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Merge pull request #5188 from bcostm/fix_dac_f207zg 

NUCLEO_F207ZG: Analogout improvement
pull/5180/merge
Jimmy Brisson 2017-10-23 10:31:17 -05:00 committed by GitHub
parent 656aa8279b 02598d57fa
commit 3354327a9f
2 changed files with 25 additions and 16 deletions
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38
targets/TARGET_STM/TARGET_STM32F2/analogout_device.c
View File

@ -1,5 +1,5 @@
/* mbed Microcontroller Library
* Copyright (c) 2016, STMicroelectronics
* Copyright (c) 2017, STMicroelectronics
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
@ -25,6 +25,7 @@
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "mbed_assert.h"
#include "analogout_api.h"
#if DEVICE_ANALOGOUT
@ -32,19 +33,20 @@
#include "cmsis.h"
#include "pinmap.h"
#include "mbed_error.h"
#include "stm32f2xx_hal.h"
#include "PeripheralPins.h"
void analogout_init(dac_t *obj, PinName pin)
{
DAC_ChannelConfTypeDef sConfig;
DAC_ChannelConfTypeDef sConfig = {0};
// Get the peripheral name (DAC_1, ...) from the pin and assign it to the object
// Get the peripheral name from the pin and assign it to the object
obj->dac = (DACName)pinmap_peripheral(pin, PinMap_DAC);
// Get the functions (dac channel) from the pin and assign it to the object
MBED_ASSERT(obj->dac != (DACName)NC);
// Get the pin function and assign the used channel to the object
uint32_t function = pinmap_function(pin, PinMap_DAC);
MBED_ASSERT(function != (uint32_t)NC);
// Save the channel for the write and read functions
switch (STM_PIN_CHANNEL(function)) {
case 1:
obj->channel = DAC_CHANNEL_1;
@ -59,18 +61,19 @@ void analogout_init(dac_t *obj, PinName pin)
break;
}
if (obj->dac == (DACName)NC) {
error("DAC pin mapping failed");
}
// Configure GPIO
pinmap_pinout(pin, PinMap_DAC);
__GPIOA_CLK_ENABLE();
// Save the pin for future use
obj->pin = pin;
__DAC_CLK_ENABLE();
// Enable DAC clock
__HAL_RCC_DAC_CLK_ENABLE();
// Configure DAC
obj->handle.Instance = (DAC_TypeDef *)(obj->dac);
obj->handle.State = HAL_DAC_STATE_RESET;
obj->handle.Instance = DAC;
if (HAL_DAC_Init(&obj->handle) != HAL_OK ) {
error("HAL_DAC_Init failed");
}
@ -87,8 +90,13 @@ void analogout_init(dac_t *obj, PinName pin)
void analogout_free(dac_t *obj)
{
// Reset DAC and disable clock
__HAL_RCC_DAC_FORCE_RESET();
__HAL_RCC_DAC_RELEASE_RESET();
__HAL_RCC_DAC_CLK_DISABLE();
// Configure GPIO
pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
}
#endif // DEVICE_ANALOGOUT

3
targets/TARGET_STM/TARGET_STM32F2/objects.h
View File

@ -62,7 +62,8 @@ struct analogin_s {
struct dac_s {
DACName dac;
uint8_t channel;
PinName pin;
uint32_t channel;
DAC_HandleTypeDef handle;
};