david dicarlo / mbed-src-FLL48

mbed library sources: Modified to operate FRDM-KL25Z at 48MHz from internal 32kHz oscillator (nothing else changed).

Fork of mbed-src by mbed official

The only file that changed is: mbed-src-FLL48/targets/cmsis/TARGET_Freescale/TARGET_KL25Z/system_MKL25Z4.h

targets/hal/TARGET_Freescale/TARGET_KL05Z/analogout_api.c@20:4263a77256ae, 2013-09-10 (annotated)

Committer:
bogdanm
Date:
Tue Sep 10 15:14:19 2013 +0300
Revision:
20:4263a77256ae
Sync with git revision 171dda705c947bf910926a0b73d6a4797802554d

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bogdanm 20:4263a77256ae 1 /* mbed Microcontroller Library
bogdanm 20:4263a77256ae 2 * Copyright (c) 2006-2013 ARM Limited
bogdanm 20:4263a77256ae 3 *
bogdanm 20:4263a77256ae 4 * Licensed under the Apache License, Version 2.0 (the "License");
bogdanm 20:4263a77256ae 5 * you may not use this file except in compliance with the License.
bogdanm 20:4263a77256ae 6 * You may obtain a copy of the License at
bogdanm 20:4263a77256ae 7 *
bogdanm 20:4263a77256ae 8 * http://www.apache.org/licenses/LICENSE-2.0
bogdanm 20:4263a77256ae 9 *
bogdanm 20:4263a77256ae 10 * Unless required by applicable law or agreed to in writing, software
bogdanm 20:4263a77256ae 11 * distributed under the License is distributed on an "AS IS" BASIS,
bogdanm 20:4263a77256ae 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
bogdanm 20:4263a77256ae 13 * See the License for the specific language governing permissions and
bogdanm 20:4263a77256ae 14 * limitations under the License.
bogdanm 20:4263a77256ae 15 */
bogdanm 20:4263a77256ae 16 #include "analogout_api.h"
bogdanm 20:4263a77256ae 17
bogdanm 20:4263a77256ae 18 #include "cmsis.h"
bogdanm 20:4263a77256ae 19 #include "pinmap.h"
bogdanm 20:4263a77256ae 20 #include "error.h"
bogdanm 20:4263a77256ae 21
bogdanm 20:4263a77256ae 22 #define RANGE_12BIT 0xFFF
bogdanm 20:4263a77256ae 23
bogdanm 20:4263a77256ae 24 static const PinMap PinMap_DAC[] = {
bogdanm 20:4263a77256ae 25 {PTB1, DAC_0, 0},
bogdanm 20:4263a77256ae 26 {NC , NC , 0}
bogdanm 20:4263a77256ae 27 };
bogdanm 20:4263a77256ae 28
bogdanm 20:4263a77256ae 29 void analogout_init(dac_t *obj, PinName pin) {
bogdanm 20:4263a77256ae 30 obj->dac = (DACName)pinmap_peripheral(pin, PinMap_DAC);
bogdanm 20:4263a77256ae 31 if (obj->dac == (uint32_t)NC) {
bogdanm 20:4263a77256ae 32 error("DAC pin mapping failed");
bogdanm 20:4263a77256ae 33 }
bogdanm 20:4263a77256ae 34
bogdanm 20:4263a77256ae 35 SIM->SCGC6 |= SIM_SCGC6_DAC0_MASK;
bogdanm 20:4263a77256ae 36
bogdanm 20:4263a77256ae 37 uint32_t port = (uint32_t)pin >> PORT_SHIFT;
bogdanm 20:4263a77256ae 38 SIM->SCGC5 |= 1 << (SIM_SCGC5_PORTA_SHIFT + port);
bogdanm 20:4263a77256ae 39
bogdanm 20:4263a77256ae 40 DAC0->DAT[obj->dac].DATH = 0;
bogdanm 20:4263a77256ae 41 DAC0->DAT[obj->dac].DATL = 0;
bogdanm 20:4263a77256ae 42
bogdanm 20:4263a77256ae 43 DAC0->C1 = DAC_C1_DACBFMD_MASK; // One-Time Scan Mode
bogdanm 20:4263a77256ae 44
bogdanm 20:4263a77256ae 45 DAC0->C0 = DAC_C0_DACEN_MASK // Enable
bogdanm 20:4263a77256ae 46 | DAC_C0_DACSWTRG_MASK; // Software Trigger
bogdanm 20:4263a77256ae 47
bogdanm 20:4263a77256ae 48 pinmap_pinout(pin, PinMap_DAC);
bogdanm 20:4263a77256ae 49
bogdanm 20:4263a77256ae 50 analogout_write_u16(obj, 0);
bogdanm 20:4263a77256ae 51 }
bogdanm 20:4263a77256ae 52
bogdanm 20:4263a77256ae 53 void analogout_free(dac_t *obj) {
bogdanm 20:4263a77256ae 54
bogdanm 20:4263a77256ae 55 }
bogdanm 20:4263a77256ae 56
bogdanm 20:4263a77256ae 57 static inline void dac_write(dac_t *obj, int value) {
bogdanm 20:4263a77256ae 58 DAC0->DAT[obj->dac].DATL = (uint8_t)( value & 0xFF);
bogdanm 20:4263a77256ae 59 DAC0->DAT[obj->dac].DATH = (uint8_t)((value >> 8) & 0xFF);
bogdanm 20:4263a77256ae 60 }
bogdanm 20:4263a77256ae 61
bogdanm 20:4263a77256ae 62 static inline int dac_read(dac_t *obj) {
bogdanm 20:4263a77256ae 63 return ((DAC0->DAT[obj->dac].DATH << 8) | DAC0->DAT[obj->dac].DATL);
bogdanm 20:4263a77256ae 64 }
bogdanm 20:4263a77256ae 65
bogdanm 20:4263a77256ae 66 void analogout_write(dac_t *obj, float value) {
bogdanm 20:4263a77256ae 67 if (value < 0.0) {
bogdanm 20:4263a77256ae 68 dac_write(obj, 0);
bogdanm 20:4263a77256ae 69 } else if (value > 1.0) {
bogdanm 20:4263a77256ae 70 dac_write(obj, RANGE_12BIT);
bogdanm 20:4263a77256ae 71 } else {
bogdanm 20:4263a77256ae 72 dac_write(obj, value * (float)RANGE_12BIT);
bogdanm 20:4263a77256ae 73 }
bogdanm 20:4263a77256ae 74 }
bogdanm 20:4263a77256ae 75
bogdanm 20:4263a77256ae 76 void analogout_write_u16(dac_t *obj, uint16_t value) {
bogdanm 20:4263a77256ae 77 dac_write(obj, value >> 4); // 12-bit
bogdanm 20:4263a77256ae 78 }
bogdanm 20:4263a77256ae 79
bogdanm 20:4263a77256ae 80 float analogout_read(dac_t *obj) {
bogdanm 20:4263a77256ae 81 uint32_t value = dac_read(obj);
bogdanm 20:4263a77256ae 82 return (float)value * (1.0f / (float)RANGE_12BIT);
bogdanm 20:4263a77256ae 83 }
bogdanm 20:4263a77256ae 84
bogdanm 20:4263a77256ae 85 uint16_t analogout_read_u16(dac_t *obj) {
bogdanm 20:4263a77256ae 86 uint32_t value = dac_read(obj); // 12-bit
bogdanm 20:4263a77256ae 87 return (value << 4) | ((value >> 8) & 0x003F);
bogdanm 20:4263a77256ae 88 }