Hello,
this is the adc dma function content
void adc1_dma_config(void)
{
ADC_InitTypeDef ADC_InitStructure;
ADC_CommonInitTypeDef ADC_CommonInitStructure;
DMA_InitTypeDef DMA_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_2| GPIO_Pin_3;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ;
GPIO_Init(GPIOC, &GPIO_InitStructure);
DMA_Cmd(DMA2_Stream0, DISABLE);
DMA_DeInit(DMA2_Stream0);
DMA_InitStructure.DMA_Channel = DMA_Channel_0;
DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)ADC1_DR_ADDRESS;
DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)&ADCval[0];
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory; // get from ADC1 periph and store to memory in ADCval[x]
DMA_InitStructure.DMA_BufferSize = TOTAL_ADC_CHANNELS_FOR_DMA; // 8 memory locations
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable; // enable to increment from ADCval[0] to... ADCval[2]
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
DMA_InitStructure.DMA_Mode = DMA_Mode_Circular; // read ADC DR register continously and update the buffer values
DMA_InitStructure.DMA_Priority = DMA_Priority_High;
DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Disable;
DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_HalfFull;
DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single;
DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;
DMA_ITConfig(DMA2_Stream0, DMA_IT_TC, ENABLE); // enable transfer complete interupt
DMA_Init(DMA2_Stream0, &DMA_InitStructure);
// ADC_CommonInitStructure.ADC_Mode = ADC_Mode_Independent;
ADC_CommonInitStructure.ADC_Prescaler = ADC_Prescaler_Div2;
//ADC_CommonInitStructure.ADC_DMAAccessMode = ADC_DMAAccessMode_1;
// ADC_CommonInitStructure.ADC_TwoSamplingDelay = ADC_TwoSamplingDelay_5Cycles;
ADC_CommonInit(&ADC_CommonInitStructure);
ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;
ADC_InitStructure.ADC_ScanConvMode = ENABLE; // multi channel
ADC_InitStructure.ADC_ContinuousConvMode = DISABLE; //
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_T1_CC1; // trigger by timer1 CC1
ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_Rising;
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
ADC_InitStructure.ADC_NbrOfConversion = 3; //
ADC_Init(ADC1, &ADC_InitStructure);
ADC_RegularChannelConfig(ADC1, ADC_CHANNEL_CURRENT_W, 1, ADC_SampleTime_28Cycles);
ADC_RegularChannelConfig(ADC1, ADC_CHANNEL_CURRENT_V, 2, ADC_SampleTime_28Cycles );
ADC_RegularChannelConfig(ADC1, ADC_CHANNEL_CURRENT_U, 3, ADC_SampleTime_28Cycles );
ADC_DMARequestAfterLastTransferCmd(ADC1, ENABLE);
ADC_Cmd(ADC1, ENABLE);
ADC_DMACmd(ADC1, ENABLE);
DMA_Cmd(DMA2_Stream0, ENABLE);
}
This is the timer setup
void timer1_config(void){
GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
TIM_BDTRInitTypeDef TIM_BDTRInitStructure;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10|GPIO_Pin_9|GPIO_Pin_8;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_DOWN ;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_15|GPIO_Pin_14|GPIO_Pin_13;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_DOWN ;
GPIO_Init(GPIOB, &GPIO_InitStructure);
GPIO_PinAFConfig(GPIOA, GPIO_PinSource8, GPIO_AF_TIM1);
GPIO_PinAFConfig(GPIOA, GPIO_PinSource9, GPIO_AF_TIM1);
GPIO_PinAFConfig(GPIOA, GPIO_PinSource10, GPIO_AF_TIM1);
GPIO_PinAFConfig(GPIOB, GPIO_PinSource13, GPIO_AF_TIM1);
GPIO_PinAFConfig(GPIOB, GPIO_PinSource14, GPIO_AF_TIM1);
GPIO_PinAFConfig(GPIOB, GPIO_PinSource15, GPIO_AF_TIM1);
TIM_DeInit(TIM1);
TIM_InternalClockConfig(TIM1);
TIM_TimeBaseStructure.TIM_Prescaler = TIMER1_Prescaler_value;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_CenterAligned1;
TIM_TimeBaseStructure.TIM_Period = TIMER1_AutoReload_value; //arr
TIM_TimeBaseStructure.TIM_ClockDivision = 0;
TIM_TimeBaseStructure.TIM_RepetitionCounter = 0;
TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);
/* Channel 1 Configuration in PWM mode */
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;
TIM_OCInitStructure.TIM_Pulse = TIM1_DEFAULT_PWM_DUTYCYCLE;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCPolarity_High;
TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Reset;
TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCIdleState_Reset;
TIM_BDTRInitStructure.TIM_OSSRState = TIM_OSSRState_Enable;
TIM_BDTRInitStructure.TIM_OSSIState = TIM_OSSIState_Enable;
TIM_BDTRInitStructure.TIM_LOCKLevel = TIM_LOCKLevel_1;
TIM_BDTRInitStructure.TIM_DeadTime = 200;
TIM_BDTRInitStructure.TIM_Break = TIM_Break_Disable;
TIM_BDTRInitStructure.TIM_BreakPolarity = TIM_BreakPolarity_High;
TIM_BDTRInitStructure.TIM_AutomaticOutput = TIM_AutomaticOutput_Enable;
TIM_BDTRConfig(TIM1, &TIM_BDTRInitStructure);
TIM_OC1Init(TIM1, &TIM_OCInitStructure);
/* Select the Master Slave Mode */
TIM_SelectMasterSlaveMode(TIM1, TIM_MasterSlaveMode_Enable);
TIM_SelectSlaveMode(TIM1, TIM_SlaveMode_Reset);//
TIM_SelectOutputTrigger(TIM1, TIM_TRGOSource_OC1Ref);
TIM_Cmd(TIM1, ENABLE);
/* Main Output Enable */
TIM_CtrlPWMOutputs(TIM1, ENABLE);
}
And this is the main code
int main(void){
SystemInit();
SysTick_Config(SystemCoreClock / 1000);
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);
NVIC_InitStructure.NVIC_IRQChannel = SysTick_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
NVIC_InitStructure.NVIC_IRQChannel = DMA2_Stream0_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
RCC_ClocksTypeDef clocks;
RCC_GetClocksFreq(&clocks);
init_rcc_leds_clocks();
timer1_config();
adc1_dma_config();
while(1)
{
}
}
void DMA2_Stream0_IRQHandler(void){
if (DMA_GetITStatus(DMA2_Stream0, DMA_IT_TCIF0) != RESET)
{
GPIO_ResetBits(gpio_led_port,gpio_led2);
GPIO_SetBits(gpio_led_port,gpio_led2);
GPIO_SetBits(gpio_led_port,gpio_led2);
GPIO_ResetBits(gpio_led_port,gpio_led2);
DMA_ClearITPendingBit(DMA2_Stream0, DMA_IT_TCIF0);
}
}
void SysTick_Handler(void)
{
GPIO_SetBits(gpio_led_port,gpio_led1);
GPIO_ResetBits(gpio_led_port,gpio_led1);
}
i have done a little debuging last night and i noticed if i use optimization level to none -O0 the DMA IRQ does not run. The systick irq runs
But if set optimization level to -O3 the DMA TC IRQ runs
And i have another question, ADC EOC IRQ can run in the same time when using ADC DMA TC IRQ ?
