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STM32F4 ADC: remove adc_inited flag

pull/5513/head
bcostm 2017-11-14 11:30:59 +01:00
parent 7005bc21d7
commit d5ff05a03b
1 changed files with 20 additions and 36 deletions
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56
targets/TARGET_STM/TARGET_STM32F4/analogin_api.c
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@ -40,29 +40,20 @@ void analogin_init(analogin_t *obj, PinName pin)
{
uint32_t function = (uint32_t)NC;
#if defined(ADC1)
static int adc1_inited = 0;
#endif
#if defined(ADC2)
static int adc2_inited = 0;
#endif
#if defined(ADC3)
static int adc3_inited = 0;
#endif
// ADC Internal Channels "pins" (Temperature, Vref, Vbat, ...)
// are described in PinNames.h and PeripheralPins.c
// Pin value must be between 0xF0 and 0xFF
if ((pin < 0xF0) || (pin >= 0x100)) {
// Normal channels
// Get the peripheral name from the pin and assign it to the object
obj->handle.Instance = (ADC_TypeDef *) pinmap_peripheral(pin, PinMap_ADC);
obj->handle.Instance = (ADC_TypeDef *)pinmap_peripheral(pin, PinMap_ADC);
// Get the functions (adc channel) from the pin and assign it to the object
function = pinmap_function(pin, PinMap_ADC);
// Configure GPIO
pinmap_pinout(pin, PinMap_ADC);
} else {
// Internal channels
obj->handle.Instance = (ADC_TypeDef *) pinmap_peripheral(pin, PinMap_ADC_Internal);
obj->handle.Instance = (ADC_TypeDef *)pinmap_peripheral(pin, PinMap_ADC_Internal);
function = pinmap_function(pin, PinMap_ADC_Internal);
// No GPIO configuration for internal channels
}
@ -74,30 +65,7 @@ void analogin_init(analogin_t *obj, PinName pin)
// Save pin number for the read function
obj->pin = pin;
// Check if ADC is already initialized
// Enable ADC clock
#if defined(ADC1)
if (((ADCName)obj->handle.Instance == ADC_1) && adc1_inited) return;
if ((ADCName)obj->handle.Instance == ADC_1) {
__HAL_RCC_ADC1_CLK_ENABLE();
adc1_inited = 1;
}
#endif
#if defined(ADC2)
if (((ADCName)obj->handle.Instance == ADC_2) && adc2_inited) return;
if ((ADCName)obj->handle.Instance == ADC_2) {
__HAL_RCC_ADC2_CLK_ENABLE();
adc2_inited = 1;
}
#endif
#if defined(ADC3)
if (((ADCName)obj->handle.Instance == ADC_3) && adc3_inited) return;
if ((ADCName)obj->handle.Instance == ADC_3) {
__HAL_RCC_ADC3_CLK_ENABLE();
adc3_inited = 1;
}
#endif
// Configure ADC
// Configure ADC object structures
obj->handle.State = HAL_ADC_STATE_RESET;
obj->handle.Init.ClockPrescaler = ADC_CLOCK_SYNC_PCLK_DIV2;
obj->handle.Init.Resolution = ADC_RESOLUTION_12B;
@ -112,8 +80,24 @@ void analogin_init(analogin_t *obj, PinName pin)
obj->handle.Init.DMAContinuousRequests = DISABLE;
obj->handle.Init.EOCSelection = DISABLE;
#if defined(ADC1)
if ((ADCName)obj->handle.Instance == ADC_1) {
__HAL_RCC_ADC1_CLK_ENABLE();
}
#endif
#if defined(ADC2)
if ((ADCName)obj->handle.Instance == ADC_2) {
__HAL_RCC_ADC2_CLK_ENABLE();
}
#endif
#if defined(ADC3)
if ((ADCName)obj->handle.Instance == ADC_3) {
__HAL_RCC_ADC3_CLK_ENABLE();
}
#endif
if (HAL_ADC_Init(&obj->handle) != HAL_OK) {
error("Cannot initialize ADC\n");
error("Cannot initialize ADC");
}
}