Diff: targets/TARGET_STM/TARGET_STM32F0/analogin_api.c

Revision:

172:89b338f31ef1

Parent:

160:d5399cc887bb

Child:

173:7d866c31b3c5

diff -r 19eb464bc2be -r 89b338f31ef1 targets/TARGET_STM/TARGET_STM32F0/analogin_api.c
--- a/targets/TARGET_STM/TARGET_STM32F0/analogin_api.c	Thu Aug 03 13:13:39 2017 +0100
+++ b/targets/TARGET_STM/TARGET_STM32F0/analogin_api.c	Wed Aug 16 18:27:13 2017 +0100
@@ -36,15 +36,13 @@
 #include "PeripheralPins.h"
 #include "mbed_error.h"
 
-ADC_HandleTypeDef AdcHandle;
-
 int adc_inited = 0;
 
 void analogin_init(analogin_t *obj, PinName pin) {
     // Get the peripheral name from the pin and assign it to the object
-    obj->adc = (ADCName)pinmap_peripheral(pin, PinMap_ADC);
-    MBED_ASSERT(obj->adc != (ADCName)NC);
-    
+    obj->handle.Instance = (ADC_TypeDef *) pinmap_peripheral(pin, PinMap_ADC);
+    MBED_ASSERT(obj->handle.Instance != (ADC_TypeDef *)NC);
+
     // Get the functions (adc channel) from the pin and assign it to the object
     uint32_t function = pinmap_function(pin, PinMap_ADC);
     MBED_ASSERT(function != (uint32_t)NC);
@@ -67,25 +65,25 @@
         __ADC1_CLK_ENABLE();
 
         // Configure ADC
-        AdcHandle.Instance = (ADC_TypeDef *)(obj->adc);
-        AdcHandle.Init.ClockPrescaler        = ADC_CLOCK_SYNC_PCLK_DIV4;
-        AdcHandle.Init.Resolution            = ADC_RESOLUTION12b;
-        AdcHandle.Init.DataAlign             = ADC_DATAALIGN_RIGHT;
-        AdcHandle.Init.ScanConvMode          = ADC_SCAN_DIRECTION_FORWARD;
-        AdcHandle.Init.EOCSelection          = EOC_SINGLE_CONV;
-        AdcHandle.Init.LowPowerAutoWait      = DISABLE;
-        AdcHandle.Init.LowPowerAutoPowerOff  = DISABLE;
-        AdcHandle.Init.ContinuousConvMode    = DISABLE;
-        AdcHandle.Init.DiscontinuousConvMode = DISABLE;
-        AdcHandle.Init.ExternalTrigConv      = ADC_SOFTWARE_START;
-        AdcHandle.Init.ExternalTrigConvEdge  = ADC_EXTERNALTRIGCONVEDGE_NONE;
-        AdcHandle.Init.DMAContinuousRequests = DISABLE;
-        AdcHandle.Init.Overrun               = OVR_DATA_OVERWRITTEN;
-        if (HAL_ADC_Init(&AdcHandle) != HAL_OK) {
+        obj->handle.State = HAL_ADC_STATE_RESET;
+        obj->handle.Init.ClockPrescaler        = ADC_CLOCK_SYNC_PCLK_DIV4;
+        obj->handle.Init.Resolution            = ADC_RESOLUTION12b;
+        obj->handle.Init.DataAlign             = ADC_DATAALIGN_RIGHT;
+        obj->handle.Init.ScanConvMode          = ADC_SCAN_DIRECTION_FORWARD;
+        obj->handle.Init.EOCSelection          = EOC_SINGLE_CONV;
+        obj->handle.Init.LowPowerAutoWait      = DISABLE;
+        obj->handle.Init.LowPowerAutoPowerOff  = DISABLE;
+        obj->handle.Init.ContinuousConvMode    = DISABLE;
+        obj->handle.Init.DiscontinuousConvMode = DISABLE;
+        obj->handle.Init.ExternalTrigConv      = ADC_SOFTWARE_START;
+        obj->handle.Init.ExternalTrigConvEdge  = ADC_EXTERNALTRIGCONVEDGE_NONE;
+        obj->handle.Init.DMAContinuousRequests = DISABLE;
+        obj->handle.Init.Overrun               = OVR_DATA_OVERWRITTEN;
+        if (HAL_ADC_Init(&obj->handle) != HAL_OK) {
             error("Cannot initialize ADC");
         }
         // Run the ADC calibration
-        if (HAL_ADCEx_Calibration_Start(&AdcHandle) != HAL_OK) {
+        if (HAL_ADCEx_Calibration_Start(&obj->handle) != HAL_OK) {
             error("Cannot Start ADC_Calibration");
         }
     }
@@ -94,8 +92,6 @@
 static inline uint16_t adc_read(analogin_t *obj) {
     ADC_ChannelConfTypeDef sConfig;
 
-    AdcHandle.Instance = (ADC_TypeDef *)(obj->adc);
-
     // Configure ADC channel
     sConfig.Rank         = ADC_RANK_CHANNEL_NUMBER;
 #if defined (TARGET_STM32F091RC)
@@ -169,15 +165,15 @@
     }
 
     // Clear all channels as it is not done in HAL_ADC_ConfigChannel()
-    AdcHandle.Instance->CHSELR = 0;
+    obj->handle.Instance->CHSELR = 0;
 
-    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 (HAL_ADC_GetValue(&AdcHandle));
+    if (HAL_ADC_PollForConversion(&obj->handle, 10) == HAL_OK) {
+        return (HAL_ADC_GetValue(&obj->handle));
     } else {
         return 0;
     }