Diff: targets/TARGET_STM/TARGET_STM32F4/analogin_api.c

Revision:

171:89b338f31ef1

Parent:

169:e3b6fe271b81

Child:

172:7d866c31b3c5

--- a/targets/TARGET_STM/TARGET_STM32F4/analogin_api.c	Thu Aug 03 13:13:39 2017 +0100
+++ b/targets/TARGET_STM/TARGET_STM32F4/analogin_api.c	Wed Aug 16 18:27:13 2017 +0100
@@ -36,12 +36,9 @@
 #include "mbed_error.h"
 #include "PeripheralPins.h"
 
-ADC_HandleTypeDef AdcHandle;
-
 void analogin_init(analogin_t *obj, PinName pin)
 {
     uint32_t function = (uint32_t)NC;
-    obj->adc = (ADCName)NC;
 
 #if defined(ADC1)
     static int adc1_inited = 0;
@@ -58,18 +55,18 @@
     if (pin < 0xF0) {
         // Normal channels
         // Get the peripheral name from the pin and assign it to the object
-        obj->adc = (ADCName)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->adc = (ADCName)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
     }
-    MBED_ASSERT(obj->adc != (ADCName)NC);
+    MBED_ASSERT(obj->handle.Instance != (ADC_TypeDef *)NC);
     MBED_ASSERT(function != (uint32_t)NC);
 
     obj->channel = STM_PIN_CHANNEL(function);
@@ -80,42 +77,42 @@
     // Check if ADC is already initialized
     // Enable ADC clock
 #if defined(ADC1)
-    if ((obj->adc == ADC_1) && adc1_inited) return;
-    if (obj->adc == ADC_1) {
+    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 ((obj->adc == ADC_2) && adc2_inited) return;
-    if (obj->adc == ADC_2) {
+    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 ((obj->adc == ADC_3) && adc3_inited) return;
-    if (obj->adc == ADC_3) {
+    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
-    AdcHandle.Instance = (ADC_TypeDef *)(obj->adc);
-    AdcHandle.Init.ClockPrescaler        = ADC_CLOCK_SYNC_PCLK_DIV2;
-    AdcHandle.Init.Resolution            = ADC_RESOLUTION_12B;
-    AdcHandle.Init.ScanConvMode          = DISABLE;
-    AdcHandle.Init.ContinuousConvMode    = DISABLE;
-    AdcHandle.Init.DiscontinuousConvMode = DISABLE;
-    AdcHandle.Init.NbrOfDiscConversion   = 0;
-    AdcHandle.Init.ExternalTrigConvEdge  = ADC_EXTERNALTRIGCONVEDGE_NONE;
-    AdcHandle.Init.ExternalTrigConv      = ADC_EXTERNALTRIGCONV_T1_CC1;
-    AdcHandle.Init.DataAlign             = ADC_DATAALIGN_RIGHT;
-    AdcHandle.Init.NbrOfConversion       = 1;
-    AdcHandle.Init.DMAContinuousRequests = DISABLE;
-    AdcHandle.Init.EOCSelection          = DISABLE;
+    obj->handle.State = HAL_ADC_STATE_RESET;
+    obj->handle.Init.ClockPrescaler        = ADC_CLOCK_SYNC_PCLK_DIV2;
+    obj->handle.Init.Resolution            = ADC_RESOLUTION_12B;
+    obj->handle.Init.ScanConvMode          = DISABLE;
+    obj->handle.Init.ContinuousConvMode    = DISABLE;
+    obj->handle.Init.DiscontinuousConvMode = DISABLE;
+    obj->handle.Init.NbrOfDiscConversion   = 0;
+    obj->handle.Init.ExternalTrigConvEdge  = ADC_EXTERNALTRIGCONVEDGE_NONE;
+    obj->handle.Init.ExternalTrigConv      = ADC_EXTERNALTRIGCONV_T1_CC1;
+    obj->handle.Init.DataAlign             = ADC_DATAALIGN_RIGHT;
+    obj->handle.Init.NbrOfConversion       = 1;
+    obj->handle.Init.DMAContinuousRequests = DISABLE;
+    obj->handle.Init.EOCSelection          = DISABLE;
 
-    if (HAL_ADC_Init(&AdcHandle) != HAL_OK) {
+    if (HAL_ADC_Init(&obj->handle) != HAL_OK) {
         error("Cannot initialize ADC\n");
     }
 }
@@ -124,8 +121,6 @@
 {
     ADC_ChannelConfTypeDef sConfig = {0};
 
-    AdcHandle.Instance = (ADC_TypeDef *)(obj->adc);
-
     // Configure ADC channel
     sConfig.Rank         = 1;
     sConfig.SamplingTime = ADC_SAMPLETIME_15CYCLES;
@@ -202,13 +197,13 @@
     // so VBAT readings are returned in place of temperature.
     ADC->CCR &= ~(ADC_CCR_VBATE | ADC_CCR_TSVREFE);
 
-    HAL_ADC_ConfigChannel(&AdcHandle, &sConfig);
+    HAL_ADC_ConfigChannel(&obj->handle, &sConfig);
 
-    HAL_ADC_Start(&AdcHandle); // Start conversion
+    HAL_ADC_Start(&obj->handle); // Start conversion
 
     // Wait end of conversion and get value
-    if (HAL_ADC_PollForConversion(&AdcHandle, 10) == HAL_OK) {
-        return (uint16_t)HAL_ADC_GetValue(&AdcHandle);
+    if (HAL_ADC_PollForConversion(&obj->handle, 10) == HAL_OK) {
+        return (uint16_t)HAL_ADC_GetValue(&obj->handle);
     } else {
         return 0;
     }