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mbed

Fork of mbed-dev by mbed official

targets/TARGET_STM/TARGET_STM32F2/analogout_device.c@182:57724642e740, 2018-02-16 (annotated)

Committer:
AnnaBridge
Date:
Fri Feb 16 16:09:33 2018 +0000
Revision:
182:57724642e740
Parent:
178:d650f5d4c87a 
mbed-dev library. Release version 159.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
AnnaBridge 168:9672193075cf 1 /* mbed Microcontroller Library
AnnaBridge 178:d650f5d4c87a 2 * Copyright (c) 2017, STMicroelectronics
AnnaBridge 168:9672193075cf 3 * All rights reserved.
AnnaBridge 168:9672193075cf 4 *
AnnaBridge 168:9672193075cf 5 * Redistribution and use in source and binary forms, with or without
AnnaBridge 168:9672193075cf 6 * modification, are permitted provided that the following conditions are met:
AnnaBridge 168:9672193075cf 7 *
AnnaBridge 168:9672193075cf 8 * 1. Redistributions of source code must retain the above copyright notice,
AnnaBridge 168:9672193075cf 9 * this list of conditions and the following disclaimer.
AnnaBridge 168:9672193075cf 10 * 2. Redistributions in binary form must reproduce the above copyright notice,
AnnaBridge 168:9672193075cf 11 * this list of conditions and the following disclaimer in the documentation
AnnaBridge 168:9672193075cf 12 * and/or other materials provided with the distribution.
AnnaBridge 168:9672193075cf 13 * 3. Neither the name of STMicroelectronics nor the names of its contributors
AnnaBridge 168:9672193075cf 14 * may be used to endorse or promote products derived from this software
AnnaBridge 168:9672193075cf 15 * without specific prior written permission.
AnnaBridge 168:9672193075cf 16 *
AnnaBridge 168:9672193075cf 17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AnnaBridge 168:9672193075cf 18 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
AnnaBridge 168:9672193075cf 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
AnnaBridge 168:9672193075cf 20 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
AnnaBridge 168:9672193075cf 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
AnnaBridge 168:9672193075cf 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
AnnaBridge 168:9672193075cf 23 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
AnnaBridge 168:9672193075cf 24 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
AnnaBridge 168:9672193075cf 25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
AnnaBridge 168:9672193075cf 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
AnnaBridge 168:9672193075cf 27 */
AnnaBridge 178:d650f5d4c87a 28 #include "mbed_assert.h"
AnnaBridge 168:9672193075cf 29 #include "analogout_api.h"
AnnaBridge 168:9672193075cf 30
AnnaBridge 168:9672193075cf 31 #if DEVICE_ANALOGOUT
AnnaBridge 168:9672193075cf 32
AnnaBridge 168:9672193075cf 33 #include "cmsis.h"
AnnaBridge 168:9672193075cf 34 #include "pinmap.h"
AnnaBridge 168:9672193075cf 35 #include "mbed_error.h"
AnnaBridge 168:9672193075cf 36 #include "PeripheralPins.h"
AnnaBridge 168:9672193075cf 37
AnnaBridge 168:9672193075cf 38 void analogout_init(dac_t *obj, PinName pin)
AnnaBridge 168:9672193075cf 39 {
AnnaBridge 178:d650f5d4c87a 40 DAC_ChannelConfTypeDef sConfig = {0};
AnnaBridge 168:9672193075cf 41
