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analogout: STM32: Implemented analogout_free for STM32H7 series 

analogout_free implemented with multiple DAC channel usage check.
pull/14844/head
anish-k 2021-06-24 21:02:26 +05:30
parent c22331cc03
commit 59ba97f7b4
1 changed files with 47 additions and 0 deletions
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47
targets/TARGET_STM/TARGET_STM32H7/analogout_device.c
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@ -23,6 +23,12 @@
#include "stm32h7xx_hal.h"
#include "PeripheralPins.h"
// These variables are used for the "free" function
static int channel1_used = 0;
#if defined(DAC_CHANNEL_2)
static int channel2_used = 0;
#endif
void analogout_init(dac_t *obj, PinName pin)
{
DAC_ChannelConfTypeDef sConfig = {0};
@ -55,6 +61,9 @@ void analogout_init(dac_t *obj, PinName pin)
// Configure GPIO
pinmap_pinout(pin, PinMap_DAC);
// Save the pin for future use
obj->pin = pin;
__GPIOA_CLK_ENABLE();
__HAL_RCC_DAC12_CLK_ENABLE();
@ -73,12 +82,50 @@ void analogout_init(dac_t *obj, PinName pin)
error("HAL_DAC_ConfigChannel failed");
}
if (obj->channel == DAC_CHANNEL_1) {
channel1_used = 1;
}
#if defined(DAC_CHANNEL_2)
if (obj->channel == DAC_CHANNEL_2) {
channel2_used = 1;
}
#endif
analogout_write_u16(obj, 0);
HAL_DAC_Start(&obj->handle, obj->channel);
}
void analogout_free(dac_t *obj)
{
if (obj->channel == DAC_CHANNEL_1) {
channel1_used = 0;
}
#if defined(DAC_CHANNEL_2)
if (obj->channel == DAC_CHANNEL_2) {
channel2_used = 0;
}
#endif
if ((channel1_used == 0)
#if defined(DAC_CHANNEL_2)
&& (channel2_used == 0)
#endif
) {
// Reset DAC and disable clock
__HAL_RCC_DAC12_FORCE_RESET();
__HAL_RCC_DAC12_RELEASE_RESET();
__HAL_RCC_DAC12_CLK_DISABLE();
}
#if defined(DAC2)
if (obj->dac == DAC_2) {
__HAL_RCC_DAC2_FORCE_RESET();
__HAL_RCC_DAC2_RELEASE_RESET();
__HAL_RCC_DAC2_CLK_DISABLE();
}
#endif
// Configure GPIO back to reset value
pin_function(obj->pin, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0));
}
const PinMap *analogout_pinmap()