diff options
Diffstat (limited to 'tmk_core/tool/mbed/mbed-sdk/libraries/mbed/targets/hal/TARGET_STM/TARGET_STM32F3/TARGET_NUCLEO_F334R8/analogin_api.c')
| -rw-r--r-- | tmk_core/tool/mbed/mbed-sdk/libraries/mbed/targets/hal/TARGET_STM/TARGET_STM32F3/TARGET_NUCLEO_F334R8/analogin_api.c | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/tmk_core/tool/mbed/mbed-sdk/libraries/mbed/targets/hal/TARGET_STM/TARGET_STM32F3/TARGET_NUCLEO_F334R8/analogin_api.c b/tmk_core/tool/mbed/mbed-sdk/libraries/mbed/targets/hal/TARGET_STM/TARGET_STM32F3/TARGET_NUCLEO_F334R8/analogin_api.c new file mode 100644 index 0000000000..81bad9607b --- /dev/null +++ b/tmk_core/tool/mbed/mbed-sdk/libraries/mbed/targets/hal/TARGET_STM/TARGET_STM32F3/TARGET_NUCLEO_F334R8/analogin_api.c @@ -0,0 +1,188 @@ +/* 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) adc1_inited = 1; + if (obj->adc == ADC_2) adc2_inited = 1; + + // Enable ADC clock + __ADC12_CLK_ENABLE(); + + // Configure ADC + AdcHandle.Instance = (ADC_TypeDef *)(obj->adc); + AdcHandle.Init.ClockPrescaler = ADC_CLOCKPRESCALER_PCLK_DIV2; + AdcHandle.Init.Resolution = ADC_RESOLUTION12b; + AdcHandle.Init.ScanConvMode = DISABLE; + AdcHandle.Init.ContinuousConvMode = DISABLE; + AdcHandle.Init.DiscontinuousConvMode = DISABLE; + AdcHandle.Init.NbrOfDiscConversion = 0; + AdcHandle.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE; + AdcHandle.Init.ExternalTrigConv = ADC_EXTERNALTRIGCONV_T1_CC1; + AdcHandle.Init.DataAlign = ADC_DATAALIGN_RIGHT; + AdcHandle.Init.NbrOfConversion = 1; + AdcHandle.Init.DMAContinuousRequests = DISABLE; + AdcHandle.Init.EOCSelection = DISABLE; + 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: + sConfig.Channel = ADC_CHANNEL_1; + break; + case PA_1: + sConfig.Channel = ADC_CHANNEL_2; + break; + case PA_2: + sConfig.Channel = ADC_CHANNEL_3; + break; + case PA_3: + sConfig.Channel = ADC_CHANNEL_4; + break; + case PA_4: + sConfig.Channel = ADC_CHANNEL_1; + break; + case PA_5: + sConfig.Channel = ADC_CHANNEL_2; + break; + case PA_6: + sConfig.Channel = ADC_CHANNEL_3; + break; + case PA_7: + sConfig.Channel = ADC_CHANNEL_4; + break; + case PB_0: + sConfig.Channel = ADC_CHANNEL_11; + break; + case PB_1: + sConfig.Channel = ADC_CHANNEL_12; + break; + case PB_2: + sConfig.Channel = ADC_CHANNEL_12; + break; + case PB_12: + sConfig.Channel = ADC_CHANNEL_13; + break; + case PB_13: + sConfig.Channel = ADC_CHANNEL_13; + break; + case PB_14: + sConfig.Channel = ADC_CHANNEL_14; + break; + case PB_15: + sConfig.Channel = ADC_CHANNEL_15; + 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_4: + sConfig.Channel = ADC_CHANNEL_5; + break; + case PC_5: + sConfig.Channel = ADC_CHANNEL_11; + 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 |