MacroRat / MouseCode

Mouse code for the MacroRat

Dependencies:   ITG3200 QEI

mbed-dev/targets/TARGET_STM/TARGET_STM32F4/analogout_api.c@18:6a4db94011d3, 2017-05-14 (annotated)

Committer:
sahilmgandhi
Date:
Sun May 14 23:18:57 2017 +0000
Revision:
18:6a4db94011d3
Publishing again

Who changed what in which revision?

UserRevisionLine numberNew contents of line
sahilmgandhi 18:6a4db94011d3 1 /* mbed Microcontroller Library
sahilmgandhi 18:6a4db94011d3 2 * Copyright (c) 2015, STMicroelectronics
sahilmgandhi 18:6a4db94011d3 3 * All rights reserved.
sahilmgandhi 18:6a4db94011d3 4 *
sahilmgandhi 18:6a4db94011d3 5 * Redistribution and use in source and binary forms, with or without
sahilmgandhi 18:6a4db94011d3 6 * modification, are permitted provided that the following conditions are met:
sahilmgandhi 18:6a4db94011d3 7 *
sahilmgandhi 18:6a4db94011d3 8 * 1. Redistributions of source code must retain the above copyright notice,
sahilmgandhi 18:6a4db94011d3 9 * this list of conditions and the following disclaimer.
sahilmgandhi 18:6a4db94011d3 10 * 2. Redistributions in binary form must reproduce the above copyright notice,
sahilmgandhi 18:6a4db94011d3 11 * this list of conditions and the following disclaimer in the documentation
sahilmgandhi 18:6a4db94011d3 12 * and/or other materials provided with the distribution.
sahilmgandhi 18:6a4db94011d3 13 * 3. Neither the name of STMicroelectronics nor the names of its contributors
sahilmgandhi 18:6a4db94011d3 14 * may be used to endorse or promote products derived from this software
sahilmgandhi 18:6a4db94011d3 15 * without specific prior written permission.
sahilmgandhi 18:6a4db94011d3 16 *
sahilmgandhi 18:6a4db94011d3 17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
sahilmgandhi 18:6a4db94011d3 18 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
sahilmgandhi 18:6a4db94011d3 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
sahilmgandhi 18:6a4db94011d3 20 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
sahilmgandhi 18:6a4db94011d3 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
sahilmgandhi 18:6a4db94011d3 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
sahilmgandhi 18:6a4db94011d3 23 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
sahilmgandhi 18:6a4db94011d3 24 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
sahilmgandhi 18:6a4db94011d3 25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
sahilmgandhi 18:6a4db94011d3 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
sahilmgandhi 18:6a4db94011d3 27 */
sahilmgandhi 18:6a4db94011d3 28 #include "analogout_api.h"
sahilmgandhi 18:6a4db94011d3 29
sahilmgandhi 18:6a4db94011d3 30 #if DEVICE_ANALOGOUT
sahilmgandhi 18:6a4db94011d3 31
sahilmgandhi 18:6a4db94011d3 32 #include "cmsis.h"
sahilmgandhi 18:6a4db94011d3 33 #include "pinmap.h"
sahilmgandhi 18:6a4db94011d3 34 #include "mbed_error.h"
sahilmgandhi 18:6a4db94011d3 35 #include "stm32f4xx_hal.h"
sahilmgandhi 18:6a4db94011d3 36 #include "PeripheralPins.h"
sahilmgandhi 18:6a4db94011d3 37
sahilmgandhi 18:6a4db94011d3 38 #define DAC_RANGE (0xFFF) // 12 bits
