shao ziyang / mbed-src-kl05

mbed library sources

Dependents:   frdm_kl05z_gpio_test

Fork of mbed-src by mbed official

targets/hal/TARGET_STM/TARGET_NUCLEO_F334R8/analogout_api.c@323:9e901b0a5aa1, 2014-09-13 (annotated)

Committer:
shaoziyang
Date:
Sat Sep 13 14:25:46 2014 +0000
Revision:
323:9e901b0a5aa1
Parent:
285:31249416b6f9 
test with CLOCK_SETUP = 0

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 237:f3da66175598 1 /* mbed Microcontroller Library
mbed_official 237:f3da66175598 2 * Copyright (c) 2014, STMicroelectronics
mbed_official 237:f3da66175598 3 * All rights reserved.
mbed_official 237:f3da66175598 4 *
mbed_official 237:f3da66175598 5 * Redistribution and use in source and binary forms, with or without
mbed_official 237:f3da66175598 6 * modification, are permitted provided that the following conditions are met:
mbed_official 237:f3da66175598 7 *
mbed_official 237:f3da66175598 8 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 237:f3da66175598 9 * this list of conditions and the following disclaimer.
mbed_official 237:f3da66175598 10 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 237:f3da66175598 11 * this list of conditions and the following disclaimer in the documentation
mbed_official 237:f3da66175598 12 * and/or other materials provided with the distribution.
mbed_official 237:f3da66175598 13 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 237:f3da66175598 14 * may be used to endorse or promote products derived from this software
mbed_official 237:f3da66175598 15 * without specific prior written permission.
mbed_official 237:f3da66175598 16 *
mbed_official 237:f3da66175598 17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 237:f3da66175598 18 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 237:f3da66175598 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 237:f3da66175598 20 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 237:f3da66175598 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 237:f3da66175598 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 237:f3da66175598 23 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 237:f3da66175598 24 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 237:f3da66175598 25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 237:f3da66175598 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 237:f3da66175598 27 */
mbed_official 237:f3da66175598 28 #include "mbed_assert.h"
mbed_official 237:f3da66175598 29 #include "analogout_api.h"
mbed_official 237:f3da66175598 30
mbed_official 237:f3da66175598 31 #if DEVICE_ANALOGOUT
mbed_official 237:f3da66175598 32
mbed_official 237:f3da66175598 33 #include "cmsis.h"
mbed_official 237:f3da66175598 34 #include "pinmap.h"
mbed_official 285:31249416b6f9 35 #include "mbed_error.h"
mbed_official 237:f3da66175598 36
mbed_official 237:f3da66175598 37 #define DAC_RANGE (0xFFF) // 12 bits
mbed_official 237:f3da66175598 38
mbed_official 237:f3da66175598 39 static const PinMap PinMap_DAC[] = {
mbed_official 237:f3da66175598 40 {PA_4, DAC_1, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0)}, // DAC1_OUT1
mbed_official 237:f3da66175598 41 {PA_5, DAC_1, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0)}, // DAC1_OUT2 (Warning: LED1 is also on this pin)
mbed_official 237:f3da66175598 42 {PA_6, DAC_2, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0)}, // DAC2_OUT1
mbed_official 237:f3da66175598 43 {NC, NC, 0}
mbed_official 237:f3da66175598 44 };
mbed_official 237:f3da66175598 45
mbed_official 237:f3da66175598 46 static DAC_HandleTypeDef DacHandle;
