>Goertzel</TD></TR>" +
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"<TR><TD>Goertzel (Inverse)</TD></TR>" +
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"</TABLE><TEXTAREA ROWS=5 COLS=80 ID=goertzeloutput></TEXTAREA>";
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}
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contents += "<TABLE BORDER=1>";
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contents += '<TR><TH>d\\h</div></TH>';
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for( let h = 0|min_harmonics; h <= max_harmonics; h++ )
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{
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contents += "<TH COLSPAN=2>" + h + "</TH>";
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}
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for( let n = 0|28; n <= 66; n++ )
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{
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let freq = ( xtal / n );
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let goertzelpoint = 0;
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let goertzelpointinv = 0;
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for( let h = 0|min_harmonics; h <= max_harmonics; h++ )
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{
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let base = freq * h;
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let next = freq * (h+1);
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if( target <= next && target >= base )
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{
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goertzelpoint = ( target - base ) / ( next - base );
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goertzelpointinv = - (1.0 - ( target - base ) / ( next - base ));
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}
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}
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contents += "</TR>";
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for( let mode = 0; mode < 4; mode++ )
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{
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contents += "<TR>";
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if( mode == 0 )
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contents += "<TD ROWSPAN=" + 4 + ">" + n + "</TD>";
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for( let h = 0|min_harmonics; h <= max_harmonics; h++ )
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{
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if( quadrature )
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{
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if( mode == 0 )
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contents += DrawSpan( 2, freq * h, target, false );
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else if( mode == 1 )
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contents += DrawSpan( 2, freq * (h-.25), target, true );
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else if( mode == 2 )
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contents += DrawSpan( 2, freq * (h+.25), target, true );
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else if( mode == 3 )
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contents += DrawSpan( 2, freq * (h+0.5), target, true );
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}
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else
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{
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if( mode == 0 )
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{
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contents += "<TD COLSPAN=2><SPAN ONCLICK='Goertz(" + n + ", " + freq * (h+goertzelpoint) + ", " + (-goertzelpointinv) + ")'>↑" + (-goertzelpointinv).toFixed(6) + "</SPAN></TD>";
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}
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else if( mode == 1 )
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{
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contents += DrawSpan( 2, freq * (h+goertzelpoint), target, true );
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}
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else if( mode == 2 )
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{
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contents += "<TD COLSPAN=2><SPAN ONCLICK='Goertz(" + n + ", " + freq * (h+goertzelpointinv) + ", " + goertzelpoint + ")'>↓" + goertzelpoint.toFixed(6) + "</SPAN></TD>";
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}
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else if( mode == 3 )
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{
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contents += DrawSpan( 2, freq * (h+goertzelpointinv), target, true );
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}
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}
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}
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contents += "</TD>";
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}
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}
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contents += "</TABLE>";
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document.getElementById( "TABLE" ).innerHTML = contents;
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}
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</SCRIPT>
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</HEAD>
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<BODY>
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<p>Tool for computing tuning to specific frequencies by use of direct ADC reading at specific timer-controlled rate to "tune" to specific frequencies either by quadrature or differential.</p>
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<TABLE>
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<TR><TD>Crystal MHz</TD><TD><INPUT ID=crystalmhz VALUE=144></TD></TR>
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<TR><TD>Target MHz</TD><TD><INPUT ID=targetmhz VALUE=27.019360></TD></TR>
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<TR><TD>Table Type</TD><TD><INPUT TYPE=RADIO ID=QUADRATURE NAME=computetype checked>Quadrature</INPUT><INPUT TYPE=RADIO ID=GOERTZELS NAME=computetype>Goertzels</INPUT></TD></TR>
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<TR><TD COLSPAN=2><INPUT TYPE=SUBMIT VALUE="Compute" ONCLICK="computeTable()"></TD></TR>
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</TABLE>
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<DIV ID=TABLE></DIV>
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</BODY>
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</HTML>
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File diff suppressed because it is too large
Load Diff
@@ -0,0 +1,713 @@
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/*
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* Single-File-Header for using SPI OLED
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* 05-05-2023 E. Brombaugh
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*/
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#ifndef _SSD1306_H
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#define _SSD1306_H
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#include <stdint.h>
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#include <string.h>
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#include "font_8x8.h"
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// comfortable packet size for this OLED
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#define SSD1306_PSZ 32
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// characteristics of each type
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#if !defined (SSD1306_64X32) && !defined (SSD1306_128X32) && !defined (SSD1306_128X64) && !defined (SH1107_128x128)
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#error "Please define the SSD1306_WXH resolution used in your application"
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#endif
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#ifdef SSD1306_64X32
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#define SSD1306_W 64
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#define SSD1306_H 32
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#define SSD1306_FULLUSE
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#define SSD1306_OFFSET 32
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#endif
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#ifdef SSD1306_128X32
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#define SSD1306_W 128
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#define SSD1306_H 32
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#define SSD1306_OFFSET 0
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#endif
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#ifdef SSD1306_128X64
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#define SSD1306_W 128
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#define SSD1306_H 64
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#define SSD1306_FULLUSE
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#define SSD1306_OFFSET 0
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#endif
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#ifdef SH1107_128x128
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#define SH1107
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#define SSD1306_FULLUSE
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#define SSD1306_W 128
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#define SSD1306_H 128
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#define SSD1306_FULLUSE
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#define SSD1306_OFFSET 0
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#endif
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/*
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* send OLED command byte
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*/
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uint8_t ssd1306_cmd(uint8_t cmd)
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{
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ssd1306_pkt_send(&cmd, 1, 1);
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return 0;
