Iftikhar Aziz / mbed-dev

4545

Dependents:   LSS_Rev_1

Fork of mbed-dev by Umar Naeem

targets/TARGET_STM/TARGET_STM32F4/analogout_api.c@166:33361e55dd8c, 2017-08-23 (annotated)

Committer:
iftaziz
Date:
Wed Aug 23 10:32:38 2017 +0000
Revision:
166:33361e55dd8c
Parent:
149:156823d33999 
r1

Who changed what in which revision?

UserRevisionLine numberNew contents of line
<> 144:ef7eb2e8f9f7 1 /* mbed Microcontroller Library
<> 144:ef7eb2e8f9f7 2 * Copyright (c) 2015, STMicroelectronics
<> 144:ef7eb2e8f9f7 3 * All rights reserved.
<> 144:ef7eb2e8f9f7 4 *
<> 144:ef7eb2e8f9f7 5 * Redistribution and use in source and binary forms, with or without
<> 144:ef7eb2e8f9f7 6 * modification, are permitted provided that the following conditions are met:
<> 144:ef7eb2e8f9f7 7 *
<> 144:ef7eb2e8f9f7 8 * 1. Redistributions of source code must retain the above copyright notice,
<> 144:ef7eb2e8f9f7 9 * this list of conditions and the following disclaimer.
<> 144:ef7eb2e8f9f7 10 * 2. Redistributions in binary form must reproduce the above copyright notice,
<> 144:ef7eb2e8f9f7 11 * this list of conditions and the following disclaimer in the documentation
<> 144:ef7eb2e8f9f7 12 * and/or other materials provided with the distribution.
<> 144:ef7eb2e8f9f7 13 * 3. Neither the name of STMicroelectronics nor the names of its contributors
<> 144:ef7eb2e8f9f7 14 * may be used to endorse or promote products derived from this software
<> 144:ef7eb2e8f9f7 15 * without specific prior written permission.
<> 144:ef7eb2e8f9f7 16 *
<> 144:ef7eb2e8f9f7 17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
<> 144:ef7eb2e8f9f7 18 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
<> 144:ef7eb2e8f9f7 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
<> 144:ef7eb2e8f9f7 20 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
<> 144:ef7eb2e8f9f7 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
<> 144:ef7eb2e8f9f7 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
<> 144:ef7eb2e8f9f7 23 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
<> 144:ef7eb2e8f9f7 24 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
<> 144:ef7eb2e8f9f7 25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
<> 144:ef7eb2e8f9f7 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
<> 144:ef7eb2e8f9f7 27 */
<> 144:ef7eb2e8f9f7 28 #include "analogout_api.h"
<> 144:ef7eb2e8f9f7 29
<> 144:ef7eb2e8f9f7 30 #if DEVICE_ANALOGOUT
<> 144:ef7eb2e8f9f7 31
<> 144:ef7eb2e8f9f7 32 #include "cmsis.h"
<> 144:ef7eb2e8f9f7 33 #include "pinmap.h"
<> 144:ef7eb2e8f9f7 34 #include "mbed_error.h"
<> 144:ef7eb2e8f9f7 35 #include "stm32f4xx_hal.h"
<> 144:ef7eb2e8f9f7 36 #include "PeripheralPins.h"
