Diff: targets/hal/TARGET_STM/TARGET_NUCLEO_L053R8/analogin_api.c

Revision:

491:b97b6b70036c

Parent:

490:ac0b37ef1651

Child:

492:7aa61083666c

--- a/targets/hal/TARGET_STM/TARGET_NUCLEO_L053R8/analogin_api.c	Fri Mar 13 10:45:07 2015 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,176 +0,0 @@
-/* mbed Microcontroller Library
- * Copyright (c) 2014, STMicroelectronics
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- *    this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright notice,
- *    this list of conditions and the following disclaimer in the documentation
- *    and/or other materials provided with the distribution.
- * 3. Neither the name of STMicroelectronics nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
- * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
- * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
- * 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 "analogin_api.h"
-
-#if DEVICE_ANALOGIN
-
-#include "wait_api.h"
-#include "cmsis.h"
-#include "pinmap.h"
-#include "PeripheralPins.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);
-
-    // Configure GPIO
-    pinmap_pinout(pin, PinMap_ADC);
-
-    // Save pin number for the read function
-    obj->pin = pin;
-
-    // The ADC initialization is done once
-    if (adc_inited == 0) {
-        adc_inited = 1;
-
-        AdcHandle.Instance = (ADC_TypeDef *)(obj->adc);
-
-        // Enable ADC clock
-        __ADC1_CLK_ENABLE();
-
-        // Configure ADC
-        AdcHandle.Init.OversamplingMode      = DISABLE;
-        AdcHandle.Init.ClockPrescaler        = ADC_CLOCKPRESCALER_PCLK_DIV1;
-        AdcHandle.Init.Resolution            = ADC_RESOLUTION12b;
-        AdcHandle.Init.SamplingTime          = ADC_SAMPLETIME_41CYCLES_5;
-        AdcHandle.Init.ScanConvMode          = ADC_SCAN_DIRECTION_FORWARD;
-        AdcHandle.Init.DataAlign             = ADC_DATAALIGN_RIGHT;
-        AdcHandle.Init.ContinuousConvMode    = DISABLE;
-        AdcHandle.Init.DiscontinuousConvMode = DISABLE;
-        AdcHandle.Init.ExternalTrigConvEdge  = ADC_EXTERNALTRIG_EDGE_NONE;
-        AdcHandle.Init.ExternalTrigConv      = ADC_EXTERNALTRIG0_T6_TRGO; // Not used here
-        AdcHandle.Init.DMAContinuousRequests = DISABLE;
-        AdcHandle.Init.EOCSelection          = EOC_SINGLE_CONV;
-        AdcHandle.Init.Overrun               = OVR_DATA_OVERWRITTEN;
-        AdcHandle.Init.LowPowerAutoWait      = ENABLE;
-        AdcHandle.Init.LowPowerFrequencyMode = DISABLE; // To be enabled only if ADC clock < 2.8 MHz
-        AdcHandle.Init.LowPowerAutoPowerOff  = DISABLE;
-        HAL_ADC_Init(&AdcHandle);
-
-        // Calibration
-        HAL_ADCEx_Calibration_Start(&AdcHandle, ADC_SINGLE_ENDED);
-
-        __HAL_ADC_ENABLE(&AdcHandle);
-    }
-}
-
-static inline uint16_t adc_read(analogin_t *obj)
-{
-    ADC_ChannelConfTypeDef sConfig;
-
-    AdcHandle.Instance = (ADC_TypeDef *)(obj->adc);
-
-    // Configure ADC channel
-    switch (obj->pin) {
-        case PA_0:
-            sConfig.Channel = ADC_CHANNEL_0;
-            break;
-        case PA_1:
-            sConfig.Channel = ADC_CHANNEL_1;
-            break;
-        case PA_2:
-            sConfig.Channel = ADC_CHANNEL_2;
-            break;
-        case PA_3:
-            sConfig.Channel = ADC_CHANNEL_3;
-            break;
-        case PA_4:
-            sConfig.Channel = ADC_CHANNEL_4;
-            break;
-        case PA_5:
-            sConfig.Channel = ADC_CHANNEL_5;
-            break;
-        case PA_6:
-            sConfig.Channel = ADC_CHANNEL_6;
-            break;
-        case PA_7:
-            sConfig.Channel = ADC_CHANNEL_7;
-            break;
-        case PB_0:
-            sConfig.Channel = ADC_CHANNEL_8;
-            break;
-        case PB_1:
-            sConfig.Channel = ADC_CHANNEL_9;
-            break;
-        case PC_0:
-            sConfig.Channel = ADC_CHANNEL_10;
-            break;
-        case PC_1:
-            sConfig.Channel = ADC_CHANNEL_11;
-            break;
-        case PC_2:
-            sConfig.Channel = ADC_CHANNEL_12;
-            break;
-        case PC_3:
-            sConfig.Channel = ADC_CHANNEL_13;
-            break;
-        case PC_4:
-            sConfig.Channel = ADC_CHANNEL_14;
-            break;
-        case PC_5:
-            sConfig.Channel = ADC_CHANNEL_15;
-            break;
-        default:
-            return 0;
-    }
-
-    ADC1->CHSELR = 0; // [TODO] Workaround. To be removed after Cube driver is corrected.
-    HAL_ADC_ConfigChannel(&AdcHandle, &sConfig);
-
-    HAL_ADC_Start(&AdcHandle); // Start conversion
-
-    // Wait end of conversion and get value
-    if (HAL_ADC_PollForConversion(&AdcHandle, 10) == HAL_OK) {
-        return (HAL_ADC_GetValue(&AdcHandle));
-    } else {
-        return 0;
-    }
-}
-
-uint16_t analogin_read_u16(analogin_t *obj)
-{
-    uint16_t value = adc_read(obj);
-    // 12-bit to 16-bit conversion
-    value = ((value << 4) & (uint16_t)0xFFF0) | ((value >> 8) & (uint16_t)0x000F);
-    return value;
-}
-
-float analogin_read(analogin_t *obj)
-{
-    uint16_t value = adc_read(obj);
-    return (float)value * (1.0f / (float)0xFFF); // 12 bits range
-}
-
-#endif