mbed library sources
Dependents: frdm_kl05z_gpio_test
Fork of mbed-src by
targets/hal/TARGET_Freescale/TARGET_KPSDK_MCUS/TARGET_K64F/analogout_api.c
- Committer:
- mbed_official
- Date:
- 2014-07-08
- Revision:
- 251:de9a1e4ffd79
- Parent:
- 250:a49055e7a707
- Child:
- 265:9632ea190e16
File content as of revision 251:de9a1e4ffd79:
/* 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 "analogout_api.h" #include "cmsis.h" #include "pinmap.h" #include "error.h" #define RANGE_12BIT 0xFFF const PinMap PinMap_DAC[] = { {DAC0_OUT, DAC_0, 0}, {NC , NC , 0} }; void analogout_init(dac_t *obj, PinName pin) { obj->dac = (DACName)pinmap_peripheral(pin, PinMap_DAC); if (obj->dac == (DACName)NC) { error("DAC pin mapping failed"); } SIM->SCGC2 |= SIM_SCGC2_DAC0_MASK; DAC0->DAT[obj->dac].DATH = 0; DAC0->DAT[obj->dac].DATL = 0; DAC0->C1 = DAC_C1_DACBFMD(2); // One-Time Scan Mode DAC0->C0 = DAC_C0_DACEN_MASK // Enable | DAC_C0_DACSWTRG_MASK // Software Trigger | DAC_C0_DACRFS_MASK; // VDDA selected 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 < 0.0f) { dac_write(obj, 0); } else if (value > 1.0f) { 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); }