sahilmgandhi 18:6a4db94011d3 39 #define DAC_NB_BITS (12)
sahilmgandhi 18:6a4db94011d3 40
sahilmgandhi 18:6a4db94011d3 41 DAC_HandleTypeDef DacHandle;
sahilmgandhi 18:6a4db94011d3 42 static DAC_ChannelConfTypeDef sConfig;
sahilmgandhi 18:6a4db94011d3 43
sahilmgandhi 18:6a4db94011d3 44 void analogout_init(dac_t *obj, PinName pin) {
sahilmgandhi 18:6a4db94011d3 45 uint32_t channel ;
sahilmgandhi 18:6a4db94011d3 46 HAL_StatusTypeDef status;
sahilmgandhi 18:6a4db94011d3 47
sahilmgandhi 18:6a4db94011d3 48 // Get the peripheral name (DAC_1, ...) from the pin and assign it to the object
sahilmgandhi 18:6a4db94011d3 49 obj->dac = (DACName)pinmap_peripheral(pin, PinMap_DAC);
sahilmgandhi 18:6a4db94011d3 50 // Get the functions (dac channel) from the pin and assign it to the object
sahilmgandhi 18:6a4db94011d3 51 uint32_t function = pinmap_function(pin, PinMap_DAC);
sahilmgandhi 18:6a4db94011d3 52 MBED_ASSERT(function != (uint32_t)NC);
sahilmgandhi 18:6a4db94011d3 53 // Save the channel for the write and read functions
sahilmgandhi 18:6a4db94011d3 54 obj->channel = STM_PIN_CHANNEL(function);
sahilmgandhi 18:6a4db94011d3 55
sahilmgandhi 18:6a4db94011d3 56 if (obj->dac == (DACName)NC) {
sahilmgandhi 18:6a4db94011d3 57 error("DAC pin mapping failed");
sahilmgandhi 18:6a4db94011d3 58 }
sahilmgandhi 18:6a4db94011d3 59
sahilmgandhi 18:6a4db94011d3 60 // Configure GPIO
sahilmgandhi 18:6a4db94011d3 61 pinmap_pinout(pin, PinMap_DAC);
sahilmgandhi 18:6a4db94011d3 62
sahilmgandhi 18:6a4db94011d3 63 __GPIOA_CLK_ENABLE();
sahilmgandhi 18:6a4db94011d3 64
sahilmgandhi 18:6a4db94011d3 65 __DAC_CLK_ENABLE();
sahilmgandhi 18:6a4db94011d3 66
sahilmgandhi 18:6a4db94011d3 67 DacHandle.Instance = DAC;
sahilmgandhi 18:6a4db94011d3 68
sahilmgandhi 18:6a4db94011d3 69 status = HAL_DAC_Init(&DacHandle);
sahilmgandhi 18:6a4db94011d3 70 if ( status != HAL_OK ) {
sahilmgandhi 18:6a4db94011d3 71 error("HAL_DAC_Init failed");
sahilmgandhi 18:6a4db94011d3 72 }
sahilmgandhi 18:6a4db94011d3 73
sahilmgandhi 18:6a4db94011d3 74 sConfig.DAC_Trigger = DAC_TRIGGER_NONE;
sahilmgandhi 18:6a4db94011d3 75 sConfig.DAC_OutputBuffer = DAC_OUTPUTBUFFER_ENABLE;
sahilmgandhi 18:6a4db94011d3 76
sahilmgandhi 18:6a4db94011d3 77 if (obj->channel == 1) {
sahilmgandhi 18:6a4db94011d3 78 channel = DAC_CHANNEL_1;
sahilmgandhi 18:6a4db94011d3 79 } else {
sahilmgandhi 18:6a4db94011d3 80 channel = DAC_CHANNEL_2;
sahilmgandhi 18:6a4db94011d3 81 }
sahilmgandhi 18:6a4db94011d3 82
sahilmgandhi 18:6a4db94011d3 83 if (HAL_DAC_ConfigChannel(&DacHandle, &sConfig, channel) != HAL_OK) {
sahilmgandhi 18:6a4db94011d3 84 error("HAL_DAC_ConfigChannel failed");
sahilmgandhi 18:6a4db94011d3 85 }
sahilmgandhi 18:6a4db94011d3 86
sahilmgandhi 18:6a4db94011d3 87 if (HAL_DAC_Start(&DacHandle, channel) != HAL_OK) {
sahilmgandhi 18:6a4db94011d3 88 error("HAL_DAC_Start failed");
sahilmgandhi 18:6a4db94011d3 89 }
sahilmgandhi 18:6a4db94011d3 90
sahilmgandhi 18:6a4db94011d3 91 if (HAL_DAC_SetValue(&DacHandle, channel, DAC_ALIGN_12B_R, 0x000) != HAL_OK) {
sahilmgandhi 18:6a4db94011d3 92 error("HAL_DAC_SetValue failed");
sahilmgandhi 18:6a4db94011d3 93 }
