shao ziyang / mbed-src-kl05

mbed library sources

Dependents:   frdm_kl05z_gpio_test

Fork of mbed-src by mbed official

targets/hal/TARGET_Freescale/TARGET_KPSDK_MCUS/TARGET_K64F/analogout_api.c@265:9632ea190e16, 2014-07-23 (annotated)

Committer:
mbed_official
Date:
Wed Jul 23 21:15:06 2014 +0100
Revision:
265:9632ea190e16
Parent:
251:de9a1e4ffd79
Child:
267:8673334f2cbe
Synchronized with git revision 7a5896cba254ab45829b43f6cef5563706ebba2b



Full URL: https://github.com/mbedmicro/mbed/commit/7a5896cba254ab45829b43f6cef5563706ebba2b/



[MTS_GAMBIT] Add new target support

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 146:f64d43ff0c18 1 /* mbed Microcontroller Library
mbed_official 146:f64d43ff0c18 2 * Copyright (c) 2006-2013 ARM Limited
mbed_official 146:f64d43ff0c18 3 *
mbed_official 146:f64d43ff0c18 4 * Licensed under the Apache License, Version 2.0 (the "License");
mbed_official 146:f64d43ff0c18 5 * you may not use this file except in compliance with the License.
mbed_official 146:f64d43ff0c18 6 * You may obtain a copy of the License at
mbed_official 146:f64d43ff0c18 7 *
mbed_official 146:f64d43ff0c18 8 * http://www.apache.org/licenses/LICENSE-2.0
mbed_official 146:f64d43ff0c18 9 *
mbed_official 146:f64d43ff0c18 10 * Unless required by applicable law or agreed to in writing, software
mbed_official 146:f64d43ff0c18 11 * distributed under the License is distributed on an "AS IS" BASIS,
mbed_official 146:f64d43ff0c18 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mbed_official 146:f64d43ff0c18 13 * See the License for the specific language governing permissions and
mbed_official 146:f64d43ff0c18 14 * limitations under the License.
mbed_official 146:f64d43ff0c18 15 */
mbed_official 146:f64d43ff0c18 16 #include "analogout_api.h"
mbed_official 146:f64d43ff0c18 17
mbed_official 146:f64d43ff0c18 18 #include "cmsis.h"
mbed_official 146:f64d43ff0c18 19 #include "pinmap.h"
mbed_official 251:de9a1e4ffd79 20 #include "error.h"
mbed_official 265:9632ea190e16 21 #include "PeripheralPins.h"
mbed_official 146:f64d43ff0c18 22
mbed_official 146:f64d43ff0c18 23 #define RANGE_12BIT 0xFFF
mbed_official 146:f64d43ff0c18 24
mbed_official 146:f64d43ff0c18 25 void analogout_init(dac_t *obj, PinName pin) {
mbed_official 146:f64d43ff0c18 26 obj->dac = (DACName)pinmap_peripheral(pin, PinMap_DAC);
mbed_official 146:f64d43ff0c18 27 if (obj->dac == (DACName)NC) {
mbed_official 146:f64d43ff0c18 28 error("DAC pin mapping failed");
mbed_official 146:f64d43ff0c18 29 }
mbed_official 146:f64d43ff0c18 30
mbed_official 146:f64d43ff0c18 31 SIM->SCGC2 |= SIM_SCGC2_DAC0_MASK;
mbed_official 146:f64d43ff0c18 32
mbed_official 146:f64d43ff0c18 33 DAC0->DAT[obj->dac].DATH = 0;
mbed_official 146:f64d43ff0c18 34 DAC0->DAT[obj->dac].DATL = 0;
mbed_official 146:f64d43ff0c18 35
mbed_official 146:f64d43ff0c18 36 DAC0->C1 = DAC_C1_DACBFMD(2); // One-Time Scan Mode
mbed_official 146:f64d43ff0c18 37
mbed_official 146:f64d43ff0c18 38 DAC0->C0 = DAC_C0_DACEN_MASK // Enable
mbed_official 146:f64d43ff0c18 39 | DAC_C0_DACSWTRG_MASK // Software Trigger
mbed_official 146:f64d43ff0c18 40 | DAC_C0_DACRFS_MASK; // VDDA selected
mbed_official 146:f64d43ff0c18 41
mbed_official 146:f64d43ff0c18 42 analogout_write_u16(obj, 0);
mbed_official 146:f64d43ff0c18 43 }
mbed_official 146:f64d43ff0c18 44
mbed_official 146:f64d43ff0c18 45 void analogout_free(dac_t *obj) {}
mbed_official 146:f64d43ff0c18 46
mbed_official 146:f64d43ff0c18 47 static inline void dac_write(dac_t *obj, int value) {
mbed_official 146:f64d43ff0c18 48 DAC0->DAT[obj->dac].DATL = (uint8_t)( value & 0xFF);
mbed_official 146:f64d43ff0c18 49 DAC0->DAT[obj->dac].DATH = (uint8_t)((value >> 8) & 0xFF);
mbed_official 146:f64d43ff0c18 50 }
mbed_official 146:f64d43ff0c18 51
mbed_official 146:f64d43ff0c18 52 static inline int dac_read(dac_t *obj) {
mbed_official 146:f64d43ff0c18 53 return ((DAC0->DAT[obj->dac].DATH << 8) | DAC0->DAT[obj->dac].DATL);
mbed_official 146:f64d43ff0c18 54 }
mbed_official 146:f64d43ff0c18 55
mbed_official 146:f64d43ff0c18 56 void analogout_write(dac_t *obj, float value) {
mbed_official 146:f64d43ff0c18 57 if (value < 0.0f) {
mbed_official 146:f64d43ff0c18 58 dac_write(obj, 0);
mbed_official 146:f64d43ff0c18 59 } else if (value > 1.0f) {
mbed_official 146:f64d43ff0c18 60 dac_write(obj, RANGE_12BIT);
mbed_official 146:f64d43ff0c18 61 } else {
mbed_official 146:f64d43ff0c18 62 dac_write(obj, value * (float)RANGE_12BIT);
mbed_official 146:f64d43ff0c18 63 }
mbed_official 146:f64d43ff0c18 64 }
mbed_official 146:f64d43ff0c18 65
mbed_official 146:f64d43ff0c18 66 void analogout_write_u16(dac_t *obj, uint16_t value) {
mbed_official 146:f64d43ff0c18 67 dac_write(obj, value >> 4); // 12-bit
mbed_official 146:f64d43ff0c18 68 }
mbed_official 146:f64d43ff0c18 69
mbed_official 146:f64d43ff0c18 70 float analogout_read(dac_t *obj) {
mbed_official 146:f64d43ff0c18 71 uint32_t value = dac_read(obj);
mbed_official 146:f64d43ff0c18 72 return (float)value * (1.0f / (float)RANGE_12BIT);
mbed_official 146:f64d43ff0c18 73 }
mbed_official 146:f64d43ff0c18 74
mbed_official 146:f64d43ff0c18 75 uint16_t analogout_read_u16(dac_t *obj) {
mbed_official 146:f64d43ff0c18 76 uint32_t value = dac_read(obj); // 12-bit
mbed_official 146:f64d43ff0c18 77 return (value << 4) | ((value >> 8) & 0x003F);
mbed_official 146:f64d43ff0c18 78 }