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Various ADC fixes, not tested yet. 

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@4997 35acf78f-673a-0410-8e92-d51de3d6d3f4
This commit is contained in:
gdisirio 2012-12-30 13:20:06 +00:00
parent 354300b734
commit 0403ccfd10
2 changed files with 46 additions and 40 deletions
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38
os/hal/platforms/STM32F3xx/adc_lld.c
View File

@ -461,35 +461,43 @@ void adc_lld_stop(ADCDriver *adcp) {
* @notapi * @notapi
*/ */
void adc_lld_start_conversion(ADCDriver *adcp) { void adc_lld_start_conversion(ADCDriver *adcp) {
uint32_t mode, ccr; uint32_t dmamode, ccr, cfgr;
const ADCConversionGroup *grpp = adcp->grpp; const ADCConversionGroup *grpp = adcp->grpp;
chDbgAssert(!STM32_ADC_DUAL_MODE || ((grpp->num_channels & 1) == 0), chDbgAssert(!STM32_ADC_DUAL_MODE || ((grpp->num_channels & 1) == 0),
"adc_lld_start_conversion(), #1", "adc_lld_start_conversion(), #1",
"odd number of channels in dual mode"); "odd number of channels in dual mode");
/* DMA setup.*/ /* Calculating control registers values.*/
mode = adcp->dmamode; dmamode = adcp->dmamode;
ccr = grpp->ccr | (adcp->adcc->CCR & (ADC_CCR_CKMODE_MASK |
ADC_CCR_MDMA_MASK));
cfgr = grpp->cfgr;
if (grpp->circular) { if (grpp->circular) {
mode |= STM32_DMA_CR_CIRC; dmamode |= STM32_DMA_CR_CIRC;
#if STM32_ADC_DUAL_MODE
ccr |= ADC_CCR_DMACFG_CIRCULAR;
cfgr |= ADC_CFGR_CONT;
#else
cfgr |= ADC_CFGR_CONT | ADC_CFGR_DMACFG | ADC_CFGR_DMAEN;
#endif
} }
/* DMA setup.*/
if (adcp->depth > 1) { if (adcp->depth > 1) {
/* If the buffer depth is greater than one then the half transfer interrupt /* If the buffer depth is greater than one then the half transfer interrupt
interrupt is enabled in order to allows streaming processing.*/ interrupt is enabled in order to allows streaming processing.*/
mode |= STM32_DMA_CR_HTIE; dmamode |= STM32_DMA_CR_HTIE;
} }
dmaStreamSetMemory0(adcp->dmastp, adcp->samples); dmaStreamSetMemory0(adcp->dmastp, adcp->samples);
dmaStreamSetTransactionSize(adcp->dmastp, (uint32_t)grpp->num_channels * dmaStreamSetTransactionSize(adcp->dmastp, (uint32_t)grpp->num_channels *
(uint32_t)adcp->depth); (uint32_t)adcp->depth);
dmaStreamSetMode(adcp->dmastp, mode); dmaStreamSetMode(adcp->dmastp, dmamode);
dmaStreamEnable(adcp->dmastp); dmaStreamEnable(adcp->dmastp);
/* Configuring the CCR register with the static settings ORed with /* Configuring the CCR register with the static settings ORed with
the user-specified settings in the conversion group configuration the user-specified settings in the conversion group configuration
structure.*/ structure.*/
ccr = STM32_ADC_ADC12_CLOCK_MODE | ADC_DMA_MDMA | grpp->ccr;
if (grpp->circular)
ccr |= ADC_CCR_DMACFG_CIRCULAR;
adcp->adcc->CCR = ccr; adcp->adcc->CCR = ccr;
/* ADC setup, if it is defined a callback for the analog watch dog then it /* ADC setup, if it is defined a callback for the analog watch dog then it
@ -511,23 +519,17 @@ void adc_lld_start_conversion(ADCDriver *adcp) {
adcp->adcs->SQR3 = grpp->ssqr[2]; adcp->adcs->SQR3 = grpp->ssqr[2];
adcp->adcs->SQR4 = grpp->ssqr[3]; adcp->adcs->SQR4 = grpp->ssqr[3];
/* ADC configuration, note some bits are shared between master and slave, #else /* !STM32_ADC_DUAL_MODE */
here we write everything in the slave too for code simplicity not
because it is required.*/
adcp->adcm->CFGR = adcp->adcs->CFGR = grpp->cfgr | ADC_CFGR_CONT;
#else
adcp->adcm->SMPR1 = grpp->smpr[0]; adcp->adcm->SMPR1 = grpp->smpr[0];
adcp->adcm->SMPR2 = grpp->smpr[1]; adcp->adcm->SMPR2 = grpp->smpr[1];
adcp->adcm->SQR1 = grpp->sqr[0] | ADC_SQR1_NUM_CH(grpp->num_channels); adcp->adcm->SQR1 = grpp->sqr[0] | ADC_SQR1_NUM_CH(grpp->num_channels);
adcp->adcm->SQR2 = grpp->sqr[1]; adcp->adcm->SQR2 = grpp->sqr[1];
adcp->adcm->SQR3 = grpp->sqr[2]; adcp->adcm->SQR3 = grpp->sqr[2];
adcp->adcm->SQR4 = grpp->sqr[3]; adcp->adcm->SQR4 = grpp->sqr[3];
#endif /* !STM32_ADC_DUAL_MODE */
/* ADC configuration.*/ /* ADC configuration.*/
adcp->adcm->CFGR = grpp->cfgr | ADC_CFGR_CONT | ADC_CFGR_DMACFG | adcp->adcm->CFGR = cfgr;
ADC_CFGR_DMAEN;
#endif
/* Starting conversion.*/ /* Starting conversion.*/
adcp->adcm->CR |= ADC_CR_ADSTART; adcp->adcm->CR |= ADC_CR_ADSTART;

4
os/hal/platforms/STM32F3xx/adc_lld.h
View File

@ -94,6 +94,10 @@
* @name CFGR register configuration helpers * @name CFGR register configuration helpers
* @{ * @{
*/ */
#define ADC_CFGR_DMACFG_MASK (1 << 1)
#define ADC_CFGR_DMACFG_ONESHOT (0 << 1)
#define ADC_CFGR_DMACFG_CIRCULAR (1 << 1)
#define ADC_CFGR_RES_MASK (3 << 3) #define ADC_CFGR_RES_MASK (3 << 3)
#define ADC_CFGR_RES_12BITS (0 << 3) #define ADC_CFGR_RES_12BITS (0 << 3)
#define ADC_CFGR_RES_10BITS (1 << 3) #define ADC_CFGR_RES_10BITS (1 << 3)