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mbed library sources

Dependents:   Encrypted my_mbed lklk CyaSSL_DTLS_Cellular ... more

Superseded

This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.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_KLXX/analogout_api.c@111:ae4891ca7084, 2014-03-06 (annotated)

Committer:
mbed_official
Date:
Thu Mar 06 10:00:06 2014 +0000
Revision:
111:ae4891ca7084
Parent:
82:0b31dbcd4769
Child:
227:7bd0639b8911
Synchronized with git revision 955bd9a5c9e042f1cf30bbae2a99afaab8eb4cbf



Full URL: https://github.com/mbedmicro/mbed/commit/955bd9a5c9e042f1cf30bbae2a99afaab8eb4cbf/

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 82:0b31dbcd4769 1 /* mbed Microcontroller Library
mbed_official 82:0b31dbcd4769 2 * Copyright (c) 2006-2013 ARM Limited
mbed_official 82:0b31dbcd4769 3 *
mbed_official 82:0b31dbcd4769 4 * Licensed under the Apache License, Version 2.0 (the "License");
mbed_official 82:0b31dbcd4769 5 * you may not use this file except in compliance with the License.
mbed_official 82:0b31dbcd4769 6 * You may obtain a copy of the License at
mbed_official 82:0b31dbcd4769 7 *
mbed_official 82:0b31dbcd4769 8 * http://www.apache.org/licenses/LICENSE-2.0
mbed_official 82:0b31dbcd4769 9 *
mbed_official 82:0b31dbcd4769 10 * Unless required by applicable law or agreed to in writing, software
mbed_official 82:0b31dbcd4769 11 * distributed under the License is distributed on an "AS IS" BASIS,
mbed_official 82:0b31dbcd4769 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mbed_official 82:0b31dbcd4769 13 * See the License for the specific language governing permissions and
mbed_official 82:0b31dbcd4769 14 * limitations under the License.
mbed_official 82:0b31dbcd4769 15 */
mbed_official 82:0b31dbcd4769 16 #include "analogout_api.h"
mbed_official 82:0b31dbcd4769 17
mbed_official 82:0b31dbcd4769 18 #include "cmsis.h"
mbed_official 82:0b31dbcd4769 19 #include "pinmap.h"
mbed_official 82:0b31dbcd4769 20 #include "error.h"
mbed_official 82:0b31dbcd4769 21 #include "PeripheralPins.h"
mbed_official 82:0b31dbcd4769 22
mbed_official 82:0b31dbcd4769 23 #define RANGE_12BIT 0xFFF
mbed_official 82:0b31dbcd4769 24
mbed_official 82:0b31dbcd4769 25
mbed_official 82:0b31dbcd4769 26 void analogout_init(dac_t *obj, PinName pin) {
mbed_official 82:0b31dbcd4769 27 obj->dac = (DACName)pinmap_peripheral(pin, PinMap_DAC);
mbed_official 82:0b31dbcd4769 28 if (obj->dac == (DACName)NC) {
mbed_official 82:0b31dbcd4769 29 error("DAC pin mapping failed");
mbed_official 82:0b31dbcd4769 30 }
mbed_official 82:0b31dbcd4769 31
mbed_official 82:0b31dbcd4769 32 SIM->SCGC6 |= SIM_SCGC6_DAC0_MASK;
mbed_official 82:0b31dbcd4769 33
mbed_official 82:0b31dbcd4769 34 uint32_t port = (uint32_t)pin >> PORT_SHIFT;
mbed_official 82:0b31dbcd4769 35 SIM->SCGC5 |= 1 << (SIM_SCGC5_PORTA_SHIFT + port);
mbed_official 82:0b31dbcd4769 36
mbed_official 82:0b31dbcd4769 37 DAC0->DAT[obj->dac].DATH = 0;
mbed_official 82:0b31dbcd4769 38 DAC0->DAT[obj->dac].DATL = 0;
mbed_official 82:0b31dbcd4769 39
mbed_official 82:0b31dbcd4769 40 DAC0->C1 = DAC_C1_DACBFMD_MASK; // One-Time Scan Mode
mbed_official 82:0b31dbcd4769 41
mbed_official 82:0b31dbcd4769 42 DAC0->C0 = DAC_C0_DACEN_MASK // Enable
mbed_official 82:0b31dbcd4769 43 | DAC_C0_DACSWTRG_MASK; // Software Trigger
mbed_official 82:0b31dbcd4769 44
mbed_official 82:0b31dbcd4769 45 pinmap_pinout(pin, PinMap_DAC);
mbed_official 82:0b31dbcd4769 46
mbed_official 82:0b31dbcd4769 47 analogout_write_u16(obj, 0);
mbed_official 82:0b31dbcd4769 48 }
mbed_official 82:0b31dbcd4769 49
mbed_official 82:0b31dbcd4769 50 void analogout_free(dac_t *obj) {}
mbed_official 82:0b31dbcd4769 51
mbed_official 82:0b31dbcd4769 52 static inline void dac_write(dac_t *obj, int value) {
mbed_official 82:0b31dbcd4769 53 DAC0->DAT[obj->dac].DATL = (uint8_t)( value & 0xFF);
mbed_official 82:0b31dbcd4769 54 DAC0->DAT[obj->dac].DATH = (uint8_t)((value >> 8) & 0xFF);
mbed_official 82:0b31dbcd4769 55 }
mbed_official 82:0b31dbcd4769 56
mbed_official 82:0b31dbcd4769 57 static inline int dac_read(dac_t *obj) {
mbed_official 82:0b31dbcd4769 58 return ((DAC0->DAT[obj->dac].DATH << 8) | DAC0->DAT[obj->dac].DATL);
mbed_official 82:0b31dbcd4769 59 }
mbed_official 82:0b31dbcd4769 60
mbed_official 82:0b31dbcd4769 61 void analogout_write(dac_t *obj, float value) {
mbed_official 82:0b31dbcd4769 62 if (value < 0.0) {
mbed_official 82:0b31dbcd4769 63 dac_write(obj, 0);
mbed_official 82:0b31dbcd4769 64 } else if (value > 1.0) {
mbed_official 82:0b31dbcd4769 65 dac_write(obj, RANGE_12BIT);
mbed_official 82:0b31dbcd4769 66 } else {
mbed_official 82:0b31dbcd4769 67 dac_write(obj, value * (float)RANGE_12BIT);
mbed_official 82:0b31dbcd4769 68 }
mbed_official 82:0b31dbcd4769 69 }
mbed_official 82:0b31dbcd4769 70
mbed_official 82:0b31dbcd4769 71 void analogout_write_u16(dac_t *obj, uint16_t value) {
mbed_official 82:0b31dbcd4769 72 dac_write(obj, value >> 4); // 12-bit
mbed_official 82:0b31dbcd4769 73 }
mbed_official 82:0b31dbcd4769 74
mbed_official 82:0b31dbcd4769 75 float analogout_read(dac_t *obj) {
mbed_official 82:0b31dbcd4769 76 uint32_t value = dac_read(obj);
mbed_official 82:0b31dbcd4769 77 return (float)value * (1.0f / (float)RANGE_12BIT);
mbed_official 82:0b31dbcd4769 78 }
mbed_official 82:0b31dbcd4769 79
mbed_official 82:0b31dbcd4769 80 uint16_t analogout_read_u16(dac_t *obj) {
mbed_official 82:0b31dbcd4769 81 uint32_t value = dac_read(obj); // 12-bit
mbed_official 82:0b31dbcd4769 82 return (value << 4) | ((value >> 8) & 0x003F);
mbed_official 82:0b31dbcd4769 83 }