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}
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/*
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* send OLED data packet (up to 32 bytes)
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*/
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uint8_t ssd1306_data(uint8_t *data, uint8_t sz)
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{
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ssd1306_pkt_send(data, sz, 0);
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return 0;
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}
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#define SSD1306_SETCONTRAST 0x81
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#define SSD1306_SEGREMAP 0xA0
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#define SSD1306_DISPLAYALLON_RESUME 0xA4
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#define SSD1306_DISPLAYALLON 0xA5
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#define SSD1306_NORMALDISPLAY 0xA6
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#define SSD1306_INVERTDISPLAY 0xA7
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#define SSD1306_DISPLAYOFF 0xAE
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#define SSD1306_DISPLAYON 0xAF
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#define SSD1306_SETDISPLAYOFFSET 0xD3
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#define SSD1306_SETCOMPINS 0xDA
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#define SSD1306_SETVCOMDETECT 0xDB
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#define SSD1306_SETDISPLAYCLOCKDIV 0xD5
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#define SSD1306_SETPRECHARGE 0xD9
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#define SSD1306_SETMULTIPLEX 0xA8
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#define SSD1306_SETLOWCOLUMN 0x00
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#define SSD1306_SETHIGHCOLUMN 0x10
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#define SSD1306_SETSTARTLINE 0x40
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#define SSD1306_MEMORYMODE 0x20
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#define SSD1306_COLUMNADDR 0x21
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#define SSD1306_PAGEADDR 0x22
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#define SSD1306_COMSCANINC 0xC0
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#define SSD1306_COMSCANDEC 0xC8
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#define SSD1306_CHARGEPUMP 0x8D
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#define SSD1306_EXTERNALVCC 0x1
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#define SSD1306_SWITCHCAPVCC 0x2
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#define SSD1306_TERMINATE_CMDS 0xFF
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/* choose VCC mode */
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#define SSD1306_EXTERNALVCC 0x1
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#define SSD1306_SWITCHCAPVCC 0x2
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//#define vccstate SSD1306_EXTERNALVCC
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#define vccstate SSD1306_SWITCHCAPVCC
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// OLED initialization commands for 128x32
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const uint8_t ssd1306_init_array[] =
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{
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#ifdef SH1107
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SSD1306_DISPLAYOFF, // Turn OLED off
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0x00, // Low column
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0x10, // High column
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0xb0, // Page address
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0xdc, 0x00, // Set Display Start Line (Where in memory it reads from)
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SSD1306_SETCONTRAST, 0x6f, // Set constrast
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SSD1306_COLUMNADDR, // Set memory addressing mode
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SSD1306_DISPLAYALLON_RESUME, // normal (as opposed to invert colors, always on or off.)
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SSD1306_SETMULTIPLEX, (SSD1306_H-1), // Iterate over all 128 rows (Multiplex Ratio)
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SSD1306_SETDISPLAYOFFSET, 0x00, // Set display offset // Where this appears on-screen (Some displays will be different)
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SSD1306_SETDISPLAYCLOCKDIV, 0xf0, // Set precharge properties. THIS IS A LIE This has todo with timing. <<< This makes it go brrrrrrrrr
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SSD1306_SETPRECHARGE, 0x1d, // Set pre-charge period (This controls brightness)
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SSD1306_SETVCOMDETECT, 0x35, // Set vcomh
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SSD1306_SETSTARTLINE | 0x0, // 0x40 | line
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0xad, 0x80, // Set Charge pump
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SSD1306_SEGREMAP, 0x01, // Default mapping
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SSD1306_SETPRECHARGE, 0x06, // ???? No idea what this does, but this looks best.
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SSD1306_SETCONTRAST, 0xfe, // Set constrast
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SSD1306_SETVCOMDETECT, 0xfe, // Set vcomh
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SSD1306_SETMULTIPLEX, (SSD1306_H-1), // 128-wide.
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SSD1306_DISPLAYON, // Display on.
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#else
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SSD1306_DISPLAYOFF, // 0xAE
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SSD1306_SETDISPLAYCLOCKDIV, // 0xD5
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0x80, // the suggested ratio 0x80
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SSD1306_SETMULTIPLEX, // 0xA8
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#ifdef SSD1306_64X32
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0x1F, // for 64-wide displays
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#else
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0x3F, // for 128-wide displays
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#endif
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SSD1306_SETDISPLAYOFFSET, // 0xD3
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0x00, // no offset
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SSD1306_SETSTARTLINE | 0x0, // 0x40 | line
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SSD1306_CHARGEPUMP, // 0x8D
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0x14, // enable?
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SSD1306_MEMORYMODE, // 0x20
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0x00, // 0x0 act like ks0108
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SSD1306_SEGREMAP | 0x1, // 0xA0 | bit
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SSD1306_COMSCANDEC,
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SSD1306_SETCOMPINS, // 0xDA
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0x12, //
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SSD1306_SETCONTRAST, // 0x81
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0x8F,
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SSD1306_SETPRECHARGE, // 0xd9
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0xF1,
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SSD1306_SETVCOMDETECT, // 0xDB
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0x40,
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SSD1306_DISPLAYALLON_RESUME, // 0xA4
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SSD1306_NORMALDISPLAY, // 0xA6
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SSD1306_DISPLAYON, // 0xAF --turn on oled panel
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#endif
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SSD1306_TERMINATE_CMDS // 0xFF --fake command to mark end
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};
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// the display buffer
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uint8_t ssd1306_buffer[SSD1306_W*SSD1306_H/8];
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/*
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* set the buffer to a color
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*/
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void ssd1306_setbuf(uint8_t color)
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{
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memset(ssd1306_buffer, color ? 0xFF : 0x00, sizeof(ssd1306_buffer));
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}
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#ifndef SSD1306_FULLUSE
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/*
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* expansion array for OLED with every other row unused
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*/
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const uint8_t expand[16] =
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{
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0x00,0x02,0x08,0x0a,
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0x20,0x22,0x28,0x2a,
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0x80,0x82,0x88,0x8a,
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0xa0,0xa2,0xa8,0xaa,
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};
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#endif
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/*
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* Send the frame buffer
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*/
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void ssd1306_refresh(void)
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{
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uint16_t i;
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#ifdef SH1107
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ssd1306_cmd(SSD1306_MEMORYMODE); // vertical addressing mode.