sahilmgandhi 18:6a4db94011d3 94
sahilmgandhi 18:6a4db94011d3 95 }
sahilmgandhi 18:6a4db94011d3 96
sahilmgandhi 18:6a4db94011d3 97 void analogout_free(dac_t *obj) {
sahilmgandhi 18:6a4db94011d3 98 }
sahilmgandhi 18:6a4db94011d3 99
sahilmgandhi 18:6a4db94011d3 100 static inline void dac_write(dac_t *obj, int value) {
sahilmgandhi 18:6a4db94011d3 101 HAL_StatusTypeDef status = HAL_ERROR;
sahilmgandhi 18:6a4db94011d3 102
sahilmgandhi 18:6a4db94011d3 103 if (obj->channel == 1) {
sahilmgandhi 18:6a4db94011d3 104 status = HAL_DAC_SetValue(&DacHandle, DAC_CHANNEL_1, DAC_ALIGN_12B_R, (value & DAC_RANGE));
sahilmgandhi 18:6a4db94011d3 105 } else if (obj->channel == 2) {
sahilmgandhi 18:6a4db94011d3 106 status = HAL_DAC_SetValue(&DacHandle, DAC_CHANNEL_2, DAC_ALIGN_12B_R, (value & DAC_RANGE));
sahilmgandhi 18:6a4db94011d3 107 }
sahilmgandhi 18:6a4db94011d3 108
sahilmgandhi 18:6a4db94011d3 109 if ( status != HAL_OK ) {
sahilmgandhi 18:6a4db94011d3 110 error("DAC pin mapping failed");
sahilmgandhi 18:6a4db94011d3 111 }
sahilmgandhi 18:6a4db94011d3 112 }
sahilmgandhi 18:6a4db94011d3 113
sahilmgandhi 18:6a4db94011d3 114 static inline int dac_read(dac_t *obj) {
sahilmgandhi 18:6a4db94011d3 115 if (obj->channel == 1) {
sahilmgandhi 18:6a4db94011d3 116 return (int)HAL_DAC_GetValue(&DacHandle, DAC_CHANNEL_1);
sahilmgandhi 18:6a4db94011d3 117 } else if (obj->channel == 2) {
sahilmgandhi 18:6a4db94011d3 118 return (int)HAL_DAC_GetValue(&DacHandle, DAC_CHANNEL_2);
sahilmgandhi 18:6a4db94011d3 119 }
sahilmgandhi 18:6a4db94011d3 120 return 0; /* Just silented warning */
sahilmgandhi 18:6a4db94011d3 121 }
sahilmgandhi 18:6a4db94011d3 122
sahilmgandhi 18:6a4db94011d3 123 void analogout_write(dac_t *obj, float value) {
sahilmgandhi 18:6a4db94011d3 124 if (value < 0.0f) {
sahilmgandhi 18:6a4db94011d3 125 dac_write(obj, 0); // Min value
sahilmgandhi 18:6a4db94011d3 126 } else if (value > 1.0f) {
sahilmgandhi 18:6a4db94011d3 127 dac_write(obj, (int)DAC_RANGE); // Max value
sahilmgandhi 18:6a4db94011d3 128 } else {
sahilmgandhi 18:6a4db94011d3 129 dac_write(obj, (int)(value * (float)DAC_RANGE));
sahilmgandhi 18:6a4db94011d3 130 }
sahilmgandhi 18:6a4db94011d3 131 }
sahilmgandhi 18:6a4db94011d3 132
sahilmgandhi 18:6a4db94011d3 133 void analogout_write_u16(dac_t *obj, uint16_t value) {
sahilmgandhi 18:6a4db94011d3 134 dac_write(obj, value >> (16 - DAC_NB_BITS));
sahilmgandhi 18:6a4db94011d3 135 }
sahilmgandhi 18:6a4db94011d3 136
sahilmgandhi 18:6a4db94011d3 137 float analogout_read(dac_t *obj) {
sahilmgandhi 18:6a4db94011d3 138 uint32_t value = dac_read(obj);
sahilmgandhi 18:6a4db94011d3 139 return (float)value * (1.0f / (float)DAC_RANGE);
sahilmgandhi 18:6a4db94011d3 140 }
sahilmgandhi 18:6a4db94011d3 141
sahilmgandhi 18:6a4db94011d3 142 uint16_t analogout_read_u16(dac_t *obj) {
sahilmgandhi 18:6a4db94011d3 143 uint32_t value = dac_read(obj);
sahilmgandhi 18:6a4db94011d3 144 return (value << 4) | ((value >> 8) & 0x000F); // Conversion from 12 to 16 bits
sahilmgandhi 18:6a4db94011d3 145 }
sahilmgandhi 18:6a4db94011d3 146
sahilmgandhi 18:6a4db94011d3 147 #endif // DEVICE_ANALOGOUT