+++ /dev/null
-/* mbed Microcontroller Library
- * Copyright (c) 2006-2013 ARM Limited
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-#include "mbed_assert.h"
-#include "analogin_api.h"
-
-#if DEVICE_ANALOGIN
-
-#include "cmsis.h"
-#include "pinmap.h"
-#include "mbed_error.h"
-
-#define ADC_10BIT_RANGE 0x3FF
-#define ADC_12BIT_RANGE 0xFFF
-
-static const PinMap PinMap_ADC[] = {
- {PA_0, ADC0_0, STM_PIN_DATA(3, 0)},
- {PA_1, ADC0_1, STM_PIN_DATA(3, 0)},
- {PA_2, ADC0_2, STM_PIN_DATA(3, 0)},
- {PA_3, ADC0_3, STM_PIN_DATA(3, 0)},
- {PA_4, ADC0_4, STM_PIN_DATA(3, 0)},
- {PA_5, ADC0_5, STM_PIN_DATA(3, 0)},
- {PA_6, ADC0_6, STM_PIN_DATA(3, 0)},
- {PA_7, ADC0_7, STM_PIN_DATA(3, 0)},
- {PB_0, ADC0_8, STM_PIN_DATA(3, 0)},
- {PB_1, ADC0_9, STM_PIN_DATA(3, 0)},
- {PC_0, ADC0_10, STM_PIN_DATA(3, 0)},
- {PC_1, ADC0_11, STM_PIN_DATA(3, 0)},
- {PC_2, ADC0_12, STM_PIN_DATA(3, 0)},
- {PC_3, ADC0_13, STM_PIN_DATA(3, 0)},
- {PC_4, ADC0_14, STM_PIN_DATA(3, 0)},
- {PC_5, ADC0_15, STM_PIN_DATA(3, 0)},
- {NC, NC, 0}
-};
-
-# define ADC_RANGE ADC_12BIT_RANGE
-
-void analogin_init(analogin_t *obj, PinName pin) {
- obj->adc = (ADCName)pinmap_peripheral(pin, PinMap_ADC);
- MBED_ASSERT(obj->adc != (uint32_t)NC);
-
- // ensure power is turned on
- RCC->AHB1ENR |= RCC_AHB1ENR_GPIOAEN | RCC_AHB1ENR_GPIOBEN |
- RCC_AHB1ENR_GPIOCEN;
- RCC->APB2ENR |= RCC_APB2ENR_ADC1EN;
-
- // Enable the ADC
- ADC1->CR2 |= ADC_CR2_ADON;
-
- pinmap_pinout(pin, PinMap_ADC);
-}
-
-static inline uint32_t adc_read(analogin_t *obj) {
- // Select the appropriate channel
- ADC1->SQR3 = (int) obj->adc;
-
- // Start conversion
- ADC1->CR2 |= ADC_CR2_SWSTART;
-
- // Wait for conversion to finish
- while (!(ADC1->SR & ADC_SR_EOC));
-
- uint32_t data = ADC1->DR;
- return data; // 12 bit
-}
-
-static inline uint32_t adc_read_u32(analogin_t *obj) {
- uint32_t value;
- value = adc_read(obj);
- return value;
-}
-
-uint16_t analogin_read_u16(analogin_t *obj) {
- uint32_t value = adc_read_u32(obj);
-
- return (value << 4) | ((value >> 8) & 0x000F); // 12 bit
-}
-
-float analogin_read(analogin_t *obj) {
- uint32_t value = adc_read_u32(obj);
- return (float)value * (1.0f / (float)ADC_RANGE);
-}
-
-#endif