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for(i=0;i<SSD1306_H/8;i++)
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{
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ssd1306_cmd(0xb0 | i);
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ssd1306_cmd( 0x00 | (0&0xf) );
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ssd1306_cmd( 0x10 | (0>>4) );
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ssd1306_data(&ssd1306_buffer[i*4*SSD1306_PSZ+0*SSD1306_PSZ], SSD1306_PSZ);
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||||
ssd1306_data(&ssd1306_buffer[i*4*SSD1306_PSZ+1*SSD1306_PSZ], SSD1306_PSZ);
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ssd1306_data(&ssd1306_buffer[i*4*SSD1306_PSZ+2*SSD1306_PSZ], SSD1306_PSZ);
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||||
ssd1306_data(&ssd1306_buffer[i*4*SSD1306_PSZ+3*SSD1306_PSZ], SSD1306_PSZ);
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}
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#else
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||||
ssd1306_cmd(SSD1306_COLUMNADDR);
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||||
ssd1306_cmd(SSD1306_OFFSET); // Column start address (0 = reset)
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||||
ssd1306_cmd(SSD1306_OFFSET+SSD1306_W-1); // Column end address (127 = reset)
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||||
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||||
ssd1306_cmd(SSD1306_PAGEADDR);
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||||
ssd1306_cmd(0); // Page start address (0 = reset)
|
||||
ssd1306_cmd(7); // Page end address
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||||
|
||||
#ifdef SSD1306_FULLUSE
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||||
/* for fully used rows just plow thru everything */
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||||
for(i=0;i<sizeof(ssd1306_buffer);i+=SSD1306_PSZ)
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||||
{
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/* send PSZ block of data */
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ssd1306_data(&ssd1306_buffer[i], SSD1306_PSZ);
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||||
}
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||||
#else
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/* for displays with odd rows unused expand bytes */
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||||
uint8_t tbuf[SSD1306_PSZ], j, k;
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for(i=0;i<sizeof(ssd1306_buffer);i+=128)
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||||
{
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||||
/* low nybble */
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for(j=0;j<128;j+=SSD1306_PSZ)
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||||
{
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for(k=0;k<SSD1306_PSZ;k++)
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tbuf[k] = expand[ssd1306_buffer[i+j+k]&0xf];
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||||
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||||
/* send PSZ block of data */
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||||
ssd1306_data(tbuf, SSD1306_PSZ);
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||||
}
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||||
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||||
/* high nybble */
|
||||
for(j=0;j<128;j+=SSD1306_PSZ)
|
||||
{
|
||||
for(k=0;k<SSD1306_PSZ;k++)
|
||||
tbuf[k] = expand[(ssd1306_buffer[i+j+k]>>4)&0xf];
|
||||
|
||||
/* send PSZ block of data */
|
||||
ssd1306_data(tbuf, SSD1306_PSZ);
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||||
}
|
||||
}
|
||||
#endif
|
||||
#endif
|
||||
|
||||
}
|
||||
|
||||
/*
|
||||
* plot a pixel in the buffer
|
||||
*/
|
||||
void ssd1306_drawPixel(uint8_t x, uint8_t y, uint8_t color)
|
||||
{
|
||||
uint16_t addr;
|
||||
|
||||
/* clip */
|
||||
if(x >= SSD1306_W)
|
||||
return;
|
||||
if(y >= SSD1306_H)
|
||||
return;
|
||||
|
||||
/* compute buffer address */
|
||||
addr = x + SSD1306_W*(y/8);
|
||||
|
||||
/* set/clear bit in buffer */
|
||||
if(color)
|
||||
ssd1306_buffer[addr] |= (1<<(y&7));
|
||||
else
|
||||
ssd1306_buffer[addr] &= ~(1<<(y&7));
|
||||
}
|
||||
|
||||
/*
|
||||
* plot a pixel in the buffer
|
||||
*/
|
||||
