Ken Todotani / mbed-src

mbed library sources

Fork of mbed-src by mbed official

targets/hal/TARGET_STM/TARGET_NUCLEO_L053R8/analogout_api.c@250:a49055e7a707, 2014-07-08 (annotated)

Committer:
mbed_official
Date:
Tue Jul 08 11:15:08 2014 +0100
Revision:
250:a49055e7a707
Parent:
227:7bd0639b8911
Child:
251:de9a1e4ffd79
Synchronized with git revision 3197042b65f8d28e856e1a7812d45e2fbe80e3f1



Full URL: https://github.com/mbedmicro/mbed/commit/3197042b65f8d28e856e1a7812d45e2fbe80e3f1/



error.h -> mbed_error.h

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 181:a4cbdfbbd2f4 1 /* mbed Microcontroller Library
mbed_official 181:a4cbdfbbd2f4 2 * Copyright (c) 2014, STMicroelectronics
mbed_official 181:a4cbdfbbd2f4 3 * All rights reserved.
mbed_official 181:a4cbdfbbd2f4 4 *
mbed_official 181:a4cbdfbbd2f4 5 * Redistribution and use in source and binary forms, with or without
mbed_official 181:a4cbdfbbd2f4 6 * modification, are permitted provided that the following conditions are met:
mbed_official 181:a4cbdfbbd2f4 7 *
mbed_official 181:a4cbdfbbd2f4 8 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 181:a4cbdfbbd2f4 9 * this list of conditions and the following disclaimer.
mbed_official 181:a4cbdfbbd2f4 10 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 181:a4cbdfbbd2f4 11 * this list of conditions and the following disclaimer in the documentation
mbed_official 181:a4cbdfbbd2f4 12 * and/or other materials provided with the distribution.
mbed_official 181:a4cbdfbbd2f4 13 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 181:a4cbdfbbd2f4 14 * may be used to endorse or promote products derived from this software
mbed_official 181:a4cbdfbbd2f4 15 * without specific prior written permission.
mbed_official 181:a4cbdfbbd2f4 16 *
mbed_official 181:a4cbdfbbd2f4 17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 181:a4cbdfbbd2f4 18 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 181:a4cbdfbbd2f4 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 181:a4cbdfbbd2f4 20 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 181:a4cbdfbbd2f4 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 181:a4cbdfbbd2f4 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 181:a4cbdfbbd2f4 23 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 181:a4cbdfbbd2f4 24 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 181:a4cbdfbbd2f4 25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 181:a4cbdfbbd2f4 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 181:a4cbdfbbd2f4 27 */
mbed_official 227:7bd0639b8911 28 #include "mbed_assert.h"
mbed_official 181:a4cbdfbbd2f4 29 #include "analogout_api.h"
mbed_official 181:a4cbdfbbd2f4 30
mbed_official 181:a4cbdfbbd2f4 31 #if DEVICE_ANALOGOUT
mbed_official 181:a4cbdfbbd2f4 32
mbed_official 181:a4cbdfbbd2f4 33 #include "cmsis.h"
mbed_official 181:a4cbdfbbd2f4 34 #include "pinmap.h"
mbed_official 250:a49055e7a707 35 #include "mbed_error.h"
mbed_official 181:a4cbdfbbd2f4 36
mbed_official 181:a4cbdfbbd2f4 37 #define DAC_RANGE (0xFFF) // 12 bits
mbed_official 181:a4cbdfbbd2f4 38
mbed_official 181:a4cbdfbbd2f4 39 static const PinMap PinMap_DAC[] = {
mbed_official 181:a4cbdfbbd2f4 40 {PA_4, DAC_1, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0)}, // DAC_OUT
mbed_official 181:a4cbdfbbd2f4 41 {NC, NC, 0}
mbed_official 181:a4cbdfbbd2f4 42 };
mbed_official 181:a4cbdfbbd2f4 43
mbed_official 181:a4cbdfbbd2f4 44 static DAC_HandleTypeDef DacHandle;
mbed_official 181:a4cbdfbbd2f4 45
mbed_official 181:a4cbdfbbd2f4 46 void analogout_init(dac_t *obj, PinName pin) {
mbed_official 181:a4cbdfbbd2f4 47 DAC_ChannelConfTypeDef sConfig;
mbed_official 181:a4cbdfbbd2f4 48
mbed_official 181:a4cbdfbbd2f4 49 DacHandle.Instance = DAC;
mbed_official 181:a4cbdfbbd2f4 50
mbed_official 181:a4cbdfbbd2f4 51 // Get the peripheral name (DAC_1, ...) from the pin and assign it to the object
