Adam Kucybala / mbed-src

mbed library sources

Fork of mbed-src by mbed official

targets/hal/TARGET_STM/TARGET_NUCLEO_L053R8/analogout_api.c@217:d0ccc61c1fd4, 2014-05-27 (annotated)

Committer:
mbed_official
Date:
Tue May 27 13:00:07 2014 +0100
Revision:
217:d0ccc61c1fd4
Parent:
201:fa203361dc70 
Synchronized with git revision bd83615ac55fe00f83e44dafc7ba017a3850f4e5



Full URL: https://github.com/mbedmicro/mbed/commit/bd83615ac55fe00f83e44dafc7ba017a3850f4e5/



[NRF51822] analog read - set channel

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 181:a4cbdfbbd2f4 1 /* mbed Microcontroller Library
mbed_official 181:a4cbdfbbd2f4 2 * Copyright (c) 2014, STMicroelectronics
mbed_official 181:a4cbdfbbd2f4 3 * All rights reserved.
mbed_official 181:a4cbdfbbd2f4 4 *
mbed_official 181:a4cbdfbbd2f4 5 * Redistribution and use in source and binary forms, with or without
mbed_official 181:a4cbdfbbd2f4 6 * modification, are permitted provided that the following conditions are met:
mbed_official 181:a4cbdfbbd2f4 7 *
mbed_official 181:a4cbdfbbd2f4 8 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 181:a4cbdfbbd2f4 9 * this list of conditions and the following disclaimer.
mbed_official 181:a4cbdfbbd2f4 10 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 181:a4cbdfbbd2f4 11 * this list of conditions and the following disclaimer in the documentation
mbed_official 181:a4cbdfbbd2f4 12 * and/or other materials provided with the distribution.
mbed_official 181:a4cbdfbbd2f4 13 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 181:a4cbdfbbd2f4 14 * may be used to endorse or promote products derived from this software
mbed_official 181:a4cbdfbbd2f4 15 * without specific prior written permission.
mbed_official 181:a4cbdfbbd2f4 16 *
mbed_official 181:a4cbdfbbd2f4 17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 181:a4cbdfbbd2f4 18 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 181:a4cbdfbbd2f4 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 181:a4cbdfbbd2f4 20 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 181:a4cbdfbbd2f4 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 181:a4cbdfbbd2f4 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 181:a4cbdfbbd2f4 23 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 181:a4cbdfbbd2f4 24 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 181:a4cbdfbbd2f4 25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 181:a4cbdfbbd2f4 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 181:a4cbdfbbd2f4 27 */
mbed_official 181:a4cbdfbbd2f4 28 #include "analogout_api.h"
mbed_official 181:a4cbdfbbd2f4 29
mbed_official 181:a4cbdfbbd2f4 30 #if DEVICE_ANALOGOUT
mbed_official 181:a4cbdfbbd2f4 31
mbed_official 181:a4cbdfbbd2f4 32 #include "cmsis.h"
mbed_official 181:a4cbdfbbd2f4 33 #include "pinmap.h"
mbed_official 181:a4cbdfbbd2f4 34 #include "error.h"
mbed_official 181:a4cbdfbbd2f4 35
mbed_official 181:a4cbdfbbd2f4 36 #define DAC_RANGE (0xFFF) // 12 bits
mbed_official 181:a4cbdfbbd2f4 37
mbed_official 181:a4cbdfbbd2f4 38 static const PinMap PinMap_DAC[] = {
mbed_official 181:a4cbdfbbd2f4 39 {PA_4, DAC_1, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0)}, // DAC_OUT
mbed_official 181:a4cbdfbbd2f4 40 {NC, NC, 0}
mbed_official 181:a4cbdfbbd2f4 41 };
mbed_official 181:a4cbdfbbd2f4 42
mbed_official 181:a4cbdfbbd2f4 43 static DAC_HandleTypeDef DacHandle;
mbed_official 181:a4cbdfbbd2f4 44
mbed_official 181:a4cbdfbbd2f4 45 void analogout_init(dac_t *obj, PinName pin) {
mbed_official 181:a4cbdfbbd2f4 46 DAC_ChannelConfTypeDef sConfig;
mbed_official 181:a4cbdfbbd2f4 47
mbed_official 181:a4cbdfbbd2f4 48 DacHandle.Instance = DAC;
mbed_official 181:a4cbdfbbd2f4 49
mbed_official 181:a4cbdfbbd2f4 50 // Get the peripheral name (DAC_1, ...) from the pin and assign it to the object
mbed_official 181:a4cbdfbbd2f4 51 obj->dac = (DACName)pinmap_peripheral(pin, PinMap_DAC);
mbed_official 181:a4cbdfbbd2f4 52
