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Last commit 20 Feb 2019 by mbed official

targets/hal/TARGET_Freescale/TARGET_KL25Z/analogout_api.c@13:0645d8841f51, 2013-08-05 (annotated)

Committer:
bogdanm
Date:
Mon Aug 05 14:12:34 2013 +0300
Revision:
13:0645d8841f51
Parent:
vendor/Freescale/KL25Z/hal/analogout_api.c@10:3bc89ef62ce7
Child:
19:398f4c622e1b
Update mbed sources to revision 64

Who changed what in which revision?

UserRevisionLine numberNew contents of line
emilmont 10:3bc89ef62ce7 1 /* mbed Microcontroller Library
emilmont 10:3bc89ef62ce7 2 * Copyright (c) 2006-2013 ARM Limited
emilmont 10:3bc89ef62ce7 3 *
emilmont 10:3bc89ef62ce7 4 * Licensed under the Apache License, Version 2.0 (the "License");
emilmont 10:3bc89ef62ce7 5 * you may not use this file except in compliance with the License.
emilmont 10:3bc89ef62ce7 6 * You may obtain a copy of the License at
emilmont 10:3bc89ef62ce7 7 *
emilmont 10:3bc89ef62ce7 8 * http://www.apache.org/licenses/LICENSE-2.0
emilmont 10:3bc89ef62ce7 9 *
emilmont 10:3bc89ef62ce7 10 * Unless required by applicable law or agreed to in writing, software
emilmont 10:3bc89ef62ce7 11 * distributed under the License is distributed on an "AS IS" BASIS,
emilmont 10:3bc89ef62ce7 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
emilmont 10:3bc89ef62ce7 13 * See the License for the specific language governing permissions and
emilmont 10:3bc89ef62ce7 14 * limitations under the License.
emilmont 10:3bc89ef62ce7 15 */
emilmont 10:3bc89ef62ce7 16 #include "analogout_api.h"
emilmont 10:3bc89ef62ce7 17
emilmont 10:3bc89ef62ce7 18 #include "cmsis.h"
emilmont 10:3bc89ef62ce7 19 #include "pinmap.h"
emilmont 10:3bc89ef62ce7 20 #include "error.h"
emilmont 10:3bc89ef62ce7 21
emilmont 10:3bc89ef62ce7 22 #define RANGE_12BIT 0xFFF
emilmont 10:3bc89ef62ce7 23
emilmont 10:3bc89ef62ce7 24 static const PinMap PinMap_DAC[] = {
emilmont 10:3bc89ef62ce7 25 {PTE30, DAC_0, 0},
emilmont 10:3bc89ef62ce7 26 {NC , NC , 0}
emilmont 10:3bc89ef62ce7 27 };
emilmont 10:3bc89ef62ce7 28
emilmont 10:3bc89ef62ce7 29 void analogout_init(dac_t *obj, PinName pin) {
emilmont 10:3bc89ef62ce7 30 obj->dac = (DACName)pinmap_peripheral(pin, PinMap_DAC);
emilmont 10:3bc89ef62ce7 31 if (obj->dac == (uint32_t)NC) {
emilmont 10:3bc89ef62ce7 32 error("DAC pin mapping failed");
emilmont 10:3bc89ef62ce7 33 }
emilmont 10:3bc89ef62ce7 34
emilmont 10:3bc89ef62ce7 35 SIM->SCGC6 |= SIM_SCGC6_DAC0_MASK;
emilmont 10:3bc89ef62ce7 36
emilmont 10:3bc89ef62ce7 37 uint32_t port = (uint32_t)pin >> PORT_SHIFT;
