ON Semiconductor / mbed-os

5.2.1 - Updated I2C files

Dependents:   mbed-TFT-example-NCS36510 mbed-Accelerometer-example-NCS36510 mbed-Accelerometer-example-NCS36510

targets/TARGET_Freescale/TARGET_KLXX/analogout_api.c@1:f30bdcd2b33b, 2017-02-27 (annotated)

Committer:
jacobjohnson
Date:
Mon Feb 27 17:45:05 2017 +0000
Revision:
1:f30bdcd2b33b
Parent:
0:098463de4c5d 
changed the inputscale from 1 to 7 in analogin_api.c.  This will need to be changed later, and accessed from the main level, but for now this allows the  adc to read a value from 0 to 3.7V, instead of just up to 1V.;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
group-onsemi 0:098463de4c5d 1 /* mbed Microcontroller Library
group-onsemi 0:098463de4c5d 2 * Copyright (c) 2006-2013 ARM Limited
group-onsemi 0:098463de4c5d 3 *
group-onsemi 0:098463de4c5d 4 * Licensed under the Apache License, Version 2.0 (the "License");
group-onsemi 0:098463de4c5d 5 * you may not use this file except in compliance with the License.
group-onsemi 0:098463de4c5d 6 * You may obtain a copy of the License at
group-onsemi 0:098463de4c5d 7 *
group-onsemi 0:098463de4c5d 8 * http://www.apache.org/licenses/LICENSE-2.0
group-onsemi 0:098463de4c5d 9 *
group-onsemi 0:098463de4c5d 10 * Unless required by applicable law or agreed to in writing, software
group-onsemi 0:098463de4c5d 11 * distributed under the License is distributed on an "AS IS" BASIS,
group-onsemi 0:098463de4c5d 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
group-onsemi 0:098463de4c5d 13 * See the License for the specific language governing permissions and
group-onsemi 0:098463de4c5d 14 * limitations under the License.
group-onsemi 0:098463de4c5d 15 */
group-onsemi 0:098463de4c5d 16 #include "mbed_assert.h"
group-onsemi 0:098463de4c5d 17 #include "analogout_api.h"
group-onsemi 0:098463de4c5d 18
group-onsemi 0:098463de4c5d 19 #include "cmsis.h"
group-onsemi 0:098463de4c5d 20 #include "pinmap.h"
group-onsemi 0:098463de4c5d 21 #include "PeripheralPins.h"
group-onsemi 0:098463de4c5d 22
group-onsemi 0:098463de4c5d 23 #define RANGE_12BIT 0xFFF
group-onsemi 0:098463de4c5d 24
group-onsemi 0:098463de4c5d 25 void analogout_init(dac_t *obj, PinName pin) {
group-onsemi 0:098463de4c5d 26 obj->dac = (DACName)pinmap_peripheral(pin, PinMap_DAC);
group-onsemi 0:098463de4c5d 27 MBED_ASSERT(obj->dac != (DACName)NC);
group-onsemi 0:098463de4c5d 28
group-onsemi 0:098463de4c5d 29 SIM->SCGC6 |= SIM_SCGC6_DAC0_MASK;
group-onsemi 0:098463de4c5d 30
group-onsemi 0:098463de4c5d 31 uint32_t port = (uint32_t)pin >> PORT_SHIFT;
group-onsemi 0:098463de4c5d 32 SIM->SCGC5 |= 1 << (SIM_SCGC5_PORTA_SHIFT + port);
group-onsemi 0:098463de4c5d 33
group-onsemi 0:098463de4c5d 34 DAC0->DAT[obj->dac].DATH = 0;
group-onsemi 0:098463de4c5d 35 DAC0->DAT[obj->dac].DATL = 0;
group-onsemi 0:098463de4c5d 36
group-onsemi 0:098463de4c5d 37 DAC0->C1 = DAC_C1_DACBFMD_MASK; // One-Time Scan Mode
group-onsemi 0:098463de4c5d 38
group-onsemi 0:098463de4c5d 39 DAC0->C0 = DAC_C0_DACEN_MASK // Enable
group-onsemi 0:098463de4c5d 40 | DAC_C0_DACSWTRG_MASK; // Software Trigger
group-onsemi 0:098463de4c5d 41
group-onsemi 0:098463de4c5d 42 pinmap_pinout(pin, PinMap_DAC);
group-onsemi 0:098463de4c5d 43
group-onsemi 0:098463de4c5d 44 analogout_write_u16(obj, 0);
group-onsemi 0:098463de4c5d 45 }
group-onsemi 0:098463de4c5d 46
group-onsemi 0:098463de4c5d 47 void analogout_free(dac_t *obj) {}
group-onsemi 0:098463de4c5d 48
group-onsemi 0:098463de4c5d 49 static inline void dac_write(dac_t *obj, int value) {
group-onsemi 0:098463de4c5d 50 DAC0->DAT[obj->dac].DATL = (uint8_t)( value & 0xFF);
group-onsemi 0:098463de4c5d 51 DAC0->DAT[obj->dac].DATH = (uint8_t)((value >> 8) & 0xFF);
group-onsemi 0:098463de4c5d 52 }
group-onsemi 0:098463de4c5d 53
group-onsemi 0:098463de4c5d 54 static inline int dac_read(dac_t *obj) {
group-onsemi 0:098463de4c5d 55 return ((DAC0->DAT[obj->dac].DATH << 8) | DAC0->DAT[obj->dac].DATL);
group-onsemi 0:098463de4c5d 56 }
group-onsemi 0:098463de4c5d 57
group-onsemi 0:098463de4c5d 58 void analogout_write(dac_t *obj, float value) {
group-onsemi 0:098463de4c5d 59 if (value < 0.0) {
group-onsemi 0:098463de4c5d 60 dac_write(obj, 0);
group-onsemi 0:098463de4c5d 61 } else if (value > 1.0) {
group-onsemi 0:098463de4c5d 62 dac_write(obj, RANGE_12BIT);
group-onsemi 0:098463de4c5d 63 } else {
group-onsemi 0:098463de4c5d 64 dac_write(obj, value * (float)RANGE_12BIT);
group-onsemi 0:098463de4c5d 65 }
group-onsemi 0:098463de4c5d 66 }
group-onsemi 0:098463de4c5d 67
group-onsemi 0:098463de4c5d 68 void analogout_write_u16(dac_t *obj, uint16_t value) {
group-onsemi 0:098463de4c5d 69 dac_write(obj, value >> 4); // 12-bit
group-onsemi 0:098463de4c5d 70 }
group-onsemi 0:098463de4c5d 71
group-onsemi 0:098463de4c5d 72 float analogout_read(dac_t *obj) {
group-onsemi 0:098463de4c5d 73 uint32_t value = dac_read(obj);
group-onsemi 0:098463de4c5d 74 return (float)value * (1.0f / (float)RANGE_12BIT);
group-onsemi 0:098463de4c5d 75 }
group-onsemi 0:098463de4c5d 76
group-onsemi 0:098463de4c5d 77 uint16_t analogout_read_u16(dac_t *obj) {
group-onsemi 0:098463de4c5d 78 uint32_t value = dac_read(obj); // 12-bit
group-onsemi 0:098463de4c5d 79 return (value << 4) | ((value >> 8) & 0x003F);
group-onsemi 0:098463de4c5d 80 }