mbed library sources
Dependents: frdm_kl05z_gpio_test
Fork of mbed-src by
targets/hal/TARGET_STM/TARGET_DISCO_F407VG/analogout_api.c
- Committer:
- mbed_official
- Date:
- 2014-04-01
- Revision:
- 141:706f8dea204a
- Child:
- 242:7074e42da0b2
File content as of revision 141:706f8dea204a:
/* 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 "analogout_api.h" #if DEVICE_ANALOGOUT #include "cmsis.h" #include "pinmap.h" #include "error.h" #include "stm32f4xx_hal.h" #define RANGE_12BIT (0xFFF) DAC_HandleTypeDef DacHandle; static DAC_ChannelConfTypeDef sConfig; static const PinMap PinMap_DAC[] = { {PA_4, DAC_0, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0xFF)}, // DAC_OUT1 {PA_5, DAC_1, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0xFF)}, // DAC_OUT2 {NC, NC, 0} }; void analogout_init(dac_t *obj, PinName pin) { uint32_t channel ; HAL_StatusTypeDef status; // Get the peripheral name (DAC_1, ...) from the pin and assign it to the object obj->dac = (DACName)pinmap_peripheral(pin, PinMap_DAC); if (obj->dac == (DACName)NC) { error("DAC pin mapping failed"); } // Configure GPIO pinmap_pinout(pin, PinMap_DAC); // Save the channel for the write and read functions obj->channel = pin; __GPIOA_CLK_ENABLE(); __DAC_CLK_ENABLE(); DacHandle.Instance = DAC; status = HAL_DAC_Init(&DacHandle); if ( status != HAL_OK ) { error("HAL_DAC_Init failed"); } sConfig.DAC_Trigger = DAC_TRIGGER_NONE; sConfig.DAC_OutputBuffer = DAC_OUTPUTBUFFER_ENABLE; if (obj->channel == PA_4) { channel = DAC_CHANNEL_1; } else { channel = DAC_CHANNEL_2; } if (HAL_DAC_ConfigChannel(&DacHandle, &sConfig, channel) != HAL_OK) { error("HAL_DAC_ConfigChannel failed"); } if (HAL_DAC_Start(&DacHandle, channel) != HAL_OK) { error("HAL_DAC_Start failed"); } if (HAL_DAC_SetValue(&DacHandle, channel, DAC_ALIGN_12B_R, 0x000) != HAL_OK) { error("HAL_DAC_SetValue failed"); } } void analogout_free(dac_t *obj) { } static inline void dac_write(dac_t *obj, uint16_t value) { HAL_StatusTypeDef status; if (obj->channel == PA_4) { status = HAL_DAC_SetValue(&DacHandle, DAC_CHANNEL_1, DAC_ALIGN_12B_R, value); } else if (obj->channel == PA_5) { status = HAL_DAC_SetValue(&DacHandle, DAC_CHANNEL_2, DAC_ALIGN_12B_R, value); } if ( status != HAL_OK ) { error("ADC pin mapping failed"); } } static inline int dac_read(dac_t *obj) { if (obj->channel == PA_4) { return (int)HAL_DAC_GetValue(&DacHandle, DAC_CHANNEL_1); } else if (obj->channel == PA_5) { return (int)HAL_DAC_GetValue(&DacHandle, DAC_CHANNEL_2); } } void analogout_write(dac_t *obj, float value) { if (value < 0.0f) { dac_write(obj, 0); // Min value } else if (value > 1.0f) { dac_write(obj, (uint16_t)RANGE_12BIT); // Max value } else { dac_write(obj, (uint16_t)(value * (float)RANGE_12BIT)); } } void analogout_write_u16(dac_t *obj, uint16_t value) { if (value > (uint16_t)RANGE_12BIT) { value = (uint16_t)RANGE_12BIT; // Max value } dac_write(obj, value); } float analogout_read(dac_t *obj) { uint32_t value = dac_read(obj); return (float)value * (1.0f / (float)RANGE_12BIT); } uint16_t analogout_read_u16(dac_t *obj) { return (uint16_t)dac_read(obj); } #endif // DEVICE_ANALOGOUT