void ssd1306_xorPixel(uint8_t x, uint8_t y)
|
||||
{
|
||||
uint16_t addr;
|
||||
|
||||
/* clip */
|
||||
if(x >= SSD1306_W)
|
||||
return;
|
||||
if(y >= SSD1306_H)
|
||||
return;
|
||||
|
||||
/* compute buffer address */
|
||||
addr = x + SSD1306_W*(y/8);
|
||||
|
||||
ssd1306_buffer[addr] ^= (1<<(y&7));
|
||||
}
|
||||
|
||||
/*
|
||||
* draw a an image from an array, directly into to the display buffer
|
||||
* the color modes allow for overwriting and even layering (sprites!)
|
||||
*/
|
||||
void ssd1306_drawImage(uint8_t x, uint8_t y, const unsigned char* input, uint8_t width, uint8_t height, uint8_t color_mode) {
|
||||
uint8_t x_absolute;
|
||||
uint8_t y_absolute;
|
||||
uint8_t pixel;
|
||||
uint8_t bytes_to_draw = width / 8;
|
||||
uint16_t buffer_addr;
|
||||
|
||||
for (uint8_t line = 0; line < height; line++) {
|
||||
y_absolute = y + line;
|
||||
if (y_absolute >= SSD1306_H) {
|
||||
break;
|
||||
}
|
||||
|
||||
// SSD1306 is in vertical mode, yet we want to draw horizontally, which necessitates assembling the output bytes from the input data
|
||||
// bitmask for current pixel in vertical (output) byte
|
||||
uint8_t v_mask = 1 << (y_absolute & 7);
|
||||
|
||||
for (uint8_t byte = 0; byte < bytes_to_draw; byte++) {
|
||||
uint8_t input_byte = input[byte + line * bytes_to_draw];
|
||||
|
||||
for (pixel = 0; pixel < 8; pixel++) {
|
||||
x_absolute = x + 8 * (bytes_to_draw - byte) + pixel;
|
||||
if (x_absolute >= SSD1306_W) {
|
||||
break;
|
||||
}
|
||||
// looking at the horizontal display, we're drawing bytes bottom to top, not left to right, hence y / 8
|
||||
buffer_addr = x_absolute + SSD1306_W * (y_absolute / 8);
|
||||
// state of current pixel
|
||||
uint8_t input_pixel = input_byte & (1 << pixel);
|
||||
|
||||
switch (color_mode) {
|
||||
case 0:
|
||||
// write pixels as they are
|
||||
ssd1306_buffer[buffer_addr] = (ssd1306_buffer[buffer_addr] & ~v_mask) | (input_pixel ? v_mask : 0);
|
||||
break;
|
||||
case 1:
|
||||
// write pixels after inversion
|
||||
ssd1306_buffer[buffer_addr] = (ssd1306_buffer[buffer_addr] & ~v_mask) | (!input_pixel ? v_mask : 0);
|
||||
break;
|
||||
case 2:
|
||||
// 0 clears pixel
|
||||
ssd1306_buffer[buffer_addr] &= input_pixel ? 0xFF : ~v_mask;
|
||||
break;
|
||||
case 3:
|
||||
// 1 sets pixel
|
||||
ssd1306_buffer[buffer_addr] |= input_pixel ? v_mask : 0;
|
||||
break;
|
||||
case 4:
|
||||
// 0 sets pixel
|
||||
ssd1306_buffer[buffer_addr] |= !input_pixel ? v_mask : 0;
|
||||
break;
|
||||
case 5:
|
||||
// 1 clears pixel
|
||||
ssd1306_buffer[buffer_addr] &= input_pixel ? ~v_mask : 0xFF;
|
||||
break;
|
||||
}
|
||||
}
|
||||
#if SSD1306_LOG_IMAGE == 1
|
||||
printf("%02x ", input_byte);
|
||||
#endif
|
||||
}
|
||||
#if SSD1306_LOG_IMAGE == 1
|
||||
printf("\n\r");
|
||||
#endif
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* fast vert line
|
||||
*/
|
||||
void ssd1306_drawFastVLine(uint8_t x, uint8_t y, uint8_t h, uint8_t color)
|
||||
{
|
||||
// clipping
|
||||
if((x >= SSD1306_W) || (y >= SSD1306_H)) return;
|
||||
if((y+h-1) >= SSD1306_H) h = SSD1306_H-y;
|
||||
while(h--)
|
||||
{
|
||||
ssd1306_drawPixel(x, y++, color);
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* fast horiz line
|
||||
*/
|
||||
void ssd1306_drawFastHLine(uint8_t x, uint8_t y, uint8_t w, uint8_t color)
|
||||
{
|
||||
// clipping
|
||||
if((x >= SSD1306_W) || (y >= SSD1306_H)) return;
|
||||
if((x+w-1) >= SSD1306_W) w = SSD1306_W-x;
|
||||
|
||||
while (w--)
|
||||
{
|
||||
ssd1306_drawPixel(x++, y, color);
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* abs() helper function for line drawing
|
||||
*/
|
||||
int16_t gfx_abs(int16_t x)
|
||||
{
|
||||
return (x<0) ? -x : x;
|
||||
}
|
||||
|
||||
/*
|
||||
* swap() helper function for line drawing
|
||||
*/
|
||||
void gfx_swap(uint16_t *z0, uint16_t *z1)
|
||||
{
|
||||
uint16_t temp = *z0;
|
||||
*z0 = *z1;
|
||||
*z1 = temp;
|
||||
}
|
||||
|
||||
/*
|
||||
* Bresenham line draw routine swiped from Wikipedia
|
||||
*/
|
||||
void ssd1306_drawLine(uint16_t x0, uint16_t y0, uint16_t x1, uint16_t y1, uint8_t color)
|
||||
{
|
||||
int16_t steep;
|
||||
int16_t deltax, deltay, error, ystep, x, y;
|
||||
|
||||
/* flip sense 45deg to keep error calc in range */
|
||||
steep = (gfx_abs(y1 - y0) > gfx_abs(x1 - x0));
|
||||
|
||||
if(steep)
|
||||
{
|
||||
gfx_swap(&x0, &y0);
|
||||
gfx_swap(&x1, &y1);
|
||||
}
|
||||
|
||||