emilmont 10:3bc89ef62ce7 38 SIM->SCGC5 |= 1 << (SIM_SCGC5_PORTA_SHIFT + port);
emilmont 10:3bc89ef62ce7 39
emilmont 10:3bc89ef62ce7 40 DAC0->DAT[obj->dac].DATH = 0;
emilmont 10:3bc89ef62ce7 41 DAC0->DAT[obj->dac].DATL = 0;
emilmont 10:3bc89ef62ce7 42
emilmont 10:3bc89ef62ce7 43 DAC0->C1 = DAC_C1_DACBFMD_MASK; // One-Time Scan Mode
emilmont 10:3bc89ef62ce7 44
emilmont 10:3bc89ef62ce7 45 DAC0->C0 = DAC_C0_DACEN_MASK // Enable
emilmont 10:3bc89ef62ce7 46 | DAC_C0_DACSWTRG_MASK; // Software Trigger
emilmont 10:3bc89ef62ce7 47
emilmont 10:3bc89ef62ce7 48 pinmap_pinout(pin, PinMap_DAC);
emilmont 10:3bc89ef62ce7 49
emilmont 10:3bc89ef62ce7 50 analogout_write_u16(obj, 0);
emilmont 10:3bc89ef62ce7 51 }
emilmont 10:3bc89ef62ce7 52
emilmont 10:3bc89ef62ce7 53 void analogout_free(dac_t *obj) {}
emilmont 10:3bc89ef62ce7 54
emilmont 10:3bc89ef62ce7 55 static inline void dac_write(dac_t *obj, int value) {
emilmont 10:3bc89ef62ce7 56 DAC0->DAT[obj->dac].DATL = (uint8_t)( value & 0xFF);
emilmont 10:3bc89ef62ce7 57 DAC0->DAT[obj->dac].DATH = (uint8_t)((value >> 8) & 0xFF);
emilmont 10:3bc89ef62ce7 58 }
emilmont 10:3bc89ef62ce7 59
emilmont 10:3bc89ef62ce7 60 static inline int dac_read(dac_t *obj) {
emilmont 10:3bc89ef62ce7 61 return ((DAC0->DAT[obj->dac].DATH << 8) | DAC0->DAT[obj->dac].DATL);
emilmont 10:3bc89ef62ce7 62 }
emilmont 10:3bc89ef62ce7 63
emilmont 10:3bc89ef62ce7 64 void analogout_write(dac_t *obj, float value) {
emilmont 10:3bc89ef62ce7 65 if (value < 0.0) {
emilmont 10:3bc89ef62ce7 66 dac_write(obj, 0);
emilmont 10:3bc89ef62ce7 67 } else if (value > 1.0) {
emilmont 10:3bc89ef62ce7 68 dac_write(obj, RANGE_12BIT);
emilmont 10:3bc89ef62ce7 69 } else {
emilmont 10:3bc89ef62ce7 70 dac_write(obj, value * (float)RANGE_12BIT);
emilmont 10:3bc89ef62ce7 71 }
emilmont 10:3bc89ef62ce7 72 }
emilmont 10:3bc89ef62ce7 73
emilmont 10:3bc89ef62ce7 74 void analogout_write_u16(dac_t *obj, uint16_t value) {
emilmont 10:3bc89ef62ce7 75 dac_write(obj, value >> 4); // 12-bit
emilmont 10:3bc89ef62ce7 76 }
emilmont 10:3bc89ef62ce7 77
emilmont 10:3bc89ef62ce7 78 float analogout_read(dac_t *obj) {
emilmont 10:3bc89ef62ce7 79 uint32_t value = dac_read(obj);
emilmont 10:3bc89ef62ce7 80 return (float)value * (1.0f / (float)RANGE_12BIT);
emilmont 10:3bc89ef62ce7 81 }
emilmont 10:3bc89ef62ce7 82
emilmont 10:3bc89ef62ce7 83 uint16_t analogout_read_u16(dac_t *obj) {
emilmont 10:3bc89ef62ce7 84 uint32_t value = dac_read(obj); // 12-bit
emilmont 10:3bc89ef62ce7 85 return (value << 4) | ((value >> 8) & 0x003F);
emilmont 10:3bc89ef62ce7 86 }