<> 144:ef7eb2e8f9f7 37
<> 144:ef7eb2e8f9f7 38 #define DAC_RANGE (0xFFF) // 12 bits
<> 144:ef7eb2e8f9f7 39 #define DAC_NB_BITS (12)
<> 144:ef7eb2e8f9f7 40
<> 144:ef7eb2e8f9f7 41 DAC_HandleTypeDef DacHandle;
<> 144:ef7eb2e8f9f7 42 static DAC_ChannelConfTypeDef sConfig;
<> 144:ef7eb2e8f9f7 43
<> 144:ef7eb2e8f9f7 44 void analogout_init(dac_t *obj, PinName pin) {
<> 144:ef7eb2e8f9f7 45 uint32_t channel ;
<> 144:ef7eb2e8f9f7 46 HAL_StatusTypeDef status;
<> 144:ef7eb2e8f9f7 47
<> 144:ef7eb2e8f9f7 48 // Get the peripheral name (DAC_1, ...) from the pin and assign it to the object
<> 144:ef7eb2e8f9f7 49 obj->dac = (DACName)pinmap_peripheral(pin, PinMap_DAC);
<> 144:ef7eb2e8f9f7 50 // Get the functions (dac channel) from the pin and assign it to the object
<> 144:ef7eb2e8f9f7 51 uint32_t function = pinmap_function(pin, PinMap_DAC);
<> 144:ef7eb2e8f9f7 52 MBED_ASSERT(function != (uint32_t)NC);
<> 144:ef7eb2e8f9f7 53 // Save the channel for the write and read functions
<> 144:ef7eb2e8f9f7 54 obj->channel = STM_PIN_CHANNEL(function);
<> 144:ef7eb2e8f9f7 55
<> 144:ef7eb2e8f9f7 56 if (obj->dac == (DACName)NC) {
<> 144:ef7eb2e8f9f7 57 error("DAC pin mapping failed");
<> 144:ef7eb2e8f9f7 58 }
<> 144:ef7eb2e8f9f7 59
<> 144:ef7eb2e8f9f7 60 // Configure GPIO
<> 144:ef7eb2e8f9f7 61 pinmap_pinout(pin, PinMap_DAC);
<> 144:ef7eb2e8f9f7 62
<> 144:ef7eb2e8f9f7 63 __GPIOA_CLK_ENABLE();
<> 144:ef7eb2e8f9f7 64
<> 144:ef7eb2e8f9f7 65 __DAC_CLK_ENABLE();
<> 144:ef7eb2e8f9f7 66
<> 144:ef7eb2e8f9f7 67 DacHandle.Instance = DAC;
<> 144:ef7eb2e8f9f7 68
<> 144:ef7eb2e8f9f7 69 status = HAL_DAC_Init(&DacHandle);
<> 144:ef7eb2e8f9f7 70 if ( status != HAL_OK ) {
<> 144:ef7eb2e8f9f7 71 error("HAL_DAC_Init failed");
<> 144:ef7eb2e8f9f7 72 }
<> 144:ef7eb2e8f9f7 73
<> 144:ef7eb2e8f9f7 74 sConfig.DAC_Trigger = DAC_TRIGGER_NONE;
<> 144:ef7eb2e8f9f7 75 sConfig.DAC_OutputBuffer = DAC_OUTPUTBUFFER_ENABLE;
<> 144:ef7eb2e8f9f7 76
<> 144:ef7eb2e8f9f7 77 if (obj->channel == 1) {
<> 144:ef7eb2e8f9f7 78 channel = DAC_CHANNEL_1;
<> 144:ef7eb2e8f9f7 79 } else {
<> 144:ef7eb2e8f9f7 80 channel = DAC_CHANNEL_2;
<> 144:ef7eb2e8f9f7 81 }
<> 144:ef7eb2e8f9f7 82
<> 144:ef7eb2e8f9f7 83 if (HAL_DAC_ConfigChannel(&DacHandle, &sConfig, channel) != HAL_OK) {
<> 144:ef7eb2e8f9f7 84 error("HAL_DAC_ConfigChannel failed");
<> 144:ef7eb2e8f9f7 85 }
<> 144:ef7eb2e8f9f7 86
<> 144:ef7eb2e8f9f7 87 if (HAL_DAC_Start(&DacHandle, channel) != HAL_OK) {
<> 144:ef7eb2e8f9f7 88 error("HAL_DAC_Start failed");
<> 144:ef7eb2e8f9f7 89 }
<> 144:ef7eb2e8f9f7 90
<> 144:ef7eb2e8f9f7 91 if (HAL_DAC_SetValue(&DacHandle, channel, DAC_ALIGN_12B_R, 0x000) != HAL_OK) {
<> 144:ef7eb2e8f9f7 92 error("HAL_DAC_SetValue failed");