mbed_official 181:a4cbdfbbd2f4 52 obj->dac = (DACName)pinmap_peripheral(pin, PinMap_DAC);
mbed_official 227:7bd0639b8911 53 MBED_ASSERT(obj->dac != (DACName)NC);
mbed_official 181:a4cbdfbbd2f4 54
mbed_official 181:a4cbdfbbd2f4 55 // Configure GPIO
mbed_official 181:a4cbdfbbd2f4 56 pinmap_pinout(pin, PinMap_DAC);
mbed_official 181:a4cbdfbbd2f4 57
mbed_official 181:a4cbdfbbd2f4 58 // Save the channel for future use
mbed_official 217:d0ccc61c1fd4 59 obj->pin = pin;
mbed_official 181:a4cbdfbbd2f4 60
mbed_official 181:a4cbdfbbd2f4 61 // Enable DAC clock
mbed_official 181:a4cbdfbbd2f4 62 __DAC_CLK_ENABLE();
mbed_official 181:a4cbdfbbd2f4 63
mbed_official 181:a4cbdfbbd2f4 64 // Configure DAC
mbed_official 181:a4cbdfbbd2f4 65 sConfig.DAC_Trigger = DAC_TRIGGER_NONE;
mbed_official 181:a4cbdfbbd2f4 66 sConfig.DAC_OutputBuffer = DAC_OUTPUTBUFFER_DISABLE;
mbed_official 181:a4cbdfbbd2f4 67
mbed_official 181:a4cbdfbbd2f4 68 HAL_DAC_ConfigChannel(&DacHandle, &sConfig, DAC_CHANNEL_1);
mbed_official 181:a4cbdfbbd2f4 69
mbed_official 181:a4cbdfbbd2f4 70 analogout_write_u16(obj, 0);
mbed_official 181:a4cbdfbbd2f4 71 }
mbed_official 181:a4cbdfbbd2f4 72
mbed_official 181:a4cbdfbbd2f4 73 void analogout_free(dac_t *obj) {
mbed_official 201:fa203361dc70 74 // Reset DAC and disable clock
mbed_official 181:a4cbdfbbd2f4 75 __DAC_FORCE_RESET();
mbed_official 181:a4cbdfbbd2f4 76 __DAC_RELEASE_RESET();
mbed_official 181:a4cbdfbbd2f4 77 __DAC_CLK_DISABLE();
mbed_official 201:fa203361dc70 78
mbed_official 181:a4cbdfbbd2f4 79 // Configure GPIO
mbed_official 217:d0ccc61c1fd4 80 pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
mbed_official 181:a4cbdfbbd2f4 81 }
mbed_official 181:a4cbdfbbd2f4 82
mbed_official 181:a4cbdfbbd2f4 83 static inline void dac_write(dac_t *obj, uint16_t value) {
mbed_official 181:a4cbdfbbd2f4 84 HAL_DAC_SetValue(&DacHandle, DAC_CHANNEL_1, DAC_ALIGN_12B_R, value);
mbed_official 181:a4cbdfbbd2f4 85 HAL_DAC_Start(&DacHandle, DAC_CHANNEL_1);
mbed_official 181:a4cbdfbbd2f4 86 }
mbed_official 181:a4cbdfbbd2f4 87
mbed_official 181:a4cbdfbbd2f4 88 static inline int dac_read(dac_t *obj) {
mbed_official 181:a4cbdfbbd2f4 89 return (int)HAL_DAC_GetValue(&DacHandle, DAC_CHANNEL_1);
mbed_official 181:a4cbdfbbd2f4 90 }
mbed_official 181:a4cbdfbbd2f4 91
mbed_official 181:a4cbdfbbd2f4 92 void analogout_write(dac_t *obj, float value) {
mbed_official 181:a4cbdfbbd2f4 93 if (value < 0.0f) {
mbed_official 181:a4cbdfbbd2f4 94 dac_write(obj, 0); // Min value
mbed_official 181:a4cbdfbbd2f4 95 } else if (value > 1.0f) {
mbed_official 181:a4cbdfbbd2f4 96 dac_write(obj, (uint16_t)DAC_RANGE); // Max value
mbed_official 181:a4cbdfbbd2f4 97 } else {
mbed_official 181:a4cbdfbbd2f4 98 dac_write(obj, (uint16_t)(value * (float)DAC_RANGE));
mbed_official 181:a4cbdfbbd2f4 99 }
mbed_official 181:a4cbdfbbd2f4 100 }
mbed_official 181:a4cbdfbbd2f4 101
mbed_official 181:a4cbdfbbd2f4 102 void analogout_write_u16(dac_t *obj, uint16_t value) {
mbed_official 181:a4cbdfbbd2f4 103 if (value > (uint16_t)DAC_RANGE) {
mbed_official 181:a4cbdfbbd2f4 104 dac_write(obj, (uint16_t)DAC_RANGE); // Max value
mbed_official 181:a4cbdfbbd2f4 105 } else {
mbed_official 181:a4cbdfbbd2f4 106 dac_write(obj, value);
mbed_official 181:a4cbdfbbd2f4 107 }
mbed_official 181:a4cbdfbbd2f4 108 }
mbed_official 181:a4cbdfbbd2f4 109
mbed_official 181:a4cbdfbbd2f4 110 float analogout_read(dac_t *obj) {
mbed_official 181:a4cbdfbbd2f4 111 uint32_t value = dac_read(obj);
mbed_official 181:a4cbdfbbd2f4 112 return (float)((float)value * (1.0f / (float)DAC_RANGE));
mbed_official 181:a4cbdfbbd2f4 113 }
mbed_official 181:a4cbdfbbd2f4 114
mbed_official 181:a4cbdfbbd2f4 115 uint16_t analogout_read_u16(dac_t *obj) {
mbed_official 181:a4cbdfbbd2f4 116 return (uint16_t)dac_read(obj);
mbed_official 181:a4cbdfbbd2f4 117 }
mbed_official 181:a4cbdfbbd2f4 118
mbed_official 181:a4cbdfbbd2f4 119 #endif // DEVICE_ANALOGOUT