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/*
* Licensed under ST Liberty SW License Agreement V2, (the "License");
* You may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.st.com/software_license_agreement_liberty_v2
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* @file SPC5xx/EQADC_v1/adc_lld.c
* @brief SPC5xx low level ADC driver code.
*
* @addtogroup ADC
* @{
*/
#include "ch.h"
#include "hal.h"
#if HAL_USE_ADC || defined(__DOXYGEN__)
/*===========================================================================*/
/* Driver local definitions. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver exported variables. */
/*===========================================================================*/
/**
* @brief ADCD1 driver identifier.
*/
#if SPC5_ADC_USE_EQADC_Q0 || defined(__DOXYGEN__)
ADCDriver ADCD1;
#endif
/*===========================================================================*/
/* Driver local variables. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver local functions. */
/*===========================================================================*/
/**
* @brief Enables a CFIFO.
*
* @param[in] fifo the FIFO identifier
* @param[in] cfcr CFCR register value
* @param[in] idcr IDCR register value
*
* @notapi
*/
static void cfifo_enable(adcfifo_t fifo, uint16_t cfcr, uint16_t idcr) {
EQADC.CFCR[fifo].R = cfcr;
EQADC.IDCR[fifo].R = idcr;
}
/**
* @brief Disables a CFIFO and the associated resources.
*
* @param[in] fifo the FIFO identifier
*
* @notapi
*/
static void cfifo_disable(adcfifo_t fifo) {
/* Disables the CFIFO.*/
EQADC.CFCR[fifo].R = EQADC_CFCR_MODE_DISABLED;
/* Disables Interrupts and DMAs of the CFIFO.*/
EQADC.IDCR[fifo].R = 0;
/* Waits for the CFIFO to become idle.*/
while ((EQADC.CFSR.R & (0xC0000000 >> (fifo * 2))) != 0)
;
/* Invalidates the CFIFO.*/
EQADC.CFCR[fifo].R = EQADC_CFCR_CFINV | EQADC_CFCR_MODE_DISABLED;
/* Clears all Interrupts and eDMA flags for the CFIFO.*/
EQADC.FISR[fifo].R = EQADC_FISR_CLEAR_MASK;
/* Clears the Tx Count Registers for the CFIFO.*/
EQADC.CFTCR[fifo].R = 0;
}
/**
* @brief Pushes a command into the CFIFO0.
*
* @param[in] cmd the command
*
* @notapi
*/
static void cfifo0_push_command(adccommand_t cmd) {
while (EQADC.FISR[0].B.CFCTR >= 4)
;
EQADC.CFPR[0].R = cmd;
}
/**
* @brief Waits until the RFIFO0 contains the specified number of entries.
*
* @param[in] n number of entries
*
* @notapi
*/
static void cfifo0_wait_rfifo(uint32_t n) {
while (EQADC.FISR[0].B.RFCTR < n)
;
EQADC.FISR[0].R = EQADC_FISR_CLEAR_MASK;
}
/*===========================================================================*/
/* Driver interrupt handlers. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver exported functions. */
/*===========================================================================*/
/**
* @brief Low level ADC driver initialization.
*
* @notapi
*/
void adc_lld_init(void) {
#if SPC5_ADC_USE_EQADC_Q0
/* Driver initialization.*/
adcObjectInit(&ADCD1);
#endif /* SPC5_ADC_USE_EQADC_Q0 */
}
/**
* @brief Configures and activates the ADC peripheral.
*
* @param[in] adcp pointer to the @p ADCDriver object
*
* @notapi
*/
void adc_lld_start(ADCDriver *adcp) {
if (adcp->state == ADC_STOP) {
/* Enables the peripheral.*/
#if SPC5_ADC_USE_EQADC_Q0
if (&ADCD1 == adcp) {
}
#endif /* SPC5_ADC_USE_EQADC_Q0 */
}
/* Configures the peripheral.*/
}
/**
* @brief Deactivates the ADC peripheral.
*
* @param[in] adcp pointer to the @p ADCDriver object
*
* @notapi
*/
void adc_lld_stop(ADCDriver *adcp) {
if (adcp->state == ADC_READY) {
/* Resets the peripheral.*/
/* Disables the peripheral.*/
#if SPC5_ADC_USE_EQADC_Q0
if (&ADCD1 == adcp) {
}
#endif /* SPC5_ADC_USE_EQADC_Q0 */
}
}
/**
* @brief Starts an ADC conversion.
*
* @param[in] adcp pointer to the @p ADCDriver object
*
* @notapi
*/
void adc_lld_start_conversion(ADCDriver *adcp) {
(void)adcp;
}
/**
* @brief Stops an ongoing conversion.
*
* @param[in] adcp pointer to the @p ADCDriver object
*
* @notapi
*/
void adc_lld_stop_conversion(ADCDriver *adcp) {
(void)adcp;
}
#endif /* HAL_USE_ADC */
/** @} */
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