<> 144:ef7eb2e8f9f7 93 }
<> 144:ef7eb2e8f9f7 94
<> 144:ef7eb2e8f9f7 95 }
<> 144:ef7eb2e8f9f7 96
<> 144:ef7eb2e8f9f7 97 void analogout_free(dac_t *obj) {
<> 144:ef7eb2e8f9f7 98 }
<> 144:ef7eb2e8f9f7 99
<> 144:ef7eb2e8f9f7 100 static inline void dac_write(dac_t *obj, int value) {
<> 144:ef7eb2e8f9f7 101 HAL_StatusTypeDef status = HAL_ERROR;
<> 144:ef7eb2e8f9f7 102
<> 144:ef7eb2e8f9f7 103 if (obj->channel == 1) {
<> 144:ef7eb2e8f9f7 104 status = HAL_DAC_SetValue(&DacHandle, DAC_CHANNEL_1, DAC_ALIGN_12B_R, (value & DAC_RANGE));
<> 144:ef7eb2e8f9f7 105 } else if (obj->channel == 2) {
<> 144:ef7eb2e8f9f7 106 status = HAL_DAC_SetValue(&DacHandle, DAC_CHANNEL_2, DAC_ALIGN_12B_R, (value & DAC_RANGE));
<> 144:ef7eb2e8f9f7 107 }
<> 144:ef7eb2e8f9f7 108
<> 144:ef7eb2e8f9f7 109 if ( status != HAL_OK ) {
<> 144:ef7eb2e8f9f7 110 error("DAC pin mapping failed");
<> 144:ef7eb2e8f9f7 111 }
<> 144:ef7eb2e8f9f7 112 }
<> 144:ef7eb2e8f9f7 113
<> 144:ef7eb2e8f9f7 114 static inline int dac_read(dac_t *obj) {
<> 144:ef7eb2e8f9f7 115 if (obj->channel == 1) {
<> 144:ef7eb2e8f9f7 116 return (int)HAL_DAC_GetValue(&DacHandle, DAC_CHANNEL_1);
<> 144:ef7eb2e8f9f7 117 } else if (obj->channel == 2) {
<> 144:ef7eb2e8f9f7 118 return (int)HAL_DAC_GetValue(&DacHandle, DAC_CHANNEL_2);
<> 144:ef7eb2e8f9f7 119 }
<> 144:ef7eb2e8f9f7 120 return 0; /* Just silented warning */
<> 144:ef7eb2e8f9f7 121 }
<> 144:ef7eb2e8f9f7 122
<> 144:ef7eb2e8f9f7 123 void analogout_write(dac_t *obj, float value) {
<> 144:ef7eb2e8f9f7 124 if (value < 0.0f) {
<> 144:ef7eb2e8f9f7 125 dac_write(obj, 0); // Min value
<> 144:ef7eb2e8f9f7 126 } else if (value > 1.0f) {
<> 144:ef7eb2e8f9f7 127 dac_write(obj, (int)DAC_RANGE); // Max value
<> 144:ef7eb2e8f9f7 128 } else {
<> 144:ef7eb2e8f9f7 129 dac_write(obj, (int)(value * (float)DAC_RANGE));
<> 144:ef7eb2e8f9f7 130 }
<> 144:ef7eb2e8f9f7 131 }
<> 144:ef7eb2e8f9f7 132
<> 144:ef7eb2e8f9f7 133 void analogout_write_u16(dac_t *obj, uint16_t value) {
<> 144:ef7eb2e8f9f7 134 dac_write(obj, value >> (16 - DAC_NB_BITS));
<> 144:ef7eb2e8f9f7 135 }
<> 144:ef7eb2e8f9f7 136
<> 144:ef7eb2e8f9f7 137 float analogout_read(dac_t *obj) {
<> 144:ef7eb2e8f9f7 138 uint32_t value = dac_read(obj);
<> 144:ef7eb2e8f9f7 139 return (float)value * (1.0f / (float)DAC_RANGE);
<> 144:ef7eb2e8f9f7 140 }
<> 144:ef7eb2e8f9f7 141
<> 144:ef7eb2e8f9f7 142 uint16_t analogout_read_u16(dac_t *obj) {
<> 144:ef7eb2e8f9f7 143 uint32_t value = dac_read(obj);
<> 144:ef7eb2e8f9f7 144 return (value << 4) | ((value >> 8) & 0x000F); // Conversion from 12 to 16 bits
<> 144:ef7eb2e8f9f7 145 }
<> 144:ef7eb2e8f9f7 146
<> 144:ef7eb2e8f9f7 147 #endif // DEVICE_ANALOGOUT