Posted on October 26, 2014 at 15:40I work on ST-Microcontroller :STM8S003F3U6.
I try to use TIM1 as a trigger (TRGO) for ADC interrupt.
When I use the single pulse (TIM1_CR1_OPM=1) mode (on TIM1 counter overflow) everything seems to work well,
but when I change TIM1_CR1_OPM to ''0'' for counter's continuous work, the ADC interrupt stops working.
TIM1 no longer launch ADC at the TIM1-counter overflow.
I need TIM1-counter work continuously and start ADC at every TIM1-counter overflow.
I don’t understand what am I doing wrong?
the relevant parts of my code:
//*******ADC + TIM1** init ******************************/
//********************************************************/
ADC_CSR_EOC=0;
ADC_CR1_ADON=0; // power OFF ADC
ADC_CR1_SPSEL=ADCPS; // sampling rate
ADC_CR2_ALIGN=1; // right align
ADC_CSR_CH=4; // point to channel
ADC_CR2_EXTSEL=0; //Internal TIM1 TRGO event
ADC_CR2_EXTTRIG=1; //Conversion on external event disabled
ADC_CSR_EOCIE=1; //end of conversion interrupt enable
TIM1_PSCRH=0x00; // set prescaler
TIM1_PSCRL=0x10; // 1MHz
TIM1_ARRH=0x00; //00 // set irq reriod
TIM1_ARRL=0x08;
TIM1_CR1_URS=TRUE; //gen timer irq on overflow only
TIM1_IER_TIE=1; //enable TRIG irq
TIM1_CR2_MMS=0x01; //enable master mode
TIM1_CR1_OPM=0; //
Counter is not stopped at update event
ADC_CR1_ADON=1;
__enable_interrupt();
/********************************************************/
/* MAIN */
/********************************************************/
void main(void)
{
TIM1_CR1_CEN=TRUE; //enable Timer1 counter
/* Loops 'forever', taking input when interrupted. */
while (1)
{ }
}
/***********************************************************************/
/* Defines an interrupt handler for the ADC vector */
/***********************************************************************/
#pragma vector=ADC_VECTOR
__interrupt __root void ADCHandler(void)
{
while (ADC_CSR_EOC==0) {}
ADC_CSR_EOC=0; //End of conversion
TIM1_SR1_UIF=0; // rset pending irq
}
Help!!
