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Adds low level operations to start and stop DMA.

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This commit is contained in:
Daniel P. Carvalho 2023-09-27 14:11:51 -03:00 committed by Xiang Xiao
parent 8014f51cc1
commit e45e932a8a
2 changed files with 84 additions and 12 deletions
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63
arch/arm/src/stm32l4/stm32l4_adc.c
View File

@ -328,7 +328,11 @@ static int adc_llops_offset_set(struct stm32_adc_dev_s *dev,
uint8_t ch, uint8_t i, uint16_t offset);
# ifdef ADC_HAVE_DMA
static int adc_regbufregister(struct stm32_adc_dev_s *dev,
uint16_t *buffer, uint8_t len);
uint16_t *buffer, uint16_t len);
static void adc_llops_dma_start(struct stm32_adc_dev_s *adc,
dma_callback_t callback,
uint16_t *buffer, uint16_t len);
static void adc_llops_dma_stop(struct stm32_adc_dev_s *adc);
# endif
# ifdef ADC_HAVE_EXTCFG
static int adc_llops_extsel_set(struct stm32_adc_dev_s *dev,
@ -397,9 +401,6 @@ static const struct stm32_adc_ops_s g_adc_llops =
.val_get = adc_llops_regget,
.reg_startconv = adc_llops_startconv,
.offset_set = adc_llops_offset_set,
# ifdef ADC_HAVE_DMA
.regbuf_reg = adc_regbufregister,
# endif
# ifdef ADC_HAVE_INJECTED
.inj_get = adc_llops_injget,
.inj_startconv = adc_llops_inj_startconv,
@ -409,6 +410,11 @@ static const struct stm32_adc_ops_s g_adc_llops =
# endif
# ifdef ADC_HAVE_JEXTCFG
.jextsel_set = adc_llops_jextsel_set,
# endif
# ifdef ADC_HAVE_DMA
.regbuf_reg = adc_regbufregister,
.dma_start = adc_llops_dma_start,
.dma_stop = adc_llops_dma_stop,
# endif
.dump_regs = adc_llops_dumpregs
};
@ -2520,7 +2526,7 @@ static void adc_llops_jextsel_set(struct stm32_adc_dev_s *dev,
#ifdef ADC_HAVE_DMA
static int adc_regbufregister(struct stm32_adc_dev_s *dev,
uint16_t *buffer, uint8_t len)
uint16_t *buffer, uint16_t len)
{
struct stm32_dev_s *priv = (struct stm32_dev_s *)dev;
@ -2536,6 +2542,53 @@ static int adc_regbufregister(struct stm32_adc_dev_s *dev,
return OK;
}
/****************************************************************************
* Name: adc_llops_dma_start
****************************************************************************/
static void adc_llops_dma_start(struct stm32_adc_dev_s *adc,
dma_callback_t callback,
uint16_t *buffer, uint16_t len)
{
struct stm32_dev_s *dev = (struct stm32_dev_s *)adc;
/* Stop and free DMA if it was started before */
if (dev->dma != NULL)
{
stm32l4_dmastop(dev->dma);
stm32l4_dmafree(dev->dma);
}
dev->dma = stm32l4_dmachannel(dev->dmachan);
stm32l4_dmasetup(dev->dma,
dev->base + STM32L4_ADC_DR_OFFSET,
(uint32_t)buffer,
len,
ADC_DMA_CONTROL_WORD);
stm32l4_dmastart(dev->dma, callback, dev, false);
}
/****************************************************************************
* Name: adc_llops_dma_stop
****************************************************************************/
static void adc_llops_dma_stop(struct stm32_adc_dev_s *adc)
{
struct stm32_dev_s *dev = (struct stm32_dev_s *)adc;
/* Stop and free DMA */
if (dev->dma != NULL)
{
stm32l4_dmastop(dev->dma);
stm32l4_dmafree(dev->dma);
}
}
#endif /* ADC_HAVE_DMA */
/****************************************************************************

33
arch/arm/src/stm32l4/stm32l4_adc.h
View File

@ -29,6 +29,7 @@
#include <nuttx/analog/adc.h>
#include "chip.h"
#include "hardware/stm32l4_adc.h"
#include "stm32l4_dma.h"
/****************************************************************************
* Pre-processor Definitions
@ -458,8 +459,6 @@
(adc)->llops->val_get(adc)
#define ADC_INJDATA_GET(adc, chan) \
(adc)->llops->inj_get(adc, chan)
#define ADC_REGBUF_REGISTER(adc, buffer, len) \
(adc)->llops->regbuf_reg(adc, buffer, len)
#define ADC_REG_STARTCONV(adc, state) \
(adc)->llops->reg_startconv(adc, state)
#define ADC_INJ_STARTCONV(adc, state) \
@ -471,6 +470,15 @@
#define ADC_DUMP_REGS(adc) \
(adc)->llops->dump_regs(adc)
#ifdef ADC_HAVE_DMA
# define ADC_REGBUF_REGISTER(adc, buffer, len) \
(adc)->llops->regbuf_reg(adc, buffer, len)
# define ADC_DMA_START(adc, cb, buf, len) \
(adc)->llops->dma_start(adc, cb, buf, len)
# define ADC_DMA_STOP(adc) \
(adc)->llops->dma_stop(adc)
#endif
/* IOCTL Commands ***********************************************************
*
* Cmd: ANIOC_STM32L4_TRIGGER_REG Arg:
@ -524,11 +532,6 @@ struct stm32_adc_ops_s
uint32_t (*val_get)(struct stm32_adc_dev_s *dev);
/* Register buffer for ADC DMA transfer */
int (*regbuf_reg)(struct stm32_adc_dev_s *dev, uint16_t *buffer,
uint8_t len);
/* Start/stop regular conversion */
void (*reg_startconv)(struct stm32_adc_dev_s *dev, bool state);
@ -558,6 +561,22 @@ struct stm32_adc_ops_s
void (*inj_startconv)(struct stm32_adc_dev_s *dev, bool state);
#endif
#ifdef ADC_HAVE_DMA
/* Register buffer for ADC DMA transfer */
int (*regbuf_reg)(struct stm32_adc_dev_s *dev, uint16_t *buffer,
uint16_t len);
/* Start DMA */
void (*dma_start)(struct stm32_adc_dev_s *dev, dma_callback_t callback,
uint16_t *buffer, uint16_t len);
/* Stop DMA */
void (*dma_stop)(struct stm32_adc_dev_s *dev);
#endif
/* Dump ADC regs */
void (*dump_regs)(struct stm32_adc_dev_s *dev);