AnnaBridge 178:d650f5d4c87a 42 // Get the peripheral name from the pin and assign it to the object
AnnaBridge 168:9672193075cf 43 obj->dac = (DACName)pinmap_peripheral(pin, PinMap_DAC);
AnnaBridge 178:d650f5d4c87a 44 MBED_ASSERT(obj->dac != (DACName)NC);
AnnaBridge 178:d650f5d4c87a 45
AnnaBridge 178:d650f5d4c87a 46 // Get the pin function and assign the used channel to the object
AnnaBridge 168:9672193075cf 47 uint32_t function = pinmap_function(pin, PinMap_DAC);
AnnaBridge 168:9672193075cf 48 MBED_ASSERT(function != (uint32_t)NC);
AnnaBridge 178:d650f5d4c87a 49
AnnaBridge 168:9672193075cf 50 switch (STM_PIN_CHANNEL(function)) {
AnnaBridge 168:9672193075cf 51 case 1:
AnnaBridge 168:9672193075cf 52 obj->channel = DAC_CHANNEL_1;
AnnaBridge 168:9672193075cf 53 break;
AnnaBridge 168:9672193075cf 54 #if defined(DAC_CHANNEL_2)
AnnaBridge 168:9672193075cf 55 case 2:
AnnaBridge 168:9672193075cf 56 obj->channel = DAC_CHANNEL_2;
AnnaBridge 168:9672193075cf 57 break;
AnnaBridge 168:9672193075cf 58 #endif
AnnaBridge 168:9672193075cf 59 default:
AnnaBridge 168:9672193075cf 60 error("Unknown DAC channel");
AnnaBridge 168:9672193075cf 61 break;
AnnaBridge 168:9672193075cf 62 }
AnnaBridge 168:9672193075cf 63
AnnaBridge 168:9672193075cf 64 // Configure GPIO
AnnaBridge 168:9672193075cf 65 pinmap_pinout(pin, PinMap_DAC);
AnnaBridge 168:9672193075cf 66
AnnaBridge 178:d650f5d4c87a 67 // Save the pin for future use
AnnaBridge 178:d650f5d4c87a 68 obj->pin = pin;
AnnaBridge 168:9672193075cf 69
AnnaBridge 178:d650f5d4c87a 70 // Enable DAC clock
AnnaBridge 178:d650f5d4c87a 71 __HAL_RCC_DAC_CLK_ENABLE();
AnnaBridge 168:9672193075cf 72
AnnaBridge 178:d650f5d4c87a 73 // Configure DAC
AnnaBridge 178:d650f5d4c87a 74 obj->handle.Instance = (DAC_TypeDef *)(obj->dac);
AnnaBridge 178:d650f5d4c87a 75 obj->handle.State = HAL_DAC_STATE_RESET;
AnnaBridge 178:d650f5d4c87a 76
AnnaBridge 168:9672193075cf 77 if (HAL_DAC_Init(&obj->handle) != HAL_OK ) {
AnnaBridge 168:9672193075cf 78 error("HAL_DAC_Init failed");
AnnaBridge 168:9672193075cf 79 }
AnnaBridge 168:9672193075cf 80
AnnaBridge 168:9672193075cf 81 sConfig.DAC_Trigger = DAC_TRIGGER_NONE;
AnnaBridge 168:9672193075cf 82 sConfig.DAC_OutputBuffer = DAC_OUTPUTBUFFER_ENABLE;
AnnaBridge 168:9672193075cf 83
AnnaBridge 168:9672193075cf 84 if (HAL_DAC_ConfigChannel(&obj->handle, &sConfig, obj->channel) != HAL_OK) {
AnnaBridge 168:9672193075cf 85 error("HAL_DAC_ConfigChannel failed");
AnnaBridge 168:9672193075cf 86 }
AnnaBridge 168:9672193075cf 87
AnnaBridge 168:9672193075cf 88 analogout_write_u16(obj, 0);
AnnaBridge 168:9672193075cf 89 }
AnnaBridge 168:9672193075cf 90
AnnaBridge 168:9672193075cf 91 void analogout_free(dac_t *obj)
AnnaBridge 168:9672193075cf 92 {
AnnaBridge 178:d650f5d4c87a 93 // Reset DAC and disable clock
AnnaBridge 178:d650f5d4c87a 94 __HAL_RCC_DAC_FORCE_RESET();
AnnaBridge 178:d650f5d4c87a 95 __HAL_RCC_DAC_RELEASE_RESET();
AnnaBridge 178:d650f5d4c87a 96 __HAL_RCC_DAC_CLK_DISABLE();
AnnaBridge 178:d650f5d4c87a 97
AnnaBridge 178:d650f5d4c87a 98 // Configure GPIO
AnnaBridge 178:d650f5d4c87a 99 pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
AnnaBridge 168:9672193075cf 100 }
AnnaBridge 168:9672193075cf 101
AnnaBridge 168:9672193075cf 102 #endif // DEVICE_ANALOGOUT