mbed library sources modified for open wear
Dependents: openwear-lifelogger-example
Fork of mbed-src by
targets/hal/TARGET_Freescale/TARGET_KLXX/analogout_api.c
- Committer:
- janekm
- Date:
- 2014-09-16
- Revision:
- 310:6188e0254baa
- Parent:
- 227:7bd0639b8911
File content as of revision 310:6188e0254baa:
/* mbed Microcontroller Library * Copyright (c) 2006-2013 ARM Limited * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #include "mbed_assert.h" #include "analogout_api.h" #include "cmsis.h" #include "pinmap.h" #include "PeripheralPins.h" #define RANGE_12BIT 0xFFF void analogout_init(dac_t *obj, PinName pin) { obj->dac = (DACName)pinmap_peripheral(pin, PinMap_DAC); MBED_ASSERT(obj->dac != (DACName)NC); SIM->SCGC6 |= SIM_SCGC6_DAC0_MASK; uint32_t port = (uint32_t)pin >> PORT_SHIFT; SIM->SCGC5 |= 1 << (SIM_SCGC5_PORTA_SHIFT + port); DAC0->DAT[obj->dac].DATH = 0; DAC0->DAT[obj->dac].DATL = 0; DAC0->C1 = DAC_C1_DACBFMD_MASK; // One-Time Scan Mode DAC0->C0 = DAC_C0_DACEN_MASK // Enable | DAC_C0_DACSWTRG_MASK; // Software Trigger pinmap_pinout(pin, PinMap_DAC); analogout_write_u16(obj, 0); } void analogout_free(dac_t *obj) {} static inline void dac_write(dac_t *obj, int value) { DAC0->DAT[obj->dac].DATL = (uint8_t)( value & 0xFF); DAC0->DAT[obj->dac].DATH = (uint8_t)((value >> 8) & 0xFF); } static inline int dac_read(dac_t *obj) { return ((DAC0->DAT[obj->dac].DATH << 8) | DAC0->DAT[obj->dac].DATL); } void analogout_write(dac_t *obj, float value) { if (value < 0.0) { dac_write(obj, 0); } else if (value > 1.0) { dac_write(obj, RANGE_12BIT); } else { dac_write(obj, value * (float)RANGE_12BIT); } } void analogout_write_u16(dac_t *obj, uint16_t value) { dac_write(obj, value >> 4); // 12-bit } float analogout_read(dac_t *obj) { uint32_t value = dac_read(obj); return (float)value * (1.0f / (float)RANGE_12BIT); } uint16_t analogout_read_u16(dac_t *obj) { uint32_t value = dac_read(obj); // 12-bit return (value << 4) | ((value >> 8) & 0x003F); }