mbed_official 181:a4cbdfbbd2f4 53 if (obj->dac == (DACName)NC) {
mbed_official 181:a4cbdfbbd2f4 54 error("DAC pin mapping failed");
mbed_official 181:a4cbdfbbd2f4 55 }
mbed_official 181:a4cbdfbbd2f4 56
mbed_official 181:a4cbdfbbd2f4 57 // Configure GPIO
mbed_official 181:a4cbdfbbd2f4 58 pinmap_pinout(pin, PinMap_DAC);
mbed_official 181:a4cbdfbbd2f4 59
mbed_official 181:a4cbdfbbd2f4 60 // Save the channel for future use
mbed_official 217:d0ccc61c1fd4 61 obj->pin = pin;
mbed_official 181:a4cbdfbbd2f4 62
mbed_official 181:a4cbdfbbd2f4 63 // Enable DAC clock
mbed_official 181:a4cbdfbbd2f4 64 __DAC_CLK_ENABLE();
mbed_official 181:a4cbdfbbd2f4 65
mbed_official 181:a4cbdfbbd2f4 66 // Configure DAC
mbed_official 181:a4cbdfbbd2f4 67 sConfig.DAC_Trigger = DAC_TRIGGER_NONE;
mbed_official 181:a4cbdfbbd2f4 68 sConfig.DAC_OutputBuffer = DAC_OUTPUTBUFFER_DISABLE;
mbed_official 181:a4cbdfbbd2f4 69
mbed_official 181:a4cbdfbbd2f4 70 HAL_DAC_ConfigChannel(&DacHandle, &sConfig, DAC_CHANNEL_1);
mbed_official 181:a4cbdfbbd2f4 71
mbed_official 181:a4cbdfbbd2f4 72 analogout_write_u16(obj, 0);
mbed_official 181:a4cbdfbbd2f4 73 }
mbed_official 181:a4cbdfbbd2f4 74
mbed_official 181:a4cbdfbbd2f4 75 void analogout_free(dac_t *obj) {
mbed_official 201:fa203361dc70 76 // Reset DAC and disable clock
mbed_official 181:a4cbdfbbd2f4 77 __DAC_FORCE_RESET();
mbed_official 181:a4cbdfbbd2f4 78 __DAC_RELEASE_RESET();
mbed_official 181:a4cbdfbbd2f4 79 __DAC_CLK_DISABLE();
mbed_official 201:fa203361dc70 80
mbed_official 181:a4cbdfbbd2f4 81 // Configure GPIO
mbed_official 217:d0ccc61c1fd4 82 pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
mbed_official 181:a4cbdfbbd2f4 83 }
mbed_official 181:a4cbdfbbd2f4 84
mbed_official 181:a4cbdfbbd2f4 85 static inline void dac_write(dac_t *obj, uint16_t value) {
mbed_official 181:a4cbdfbbd2f4 86 HAL_DAC_SetValue(&DacHandle, DAC_CHANNEL_1, DAC_ALIGN_12B_R, value);
mbed_official 181:a4cbdfbbd2f4 87 HAL_DAC_Start(&DacHandle, DAC_CHANNEL_1);
mbed_official 181:a4cbdfbbd2f4 88 }
mbed_official 181:a4cbdfbbd2f4 89
mbed_official 181:a4cbdfbbd2f4 90 static inline int dac_read(dac_t *obj) {
mbed_official 181:a4cbdfbbd2f4 91 return (int)HAL_DAC_GetValue(&DacHandle, DAC_CHANNEL_1);
mbed_official 181:a4cbdfbbd2f4 92 }
mbed_official 181:a4cbdfbbd2f4 93
mbed_official 181:a4cbdfbbd2f4 94 void analogout_write(dac_t *obj, float value) {
mbed_official 181:a4cbdfbbd2f4 95 if (value < 0.0f) {
mbed_official 181:a4cbdfbbd2f4 96 dac_write(obj, 0); // Min value
mbed_official 181:a4cbdfbbd2f4 97 } else if (value > 1.0f) {
mbed_official 181:a4cbdfbbd2f4 98 dac_write(obj, (uint16_t)DAC_RANGE); // Max value
mbed_official 181:a4cbdfbbd2f4 99 } else {
mbed_official 181:a4cbdfbbd2f4 100 dac_write(obj, (uint16_t)(value * (float)DAC_RANGE));
mbed_official 181:a4cbdfbbd2f4 101 }
mbed_official 181:a4cbdfbbd2f4 102 }
mbed_official 181:a4cbdfbbd2f4 103
mbed_official 181:a4cbdfbbd2f4 104 void analogout_write_u16(dac_t *obj, uint16_t value) {
mbed_official 181:a4cbdfbbd2f4 105 if (value > (uint16_t)DAC_RANGE) {
mbed_official 181:a4cbdfbbd2f4 106 dac_write(obj, (uint16_t)DAC_RANGE); // Max value
mbed_official 181:a4cbdfbbd2f4 107 } else {
mbed_official 181:a4cbdfbbd2f4 108 dac_write(obj, value);
mbed_official 181:a4cbdfbbd2f4 109 }
mbed_official 181:a4cbdfbbd2f4 110 }
mbed_official 181:a4cbdfbbd2f4 111
mbed_official 181:a4cbdfbbd2f4 112 float analogout_read(dac_t *obj) {
mbed_official 181:a4cbdfbbd2f4 113 uint32_t value = dac_read(obj);
mbed_official 181:a4cbdfbbd2f4 114 return (float)((float)value * (1.0f / (float)DAC_RANGE));
mbed_official 181:a4cbdfbbd2f4 115 }
mbed_official 181:a4cbdfbbd2f4 116
mbed_official 181:a4cbdfbbd2f4 117 uint16_t analogout_read_u16(dac_t *obj) {
mbed_official 181:a4cbdfbbd2f4 118 return (uint16_t)dac_read(obj);
mbed_official 181:a4cbdfbbd2f4 119 }
mbed_official 181:a4cbdfbbd2f4 120
mbed_official 181:a4cbdfbbd2f4 121 #endif // DEVICE_ANALOGOUT