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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Superseded

This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.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@227:7bd0639b8911, 2014-06-11 (annotated)

Committer:
mbed_official
Date:
Wed Jun 11 16:00:09 2014 +0100
Revision:
227:7bd0639b8911
Parent:
82:0b31dbcd4769 
Synchronized with git revision d58d532ebc0e0a96f4fffb8edefc082b71b964af



Full URL: https://github.com/mbedmicro/mbed/commit/d58d532ebc0e0a96f4fffb8edefc082b71b964af/

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 227:7bd0639b8911 16 #include "mbed_assert.h"
mbed_official 82:0b31dbcd4769 17 #include "analogout_api.h"
mbed_official 82:0b31dbcd4769 18
mbed_official 82:0b31dbcd4769 19 #include "cmsis.h"
mbed_official 82:0b31dbcd4769 20 #include "pinmap.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 void analogout_init(dac_t *obj, PinName pin) {
mbed_official 82:0b31dbcd4769 26 obj->dac = (DACName)pinmap_peripheral(pin, PinMap_DAC);
mbed_official 227:7bd0639b8911 27 MBED_ASSERT(obj->dac != (DACName)NC);
mbed_official 82:0b31dbcd4769 28
mbed_official 82:0b31dbcd4769 29 SIM->SCGC6 |= SIM_SCGC6_DAC0_MASK;
mbed_official 82:0b31dbcd4769 30
mbed_official 82:0b31dbcd4769 31 uint32_t port = (uint32_t)pin >> PORT_SHIFT;
mbed_official 82:0b31dbcd4769 32 SIM->SCGC5 |= 1 << (SIM_SCGC5_PORTA_SHIFT + port);
mbed_official 82:0b31dbcd4769 33
mbed_official 82:0b31dbcd4769 34 DAC0->DAT[obj->dac].DATH = 0;
mbed_official 82:0b31dbcd4769 35 DAC0->DAT[obj->dac].DATL = 0;
mbed_official 82:0b31dbcd4769 36
mbed_official 82:0b31dbcd4769 37 DAC0->C1 = DAC_C1_DACBFMD_MASK; // One-Time Scan Mode
mbed_official 82:0b31dbcd4769 38
mbed_official 82:0b31dbcd4769 39 DAC0->C0 = DAC_C0_DACEN_MASK // Enable
mbed_official 82:0b31dbcd4769 40 | DAC_C0_DACSWTRG_MASK; // Software Trigger
mbed_official 82:0b31dbcd4769 41
mbed_official 82:0b31dbcd4769 42 pinmap_pinout(pin, PinMap_DAC);
mbed_official 82:0b31dbcd4769 43
mbed_official 82:0b31dbcd4769 44 analogout_write_u16(obj, 0);
mbed_official 82:0b31dbcd4769 45 }
mbed_official 82:0b31dbcd4769 46
mbed_official 82:0b31dbcd4769 47 void analogout_free(dac_t *obj) {}
mbed_official 82:0b31dbcd4769 48
mbed_official 82:0b31dbcd4769 49 static inline void dac_write(dac_t *obj, int value) {
mbed_official 82:0b31dbcd4769 50 DAC0->DAT[obj->dac].DATL = (uint8_t)( value & 0xFF);
mbed_official 82:0b31dbcd4769 51 DAC0->DAT[obj->dac].DATH = (uint8_t)((value >> 8) & 0xFF);
mbed_official 82:0b31dbcd4769 52 }
mbed_official 82:0b31dbcd4769 53
mbed_official 82:0b31dbcd4769 54 static inline int dac_read(dac_t *obj) {
mbed_official 82:0b31dbcd4769 55 return ((DAC0->DAT[obj->dac].DATH << 8) | DAC0->DAT[obj->dac].DATL);
mbed_official 82:0b31dbcd4769 56 }
mbed_official 82:0b31dbcd4769 57
mbed_official 82:0b31dbcd4769 58 void analogout_write(dac_t *obj, float value) {
mbed_official 82:0b31dbcd4769 59 if (value < 0.0) {
mbed_official 82:0b31dbcd4769 60 dac_write(obj, 0);
mbed_official 82:0b31dbcd4769 61 } else if (value > 1.0) {
mbed_official 82:0b31dbcd4769 62 dac_write(obj, RANGE_12BIT);
mbed_official 82:0b31dbcd4769 63 } else {
mbed_official 82:0b31dbcd4769 64 dac_write(obj, value * (float)RANGE_12BIT);
mbed_official 82:0b31dbcd4769 65 }
mbed_official 82:0b31dbcd4769 66 }
mbed_official 82:0b31dbcd4769 67
mbed_official 82:0b31dbcd4769 68 void analogout_write_u16(dac_t *obj, uint16_t value) {
mbed_official 82:0b31dbcd4769 69 dac_write(obj, value >> 4); // 12-bit
mbed_official 82:0b31dbcd4769 70 }
mbed_official 82:0b31dbcd4769 71
mbed_official 82:0b31dbcd4769 72 float analogout_read(dac_t *obj) {
mbed_official 82:0b31dbcd4769 73 uint32_t value = dac_read(obj);
mbed_official 82:0b31dbcd4769 74 return (float)value * (1.0f / (float)RANGE_12BIT);
mbed_official 82:0b31dbcd4769 75 }
mbed_official 82:0b31dbcd4769 76
mbed_official 82:0b31dbcd4769 77 uint16_t analogout_read_u16(dac_t *obj) {
mbed_official 82:0b31dbcd4769 78 uint32_t value = dac_read(obj); // 12-bit
mbed_official 82:0b31dbcd4769 79 return (value << 4) | ((value >> 8) & 0x003F);
mbed_official 82:0b31dbcd4769 80 }