Ken Todotani / mbed-src

mbed library sources

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targets/hal/TARGET_STM/TARGET_DISCO_F303VC/analogout_api.c@157:90e3acc479a2, 2014-04-11 (annotated)

Committer:
mbed_official
Date:
Fri Apr 11 17:15:06 2014 +0100
Revision:
157:90e3acc479a2
Child:
241:ffe41b0c8126
Synchronized with git revision 6e20ca17847dceb62132bf3d8519876411e175bf



Full URL: https://github.com/mbedmicro/mbed/commit/6e20ca17847dceb62132bf3d8519876411e175bf/



[STM32F3-Discovery][DISCO_F303VC] initial port.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 157:90e3acc479a2 1 /* mbed Microcontroller Library
mbed_official 157:90e3acc479a2 2 * Copyright (c) 2014, STMicroelectronics
mbed_official 157:90e3acc479a2 3 * All rights reserved.
mbed_official 157:90e3acc479a2 4 *
mbed_official 157:90e3acc479a2 5 * Redistribution and use in source and binary forms, with or without
mbed_official 157:90e3acc479a2 6 * modification, are permitted provided that the following conditions are met:
mbed_official 157:90e3acc479a2 7 *
mbed_official 157:90e3acc479a2 8 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 157:90e3acc479a2 9 * this list of conditions and the following disclaimer.
mbed_official 157:90e3acc479a2 10 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 157:90e3acc479a2 11 * this list of conditions and the following disclaimer in the documentation
mbed_official 157:90e3acc479a2 12 * and/or other materials provided with the distribution.
mbed_official 157:90e3acc479a2 13 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 157:90e3acc479a2 14 * may be used to endorse or promote products derived from this software
mbed_official 157:90e3acc479a2 15 * without specific prior written permission.
mbed_official 157:90e3acc479a2 16 *
mbed_official 157:90e3acc479a2 17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 157:90e3acc479a2 18 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 157:90e3acc479a2 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 157:90e3acc479a2 20 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 157:90e3acc479a2 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 157:90e3acc479a2 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 157:90e3acc479a2 23 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 157:90e3acc479a2 24 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 157:90e3acc479a2 25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 157:90e3acc479a2 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 157:90e3acc479a2 27 */
mbed_official 157:90e3acc479a2 28 #include "analogout_api.h"
mbed_official 157:90e3acc479a2 29
mbed_official 157:90e3acc479a2 30 #if DEVICE_ANALOGOUT
mbed_official 157:90e3acc479a2 31
mbed_official 157:90e3acc479a2 32 #include "cmsis.h"
mbed_official 157:90e3acc479a2 33 #include "pinmap.h"
mbed_official 157:90e3acc479a2 34 #include "error.h"
mbed_official 157:90e3acc479a2 35
mbed_official 157:90e3acc479a2 36 #define RANGE_12BIT (0xFFF)
mbed_official 157:90e3acc479a2 37
mbed_official 157:90e3acc479a2 38 static const PinMap PinMap_DAC[] = {
mbed_official 157:90e3acc479a2 39 {PA_4, DAC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // DAC_OUT1
mbed_official 157:90e3acc479a2 40 {PA_5, DAC_1, STM_PIN_DATA(GPIO_Mode_AN, GPIO_OType_PP, GPIO_PuPd_NOPULL, 0xFF)}, // DAC_OUT2
mbed_official 157:90e3acc479a2 41 {NC, NC, 0}
mbed_official 157:90e3acc479a2 42 };
mbed_official 157:90e3acc479a2 43
mbed_official 157:90e3acc479a2 44 void analogout_init(dac_t *obj, PinName pin) {
mbed_official 157:90e3acc479a2 45 DAC_TypeDef *dac;
mbed_official 157:90e3acc479a2 46 DAC_InitTypeDef DAC_InitStructure;
mbed_official 157:90e3acc479a2 47
mbed_official 157:90e3acc479a2 48 // Get the peripheral name (DAC_1, ...) from the pin and assign it to the object
mbed_official 157:90e3acc479a2 49 obj->dac = (DACName)pinmap_peripheral(pin, PinMap_DAC);
mbed_official 157:90e3acc479a2 50
mbed_official 157:90e3acc479a2 51 if (obj->dac == (DACName)NC) {
mbed_official 157:90e3acc479a2 52 error("DAC pin mapping failed");
mbed_official 157:90e3acc479a2 53 }
mbed_official 157:90e3acc479a2 54
mbed_official 157:90e3acc479a2 55 dac = (DAC_TypeDef *)(obj->dac);
mbed_official 157:90e3acc479a2 56
mbed_official 157:90e3acc479a2 57 // Configure GPIO
mbed_official 157:90e3acc479a2 58 pinmap_pinout(pin, PinMap_DAC);
