+++ /dev/null
-/* 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;
-
-void analogin_init(analogin_t *obj, PinName pin)
-{
- static int adc1_inited = 0;
- static int adc2_inited = 0;
-
- // 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;
-
- // Check if ADC is already initialized
- if ((obj->adc == ADC_1) && adc1_inited) return;
- if ((obj->adc == ADC_2) && adc2_inited) return;
-
- if (obj->adc == ADC_1) {
- __ADC12_CLK_ENABLE();
- adc1_inited = 1;
- }
-
- if (obj->adc == ADC_2) {
- __ADC12_CLK_ENABLE();
- adc2_inited = 1;
- }
-
- // Configure ADC
- AdcHandle.Instance = (ADC_TypeDef *)(obj->adc);
- AdcHandle.Init.ClockPrescaler = ADC_CLOCKPRESCALER_PCLK_DIV2;
- AdcHandle.Init.Resolution = ADC_RESOLUTION12b;
- AdcHandle.Init.DataAlign = ADC_DATAALIGN_RIGHT;
- AdcHandle.Init.ScanConvMode = DISABLE;
- AdcHandle.Init.EOCSelection = EOC_SINGLE_CONV;
- AdcHandle.Init.LowPowerAutoWait = DISABLE;
- AdcHandle.Init.ContinuousConvMode = DISABLE;
- AdcHandle.Init.NbrOfConversion = 1;
- AdcHandle.Init.DiscontinuousConvMode = DISABLE;
- AdcHandle.Init.NbrOfDiscConversion = 0;
- AdcHandle.Init.ExternalTrigConv = ADC_EXTERNALTRIGCONV_T1_CC1;
- AdcHandle.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
- AdcHandle.Init.DMAContinuousRequests = DISABLE;
- AdcHandle.Init.Overrun = OVR_DATA_OVERWRITTEN;
- HAL_ADC_Init(&AdcHandle);
-}
-
-static inline uint16_t adc_read(analogin_t *obj)
-{
- ADC_ChannelConfTypeDef sConfig;
-
- AdcHandle.Instance = (ADC_TypeDef *)(obj->adc);
-
- // Configure ADC channel
- sConfig.Rank = ADC_REGULAR_RANK_1;
- sConfig.SamplingTime = ADC_SAMPLETIME_19CYCLES_5;
- sConfig.SingleDiff = ADC_SINGLE_ENDED;
- sConfig.OffsetNumber = ADC_OFFSET_NONE;
- sConfig.Offset = 0;
-
- switch (obj->pin) {
- case PA_0:
- case PA_4:
- sConfig.Channel = ADC_CHANNEL_1;
- break;
- case PA_1:
- case PA_5:
- sConfig.Channel = ADC_CHANNEL_2;
- break;
- case PA_2:
- case PA_6:
- sConfig.Channel = ADC_CHANNEL_3;
- break;
- case PA_3:
- case PA_7:
- sConfig.Channel = ADC_CHANNEL_4;
- break;
- case PC_4:
- sConfig.Channel = ADC_CHANNEL_5;
- break;
- case PC_0:
- sConfig.Channel = ADC_CHANNEL_6;
- break;
- case PC_1:
- sConfig.Channel = ADC_CHANNEL_7;
- break;
- case PC_2:
- sConfig.Channel = ADC_CHANNEL_8;
- break;
- case PC_3:
- sConfig.Channel = ADC_CHANNEL_9;
- break;
- case PC_5:
- sConfig.Channel = ADC_CHANNEL_11;
- break;
- case PB_2:
- sConfig.Channel = ADC_CHANNEL_12;
- break;
- case PB_11:
- sConfig.Channel = ADC_CHANNEL_14;
- break;
- default:
- return 0;
- }
-
- 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
projects / qmk_firmware.git / blobdiff