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_F072RB/analogout_api.c@219:993c9b0acbcc, 2014-06-02 (annotated)

Committer:
mbed_official
Date:
Mon Jun 02 09:45:07 2014 +0100
Revision:
219:993c9b0acbcc
Child:
239:8cadf13dff33
Synchronized with git revision cd741909614c52b886d34bad5007da2057c1a185



Full URL: https://github.com/mbedmicro/mbed/commit/cd741909614c52b886d34bad5007da2057c1a185/



[NUCLEO_F072RB] Add HAL files

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 219:993c9b0acbcc 28 #include "analogout_api.h"
mbed_official 219:993c9b0acbcc 29
mbed_official 219:993c9b0acbcc 30 #if DEVICE_ANALOGOUT
mbed_official 219:993c9b0acbcc 31
mbed_official 219:993c9b0acbcc 32 #include "cmsis.h"
mbed_official 219:993c9b0acbcc 33 #include "pinmap.h"
mbed_official 219:993c9b0acbcc 34 #include "error.h"
mbed_official 219:993c9b0acbcc 35
mbed_official 219:993c9b0acbcc 36 #define DAC_RANGE (0xFFF) // 12 bits
mbed_official 219:993c9b0acbcc 37
mbed_official 219:993c9b0acbcc 38 static const PinMap PinMap_DAC[] = {
mbed_official 219:993c9b0acbcc 39 {PA_4, DAC_1, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0)}, // DAC_OUT1
mbed_official 219:993c9b0acbcc 40 {PA_5, DAC_1, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0)}, // DAC_OUT2 (Warning: LED1 is also on this pin)
mbed_official 219:993c9b0acbcc 41 {NC, NC, 0}
mbed_official 219:993c9b0acbcc 42 };
mbed_official 219:993c9b0acbcc 43
mbed_official 219:993c9b0acbcc 44 static DAC_HandleTypeDef DacHandle;
mbed_official 219:993c9b0acbcc 45
mbed_official 219:993c9b0acbcc 46 void analogout_init(dac_t *obj, PinName pin) {
mbed_official 219:993c9b0acbcc 47 DAC_ChannelConfTypeDef sConfig;
mbed_official 219:993c9b0acbcc 48
mbed_official 219:993c9b0acbcc 49 DacHandle.Instance = DAC;
mbed_official 219:993c9b0acbcc 50
mbed_official 219:993c9b0acbcc 51 // Get the peripheral name (DAC_1, ...) from the pin and assign it to the object
mbed_official 219:993c9b0acbcc 52 obj->dac = (DACName)pinmap_peripheral(pin, PinMap_DAC);
mbed_official 219:993c9b0acbcc 53
mbed_official 219:993c9b0acbcc 54 if (obj->dac == (DACName)NC) {
mbed_official 219:993c9b0acbcc 55 error("DAC pin mapping failed");
mbed_official 219:993c9b0acbcc 56 }
mbed_official 219:993c9b0acbcc 57
mbed_official 219:993c9b0acbcc 58 // Configure GPIO
mbed_official 219:993c9b0acbcc 59 pinmap_pinout(pin, PinMap_DAC);
mbed_official 219:993c9b0acbcc 60
mbed_official 219:993c9b0acbcc 61 // Save the channel for future use
mbed_official 219:993c9b0acbcc 62 obj->pin = pin;
mbed_official 219:993c9b0acbcc 63
mbed_official 219:993c9b0acbcc 64 // Enable DAC clock
mbed_official 219:993c9b0acbcc 65 __DAC1_CLK_ENABLE();
mbed_official 219:993c9b0acbcc 66
mbed_official 219:993c9b0acbcc 67 // Configure DAC
mbed_official 219:993c9b0acbcc 68 sConfig.DAC_Trigger = DAC_TRIGGER_NONE;
mbed_official 219:993c9b0acbcc 69 sConfig.DAC_OutputBuffer = DAC_OUTPUTBUFFER_DISABLE;
mbed_official 219:993c9b0acbcc 70
mbed_official 219:993c9b0acbcc 71 if (pin == PA_4) {
mbed_official 219:993c9b0acbcc 72 HAL_DAC_ConfigChannel(&DacHandle, &sConfig, DAC_CHANNEL_1);
mbed_official 219:993c9b0acbcc 73 } else { // PA_5
mbed_official 219:993c9b0acbcc 74 HAL_DAC_ConfigChannel(&DacHandle, &sConfig, DAC_CHANNEL_2);
mbed_official 219:993c9b0acbcc 75 }
mbed_official 219:993c9b0acbcc 76