/* run low->high */
|
||||
if(x0 > x1)
|
||||
{
|
||||
gfx_swap(&x0, &x1);
|
||||
gfx_swap(&y0, &y1);
|
||||
}
|
||||
|
||||
/* set up loop initial conditions */
|
||||
deltax = x1 - x0;
|
||||
deltay = gfx_abs(y1 - y0);
|
||||
error = deltax/2;
|
||||
y = y0;
|
||||
if(y0 < y1)
|
||||
ystep = 1;
|
||||
else
|
||||
ystep = -1;
|
||||
|
||||
/* loop x */
|
||||
for(x=x0;x<=x1;x++)
|
||||
{
|
||||
/* plot point */
|
||||
if(steep)
|
||||
/* flip point & plot */
|
||||
ssd1306_drawPixel(y, x, color);
|
||||
else
|
||||
/* just plot */
|
||||
ssd1306_drawPixel(x, y, color);
|
||||
|
||||
/* update error */
|
||||
error = error - deltay;
|
||||
|
||||
/* update y */
|
||||
if(error < 0)
|
||||
{
|
||||
y = y + ystep;
|
||||
error = error + deltax;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* draws a circle
|
||||
*/
|
||||
void ssd1306_drawCircle(int16_t x, int16_t y, int16_t radius, int8_t color)
|
||||
{
|
||||
/* Bresenham algorithm */
|
||||
int16_t x_pos = -radius;
|
||||
int16_t y_pos = 0;
|
||||
int16_t err = 2 - 2 * radius;
|
||||
int16_t e2;
|
||||
|
||||
do {
|
||||
ssd1306_drawPixel(x - x_pos, y + y_pos, color);
|
||||
ssd1306_drawPixel(x + x_pos, y + y_pos, color);
|
||||
ssd1306_drawPixel(x + x_pos, y - y_pos, color);
|
||||
ssd1306_drawPixel(x - x_pos, y - y_pos, color);
|
||||
e2 = err;
|
||||
if (e2 <= y_pos) {
|
||||
err += ++y_pos * 2 + 1;
|
||||
if(-x_pos == y_pos && e2 <= x_pos) {
|
||||
e2 = 0;
|
||||
}
|
||||
}
|
||||
if (e2 > x_pos) {
|
||||
err += ++x_pos * 2 + 1;
|
||||
}
|
||||
} while (x_pos <= 0);
|
||||
}
|
||||
|
||||
/*
|
||||
* draws a filled circle
|
||||
*/
|
||||
void ssd1306_fillCircle(int16_t x, int16_t y, int16_t radius, int8_t color)
|
||||
{
|
||||
/* Bresenham algorithm */
|
||||
int16_t x_pos = -radius;
|
||||
int16_t y_pos = 0;
|
||||
int16_t err = 2 - 2 * radius;
|
||||
int16_t e2;
|
||||
|
||||
do {
|
||||
ssd1306_drawPixel(x - x_pos, y + y_pos, color);
|
||||
ssd1306_drawPixel(x + x_pos, y + y_pos, color);
|
||||
ssd1306_drawPixel(x + x_pos, y - y_pos, color);
|
||||
ssd1306_drawPixel(x - x_pos, y - y_pos, color);
|
||||
ssd1306_drawFastHLine(x + x_pos, y + y_pos, 2 * (-x_pos) + 1, color);
|
||||
ssd1306_drawFastHLine(x + x_pos, y - y_pos, 2 * (-x_pos) + 1, color);
|
||||
e2 = err;
|
||||
if (e2 <= y_pos) {
|
||||
err += ++y_pos * 2 + 1;
|
||||
if(-x_pos == y_pos && e2 <= x_pos) {
|
||||
e2 = 0;
|
||||
}
|
||||
}
|
||||
if(e2 > x_pos) {
|
||||
err += ++x_pos * 2 + 1;
|
||||
}
|
||||
} while(x_pos <= 0);
|
||||
}
|
||||
|
||||
/*
|
||||
* draw a rectangle
|
||||
*/
|
||||
void ssd1306_drawRect(uint8_t x, uint8_t y, uint8_t w, uint8_t h, uint8_t color)
|
||||
{
|
||||
ssd1306_drawFastVLine(x, y, h, color);
|
||||
ssd1306_drawFastVLine(x+w-1, y, h, color);
|
||||
ssd1306_drawFastHLine(x, y, w, color);
|
||||
ssd1306_drawFastHLine(x, y+h-1, w, color);
|
||||
}
|
||||
|
||||
/*
|
||||
* fill a rectangle
|
||||
*/
|
||||
void ssd1306_fillRect(uint8_t x, uint8_t y, uint8_t w, uint8_t h, uint8_t color)
|
||||
{
|
||||
uint8_t m, n=y, iw = w;
|
||||
|
||||
/* scan vertical */
|
||||
while(h--)
|
||||
{
|
||||
m=x;
|
||||
w=iw;
|
||||
/* scan horizontal */
|
||||
while(w--)
|
||||
{
|
||||
/* invert pixels */
|
||||
ssd1306_drawPixel(m++, n, color);
|
||||
}
|
||||
n++;
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* invert a rectangle in the buffer
|
||||
*/
|
||||
void ssd1306_xorrect(uint8_t x, uint8_t y, uint8_t w, uint8_t h)
|
||||
{
|
||||
uint8_t m, n=y, iw = w;
|
||||
|
||||
/* scan vertical */
|
||||
while(h--)
|
||||
{
|
||||
m=x;
|
||||
w=iw;
|
||||
/* scan horizontal */
|
||||
while(w--)
|
||||
{
|
||||
/* invert pixels */
|
||||
ssd1306_xorPixel(m++, n);
|
||||
}
|
||||
n++;
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* Draw character to the display buffer
|
||||
*/
|
||||
void ssd1306_drawchar(uint8_t x, uint8_t y, uint8_t chr, uint8_t color)
|
||||
{
|
||||
uint16_t i, j, col;
|
||||
uint8_t d;
|
||||
|
||||
for(i=0;i<8;i++)
|
||||
{
|
||||
d = fontdata[(chr<<3)+i];
|
||||
for(j=0;j<8;j++)
|
||||
{
|
||||
if(d&0x80)
|
||||
col = color;
|
||||
else
|
||||
col = (~color)&1;
|
||||
|
||||
ssd1306_drawPixel(x+j, y+i, col);
|
||||
|
||||
// next bit
|
||||
d <<= 1;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* draw a string to the display
|
||||
*/
|
||||
void ssd1306_drawstr(uint8_t x, uint8_t y, char *str, uint8_t color)
|
||||
{
|
||||
uint8_t c;
|
||||
|
||||
while((c=*str++))