mbed_official 237:f3da66175598 47
mbed_official 237:f3da66175598 48 // These variables are used for the "free" function
mbed_official 237:f3da66175598 49 static int pa4_used = 0;
mbed_official 237:f3da66175598 50 static int pa5_used = 0;
mbed_official 237:f3da66175598 51
mbed_official 237:f3da66175598 52 void analogout_init(dac_t *obj, PinName pin)
mbed_official 237:f3da66175598 53 {
mbed_official 237:f3da66175598 54 DAC_ChannelConfTypeDef sConfig;
mbed_official 237:f3da66175598 55
mbed_official 237:f3da66175598 56 // Get the peripheral name (DAC_1, DAC_2...) from the pin and assign it to the object
mbed_official 237:f3da66175598 57 obj->dac = (DACName)pinmap_peripheral(pin, PinMap_DAC);
mbed_official 237:f3da66175598 58 MBED_ASSERT(obj->dac != (DACName)NC);
mbed_official 237:f3da66175598 59
mbed_official 237:f3da66175598 60 // Configure GPIO
mbed_official 237:f3da66175598 61 pinmap_pinout(pin, PinMap_DAC);
mbed_official 237:f3da66175598 62
mbed_official 237:f3da66175598 63 // Save the pin for future use
mbed_official 237:f3da66175598 64 obj->pin = pin;
mbed_official 237:f3da66175598 65
mbed_official 237:f3da66175598 66 // Enable DAC clock
mbed_official 237:f3da66175598 67 if (obj->dac == DAC_1) {
mbed_official 237:f3da66175598 68 __DAC1_CLK_ENABLE();
mbed_official 237:f3da66175598 69 }
mbed_official 237:f3da66175598 70 if (obj->dac == DAC_2) {
mbed_official 237:f3da66175598 71 __DAC2_CLK_ENABLE();
mbed_official 237:f3da66175598 72 }
mbed_official 237:f3da66175598 73
mbed_official 237:f3da66175598 74 // Configure DAC
mbed_official 237:f3da66175598 75 DacHandle.Instance = (DAC_TypeDef *)(obj->dac);
mbed_official 237:f3da66175598 76
mbed_official 237:f3da66175598 77 sConfig.DAC_Trigger = DAC_TRIGGER_NONE;
mbed_official 237:f3da66175598 78 sConfig.DAC_OutputBuffer = DAC_OUTPUTBUFFER_DISABLE;
mbed_official 237:f3da66175598 79
mbed_official 237:f3da66175598 80 if (pin == PA_4) {
mbed_official 237:f3da66175598 81 HAL_DAC_ConfigChannel(&DacHandle, &sConfig, DAC_CHANNEL_1);
mbed_official 237:f3da66175598 82 pa4_used = 1;
mbed_official 237:f3da66175598 83 }
mbed_official 237:f3da66175598 84
mbed_official 237:f3da66175598 85 if (pin == PA_5) {
mbed_official 237:f3da66175598 86 HAL_DAC_ConfigChannel(&DacHandle, &sConfig, DAC_CHANNEL_2);
mbed_official 237:f3da66175598 87 pa5_used = 1;
mbed_official 237:f3da66175598 88 }
mbed_official 237:f3da66175598 89
mbed_official 237:f3da66175598 90 if (pin == PA_6) {
mbed_official 237:f3da66175598 91 HAL_DAC_ConfigChannel(&DacHandle, &sConfig, DAC_CHANNEL_1);
mbed_official 237:f3da66175598 92 }
mbed_official 237:f3da66175598 93
mbed_official 237:f3da66175598 94 analogout_write_u16(obj, 0);
mbed_official 237:f3da66175598 95 }
mbed_official 237:f3da66175598 96
mbed_official 237:f3da66175598 97 void analogout_free(dac_t *obj)
mbed_official 237:f3da66175598 98 {
mbed_official 237:f3da66175598 99 // Reset DAC and disable clock
mbed_official 237:f3da66175598 100 if (obj->pin == PA_4) pa4_used = 0;
mbed_official 237:f3da66175598 101 if (obj->pin == PA_5) pa5_used = 0;
mbed_official 237:f3da66175598 102
mbed_official 237:f3da66175598 103 if ((pa4_used == 0) && (pa5_used == 0)) {
mbed_official 237:f3da66175598 104 __DAC1_FORCE_RESET();
mbed_official 237:f3da66175598 105 __DAC1_RELEASE_RESET();
mbed_official 237:f3da66175598 106 __DAC1_CLK_DISABLE();
mbed_official 237:f3da66175598 107 }
mbed_official 237:f3da66175598 108
mbed_official 237:f3da66175598 109 if (obj->pin == PA_6) {
mbed_official 237:f3da66175598 110 __DAC2_FORCE_RESET();
mbed_official 237:f3da66175598 111 __DAC2_RELEASE_RESET();