mbed_official 219:993c9b0acbcc 77 analogout_write_u16(obj, 0);
mbed_official 219:993c9b0acbcc 78 }
mbed_official 219:993c9b0acbcc 79
mbed_official 219:993c9b0acbcc 80 void analogout_free(dac_t *obj) {
mbed_official 219:993c9b0acbcc 81 // Reset DAC and disable clock
mbed_official 219:993c9b0acbcc 82 __DAC1_FORCE_RESET();
mbed_official 219:993c9b0acbcc 83 __DAC1_RELEASE_RESET();
mbed_official 219:993c9b0acbcc 84 __DAC1_CLK_DISABLE();
mbed_official 219:993c9b0acbcc 85
mbed_official 219:993c9b0acbcc 86 // Configure GPIO
mbed_official 219:993c9b0acbcc 87 pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
mbed_official 219:993c9b0acbcc 88 }
mbed_official 219:993c9b0acbcc 89
mbed_official 219:993c9b0acbcc 90 static inline void dac_write(dac_t *obj, uint16_t value) {
mbed_official 219:993c9b0acbcc 91 if (obj->pin == PA_4) {
mbed_official 219:993c9b0acbcc 92 HAL_DAC_SetValue(&DacHandle, DAC_CHANNEL_1, DAC_ALIGN_12B_R, value);
mbed_official 219:993c9b0acbcc 93 HAL_DAC_Start(&DacHandle, DAC_CHANNEL_1);
mbed_official 219:993c9b0acbcc 94 } else { // PA_5
mbed_official 219:993c9b0acbcc 95 HAL_DAC_SetValue(&DacHandle, DAC_CHANNEL_2, DAC_ALIGN_12B_R, value);
mbed_official 219:993c9b0acbcc 96 HAL_DAC_Start(&DacHandle, DAC_CHANNEL_2);
mbed_official 219:993c9b0acbcc 97 }
mbed_official 219:993c9b0acbcc 98 }
mbed_official 219:993c9b0acbcc 99
mbed_official 219:993c9b0acbcc 100 static inline int dac_read(dac_t *obj) {
mbed_official 219:993c9b0acbcc 101 if (obj->pin == PA_4) {
mbed_official 219:993c9b0acbcc 102 return (int)HAL_DAC_GetValue(&DacHandle, DAC_CHANNEL_1);
mbed_official 219:993c9b0acbcc 103 } else { // PA_5
mbed_official 219:993c9b0acbcc 104 return (int)HAL_DAC_GetValue(&DacHandle, DAC_CHANNEL_2);
mbed_official 219:993c9b0acbcc 105 }
mbed_official 219:993c9b0acbcc 106 }
mbed_official 219:993c9b0acbcc 107
mbed_official 219:993c9b0acbcc 108 void analogout_write(dac_t *obj, float value) {
mbed_official 219:993c9b0acbcc 109 if (value < 0.0f) {
mbed_official 219:993c9b0acbcc 110 dac_write(obj, 0); // Min value
mbed_official 219:993c9b0acbcc 111 } else if (value > 1.0f) {
mbed_official 219:993c9b0acbcc 112 dac_write(obj, (uint16_t)DAC_RANGE); // Max value
mbed_official 219:993c9b0acbcc 113 } else {
mbed_official 219:993c9b0acbcc 114 dac_write(obj, (uint16_t)(value * (float)DAC_RANGE));
mbed_official 219:993c9b0acbcc 115 }
mbed_official 219:993c9b0acbcc 116 }
mbed_official 219:993c9b0acbcc 117
mbed_official 219:993c9b0acbcc 118 void analogout_write_u16(dac_t *obj, uint16_t value) {
mbed_official 219:993c9b0acbcc 119 if (value > (uint16_t)DAC_RANGE) {
mbed_official 219:993c9b0acbcc 120 dac_write(obj, (uint16_t)DAC_RANGE); // Max value
mbed_official 219:993c9b0acbcc 121 } else {
mbed_official 219:993c9b0acbcc 122 dac_write(obj, value);
mbed_official 219:993c9b0acbcc 123 }
mbed_official 219:993c9b0acbcc 124 }
mbed_official 219:993c9b0acbcc 125
mbed_official 219:993c9b0acbcc 126 float analogout_read(dac_t *obj) {
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 219:993c9b0acbcc 131 uint16_t analogout_read_u16(dac_t *obj) {
mbed_official 219:993c9b0acbcc 132 return (uint16_t)dac_read(obj);
mbed_official 219:993c9b0acbcc 133 }
mbed_official 219:993c9b0acbcc 134
mbed_official 219:993c9b0acbcc 135 #endif // DEVICE_ANALOGOUT