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Fix BCM comments

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This commit is contained in:
fruchti 2020-09-27 23:53:08 +02:00
parent 3a6c0a6391
commit f3edcd1c26
2 changed files with 3 additions and 3 deletions
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2
build-number.txt
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@ -1 +1 @@
513
515

4
src/led.c
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@ -144,7 +144,7 @@ static void LED_StartBCM(int row)
TIM3->ARR = LED_BitLengths[0];
TIM3->DIER = TIM_DIER_UDE | TIM_DIER_CC1DE;
// DMA channel 3: Output data to port a on TIM3 update
// DMA channel 3: output data to port a on TIM3 update event
DMA1_Channel3->CMAR = (uint32_t)&(LED_FrontBuffer[row * (LED_BITS + 1) + 4]);
// One transfer for each bit plus one to set the outputs to zero again.
// The first 4 are sent out with assembly before the first DMA transfer.
@ -153,7 +153,7 @@ static void LED_StartBCM(int row)
DMA1_Channel3->CCR = DMA_CCR_PL | DMA_CCR_MSIZE_0 | DMA_CCR_PSIZE_0
| DMA_CCR_MINC | DMA_CCR_DIR | DMA_CCR_EN | DMA_CCR_TCIE;
// DMA channel 3: Output data to port a on TIM3 update
// DMA channel 4: update TIM3 ARR on TIM3 compare 1 match
// The bit lengths table is offset because the first value is already in
// the timer's ARR shadow register.
DMA1_Channel4->CMAR = (uint32_t)&(LED_BitLengths[1]);