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Add ADC bind method to the STM32 ADC drivers

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This commit is contained in:
Gregory Nutt 2016-05-26 12:25:54 -06:00
parent 2f5221ed91
commit 8f2a660c8b
1 changed files with 38 additions and 8 deletions
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46
arch/arm/src/stm32/stm32_adc.c
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@ -272,6 +272,7 @@
struct stm32_dev_s
{
FAR const struct adc_callback_s *cb;
uint8_t irq; /* Interrupt generated by this ADC block */
uint8_t nchannels; /* Number of channels */
uint8_t cchannels; /* Number of configured channels */
@ -364,6 +365,8 @@ static int adc123_interrupt(int irq, FAR void *context);
/* ADC Driver Methods */
static int adc_bind(FAR struct adc_dev_s *dev,
FAR const struct adc_callback_s *callback);
static void adc_reset(FAR struct adc_dev_s *dev);
static int adc_setup(FAR struct adc_dev_s *dev);
static void adc_shutdown(FAR struct adc_dev_s *dev);
@ -412,6 +415,7 @@ static void adc_startconv(FAR struct stm32_dev_s *priv, bool enable);
static const struct adc_ops_s g_adcops =
{
.ao_bind = adc_bind,
#if defined(CONFIG_STM32_STM32L15XX) && \
(STM32_CFGR_PLLSRC != 0 || STM32_SYSCLK_SW != RCC_CFGR_SW_HSI)
.ao_reset = adc_reset_hsi_disable,
@ -1660,6 +1664,25 @@ static void adc_dmaconvcallback(DMA_HANDLE handle, uint8_t isr, FAR void *arg)
}
#endif
/****************************************************************************
* Name: adc_bind
*
* Description:
* Bind the upper-half driver callbacks to the lower-half implementation. This
* must be called early in order to receive ADC event notifications.
*
****************************************************************************/
static int adc_bind(FAR struct adc_dev_s *dev,
FAR const struct adc_callback_s *callback)
{
FAR struct stm32_dev_s *priv = (FAR struct stm32_dev_s *)dev->ad_priv;
DEBUGASSERT(priv != NULL);
priv->cb = callback;
return OK;
}
/****************************************************************************
* Name: adc_reset
*
@ -2702,15 +2725,21 @@ static int adc_interrupt(FAR struct adc_dev_s *dev)
data = adc_getreg(priv, STM32_ADC_DR_OFFSET) & ADC_DR_RDATA_MASK;
/* Give the ADC data to the ADC driver. adc_receive() accepts 3
* parameters:
*
* 1) The first is the ADC device instance for this ADC block.
* 2) The second is the channel number for the data, and
* 3) The third is the converted data for the channel.
*/
/* Verify that the upper-half driver has bound its callback functions */
adc_receive(dev, priv->chanlist[priv->current], data);
if (priv->cb != NULL)
{
/* Give the ADC data to the ADC driver. The ADC receive() method
* accepts 3 parameters:
*
* 1) The first is the ADC device instance for this ADC block.
* 2) The second is the channel number for the data, and
* 3) The third is the converted data for the channel.
*/
DEBUGASSERT(priv->cb->au_receive != NULL);
priv->cb->au_receive(dev, priv->chanlist[priv->current], data);
}
/* Set the channel number of the next channel that will complete
* conversion.
@ -2995,6 +3024,7 @@ struct adc_dev_s *stm32_adcinitialize(int intf, FAR const uint8_t *chanlist,
DEBUGASSERT(cchannels <= ADC_MAX_SAMPLES);
priv->cb = NULL;
priv->cchannels = cchannels;
memcpy(priv->chanlist, chanlist, cchannels);