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mbed library sources

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Superseded

This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.

Development branch of the mbed library sources. This library is kept in synch with the latest changes from the mbed SDK and it is not guaranteed to work.

If you are looking for a stable and tested release, please import one of the official mbed library releases:

Import librarymbed

The official Mbed 2 C/C++ SDK provides the software platform and libraries to build your applications.

Last commit 20 Feb 2019 by mbed official

targets/hal/TARGET_Freescale/TARGET_KPSDK_MCUS/analogout_api.c@621:9c82b0f79f3d, 2015-09-11 (annotated)

Committer:
mbed_official
Date:
Fri Sep 11 09:30:09 2015 +0100
Revision:
621:9c82b0f79f3d
Parent:
324:406fd2029f23 
Synchronized with git revision 6c1d63e069ab9bd86de92e8296ca783681257538



Full URL: https://github.com/mbedmicro/mbed/commit/6c1d63e069ab9bd86de92e8296ca783681257538/



ignore target files not supported by the yotta module

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 324:406fd2029f23 1 /* mbed Microcontroller Library
mbed_official 324:406fd2029f23 2 * Copyright (c) 2006-2013 ARM Limited
mbed_official 324:406fd2029f23 3 *
mbed_official 324:406fd2029f23 4 * Licensed under the Apache License, Version 2.0 (the "License");
mbed_official 324:406fd2029f23 5 * you may not use this file except in compliance with the License.
mbed_official 324:406fd2029f23 6 * You may obtain a copy of the License at
mbed_official 324:406fd2029f23 7 *
mbed_official 324:406fd2029f23 8 * http://www.apache.org/licenses/LICENSE-2.0
mbed_official 324:406fd2029f23 9 *
mbed_official 324:406fd2029f23 10 * Unless required by applicable law or agreed to in writing, software
mbed_official 324:406fd2029f23 11 * distributed under the License is distributed on an "AS IS" BASIS,
mbed_official 324:406fd2029f23 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mbed_official 324:406fd2029f23 13 * See the License for the specific language governing permissions and
mbed_official 324:406fd2029f23 14 * limitations under the License.
mbed_official 324:406fd2029f23 15 */
mbed_official 324:406fd2029f23 16 #include "analogout_api.h"
mbed_official 324:406fd2029f23 17
mbed_official 324:406fd2029f23 18 #if DEVICE_ANALOGOUT
mbed_official 324:406fd2029f23 19
mbed_official 324:406fd2029f23 20 #include "cmsis.h"
mbed_official 324:406fd2029f23 21 #include "pinmap.h"
mbed_official 324:406fd2029f23 22 #include "mbed_error.h"
mbed_official 324:406fd2029f23 23 #include "PeripheralPins.h"
mbed_official 324:406fd2029f23 24 #include "fsl_clock_manager.h"
mbed_official 324:406fd2029f23 25
mbed_official 324:406fd2029f23 26 #define RANGE_12BIT 0xFFF
mbed_official 324:406fd2029f23 27
mbed_official 324:406fd2029f23 28 void analogout_init(dac_t *obj, PinName pin) {
mbed_official 324:406fd2029f23 29 obj->dac = (DACName)pinmap_peripheral(pin, PinMap_DAC);
mbed_official 324:406fd2029f23 30 if (obj->dac == (DACName)NC) {
mbed_official 324:406fd2029f23 31 error("DAC pin mapping failed");
mbed_official 324:406fd2029f23 32 }
mbed_official 324:406fd2029f23 33
mbed_official 324:406fd2029f23 34 SIM_HAL_EnableDacClock(SIM_BASE, 0);
mbed_official 324:406fd2029f23 35
mbed_official 324:406fd2029f23 36 DAC0->DAT[obj->dac].DATH = 0;
mbed_official 324:406fd2029f23 37 DAC0->DAT[obj->dac].DATL = 0;
mbed_official 324:406fd2029f23 38
mbed_official 324:406fd2029f23 39 DAC0->C1 = DAC_C1_DACBFMD(2); // One-Time Scan Mode
mbed_official 324:406fd2029f23 40
mbed_official 324:406fd2029f23 41 DAC0->C0 = DAC_C0_DACEN_MASK // Enable
mbed_official 324:406fd2029f23 42 | DAC_C0_DACSWTRG_MASK // Software Trigger
mbed_official 324:406fd2029f23 43 | DAC_C0_DACRFS_MASK; // VDDA selected
mbed_official 324:406fd2029f23 44
mbed_official 324:406fd2029f23 45 analogout_write_u16(obj, 0);
mbed_official 324:406fd2029f23 46 }
mbed_official 324:406fd2029f23 47
mbed_official 324:406fd2029f23 48 void analogout_free(dac_t *obj) {}
mbed_official 324:406fd2029f23 49
mbed_official 324:406fd2029f23 50 static inline void dac_write(dac_t *obj, int value) {
mbed_official 324:406fd2029f23 51 DAC0->DAT[obj->dac].DATL = (uint8_t)( value & 0xFF);
mbed_official 324:406fd2029f23 52 DAC0->DAT[obj->dac].DATH = (uint8_t)((value >> 8) & 0xFF);
mbed_official 324:406fd2029f23 53 }
mbed_official 324:406fd2029f23 54
mbed_official 324:406fd2029f23 55 static inline int dac_read(dac_t *obj) {
mbed_official 324:406fd2029f23 56 return ((DAC0->DAT[obj->dac].DATH << 8) | DAC0->DAT[obj->dac].DATL);
mbed_official 324:406fd2029f23 57 }
mbed_official 324:406fd2029f23 58
mbed_official 324:406fd2029f23 59 void analogout_write(dac_t *obj, float value) {
mbed_official 324:406fd2029f23 60 if (value < 0.0f) {
mbed_official 324:406fd2029f23 61 dac_write(obj, 0);
mbed_official 324:406fd2029f23 62 } else if (value > 1.0f) {
mbed_official 324:406fd2029f23 63 dac_write(obj, RANGE_12BIT);
mbed_official 324:406fd2029f23 64 } else {
mbed_official 324:406fd2029f23 65 dac_write(obj, value * (float)RANGE_12BIT);
mbed_official 324:406fd2029f23 66 }
mbed_official 324:406fd2029f23 67 }
mbed_official 324:406fd2029f23 68
mbed_official 324:406fd2029f23 69 void analogout_write_u16(dac_t *obj, uint16_t value) {
mbed_official 324:406fd2029f23 70 dac_write(obj, value >> 4); // 12-bit
mbed_official 324:406fd2029f23 71 }
mbed_official 324:406fd2029f23 72
mbed_official 324:406fd2029f23 73 float analogout_read(dac_t *obj) {
mbed_official 324:406fd2029f23 74 uint32_t value = dac_read(obj);
mbed_official 324:406fd2029f23 75 return (float)value * (1.0f / (float)RANGE_12BIT);
mbed_official 324:406fd2029f23 76 }
mbed_official 324:406fd2029f23 77
mbed_official 324:406fd2029f23 78 uint16_t analogout_read_u16(dac_t *obj) {
mbed_official 324:406fd2029f23 79 uint32_t value = dac_read(obj); // 12-bit
mbed_official 324:406fd2029f23 80 return (value << 4) | ((value >> 8) & 0x003F);
mbed_official 324:406fd2029f23 81 }
mbed_official 324:406fd2029f23 82
mbed_official 324:406fd2029f23 83 #endif