|
||||
{
|
||||
ssd1306_drawchar(x, y, c, color);
|
||||
x += 8;
|
||||
if(x>120)
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* enum for font size
|
||||
*/
|
||||
typedef enum {
|
||||
fontsize_8x8 = 1,
|
||||
fontsize_16x16 = 2,
|
||||
fontsize_32x32 = 4,
|
||||
fontsize_64x64 = 8,
|
||||
} font_size_t;
|
||||
|
||||
/*
|
||||
* Draw character to the display buffer, scaled to size
|
||||
*/
|
||||
void ssd1306_drawchar_sz(uint8_t x, uint8_t y, uint8_t chr, uint8_t color, font_size_t font_size)
|
||||
{
|
||||
uint16_t i, j, col;
|
||||
uint8_t d;
|
||||
|
||||
// Determine the font scale factor based on the font_size parameter
|
||||
uint8_t font_scale = (uint8_t)font_size;
|
||||
|
||||
// Loop through each row of the font data
|
||||
for (i = 0; i < 8; i++)
|
||||
{
|
||||
// Retrieve the font data for the current row
|
||||
d = fontdata[(chr << 3) + i];
|
||||
|
||||
// Loop through each column of the font data
|
||||
for (j = 0; j < 8; j++)
|
||||
{
|
||||
// Determine the color to draw based on the current bit in the font data
|
||||
if (d & 0x80)
|
||||
col = color;
|
||||
else
|
||||
col = (~color) & 1;
|
||||
|
||||
// Draw the pixel at the original size and scaled size using nested for-loops
|
||||
for (uint8_t k = 0; k < font_scale; k++) {
|
||||
for (uint8_t l = 0; l < font_scale; l++) {
|
||||
ssd1306_drawPixel(x + (j * font_scale) + k, y + (i * font_scale) + l, col);
|
||||
}
|
||||
}
|
||||
|
||||
// Move to the next bit in the font data
|
||||
d <<= 1;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* draw a string to the display buffer, scaled to size
|
||||
*/
|
||||
void ssd1306_drawstr_sz(uint8_t x, uint8_t y, char *str, uint8_t color, font_size_t font_size)
|
||||
{
|
||||
uint8_t c;
|
||||
|
||||
while((c=*str++))
|
||||
{
|
||||
ssd1306_drawchar_sz(x, y, c, color, font_size);
|
||||
x += 8 * font_size;
|
||||
if(x>128 - 8 * font_size)
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* initialize I2C and OLED
|
||||
*/
|
||||
uint8_t ssd1306_init(void)
|
||||
{
|
||||
// pulse reset
|
||||
ssd1306_rst();
|
||||
|
||||
// initialize OLED
|
||||
uint8_t *cmd_list = (uint8_t *)ssd1306_init_array;
|
||||
while(*cmd_list != SSD1306_TERMINATE_CMDS)
|
||||
{
|
||||
if(ssd1306_cmd(*cmd_list++))
|
||||
return 1;
|
||||
}
|
||||
|
||||
// clear display
|
||||
ssd1306_setbuf(0);
|
||||
ssd1306_refresh();
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
#endif
|
||||
@@ -0,0 +1,374 @@
|
||||
/*
|
||||
* Single-File-Header for SSD1306 I2C interface
|
||||
* 05-07-2023 E. Brombaugh
|
||||
*/
|
||||
|
||||
#ifndef _SSD1306_I2C_H
|
||||
#define _SSD1306_I2C_H
|
||||
|
||||
#include <string.h>
|
||||
|
||||
// SSD1306 I2C address
|
||||
#define SSD1306_I2C_ADDR 0x3c
|
||||
|
||||
// I2C Bus clock rate - must be lower the Logic clock rate
|
||||
#define SSD1306_I2C_CLKRATE 1000000
|
||||
|
||||
// I2C Logic clock rate - must be higher than Bus clock rate
|
||||
#define SSD1306_I2C_PRERATE 2000000
|
||||
|
||||
// uncomment this for high-speed 36% duty cycle, otherwise 33%
|
||||
#define SSD1306_I2C_DUTY
|
||||
|
||||
// I2C Timeout count
|
||||
#define TIMEOUT_MAX 100000
|
||||
|
||||
// uncomment this to enable IRQ-driven operation
|
||||
//#define SSD1306_I2C_IRQ
|
||||
|
||||
#ifdef SSD1306_I2C_IRQ
|
||||
// some stuff that IRQ mode needs
|
||||
volatile uint8_t ssd1306_i2c_send_buffer[64], *ssd1306_i2c_send_ptr, ssd1306_i2c_send_sz, ssd1306_i2c_irq_state;
|
||||
|
||||
// uncomment this to enable time diags in IRQ
|
||||
//#define IRQ_DIAG
|
||||
#endif
|
||||
|
||||
/*
|
||||
* init just I2C
|
||||
*/
|
||||
void ssd1306_i2c_setup(void)
|
||||
{
|
||||
uint16_t tempreg;
|
||||
|
||||
// Reset I2C1 to init all regs
|
||||
RCC->APB1PRSTR |= RCC_APB1Periph_I2C1;
|
||||
RCC->APB1PRSTR &= ~RCC_APB1Periph_I2C1;
|
||||
|
||||
// set freq
|
||||
tempreg = I2C1->CTLR2;
|
||||
tempreg &= ~I2C_CTLR2_FREQ;
|
||||
tempreg |= (FUNCONF_SYSTEM_CORE_CLOCK/SSD1306_I2C_PRERATE)&I2C_CTLR2_FREQ;
|
||||
I2C1->CTLR2 = tempreg;
|
||||
|
||||
// Set clock config
|
||||
tempreg = 0;
|
||||
#if (SSD1306_I2C_CLKRATE <= 100000)
|
||||
// standard mode good to 100kHz
|
||||
tempreg = (FUNCONF_SYSTEM_CORE_CLOCK/(2*SSD1306_I2C_CLKRATE))&SSD1306_I2C_CKCFGR_CCR;
|
||||
#else
|
||||
// fast mode over 100kHz
|
||||
#ifndef SSD1306_I2C_DUTY
|
||||
// 33% duty cycle
|
||||
tempreg = (FUNCONF_SYSTEM_CORE_CLOCK/(3*SSD1306_I2C_CLKRATE))&SSD1306_I2C_CKCFGR_CCR;
