gabriel della-monica / mbed-src

mbed library sources

Fork of mbed-src by mbed official

targets/hal/TARGET_STM/TARGET_DISCO_L053C8/analogout_api.c@439:c4382fcbbaed, 2014-12-15 (annotated)

Committer:
mbed_official
Date:
Mon Dec 15 09:30:07 2014 +0000
Revision:
439:c4382fcbbaed
Parent:
376:cb4d9db17537 
Synchronized with git revision 6172cbea1a558a9a2ebbd965e77f83a9ceeec670



Full URL: https://github.com/mbedmicro/mbed/commit/6172cbea1a558a9a2ebbd965e77f83a9ceeec670/



Targets: DISCO_L053C8 - update from nucleo latest changes

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 376:cb4d9db17537 1 /* mbed Microcontroller Library
mbed_official 376:cb4d9db17537 2 * Copyright (c) 2014, STMicroelectronics
mbed_official 376:cb4d9db17537 3 * All rights reserved.
mbed_official 376:cb4d9db17537 4 *
mbed_official 376:cb4d9db17537 5 * Redistribution and use in source and binary forms, with or without
mbed_official 376:cb4d9db17537 6 * modification, are permitted provided that the following conditions are met:
mbed_official 376:cb4d9db17537 7 *
mbed_official 376:cb4d9db17537 8 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 376:cb4d9db17537 9 * this list of conditions and the following disclaimer.
mbed_official 376:cb4d9db17537 10 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 376:cb4d9db17537 11 * this list of conditions and the following disclaimer in the documentation
mbed_official 376:cb4d9db17537 12 * and/or other materials provided with the distribution.
mbed_official 376:cb4d9db17537 13 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 376:cb4d9db17537 14 * may be used to endorse or promote products derived from this software
mbed_official 376:cb4d9db17537 15 * without specific prior written permission.
mbed_official 376:cb4d9db17537 16 *
mbed_official 376:cb4d9db17537 17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 376:cb4d9db17537 18 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 376:cb4d9db17537 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 376:cb4d9db17537 20 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 376:cb4d9db17537 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 376:cb4d9db17537 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 376:cb4d9db17537 23 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 376:cb4d9db17537 24 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 376:cb4d9db17537 25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 376:cb4d9db17537 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 376:cb4d9db17537 27 */
mbed_official 376:cb4d9db17537 28 #include "mbed_assert.h"
mbed_official 376:cb4d9db17537 29 #include "analogout_api.h"
mbed_official 376:cb4d9db17537 30
mbed_official 376:cb4d9db17537 31 #if DEVICE_ANALOGOUT
mbed_official 376:cb4d9db17537 32
mbed_official 376:cb4d9db17537 33 #include "cmsis.h"
mbed_official 376:cb4d9db17537 34 #include "pinmap.h"
mbed_official 376:cb4d9db17537 35 #include "mbed_error.h"
mbed_official 439:c4382fcbbaed 36 #include "PeripheralPins.h"
mbed_official 376:cb4d9db17537 37
mbed_official 376:cb4d9db17537 38 #define DAC_RANGE (0xFFF) // 12 bits
mbed_official 376:cb4d9db17537 39
mbed_official 376:cb4d9db17537 40 static DAC_HandleTypeDef DacHandle;
mbed_official 376:cb4d9db17537 41
mbed_official 439:c4382fcbbaed 42 void analogout_init(dac_t *obj, PinName pin)
mbed_official 439:c4382fcbbaed 43 {
mbed_official 376:cb4d9db17537 44 DAC_ChannelConfTypeDef sConfig;
mbed_official 376:cb4d9db17537 45
mbed_official 376:cb4d9db17537 46 DacHandle.Instance = DAC;
mbed_official 376:cb4d9db17537 47
mbed_official 376:cb4d9db17537 48 // Get the peripheral name (DAC_1, ...) from the pin and assign it to the object
mbed_official 376:cb4d9db17537 49 obj->dac = (DACName)pinmap_peripheral(pin, PinMap_DAC);
mbed_official 376:cb4d9db17537 50 MBED_ASSERT(obj->dac != (DACName)NC);
mbed_official 376:cb4d9db17537 51
mbed_official 376:cb4d9db17537 52 // Configure GPIO
