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STM32F4xx ADC Driver not working
Posted: Tue Feb 14, 2017 4:22 pm
by Tabulous
Start the ADC like this, trying to run in continuous conversion mode.
Code: Select all
static const ADCConversionGroup adcgrpcfg = {
TRUE,
ADC_GRP1_NUM_CHANNELS,
adcendcallback,
adcerrorcallback,
/* HW dependent part.*/
0,
ADC_CR2_SWSTART,
ADC_SMPR2_SMP_AN5(ADC_SAMPLE_56) |
ADC_SMPR2_SMP_AN6(ADC_SAMPLE_56) |
ADC_SMPR2_SMP_AN7(ADC_SAMPLE_56) |
ADC_SMPR2_SMP_AN8(ADC_SAMPLE_56) |
ADC_SMPR2_SMP_AN9(ADC_SAMPLE_56) ,
0,
ADC_SQR1_NUM_CH(ADC_GRP1_NUM_CHANNELS),
0,
ADC_SQR3_SQ1_N(ADC_CHANNEL_IN7) |
ADC_SQR3_SQ2_N(ADC_CHANNEL_IN8) |
ADC_SQR3_SQ3_N(ADC_CHANNEL_IN9) |
ADC_SQR3_SQ4_N(ADC_CHANNEL_IN5) |
ADC_SQR3_SQ5_N(ADC_CHANNEL_IN6) ,
};
void adcInit( void )
{
/*
* Initializes the ADC driver 1
*/
adcStart( &ADCD1, NULL );
adcStartConversion( &ADCD1,
&adcgrpcfg,
samples,
ADC_GRP1_BUF_DEPTH );
}
callbacks here
Code: Select all
/*
* ADC error conversion callback.
*/
static void adcerrorcallback(ADCDriver *adcp, adcerror_t err) {
(void)adcp;
(void)err;
}
/*
* ADC end conversion callback.
*/
void adcendcallback( ADCDriver *adcp, adcsample_t *buffer, size_t n )
{
(void) n;
(void)buffer;
/* Note, only in the ADC_COMPLETE state because the ADC driver fires an
intermediate callback when the buffer is half full.*/
if( adcp->state == ADC_COMPLETE )
{
}
}
When run the adcendcallback is continously called with adcp->state == ADC_ACTIVE
Nothing else in the system runs.
Re: STM32F4xx ADC Driver not working
Posted: Tue Feb 14, 2017 4:58 pm
by Giovanni
Hi.
Are you testing with optimizations disabled? if not, breakpoints could be ignored. Callbacks work in the ADC demos, loot at that code.
Giovanni
Re: STM32F4xx ADC Driver not working
Posted: Tue Feb 14, 2017 5:08 pm
by RoccoMarco
Actually, what makes me confused is this:
Code: Select all
void adcInit( void )
{
/*
* Initializes the ADC driver 1
*/
adcStart( &ADCD1, NULL );
adcStartConversion( &ADCD1,
&adcgrpcfg,
samples,
ADC_GRP1_BUF_DEPTH );
}
The ADC already has a function named adcInit(). You should receive an error compiling your code.
Re: STM32F4xx ADC Driver not working
Posted: Tue Feb 14, 2017 5:16 pm
by Tabulous
Giovanni wrote:Hi.
Are you testing with optimizations disabled? if not, breakpoints could be ignored. Callbacks work in the ADC demos, loot at that code.
Giovanni
I never develop with any optimisation enabled, everything is off -O0 and LTO is off.
Re: STM32F4xx ADC Driver not working
Posted: Tue Feb 14, 2017 5:17 pm
by Tabulous
RoccoMarco wrote:Actually, what makes me confused is this:
Code: Select all
void adcInit( void )
{
/*
* Initializes the ADC driver 1
*/
adcStart( &ADCD1, NULL );
adcStartConversion( &ADCD1,
&adcgrpcfg,
samples,
ADC_GRP1_BUF_DEPTH );
}
The ADC already has a function named adcInit(). You should receive an error compiling your code.
i changed that to help people understand, in the real code it is psuInit();
Re: STM32F4xx ADC Driver not working
Posted: Tue Feb 14, 2017 5:29 pm
by Tabulous
Note the ADC works if i run in single conversion mode and trigger it every second by calling
Code: Select all
adcStartConversion( &ADCD1,
&adcgrpcfg,
samples,
ADC_GRP1_BUF_DEPTH );
from a thread with one second sleep
Re: STM32F4xx ADC Driver not working
Posted: Tue Feb 14, 2017 6:04 pm
by Tabulous
Think i'm understanding the working of continuous mode wrong.
it runs all the time and you never get a ADC_COMPLETE state, this is where im going wrong
Re: STM32F4xx ADC Driver not working
Posted: Wed Feb 15, 2017 2:34 pm
by Giovanni
I forgot that detail too...
Giovanni