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cnlohr
2024-05-18 21:03:15 -07:00
parent 00a389078d
commit 794a43b64d
1 changed files with 11 additions and 12 deletions
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ch32v/ch32v003-timer/loratest.c
+11 -12
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@@ -319,9 +319,9 @@ skipreset:\n\
}
*/
}
void LoopFunction2() __attribute__((section(".srodata"))) __attribute__ ((noinline));
void LoopFunction2() __attribute__((aligned(256))) __attribute__((section(".srodata"))) __attribute__ ((noinline));
__attribute__((section(".sdata"))) const uint32_t tablef[] = {
__attribute__((section(".sdata"))) __attribute__((aligned(256))) const uint32_t tablef[] = {
0x09090909,
0x0909090a,
0x090a090a,
@@ -347,29 +347,28 @@ void LoopFunction2()
uint32_t * start = (uint8_t*)DMA1_Channel2->MADDR;
uint32_t * end = (uint8_t*)((uint32_t)DMA1_Channel2->MADDR + SENDBUFF_WORDS);
uint32_t * here = start;
uint32_t targ = 2000;
int run_f = 0;
volatile uint32_t * cntrptr = &DMA1_Channel2->CNTR;
while(1)
{
//
uint32_t * tail = 0xfffffffc & (uintptr_t)(((uint8_t*)end) - DMA1_Channel2->CNTR);
if( tail == end ) tail--;
//uint32_t * tail = 0xfffffffc & (uintptr_t)(((uint8_t*)end) - *cntrptr);
//if( tail == end ) tail--;
uint32_t * tail = ((SENDBUFF_WORDS-1) & (0xfffffffc)) & (uintptr_t)(((uint8_t*)start) + SENDBUFF_WORDS - *cntrptr);
while( here != tail )
{
uint32_t cp = ((SysTick->CNT>>12)&0x1fff);
*(here++) = tablef[run_f>>13];
run_f &= 8191;
uint32_t cp = ((SysTick->CNT>>14)&0xfff)+0x4000;
*(here++) = tablef[run_f>>12];
run_f &= 4095;
run_f += cp;
if( here == end )
here = start;
}
}
}
@@ -452,7 +451,7 @@ int main()
TIM1->CHCTLR1 = TIM_OC1M_2 | TIM_OC1M_1;
// Set the Capture Compare Register value to 50% initially
TIM1->CH3CVR = 3;
TIM1->CH3CVR = 4;
TIM1->CH1CVR = 0; // This triggers DMA.
// Enable TIM1 outputs