long dao / mbed-src

Mbed for VNG board

Fork of mbed-src by mbed official

targets/hal/TARGET_STM/TARGET_NUCLEO_F072RB/analogout_api.c@414:4ec4c5b614b0, 2014-11-25 (annotated)

Committer:
mbed_official
Date:
Tue Nov 25 07:15:09 2014 +0000
Revision:
414:4ec4c5b614b0
Parent:
402:09075a3b15e3 
Synchronized with git revision fbc74e874ac089c6cb05add312fb5422be628886



Full URL: https://github.com/mbedmicro/mbed/commit/fbc74e874ac089c6cb05add312fb5422be628886/



Targets: NUCLEOs - Add PeripheralPins files for all nucleo targets

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 219:993c9b0acbcc 1 /* mbed Microcontroller Library
mbed_official 219:993c9b0acbcc 2 * Copyright (c) 2014, STMicroelectronics
mbed_official 219:993c9b0acbcc 3 * All rights reserved.
mbed_official 219:993c9b0acbcc 4 *
mbed_official 219:993c9b0acbcc 5 * Redistribution and use in source and binary forms, with or without
mbed_official 219:993c9b0acbcc 6 * modification, are permitted provided that the following conditions are met:
mbed_official 219:993c9b0acbcc 7 *
mbed_official 219:993c9b0acbcc 8 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 219:993c9b0acbcc 9 * this list of conditions and the following disclaimer.
mbed_official 219:993c9b0acbcc 10 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 219:993c9b0acbcc 11 * this list of conditions and the following disclaimer in the documentation
mbed_official 219:993c9b0acbcc 12 * and/or other materials provided with the distribution.
mbed_official 219:993c9b0acbcc 13 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 219:993c9b0acbcc 14 * may be used to endorse or promote products derived from this software
mbed_official 219:993c9b0acbcc 15 * without specific prior written permission.
mbed_official 219:993c9b0acbcc 16 *
mbed_official 219:993c9b0acbcc 17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 219:993c9b0acbcc 18 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 219:993c9b0acbcc 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 219:993c9b0acbcc 20 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 219:993c9b0acbcc 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 219:993c9b0acbcc 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 219:993c9b0acbcc 23 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 219:993c9b0acbcc 24 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 219:993c9b0acbcc 25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 219:993c9b0acbcc 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 219:993c9b0acbcc 27 */
mbed_official 239:8cadf13dff33 28 #include "mbed_assert.h"
mbed_official 219:993c9b0acbcc 29 #include "analogout_api.h"
mbed_official 219:993c9b0acbcc 30
mbed_official 219:993c9b0acbcc 31 #if DEVICE_ANALOGOUT
mbed_official 219:993c9b0acbcc 32
mbed_official 219:993c9b0acbcc 33 #include "cmsis.h"
mbed_official 219:993c9b0acbcc 34 #include "pinmap.h"
mbed_official 285:31249416b6f9 35 #include "mbed_error.h"
mbed_official 414:4ec4c5b614b0 36 #include "PeripheralPins.h"
mbed_official 219:993c9b0acbcc 37
mbed_official 219:993c9b0acbcc 38 #define DAC_RANGE (0xFFF) // 12 bits
mbed_official 219:993c9b0acbcc 39
mbed_official 219:993c9b0acbcc 40 static DAC_HandleTypeDef DacHandle;
mbed_official 219:993c9b0acbcc 41
mbed_official 402:09075a3b15e3 42 void analogout_init(dac_t *obj, PinName pin)
mbed_official 402:09075a3b15e3 43 {
mbed_official 219:993c9b0acbcc 44 DAC_ChannelConfTypeDef sConfig;
mbed_official 219:993c9b0acbcc 45
mbed_official 219:993c9b0acbcc 46 DacHandle.Instance = DAC;
mbed_official 219:993c9b0acbcc 47
mbed_official 219:993c9b0acbcc 48 // Get the peripheral name (DAC_1, ...) from the pin and assign it to the object
mbed_official 219:993c9b0acbcc 49 obj->dac = (DACName)pinmap_peripheral(pin, PinMap_DAC);
mbed_official 239:8cadf13dff33 50 MBED_ASSERT(obj->dac != (DACName)NC);
mbed_official 219:993c9b0acbcc 51
mbed_official 219:993c9b0acbcc 52 // Configure GPIO
mbed_official 219:993c9b0acbcc 53 pinmap_pinout(pin, PinMap_DAC);
mbed_official 219:993c9b0acbcc 54
mbed_official 219:993c9b0acbcc 55 // Save the channel for future use
mbed_official 219:993c9b0acbcc 56 obj->pin = pin;
mbed_official 219:993c9b0acbcc 57
mbed_official 219:993c9b0acbcc 58 // Enable DAC clock
mbed_official 219:993c9b0acbcc 59 __DAC1_CLK_ENABLE();
mbed_official 219:993c9b0acbcc 60
