Posted on February 28, 2014 at 12:50Hi,
I have noticed that anything related to ADC3 interrupts is missing in the
STM32F10x_StdPeriph_Driver. Since the RM contains information about it, I added the needed ADC3 interrupt routine and enum value to the library but no interrupt occurs. I'm suspecting that some issue might exist with ADC3 interrupts and I hope someone can help.
I have tried to change the startup_stm32f10x_md_vl.s to contain:
...
.word RTCAlarm_IRQHandler
.word CEC_IRQHandler
.word 0
.word 0
.word 0
.word 0
.word ADC3_IRQHandler
.word 0
...
.weak ADC3_IRQHandler
.thumb_set ADC3_IRQHandler,Default_Handler
...
I put a breakpoint into the default handler but it doesn't get stuck there.
The ADC1 I'm using in parallel with the same configuration works fine though.
Here is the initialization code:
int32_t InitADC( void ) {
ADC_InitTypeDef ADC_InitStructure;
/* PCLK2 is the APB2 clock */
RCC_ADCCLKConfig(RCC_PCLK2_Div8);
/* Enable ADC1 clock so that we can talk to it */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC3, ENABLE);
// ADC 1
/* Put everything back to power-on defaults */
ADC_DeInit(ADC1);
ADC_StructInit(&ADC_InitStructure);
ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
/* Disable the scan conversion so we do one at a time */
ADC_InitStructure.ADC_ScanConvMode = DISABLE;
/* Don't do continuous conversions - do them on demand */
ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;
/* Start conversion by software, not an external trigger */
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;
/* Conversions are 12 bit - put them in the lower 12 bits of the result */
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
/* Say how many channels would be used by the sequencer */
ADC_InitStructure.ADC_NbrOfChannel = 1;
/* Now do the setup */
ADC_Init(ADC1, &ADC_InitStructure);
ADC_ITConfig(ADC1, ADC_IT_EOC, ENABLE);
ADC_RegularChannelConfig(ADC1,ADC_Channel_2,1,ADC_SampleTime_7Cycles5);
// ADC3
ADC_DeInit(ADC3);
ADC_StructInit(&ADC_InitStructure);
ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
/* Disable the scan conversion so we do one at a time */
ADC_InitStructure.ADC_ScanConvMode = DISABLE;
/* Don't do continuous conversions - do them on demand */
ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;
/* Start conversion by software, not an external trigger */
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;
/* Conversions are 12 bit - put them in the lower 12 bits of the result */
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
/* Say how many channels would be used by the sequencer */
ADC_InitStructure.ADC_NbrOfChannel = 1;
/* Now do the setup */
ADC_Init(ADC3, &ADC_InitStructure);
ADC_ITConfig(ADC3, ADC_IT_EOC, ENABLE);
ADC_RegularChannelConfig(ADC3,ADC_Channel_9,1,ADC_SampleTime_7Cycles5);
/* Enable ADC1 */
ADC_Cmd(ADC1, ENABLE);
/* Enable ADC3 */
ADC_Cmd(ADC3, ENABLE);
/* Enable ADC1 reset calibaration register */
ADC_ResetCalibration(ADC1);
/* Check the end of ADC1 reset calibration register */
while( ADC_GetResetCalibrationStatus(ADC1) ){
}
/* Start ADC1 calibaration */
ADC_StartCalibration(ADC1);
/* Check the end of ADC1 calibration */
while( ADC_GetCalibrationStatus(ADC1) ) {
}
/* Enable ADC3 reset calibaration register */
ADC_ResetCalibration(ADC3);
/* Check the end of ADC3 reset calibration register */
while( ADC_GetResetCalibrationStatus(ADC3) ){
}
/* Start ADC3 calibaration */
ADC_StartCalibration(ADC3);
/* Check the end of ADC3 calibration */
while( ADC_GetCalibrationStatus(ADC3) ) {
}
// TODO: consider timeouts for calibration waits
ADC_SoftwareStartConvCmd(ADC1,ENABLE);
ADC_SoftwareStartConvCmd(ADC3,ENABLE);
return 0;
}
uint16_t ADC1ConvertedValue=0;
uint16_t ADC3ConvertedValue=0;
void ADC1_IRQHandler(void) {
ADC_ClearITPendingBit(ADC1, ADC_IT_EOC);
ADC1ConvertedValue = ADC_GetConversionValue(ADC1);
}
void ADC3_IRQHandler(void) {
ADC_ClearITPendingBit(ADC3, ADC_IT_EOC);
ADC3ConvertedValue = ADC_GetConversionValue(ADC3);
}
