Posted on September 30, 2016 at 18:28&sharpdefine SAMPLESDAC (1024*2)
static TIM_HandleTypeDef Timer4Handle;
void Timer4_init()
{
TIM_ClockConfigTypeDef TimerClockConfig;
TIM_MasterConfigTypeDef sMasterConfig;
__TIM4_CLK_ENABLE();
//Timer init
Timer4Handle.Instance = (TIM_TypeDef *)TIM4;
Timer4Handle.Init.Prescaler = 0;
Timer4Handle.Init.CounterMode = TIM_COUNTERMODE_UP;
Timer4Handle.Init.Period = 108;
Timer4Handle.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
//Timer4Handle.Init.RepetitionCounter = 0;
//Timer4Handle.Channel = HAL_TIM_ACTIVE_CHANNEL_1;
//Timer4Handle.hdma[0] = &DMA_ADC_Handle;
HAL_TIM_Base_Init(&Timer4Handle);
TimerClockConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL;
HAL_TIM_ConfigClockSource(&Timer4Handle,&TimerClockConfig);
sMasterConfig.MasterOutputTrigger = TIM_TRGO_UPDATE;
sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
HAL_TIMEx_MasterConfigSynchronization(&Timer4Handle, &sMasterConfig);
//HAL_TIM_Base_Start(&Timer4Handle);
HAL_TIM_Base_Start_IT(&Timer4Handle);
}
static DMA_HandleTypeDef DMA_DAC_Handle;
static DAC_HandleTypeDef DacHandle;
void dac_init()
{
// we assume AnalogIn has configureed GPIO, we need ADC channel ?
__DAC_CLK_ENABLE(); // Enable ADC clock
// Configure ADC
DacHandle.Instance = (DAC_TypeDef *)DAC;
//DacHandle.DMA_Handle1 =&DMA_DAC_Handle;
HAL_DAC_Init(&DacHandle);
}
void dma_dac_init()
{
// DMA init ADC1 is DMA2 channel0 stream 0 or 4 use DMA2_Stream0 thd
__DMA1_CLK_ENABLE();
DMA_DAC_Handle.Instance = DMA1_Stream6;
//DMA_DAC_Handle.State = HAL_DMA_STATE_READY;
//HAL_DMA_DeInit(&DMA_DAC_Handle);
DMA_DAC_Handle.Init.Channel = DMA_CHANNEL_7;
DMA_DAC_Handle.Init.Direction = DMA_MEMORY_TO_PERIPH;
DMA_DAC_Handle.Init.PeriphInc = DMA_PINC_DISABLE;
DMA_DAC_Handle.Init.MemInc = DMA_MINC_ENABLE;
DMA_DAC_Handle.Init.PeriphDataAlignment = DMA_PDATAALIGN_HALFWORD;
DMA_DAC_Handle.Init.MemDataAlignment = DMA_MDATAALIGN_HALFWORD;
DMA_DAC_Handle.Init.Mode = DMA_CIRCULAR;
DMA_DAC_Handle.Init.Priority = DMA_PRIORITY_VERY_HIGH;
DMA_DAC_Handle.Init.FIFOMode = DMA_FIFOMODE_DISABLE;
DMA_DAC_Handle.Init.FIFOThreshold = DMA_FIFO_THRESHOLD_FULL;
DMA_DAC_Handle.Init.MemBurst = DMA_MBURST_SINGLE;
DMA_DAC_Handle.Init.PeriphBurst = DMA_PBURST_SINGLE;
HAL_DMA_Init(&DMA_DAC_Handle);
__HAL_LINKDMA(&DacHandle, DMA_Handle2, DMA_DAC_Handle);
}
void dac_readn( uint16_t * data, uint32_t nelems)
{
DAC_ChannelConfTypeDef sConfig;
sConfig.DAC_Trigger = DAC_TRIGGER_T4_TRGO; // Timer6 as triger
sConfig.DAC_OutputBuffer = DAC_OUTPUTBUFFER_ENABLE;
HAL_DAC_ConfigChannel(&DacHandle, &sConfig, DAC_CHANNEL_2);
HAL_DAC_Start_DMA(&DacHandle, DAC_CHANNEL_2, (uint32_t *)data, nelems, DAC_ALIGN_12B_R);
//while (DMA_DAC_Handle.Instance->CR & DMA_SxCR_EN); // spin
//HAL_DAC_Stop_DMA(&DacHandle,DAC_CHANNEL_1);
}
void SawToothWave()
{
int i = 0;
for(; i <= SAMPLESDAC; i ++) {
DAC_Val[i]=1024+i;
//DAC_Val[i]=2048;
}
}
#dac-bug
