test
Fork of mbed-dev by
targets/TARGET_STM/TARGET_STM32F0/analogout_device.c
- Committer:
- AnnaBridge
- Date:
- 2017-07-06
- Revision:
- 169:9672193075cf
- Child:
- 177:447f873cad2f
File content as of revision 169:9672193075cf:
/* 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 "analogout_api.h" #if DEVICE_ANALOGOUT #include "cmsis.h" #include "pinmap.h" #include "mbed_error.h" #include "PeripheralPins.h" void analogout_init(dac_t *obj, PinName pin) { DAC_ChannelConfTypeDef sConfig; // Get the peripheral name from the pin and assign it to the object obj->dac = (DACName)pinmap_peripheral(pin, PinMap_DAC); MBED_ASSERT(obj->dac != (DACName)NC); // Get the pin function and assign the used channel to the object uint32_t function = pinmap_function(pin, PinMap_DAC); MBED_ASSERT(function != (uint32_t)NC); switch (STM_PIN_CHANNEL(function)) { case 1: obj->channel = DAC_CHANNEL_1; break; #if defined(DAC_CHANNEL_2) case 2: obj->channel = DAC_CHANNEL_2; break; #endif default: error("Unknown DAC channel"); break; } // Configure GPIO pinmap_pinout(pin, PinMap_DAC); // Save the pin for future use obj->pin = pin; // Enable DAC clock __HAL_RCC_DAC1_CLK_ENABLE(); // Configure DAC obj->handle.Instance = (DAC_TypeDef *)(obj->dac); if (HAL_DAC_Init(&obj->handle) != HAL_OK ) { error("HAL_DAC_Init failed"); } sConfig.DAC_Trigger = DAC_TRIGGER_NONE; sConfig.DAC_OutputBuffer = DAC_OUTPUTBUFFER_ENABLE; if (HAL_DAC_ConfigChannel(&obj->handle, &sConfig, obj->channel) != HAL_OK) { error("HAL_DAC_ConfigChannel failed"); } analogout_write_u16(obj, 0); } void analogout_free(dac_t *obj) { // Reset DAC and disable clock __HAL_RCC_DAC1_FORCE_RESET(); __HAL_RCC_DAC1_RELEASE_RESET(); __HAL_RCC_DAC1_CLK_DISABLE(); // Configure GPIO pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0)); } #endif // DEVICE_ANALOGOUT