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Some simple changes to allow for Proshot (Another digital protocol).

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This commit is contained in:
TonyBazz 2017-05-28 02:30:33 +10:00
parent 51f607fdfc
commit b4d2388103
4 changed files with 114 additions and 33 deletions
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45
src/main/drivers/pwm_output_dshot.c
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@ -54,13 +54,8 @@ uint8_t getTimerIndex(TIM_TypeDef *timer)
return dmaMotorTimerCount-1;
}
void pwmWriteDigital(uint8_t index, uint16_t value)
void pwmWriteDshot(uint8_t index, uint16_t value)
{
if (!pwmMotorsEnabled) {
return;
}
motorDmaOutput_t * const motor = &dmaMotors[index];
if (!motor->timerHardware || !motor->timerHardware->dmaRef) {
@ -86,7 +81,39 @@ void pwmWriteDigital(uint8_t index, uint16_t value)
packet <<= 1;
}
DMA_SetCurrDataCounter(motor->timerHardware->dmaRef, MOTOR_DMA_BUFFER_SIZE);
DMA_SetCurrDataCounter(motor->timerHardware->dmaRef, DSHOT_DMA_BUFFER_SIZE);
DMA_Cmd(motor->timerHardware->dmaRef, ENABLE);
}
void pwmWriteProShot(uint8_t index, uint16_t value)
{
motorDmaOutput_t * const motor = &dmaMotors[index];
if (!motor->timerHardware || !motor->timerHardware->dmaRef) {
return;
}
uint16_t packet = (value << 1) | (motor->requestTelemetry ? 1 : 0);
motor->requestTelemetry = false; // reset telemetry request to make sure it's triggered only once in a row
// compute checksum
int csum = 0;
int csum_data = packet;
for (int i = 0; i < 3; i++) {
csum ^= csum_data; // xor data by nibbles
csum_data >>= 4;
}
csum &= 0xf;
// append checksum
packet = (packet << 4) | csum;
// generate pulses for Proshot
for (int i = 0; i < 4; i++) {
motor->dmaBuffer[i] = PROSHOT_BASE_SYMBOL + ((packet & 0xF000) >> 12) * PROSHOT_BIT_WIDTH; // Most significant nibble first
packet <<= 4; // Shift 4 bits
}
DMA_SetCurrDataCounter(motor->timerHardware->dmaRef, PROSHOT_DMA_BUFFER_SIZE);
DMA_Cmd(motor->timerHardware->dmaRef, ENABLE);
}
@ -139,7 +166,7 @@ void pwmDigitalMotorHardwareConfig(const timerHardware_t *timerHardware, uint8_t
TIM_Cmd(timer, DISABLE);
TIM_TimeBaseStructure.TIM_Prescaler = (uint16_t)((timerClock(timer) / getDshotHz(pwmProtocolType)) - 1);
TIM_TimeBaseStructure.TIM_Period = MOTOR_BITLENGTH;
TIM_TimeBaseStructure.TIM_Period = pwmProtocolType == PWM_TYPE_PROSHOT1000 ? MOTOR_NIBBLE_LENGTH_PROSHOT : MOTOR_BITLENGTH;
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseStructure.TIM_RepetitionCounter = 0;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
@ -205,7 +232,7 @@ void pwmDigitalMotorHardwareConfig(const timerHardware_t *timerHardware, uint8_t
DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;
#endif
DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)timerChCCR(timerHardware);
DMA_InitStructure.DMA_BufferSize = MOTOR_DMA_BUFFER_SIZE;
DMA_InitStructure.DMA_BufferSize = pwmProtocolType == PWM_TYPE_PROSHOT1000 ? PROSHOT_DMA_BUFFER_SIZE : DSHOT_DMA_BUFFER_SIZE;
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Word;