|
||||
#else
|
||||
// 36% duty cycle
|
||||
tempreg = (FUNCONF_SYSTEM_CORE_CLOCK/(25*SSD1306_I2C_CLKRATE))&I2C_CKCFGR_CCR;
|
||||
tempreg |= I2C_CKCFGR_DUTY;
|
||||
#endif
|
||||
tempreg |= I2C_CKCFGR_FS;
|
||||
#endif
|
||||
I2C1->CKCFGR = tempreg;
|
||||
|
||||
#ifdef SSD1306_I2C_IRQ
|
||||
// enable IRQ driven operation
|
||||
NVIC_EnableIRQ(I2C1_EV_IRQn);
|
||||
|
||||
// initialize the state
|
||||
ssd1306_i2c_irq_state = 0;
|
||||
#endif
|
||||
|
||||
// Enable I2C
|
||||
I2C1->CTLR1 |= I2C_CTLR1_PE;
|
||||
|
||||
// set ACK mode
|
||||
I2C1->CTLR1 |= I2C_CTLR1_ACK;
|
||||
}
|
||||
|
||||
/*
|
||||
* error descriptions
|
||||
*/
|
||||
char *errstr[] =
|
||||
{
|
||||
"not busy",
|
||||
"master mode",
|
||||
"transmit mode",
|
||||
"tx empty",
|
||||
"transmit complete",
|
||||
};
|
||||
|
||||
/*
|
||||
* error handler
|
||||
*/
|
||||
uint8_t ssd1306_i2c_error(uint8_t err)
|
||||
{
|
||||
// report error
|
||||
printf("ssd1306_i2c_error - timeout waiting for %s\n\r", errstr[err]);
|
||||
|
||||
// reset & initialize I2C
|
||||
ssd1306_i2c_setup();
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
// event codes we use
|
||||
#define SSD1306_I2C_EVENT_MASTER_MODE_SELECT ((uint32_t)0x00030001) /* BUSY, MSL and SB flag */
|
||||
#define SSD1306_I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED ((uint32_t)0x00070082) /* BUSY, MSL, ADDR, TXE and TRA flags */
|
||||
#define SSD1306_I2C_EVENT_MASTER_BYTE_TRANSMITTED ((uint32_t)0x00070084) /* TRA, BUSY, MSL, TXE and BTF flags */
|
||||
|
||||
/*
|
||||
* check for 32-bit event codes
|
||||
*/
|
||||
uint8_t ssd1306_i2c_chk_evt(uint32_t event_mask)
|
||||
{
|
||||
/* read order matters here! STAR1 before STAR2!! */
|
||||
uint32_t status = I2C1->STAR1 | (I2C1->STAR2<<16);
|
||||
return (status & event_mask) == event_mask;
|
||||
}
|
||||
|
||||
#ifdef SSD1306_I2C_IRQ
|
||||
/*
|
||||
* packet send for IRQ-driven operation
|
||||
*/
|
||||
uint8_t ssd1306_i2c_send(uint8_t addr, uint8_t *data, uint8_t sz)
|
||||
{
|
||||
int32_t timeout;
|
||||
|
||||
#ifdef IRQ_DIAG
|
||||
GPIOC->BSHR = (1<<(3));
|
||||
#endif
|
||||
|
||||
// error out if buffer under/overflow
|
||||
if((sz > sizeof(ssd1306_i2c_send_buffer)) || !sz)
|
||||
return 2;
|
||||
|
||||
// wait for previous packet to finish
|
||||
while(ssd1306_i2c_irq_state);
|
||||
|
||||
#ifdef IRQ_DIAG
|
||||
GPIOC->BSHR = (1<<(16+3));
|
||||
GPIOC->BSHR = (1<<(4));
|
||||
#endif
|
||||
|
||||
// init buffer for sending
|
||||
ssd1306_i2c_send_sz = sz;
|
||||
ssd1306_i2c_send_ptr = ssd1306_i2c_send_buffer;
|
||||
memcpy((uint8_t *)ssd1306_i2c_send_buffer, data, sz);
|
||||
|
||||
// wait for not busy
|
||||
timeout = TIMEOUT_MAX;
|
||||
while((I2C1->STAR2 & I2C_STAR2_BUSY) && (timeout--));
|
||||
if(timeout==-1)
|
||||
return ssd1306_i2c_error(0);
|
||||
|
||||
// Set START condition
|
||||
I2C1->CTLR1 |= I2C_CTLR1_START;
|
||||
|
||||
// wait for master mode select
|
||||
timeout = TIMEOUT_MAX;
|
||||
while((!ssd1306_i2c_chk_evt(SSD1306_I2C_EVENT_MASTER_MODE_SELECT)) && (timeout--));
|
||||
if(timeout==-1)
|
||||
return ssd1306_i2c_error(1);
|
||||
|
||||
// send 7-bit address + write flag
|
||||
I2C1->DATAR = addr<<1;
|
||||
|
||||
// wait for transmit condition
|
||||
timeout = TIMEOUT_MAX;
|
||||
while((!ssd1306_i2c_chk_evt(SSD1306_I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED)) && (timeout--));
|
||||
if(timeout==-1)
|
||||
return ssd1306_i2c_error(2);
|
||||
|
||||
// Enable TXE interrupt
|
||||
I2C1->CTLR2 |= I2C_CTLR2_ITBUFEN | I2C_CTLR2_ITEVTEN;
|
||||
ssd1306_i2c_irq_state = 1;
|
||||
|
||||
#ifdef IRQ_DIAG
|
||||
GPIOC->BSHR = (1<<(16+4));
|
||||
#endif
|
||||
|
||||
// exit
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* IRQ handler for I2C events
|
||||
*/
|
||||
void I2C1_EV_IRQHandler(void) __attribute__((interrupt));
|
||||
void I2C1_EV_IRQHandler(void)
|
||||
{
|
||||
uint16_t STAR1, STAR2 __attribute__((unused));
|
||||
|
||||
#ifdef IRQ_DIAG
|
||||
GPIOC->BSHR = (1<<(4));
|
||||
#endif
|
||||
|
||||
// read status, clear any events
|
||||
STAR1 = I2C1->STAR1;
|
||||
STAR2 = I2C1->STAR2;
|
||||
|
||||
/* check for TXE */
|
||||
if(STAR1 & I2C_STAR1_TXE)
|
||||
{
|
||||
/* check for remaining data */
|
||||
if(ssd1306_i2c_send_sz--)
|
||||
I2C1->DATAR = *ssd1306_i2c_send_ptr++;
|
||||
|
||||
/* was that the last byte? */
|
||||
if(!ssd1306_i2c_send_sz)
|
||||
{
|
||||
// disable TXE interrupt
