Knight KE / Mbed OS Game_Master

游戏王对战板，目前code还是空的

mbed-os/targets/TARGET_STM/analogout_api.c@0:9b3d4731edbb, 2018-06-21 (annotated)

Committer:
WFKnight
Date:
Thu Jun 21 13:51:43 2018 +0000
Revision:
0:9b3d4731edbb
UART, RTOS, LED

Who changed what in which revision?

UserRevisionLine numberNew contents of line
WFKnight 0:9b3d4731edbb 1 /* mbed Microcontroller Library
WFKnight 0:9b3d4731edbb 2 * Copyright (c) 2017, STMicroelectronics
WFKnight 0:9b3d4731edbb 3 * All rights reserved.
WFKnight 0:9b3d4731edbb 4 *
WFKnight 0:9b3d4731edbb 5 * Redistribution and use in source and binary forms, with or without
WFKnight 0:9b3d4731edbb 6 * modification, are permitted provided that the following conditions are met:
WFKnight 0:9b3d4731edbb 7 *
WFKnight 0:9b3d4731edbb 8 * 1. Redistributions of source code must retain the above copyright notice,
WFKnight 0:9b3d4731edbb 9 * this list of conditions and the following disclaimer.
WFKnight 0:9b3d4731edbb 10 * 2. Redistributions in binary form must reproduce the above copyright notice,
WFKnight 0:9b3d4731edbb 11 * this list of conditions and the following disclaimer in the documentation
WFKnight 0:9b3d4731edbb 12 * and/or other materials provided with the distribution.
WFKnight 0:9b3d4731edbb 13 * 3. Neither the name of STMicroelectronics nor the names of its contributors
WFKnight 0:9b3d4731edbb 14 * may be used to endorse or promote products derived from this software
WFKnight 0:9b3d4731edbb 15 * without specific prior written permission.
WFKnight 0:9b3d4731edbb 16 *
WFKnight 0:9b3d4731edbb 17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
WFKnight 0:9b3d4731edbb 18 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
WFKnight 0:9b3d4731edbb 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
WFKnight 0:9b3d4731edbb 20 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
WFKnight 0:9b3d4731edbb 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
WFKnight 0:9b3d4731edbb 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
WFKnight 0:9b3d4731edbb 23 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
WFKnight 0:9b3d4731edbb 24 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
WFKnight 0:9b3d4731edbb 25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
WFKnight 0:9b3d4731edbb 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
WFKnight 0:9b3d4731edbb 27 */
WFKnight 0:9b3d4731edbb 28 #include "mbed_assert.h"
WFKnight 0:9b3d4731edbb 29 #include "analogout_api.h"
WFKnight 0:9b3d4731edbb 30
WFKnight 0:9b3d4731edbb 31 #if DEVICE_ANALOGOUT
WFKnight 0:9b3d4731edbb 32
WFKnight 0:9b3d4731edbb 33 #include "cmsis.h"
WFKnight 0:9b3d4731edbb 34 #include "pinmap.h"
WFKnight 0:9b3d4731edbb 35 #include "mbed_error.h"
WFKnight 0:9b3d4731edbb 36 #include "PeripheralPins.h"
WFKnight 0:9b3d4731edbb 37
WFKnight 0:9b3d4731edbb 38 #define DAC_RANGE (0xFFF) // 12 bits
WFKnight 0:9b3d4731edbb 39 #define DAC_NB_BITS (12)
WFKnight 0:9b3d4731edbb 40
WFKnight 0:9b3d4731edbb 41 static inline void dac_write(dac_t *obj, int value)
WFKnight 0:9b3d4731edbb 42 {
WFKnight 0:9b3d4731edbb 43 HAL_DAC_SetValue(&obj->handle, obj->channel, DAC_ALIGN_12B_R, (value & DAC_RANGE));
WFKnight 0:9b3d4731edbb 44 HAL_DAC_Start(&obj->handle, obj->channel);
WFKnight 0:9b3d4731edbb 45 }
WFKnight 0:9b3d4731edbb 46
WFKnight 0:9b3d4731edbb 47 static inline int dac_read(dac_t *obj)
WFKnight 0:9b3d4731edbb 48 {
WFKnight 0:9b3d4731edbb 49 return (int)HAL_DAC_GetValue(&obj->handle, obj->channel);
WFKnight 0:9b3d4731edbb 50 }
WFKnight 0:9b3d4731edbb 51
WFKnight 0:9b3d4731edbb 52 void analogout_write(dac_t *obj, float value)
WFKnight 0:9b3d4731edbb 53 {
WFKnight 0:9b3d4731edbb 54 if (value < 0.0f) {
WFKnight 0:9b3d4731edbb 55 dac_write(obj, 0); // Min value
WFKnight 0:9b3d4731edbb 56 } else if (value > 1.0f) {
WFKnight 0:9b3d4731edbb 57 dac_write(obj, (int)DAC_RANGE); // Max value
WFKnight 0:9b3d4731edbb 58 } else {
WFKnight 0:9b3d4731edbb 59 dac_write(obj, (int)(value * (float)DAC_RANGE));
WFKnight 0:9b3d4731edbb 60 }
WFKnight 0:9b3d4731edbb 61 }
WFKnight 0:9b3d4731edbb 62
WFKnight 0:9b3d4731edbb 63 void analogout_write_u16(dac_t *obj, uint16_t value)
WFKnight 0:9b3d4731edbb 64 {
WFKnight 0:9b3d4731edbb 65 dac_write(obj, value >> (16 - DAC_NB_BITS));
WFKnight 0:9b3d4731edbb 66 }
WFKnight 0:9b3d4731edbb 67
WFKnight 0:9b3d4731edbb 68 float analogout_read(dac_t *obj)
WFKnight 0:9b3d4731edbb 69 {
WFKnight 0:9b3d4731edbb 70 uint32_t value = dac_read(obj);
WFKnight 0:9b3d4731edbb 71 return (float)value * (1.0f / (float)DAC_RANGE);
WFKnight 0:9b3d4731edbb 72 }
WFKnight 0:9b3d4731edbb 73
WFKnight 0:9b3d4731edbb 74 uint16_t analogout_read_u16(dac_t *obj)
WFKnight 0:9b3d4731edbb 75 {
WFKnight 0:9b3d4731edbb 76 uint32_t value = dac_read(obj);
WFKnight 0:9b3d4731edbb 77 return (value << 4) | ((value >> 8) & 0x000F); // Conversion from 12 to 16 bits
WFKnight 0:9b3d4731edbb 78 }
WFKnight 0:9b3d4731edbb 79
WFKnight 0:9b3d4731edbb 80 #endif // DEVICE_ANALOGOUT