mbed_official 219:993c9b0acbcc 61 // Configure DAC
mbed_official 219:993c9b0acbcc 62 sConfig.DAC_Trigger = DAC_TRIGGER_NONE;
mbed_official 219:993c9b0acbcc 63 sConfig.DAC_OutputBuffer = DAC_OUTPUTBUFFER_DISABLE;
mbed_official 219:993c9b0acbcc 64
mbed_official 219:993c9b0acbcc 65 if (pin == PA_4) {
mbed_official 219:993c9b0acbcc 66 HAL_DAC_ConfigChannel(&DacHandle, &sConfig, DAC_CHANNEL_1);
mbed_official 219:993c9b0acbcc 67 } else { // PA_5
mbed_official 219:993c9b0acbcc 68 HAL_DAC_ConfigChannel(&DacHandle, &sConfig, DAC_CHANNEL_2);
mbed_official 219:993c9b0acbcc 69 }
mbed_official 219:993c9b0acbcc 70
mbed_official 219:993c9b0acbcc 71 analogout_write_u16(obj, 0);
mbed_official 219:993c9b0acbcc 72 }
mbed_official 219:993c9b0acbcc 73
mbed_official 402:09075a3b15e3 74 void analogout_free(dac_t *obj)
mbed_official 402:09075a3b15e3 75 {
mbed_official 219:993c9b0acbcc 76 // Reset DAC and disable clock
mbed_official 219:993c9b0acbcc 77 __DAC1_FORCE_RESET();
mbed_official 219:993c9b0acbcc 78 __DAC1_RELEASE_RESET();
mbed_official 219:993c9b0acbcc 79 __DAC1_CLK_DISABLE();
mbed_official 219:993c9b0acbcc 80
mbed_official 219:993c9b0acbcc 81 // Configure GPIO
mbed_official 219:993c9b0acbcc 82 pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
mbed_official 219:993c9b0acbcc 83 }
mbed_official 219:993c9b0acbcc 84
mbed_official 402:09075a3b15e3 85 static inline void dac_write(dac_t *obj, uint16_t value)
mbed_official 402:09075a3b15e3 86 {
mbed_official 219:993c9b0acbcc 87 if (obj->pin == PA_4) {
mbed_official 219:993c9b0acbcc 88 HAL_DAC_SetValue(&DacHandle, DAC_CHANNEL_1, DAC_ALIGN_12B_R, value);
mbed_official 219:993c9b0acbcc 89 HAL_DAC_Start(&DacHandle, DAC_CHANNEL_1);
mbed_official 219:993c9b0acbcc 90 } else { // PA_5
mbed_official 219:993c9b0acbcc 91 HAL_DAC_SetValue(&DacHandle, DAC_CHANNEL_2, DAC_ALIGN_12B_R, value);
mbed_official 219:993c9b0acbcc 92 HAL_DAC_Start(&DacHandle, DAC_CHANNEL_2);
mbed_official 219:993c9b0acbcc 93 }
mbed_official 219:993c9b0acbcc 94 }
mbed_official 219:993c9b0acbcc 95
mbed_official 402:09075a3b15e3 96 static inline int dac_read(dac_t *obj)
mbed_official 402:09075a3b15e3 97 {
mbed_official 219:993c9b0acbcc 98 if (obj->pin == PA_4) {
mbed_official 219:993c9b0acbcc 99 return (int)HAL_DAC_GetValue(&DacHandle, DAC_CHANNEL_1);
mbed_official 219:993c9b0acbcc 100 } else { // PA_5
mbed_official 219:993c9b0acbcc 101 return (int)HAL_DAC_GetValue(&DacHandle, DAC_CHANNEL_2);
mbed_official 219:993c9b0acbcc 102 }
mbed_official 219:993c9b0acbcc 103 }
mbed_official 219:993c9b0acbcc 104
mbed_official 402:09075a3b15e3 105 void analogout_write(dac_t *obj, float value)
mbed_official 402:09075a3b15e3 106 {
mbed_official 219:993c9b0acbcc 107 if (value < 0.0f) {
mbed_official 219:993c9b0acbcc 108 dac_write(obj, 0); // Min value
mbed_official 219:993c9b0acbcc 109 } else if (value > 1.0f) {
mbed_official 219:993c9b0acbcc 110 dac_write(obj, (uint16_t)DAC_RANGE); // Max value
mbed_official 219:993c9b0acbcc 111 } else {
mbed_official 219:993c9b0acbcc 112 dac_write(obj, (uint16_t)(value * (float)DAC_RANGE));
mbed_official 219:993c9b0acbcc 113 }
mbed_official 219:993c9b0acbcc 114 }
mbed_official 219:993c9b0acbcc 115
mbed_official 402:09075a3b15e3 116 void analogout_write_u16(dac_t *obj, uint16_t value)
mbed_official 402:09075a3b15e3 117 {
mbed_official 219:993c9b0acbcc 118 if (value > (uint16_t)DAC_RANGE) {
mbed_official 219:993c9b0acbcc 119 dac_write(obj, (uint16_t)DAC_RANGE); // Max value
mbed_official 219:993c9b0acbcc 120 } else {
mbed_official 219:993c9b0acbcc 121 dac_write(obj, value);
mbed_official 219:993c9b0acbcc 122 }
mbed_official 219:993c9b0acbcc 123 }
mbed_official 219:993c9b0acbcc 124
mbed_official 402:09075a3b15e3 125 float analogout_read(dac_t *obj)
mbed_official 402:09075a3b15e3 126 {
mbed_official 219:993c9b0acbcc 127 uint32_t value = dac_read(obj);
mbed_official 219:993c9b0acbcc 128 return (float)((float)value * (1.0f / (float)DAC_RANGE));
mbed_official 219:993c9b0acbcc 129 }
mbed_official 219:993c9b0acbcc 130
mbed_official 402:09075a3b15e3 131 uint16_t analogout_read_u16(dac_t *obj)
mbed_official 402:09075a3b15e3 132 {
mbed_official 219:993c9b0acbcc 133 return (uint16_t)dac_read(obj);
mbed_official 219:993c9b0acbcc 134 }
mbed_official 219:993c9b0acbcc 135
mbed_official 219:993c9b0acbcc 136 #endif // DEVICE_ANALOGOUT