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Code Issues Wiki Activity

Use striding loadDmaBuffer to avoid buffer copy

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This commit is contained in:
jflyper 2017-12-23 02:52:01 +09:00
parent 809a7d6b41
commit 9f04705130
5 changed files with 17 additions and 21 deletions
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12
src/main/drivers/pwm_output_dshot.c
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@ -71,19 +71,13 @@ void pwmWriteDshotInt(uint8_t index, uint16_t value)
#endif
uint16_t packet = prepareDshotPacket(motor, value);
// XXX Replace this with striding loader in the next refactor
uint8_t bufferSize = loadDmaBuffer(motor, packet);
uint8_t bufferSize;
#ifdef USE_DSHOT_DMAR
// Load channel data into burst buffer
uint8_t channelIndex = timerLookupChannelIndex(motor->timerHardware->channel);
// XXX This copy will be deleted once the striding loader is available
for (int i = 0; i < bufferSize; i++) {
motor->timer->dmaBurstBuffer[channelIndex + i * 4] = motor->dmaBuffer[i];
}
bufferSize = loadDmaBuffer(&motor->timer->dmaBurstBuffer[timerLookupChannelIndex(motor->timerHardware->channel)], 4, packet);
motor->timer->dmaBurstLength = bufferSize * 4;
#else
bufferSize = loadDmaBuffer(motor->dmaBuffer, 1, packet);
motor->timer->timerDmaSources |= motor->timerDmaSource;
DMA_SetCurrDataCounter(motor->timerHardware->dmaRef, bufferSize);
DMA_Cmd(motor->timerHardware->dmaRef, ENABLE);