|
||||
I2C1->CTLR2 &= ~(I2C_CTLR2_ITBUFEN | I2C_CTLR2_ITEVTEN);
|
||||
|
||||
// reset IRQ state
|
||||
ssd1306_i2c_irq_state = 0;
|
||||
|
||||
// wait for tx complete
|
||||
while(!ssd1306_i2c_chk_evt(SSD1306_I2C_EVENT_MASTER_BYTE_TRANSMITTED));
|
||||
|
||||
// set STOP condition
|
||||
I2C1->CTLR1 |= I2C_CTLR1_STOP;
|
||||
}
|
||||
}
|
||||
|
||||
#ifdef IRQ_DIAG
|
||||
GPIOC->BSHR = (1<<(16+4));
|
||||
#endif
|
||||
}
|
||||
#else
|
||||
/*
|
||||
* low-level packet send for blocking polled operation via i2c
|
||||
*/
|
||||
uint8_t ssd1306_i2c_send(uint8_t addr, uint8_t *data, uint8_t sz)
|
||||
{
|
||||
int32_t timeout;
|
||||
|
||||
// wait for not busy
|
||||
timeout = TIMEOUT_MAX;
|
||||
while((I2C1->STAR2 & I2C_STAR2_BUSY) && (timeout--));
|
||||
if(timeout==-1)
|
||||
return ssd1306_i2c_error(0);
|
||||
|
||||
// Set START condition
|
||||
I2C1->CTLR1 |= I2C_CTLR1_START;
|
||||
|
||||
// wait for master mode select
|
||||
timeout = TIMEOUT_MAX;
|
||||
while((!ssd1306_i2c_chk_evt(SSD1306_I2C_EVENT_MASTER_MODE_SELECT)) && (timeout--));
|
||||
if(timeout==-1)
|
||||
return ssd1306_i2c_error(1);
|
||||
|
||||
// send 7-bit address + write flag
|
||||
I2C1->DATAR = addr<<1;
|
||||
|
||||
// wait for transmit condition
|
||||
timeout = TIMEOUT_MAX;
|
||||
while((!ssd1306_i2c_chk_evt(SSD1306_I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED)) && (timeout--));
|
||||
if(timeout==-1)
|
||||
return ssd1306_i2c_error(2);
|
||||
|
||||
// send data one byte at a time
|
||||
while(sz--)
|
||||
{
|
||||
// wait for TX Empty
|
||||
timeout = TIMEOUT_MAX;
|
||||
while(!(I2C1->STAR1 & I2C_STAR1_TXE) && (timeout--));
|
||||
if(timeout==-1)
|
||||
return ssd1306_i2c_error(3);
|
||||
|
||||
// send command
|
||||
I2C1->DATAR = *data++;
|
||||
}
|
||||
|
||||
// wait for tx complete
|
||||
timeout = TIMEOUT_MAX;
|
||||
while((!ssd1306_i2c_chk_evt(SSD1306_I2C_EVENT_MASTER_BYTE_TRANSMITTED)) && (timeout--));
|
||||
if(timeout==-1)
|
||||
return ssd1306_i2c_error(4);
|
||||
|
||||
// set STOP condition
|
||||
I2C1->CTLR1 |= I2C_CTLR1_STOP;
|
||||
|
||||
// we're happy
|
||||
return 0;
|
||||
}
|
||||
#endif
|
||||
|
||||
/*
|
||||
* high-level packet send for I2C
|
||||
*/
|
||||
uint8_t ssd1306_pkt_send(uint8_t *data, uint8_t sz, uint8_t cmd)
|
||||
{
|
||||
uint8_t pkt[33];
|
||||
|
||||
/* build command or data packets */
|
||||
if(cmd)
|
||||
{
|
||||
pkt[0] = 0;
|
||||
pkt[1] = *data;
|
||||
}
|
||||
else
|
||||
{
|
||||
pkt[0] = 0x40;
|
||||
memcpy(&pkt[1], data, sz);
|
||||
}
|
||||
return ssd1306_i2c_send(SSD1306_I2C_ADDR, pkt, sz+1);
|
||||
}
|
||||
|
||||
/*
|
||||
* init I2C and GPIO
|
||||
*/
|
||||
uint8_t ssd1306_i2c_init(void)
|
||||
{
|
||||
// Enable GPIOC and I2C
|
||||
RCC->APB1PCENR |= RCC_APB1Periph_I2C1;
|
||||
|
||||
#ifdef CH32V20x
|
||||
RCC->APB2PCENR |= RCC_APB2Periph_GPIOB;
|
||||
// PB7 is SDA, 10MHz Output, alt func, open-drain
|
||||
GPIOB->CFGLR &= ~(0xf<<(4*7));
|
||||
GPIOB->CFGLR |= (GPIO_Speed_10MHz | GPIO_CNF_OUT_OD_AF)<<(4*7);
|
||||
|
||||
// PB6 is SCL, 10MHz Output, alt func, open-drain
|
||||
GPIOB->CFGLR &= ~(0xf<<(4*6));
|
||||
GPIOB->CFGLR |= (GPIO_Speed_10MHz | GPIO_CNF_OUT_OD_AF)<<(4*6);
|
||||
#else
|
||||
RCC->APB2PCENR |= RCC_APB2Periph_GPIOC;
|
||||
// PC1 is SDA, 10MHz Output, alt func, open-drain
|
||||
GPIOC->CFGLR &= ~(0xf<<(4*1));
|
||||
GPIOC->CFGLR |= (GPIO_Speed_10MHz | GPIO_CNF_OUT_OD_AF)<<(4*1);
|
||||
|
||||
// PC2 is SCL, 10MHz Output, alt func, open-drain
|
||||
GPIOC->CFGLR &= ~(0xf<<(4*2));
|
||||
GPIOC->CFGLR |= (GPIO_Speed_10MHz | GPIO_CNF_OUT_OD_AF)<<(4*2);
|
||||
#endif
|
||||
|
||||
#ifdef IRQ_DIAG
|
||||
// GPIO diags on PC3/PC4
|
||||
GPIOC->CFGLR &= ~(0xf<<(4*3));
|
||||
GPIOC->CFGLR |= (GPIO_Speed_10MHz | GPIO_CNF_OUT_PP)<<(4*3);
|
||||
GPIOC->BSHR = (1<<(16+3));
|
||||
GPIOC->CFGLR &= ~(0xf<<(4*4));
|
||||
GPIOC->CFGLR |= (GPIO_Speed_10MHz | GPIO_CNF_OUT_PP)<<(4*4);
|
||||
GPIOC->BSHR = (1<<(16+4));
|
||||
#endif
|
||||
|
||||
// load I2C regs
|
||||
ssd1306_i2c_setup();
|
||||
|
||||
#if 0
|
||||
// test if SSD1306 is on the bus by sending display off command
|
||||
uint8_t command = 0xAF;
|
||||
return ssd1306_pkt_send(&command, 1, 1);
|
||||
#else
|
||||
return 0;
|
||||
#endif
|
||||
}
|
||||
|
||||
/*
|
||||
* reset is not used for SSD1306 I2C interface
|
||||
*/
|
||||
void ssd1306_rst(void)
|
||||
{
|
||||
}
|
||||
#endif
|
||||
Reference in New Issue
Block a user