mbed_official 157:90e3acc479a2 59
mbed_official 157:90e3acc479a2 60 // Save the channel for the write and read functions
mbed_official 157:90e3acc479a2 61 obj->channel = pin;
mbed_official 157:90e3acc479a2 62
mbed_official 157:90e3acc479a2 63 // Enable DAC clock
mbed_official 157:90e3acc479a2 64 RCC_APB1PeriphClockCmd(RCC_APB1Periph_DAC, ENABLE);
mbed_official 157:90e3acc479a2 65
mbed_official 157:90e3acc479a2 66 // Configure and enable DAC channel
mbed_official 157:90e3acc479a2 67 DAC_StructInit(&DAC_InitStructure);
mbed_official 157:90e3acc479a2 68
mbed_official 157:90e3acc479a2 69 if (obj->channel == PA_4) {
mbed_official 157:90e3acc479a2 70 DAC_Init(dac,DAC_Channel_1, &DAC_InitStructure);
mbed_official 157:90e3acc479a2 71 DAC_Cmd(dac,DAC_Channel_1, ENABLE);
mbed_official 157:90e3acc479a2 72 }
mbed_official 157:90e3acc479a2 73 if (obj->channel == PA_5) {
mbed_official 157:90e3acc479a2 74 DAC_Init(dac,DAC_Channel_2, &DAC_InitStructure);
mbed_official 157:90e3acc479a2 75 DAC_Cmd(dac,DAC_Channel_2, ENABLE);
mbed_official 157:90e3acc479a2 76 }
mbed_official 157:90e3acc479a2 77
mbed_official 157:90e3acc479a2 78 analogout_write_u16(obj, 0);
mbed_official 157:90e3acc479a2 79 }
mbed_official 157:90e3acc479a2 80
mbed_official 157:90e3acc479a2 81 void analogout_free(dac_t *obj) {
mbed_official 157:90e3acc479a2 82 }
mbed_official 157:90e3acc479a2 83
mbed_official 157:90e3acc479a2 84 static inline void dac_write(dac_t *obj, uint16_t value) {
mbed_official 157:90e3acc479a2 85 DAC_TypeDef *dac = (DAC_TypeDef *)(obj->dac);
mbed_official 157:90e3acc479a2 86 if (obj->channel == PA_4) {
mbed_official 157:90e3acc479a2 87 DAC_SetChannel1Data(dac,DAC_Align_12b_R, value);
mbed_official 157:90e3acc479a2 88 }
mbed_official 157:90e3acc479a2 89 if (obj->channel == PA_5) {
mbed_official 157:90e3acc479a2 90 DAC_SetChannel2Data(dac,DAC_Align_12b_R, value);
mbed_official 157:90e3acc479a2 91 }
mbed_official 157:90e3acc479a2 92 }
mbed_official 157:90e3acc479a2 93
mbed_official 157:90e3acc479a2 94 static inline int dac_read(dac_t *obj) {
mbed_official 157:90e3acc479a2 95 DAC_TypeDef *dac = (DAC_TypeDef *)(obj->dac);
mbed_official 157:90e3acc479a2 96 if (obj->channel == PA_4) {
mbed_official 157:90e3acc479a2 97 return (int)DAC_GetDataOutputValue(dac,DAC_Channel_1);
mbed_official 157:90e3acc479a2 98 }
mbed_official 157:90e3acc479a2 99 if (obj->channel == PA_5) {
mbed_official 157:90e3acc479a2 100 return (int)DAC_GetDataOutputValue(dac,DAC_Channel_2);
mbed_official 157:90e3acc479a2 101 }
mbed_official 157:90e3acc479a2 102 return 0;
mbed_official 157:90e3acc479a2 103 }
mbed_official 157:90e3acc479a2 104
mbed_official 157:90e3acc479a2 105 void analogout_write(dac_t *obj, float value) {
mbed_official 157:90e3acc479a2 106 if (value < 0.0f) {
mbed_official 157:90e3acc479a2 107 dac_write(obj, 0); // Min value
mbed_official 157:90e3acc479a2 108 } else if (value > 1.0f) {
mbed_official 157:90e3acc479a2 109 dac_write(obj, (uint16_t)RANGE_12BIT); // Max value
mbed_official 157:90e3acc479a2 110 } else {
mbed_official 157:90e3acc479a2 111 dac_write(obj, (uint16_t)(value * (float)RANGE_12BIT));
mbed_official 157:90e3acc479a2 112 }
mbed_official 157:90e3acc479a2 113 }
mbed_official 157:90e3acc479a2 114
mbed_official 157:90e3acc479a2 115 void analogout_write_u16(dac_t *obj, uint16_t value) {
mbed_official 157:90e3acc479a2 116 if (value > (uint16_t)RANGE_12BIT) {
mbed_official 157:90e3acc479a2 117 dac_write(obj, (uint16_t)RANGE_12BIT); // Max value
mbed_official 157:90e3acc479a2 118 }
mbed_official 157:90e3acc479a2 119 else {
mbed_official 157:90e3acc479a2 120 dac_write(obj, value);
mbed_official 157:90e3acc479a2 121 }
mbed_official 157:90e3acc479a2 122 }
mbed_official 157:90e3acc479a2 123
mbed_official 157:90e3acc479a2 124 float analogout_read(dac_t *obj) {
mbed_official 157:90e3acc479a2 125 uint32_t value = dac_read(obj);
mbed_official 157:90e3acc479a2 126 return (float)value * (1.0f / (float)RANGE_12BIT);
mbed_official 157:90e3acc479a2 127 }
mbed_official 157:90e3acc479a2 128
mbed_official 157:90e3acc479a2 129 uint16_t analogout_read_u16(dac_t *obj) {
mbed_official 157:90e3acc479a2 130 return (uint16_t)dac_read(obj);
mbed_official 157:90e3acc479a2 131 }
mbed_official 157:90e3acc479a2 132
mbed_official 157:90e3acc479a2 133 #endif // DEVICE_ANALOGOUT