Diff: targets/TARGET_STM/TARGET_STM32L0/analogin_api.c

Revision:

181:96ed750bd169

Parent:

180:b0033dcd6934

Child:

182:57724642e740

--- a/targets/TARGET_STM/TARGET_STM32L0/analogin_api.c	Thu Dec 07 14:01:42 2017 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,205 +0,0 @@
-/* mbed Microcontroller Library
- * Copyright (c) 2015, 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 "mbed_wait_api.h"
-#include "cmsis.h"
-#include "pinmap.h"
-#include "mbed_error.h"
-#include "PeripheralPins.h"
-
-int adc_inited = 0;
-
-void analogin_init(analogin_t *obj, PinName pin)
-{
-    uint32_t function = (uint32_t)NC;
-    obj->handle.Instance = (ADC_TypeDef *)NC;
-
-    // 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);
-        // 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);
-        function = pinmap_function(pin, PinMap_ADC_Internal);
-        // No GPIO configuration for internal channels
-    }
-    MBED_ASSERT(obj->handle.Instance != (ADC_TypeDef *)NC);
-    MBED_ASSERT(function != (uint32_t)NC);
-
-    obj->channel = STM_PIN_CHANNEL(function);
-
-    // Save pin number for the read function
-    obj->pin = pin;
-
-    // The ADC initialization is done once
-    if (adc_inited == 0) {
-        adc_inited = 1;
-
-        obj->handle.State = HAL_ADC_STATE_RESET;
-        // Enable ADC clock
-        __ADC1_CLK_ENABLE();
-
-        // Configure ADC
-        obj->handle.Init.OversamplingMode      = DISABLE;
-        obj->handle.Init.ClockPrescaler        = ADC_CLOCKPRESCALER_PCLK_DIV1;
-        obj->handle.Init.Resolution            = ADC_RESOLUTION12b;
-        obj->handle.Init.SamplingTime          = ADC_SAMPLETIME_239CYCLES_5;
-        obj->handle.Init.ScanConvMode          = ADC_SCAN_DIRECTION_FORWARD;
-        obj->handle.Init.DataAlign             = ADC_DATAALIGN_RIGHT;
-        obj->handle.Init.ContinuousConvMode    = DISABLE;
-        obj->handle.Init.DiscontinuousConvMode = DISABLE;
-        obj->handle.Init.ExternalTrigConvEdge  = ADC_EXTERNALTRIG_EDGE_NONE;
-        obj->handle.Init.ExternalTrigConv      = ADC_EXTERNALTRIG0_T6_TRGO; // Not used here
-        obj->handle.Init.DMAContinuousRequests = DISABLE;
-        obj->handle.Init.EOCSelection          = EOC_SINGLE_CONV;
-        obj->handle.Init.Overrun               = OVR_DATA_OVERWRITTEN;
-        obj->handle.Init.LowPowerAutoWait      = ENABLE;
-        obj->handle.Init.LowPowerFrequencyMode = DISABLE; // To be enabled only if ADC clock < 2.8 MHz
-        obj->handle.Init.LowPowerAutoPowerOff  = DISABLE;
-
-        if (HAL_ADC_Init(&obj->handle) != HAL_OK) {
-            error("Cannot initialize ADC");
-        }
-
-        // Calibration
-        HAL_ADCEx_Calibration_Start(&obj->handle, ADC_SINGLE_ENDED);
-
-        __HAL_ADC_ENABLE(&obj->handle);
-    }
-}
-
-static inline uint16_t adc_read(analogin_t *obj)
-{
-    ADC_ChannelConfTypeDef sConfig = {0};
-
-    // Configure ADC channel
-    sConfig.Rank = ADC_RANK_CHANNEL_NUMBER;
-    switch (obj->channel) {
-        case 0:
-            sConfig.Channel = ADC_CHANNEL_0;
-            break;
-        case 1:
-            sConfig.Channel = ADC_CHANNEL_1;
-            break;
-        case 2:
-            sConfig.Channel = ADC_CHANNEL_2;
-            break;
-        case 3:
-            sConfig.Channel = ADC_CHANNEL_3;
-            break;
-        case 4:
-            sConfig.Channel = ADC_CHANNEL_4;
-            break;
-        case 5:
-            sConfig.Channel = ADC_CHANNEL_5;
-            break;
-        case 6:
-            sConfig.Channel = ADC_CHANNEL_6;
-            break;
-        case 7:
-            sConfig.Channel = ADC_CHANNEL_7;
-            break;
-        case 8:
-            sConfig.Channel = ADC_CHANNEL_8;
-            break;
-        case 9:
-            sConfig.Channel = ADC_CHANNEL_9;
-            break;
-        case 10:
-            sConfig.Channel = ADC_CHANNEL_10;
-            break;
-        case 11:
-            sConfig.Channel = ADC_CHANNEL_11;
-            break;
-        case 12:
-            sConfig.Channel = ADC_CHANNEL_12;
-            break;
-        case 13:
-            sConfig.Channel = ADC_CHANNEL_13;
-            break;
-        case 14:
-            sConfig.Channel = ADC_CHANNEL_14;
-            break;
-        case 15:
-            sConfig.Channel = ADC_CHANNEL_15;
-            break;
-#ifdef ADC_CHANNEL_VLCD
-        case 16:
-            sConfig.Channel = ADC_CHANNEL_VLCD;
-            break;
-#endif
-        case 17:
-            sConfig.Channel = ADC_CHANNEL_VREFINT;
-            break;
-        case 18:
-            sConfig.Channel = ADC_CHANNEL_TEMPSENSOR;
-            break;
-        default:
-            return 0;
-    }
-
-    ADC1->CHSELR = 0; // [TODO] Workaround. To be removed after Cube driver is corrected.
-    HAL_ADC_ConfigChannel(&obj->handle, &sConfig);
-
-    HAL_ADC_Start(&obj->handle); // Start conversion
-
-    // Wait end of conversion and get value
-    if (HAL_ADC_PollForConversion(&obj->handle, 10) == HAL_OK) {
-        return (HAL_ADC_GetValue(&obj->handle));
-    } 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