mbed_official 237:f3da66175598 112 __DAC2_CLK_DISABLE();
mbed_official 237:f3da66175598 113 }
mbed_official 237:f3da66175598 114
mbed_official 237:f3da66175598 115 // Configure GPIO
mbed_official 237:f3da66175598 116 pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
mbed_official 237:f3da66175598 117 }
mbed_official 237:f3da66175598 118
mbed_official 237:f3da66175598 119 static inline void dac_write(dac_t *obj, uint16_t value)
mbed_official 237:f3da66175598 120 {
mbed_official 237:f3da66175598 121 if ((obj->pin == PA_4) || (obj->pin == PA_6)) {
mbed_official 237:f3da66175598 122 HAL_DAC_SetValue(&DacHandle, DAC_CHANNEL_1, DAC_ALIGN_12B_R, value);
mbed_official 237:f3da66175598 123 HAL_DAC_Start(&DacHandle, DAC_CHANNEL_1);
mbed_official 237:f3da66175598 124 }
mbed_official 237:f3da66175598 125
mbed_official 237:f3da66175598 126 if (obj->pin == PA_5) {
mbed_official 237:f3da66175598 127 HAL_DAC_SetValue(&DacHandle, DAC_CHANNEL_2, DAC_ALIGN_12B_R, value);
mbed_official 237:f3da66175598 128 HAL_DAC_Start(&DacHandle, DAC_CHANNEL_2);
mbed_official 237:f3da66175598 129 }
mbed_official 237:f3da66175598 130 }
mbed_official 237:f3da66175598 131
mbed_official 237:f3da66175598 132 static inline int dac_read(dac_t *obj)
mbed_official 237:f3da66175598 133 {
mbed_official 237:f3da66175598 134 if ((obj->pin == PA_4) || (obj->pin == PA_6)) {
mbed_official 237:f3da66175598 135 return (int)HAL_DAC_GetValue(&DacHandle, DAC_CHANNEL_1);
mbed_official 237:f3da66175598 136 } else if (obj->pin == PA_5) {
mbed_official 237:f3da66175598 137 return (int)HAL_DAC_GetValue(&DacHandle, DAC_CHANNEL_2);
mbed_official 237:f3da66175598 138 } else {
mbed_official 237:f3da66175598 139 return 0;
mbed_official 237:f3da66175598 140 }
mbed_official 237:f3da66175598 141 }
mbed_official 237:f3da66175598 142
mbed_official 237:f3da66175598 143 void analogout_write(dac_t *obj, float value)
mbed_official 237:f3da66175598 144 {
mbed_official 237:f3da66175598 145 if (value < 0.0f) {
mbed_official 237:f3da66175598 146 dac_write(obj, 0); // Min value
mbed_official 237:f3da66175598 147 } else if (value > 1.0f) {
mbed_official 237:f3da66175598 148 dac_write(obj, (uint16_t)DAC_RANGE); // Max value
mbed_official 237:f3da66175598 149 } else {
mbed_official 237:f3da66175598 150 dac_write(obj, (uint16_t)(value * (float)DAC_RANGE));
mbed_official 237:f3da66175598 151 }
mbed_official 237:f3da66175598 152 }
mbed_official 237:f3da66175598 153
mbed_official 237:f3da66175598 154 void analogout_write_u16(dac_t *obj, uint16_t value)
mbed_official 237:f3da66175598 155 {
mbed_official 237:f3da66175598 156 if (value > (uint16_t)DAC_RANGE) {
mbed_official 237:f3da66175598 157 dac_write(obj, (uint16_t)DAC_RANGE); // Max value
mbed_official 237:f3da66175598 158 } else {
mbed_official 237:f3da66175598 159 dac_write(obj, value);
mbed_official 237:f3da66175598 160 }
mbed_official 237:f3da66175598 161 }
mbed_official 237:f3da66175598 162
mbed_official 237:f3da66175598 163 float analogout_read(dac_t *obj)
mbed_official 237:f3da66175598 164 {
mbed_official 237:f3da66175598 165 uint32_t value = dac_read(obj);
mbed_official 237:f3da66175598 166 return (float)((float)value * (1.0f / (float)DAC_RANGE));
mbed_official 237:f3da66175598 167 }
mbed_official 237:f3da66175598 168
mbed_official 237:f3da66175598 169 uint16_t analogout_read_u16(dac_t *obj)
mbed_official 237:f3da66175598 170 {
mbed_official 237:f3da66175598 171 return (uint16_t)dac_read(obj);
mbed_official 237:f3da66175598 172 }
mbed_official 237:f3da66175598 173
mbed_official 237:f3da66175598 174 #endif // DEVICE_ANALOGOUT