mbed_official 376:cb4d9db17537 53 pinmap_pinout(pin, PinMap_DAC);
mbed_official 376:cb4d9db17537 54
mbed_official 376:cb4d9db17537 55 // Save the channel for future use
mbed_official 376:cb4d9db17537 56 obj->pin = pin;
mbed_official 376:cb4d9db17537 57
mbed_official 376:cb4d9db17537 58 // Enable DAC clock
mbed_official 376:cb4d9db17537 59 __DAC_CLK_ENABLE();
mbed_official 376:cb4d9db17537 60
mbed_official 376:cb4d9db17537 61 // Configure DAC
mbed_official 376:cb4d9db17537 62 sConfig.DAC_Trigger = DAC_TRIGGER_NONE;
mbed_official 376:cb4d9db17537 63 sConfig.DAC_OutputBuffer = DAC_OUTPUTBUFFER_DISABLE;
mbed_official 376:cb4d9db17537 64
mbed_official 376:cb4d9db17537 65 HAL_DAC_ConfigChannel(&DacHandle, &sConfig, DAC_CHANNEL_1);
mbed_official 376:cb4d9db17537 66
mbed_official 376:cb4d9db17537 67 analogout_write_u16(obj, 0);
mbed_official 376:cb4d9db17537 68 }
mbed_official 376:cb4d9db17537 69
mbed_official 439:c4382fcbbaed 70 void analogout_free(dac_t *obj)
mbed_official 439:c4382fcbbaed 71 {
mbed_official 376:cb4d9db17537 72 // Reset DAC and disable clock
mbed_official 376:cb4d9db17537 73 __DAC_FORCE_RESET();
mbed_official 376:cb4d9db17537 74 __DAC_RELEASE_RESET();
mbed_official 376:cb4d9db17537 75 __DAC_CLK_DISABLE();
mbed_official 376:cb4d9db17537 76
mbed_official 376:cb4d9db17537 77 // Configure GPIO
mbed_official 376:cb4d9db17537 78 pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
mbed_official 376:cb4d9db17537 79 }
mbed_official 376:cb4d9db17537 80
mbed_official 439:c4382fcbbaed 81 static inline void dac_write(dac_t *obj, uint16_t value)
mbed_official 439:c4382fcbbaed 82 {
mbed_official 376:cb4d9db17537 83 HAL_DAC_SetValue(&DacHandle, DAC_CHANNEL_1, DAC_ALIGN_12B_R, value);
mbed_official 376:cb4d9db17537 84 HAL_DAC_Start(&DacHandle, DAC_CHANNEL_1);
mbed_official 376:cb4d9db17537 85 }
mbed_official 376:cb4d9db17537 86
mbed_official 439:c4382fcbbaed 87 static inline int dac_read(dac_t *obj)
mbed_official 439:c4382fcbbaed 88 {
mbed_official 376:cb4d9db17537 89 return (int)HAL_DAC_GetValue(&DacHandle, DAC_CHANNEL_1);
mbed_official 376:cb4d9db17537 90 }
mbed_official 376:cb4d9db17537 91
mbed_official 439:c4382fcbbaed 92 void analogout_write(dac_t *obj, float value)
mbed_official 439:c4382fcbbaed 93 {
mbed_official 376:cb4d9db17537 94 if (value < 0.0f) {
mbed_official 376:cb4d9db17537 95 dac_write(obj, 0); // Min value
mbed_official 376:cb4d9db17537 96 } else if (value > 1.0f) {
mbed_official 376:cb4d9db17537 97 dac_write(obj, (uint16_t)DAC_RANGE); // Max value
mbed_official 376:cb4d9db17537 98 } else {
mbed_official 376:cb4d9db17537 99 dac_write(obj, (uint16_t)(value * (float)DAC_RANGE));
mbed_official 376:cb4d9db17537 100 }
mbed_official 376:cb4d9db17537 101 }
mbed_official 376:cb4d9db17537 102
mbed_official 439:c4382fcbbaed 103 void analogout_write_u16(dac_t *obj, uint16_t value)
mbed_official 439:c4382fcbbaed 104 {
mbed_official 376:cb4d9db17537 105 if (value > (uint16_t)DAC_RANGE) {
mbed_official 376:cb4d9db17537 106 dac_write(obj, (uint16_t)DAC_RANGE); // Max value
mbed_official 376:cb4d9db17537 107 } else {
mbed_official 376:cb4d9db17537 108 dac_write(obj, value);
mbed_official 376:cb4d9db17537 109 }
mbed_official 376:cb4d9db17537 110 }
mbed_official 376:cb4d9db17537 111
mbed_official 439:c4382fcbbaed 112 float analogout_read(dac_t *obj)
mbed_official 439:c4382fcbbaed 113 {
mbed_official 376:cb4d9db17537 114 uint32_t value = dac_read(obj);
mbed_official 376:cb4d9db17537 115 return (float)((float)value * (1.0f / (float)DAC_RANGE));
mbed_official 376:cb4d9db17537 116 }
mbed_official 376:cb4d9db17537 117
mbed_official 439:c4382fcbbaed 118 uint16_t analogout_read_u16(dac_t *obj)
mbed_official 439:c4382fcbbaed 119 {
mbed_official 376:cb4d9db17537 120 return (uint16_t)dac_read(obj);
mbed_official 376:cb4d9db17537 121 }
mbed_official 376:cb4d9db17537 122
mbed_official 376:cb4d9db17537 123 #endif // DEVICE_ANALOGOUT