+++ /dev/null
-/* 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"
-
-void analogout_init(dac_t *obj, PinName pin) {
- MBED_ASSERT(pin == P0_12);
-
- LPC_SYSCON->SYSAHBCLKCTRL0 |= (1 << 29);
- LPC_SYSCON->PDRUNCFG &= ~(1 << 12);
- LPC_IOCON->PIO0_12 = 0;
- LPC_SWM->PINENABLE0 &= ~(1 << 24);
- LPC_DAC->CTRL = 0;
-
- analogout_write_u16(obj, 0);
-}
-
-void analogout_free(dac_t *obj)
-{
- LPC_SYSCON->SYSAHBCLKCTRL0 &= ~(1 << 29);
- LPC_SWM->PINENABLE0 |= (1 << 24);
-}
-
-static inline void dac_write(int value) {
- value &= 0xFFF; // 12-bit
-
- // Set the DAC output
- LPC_DAC->VAL = (value << 4);
-}
-
-static inline int dac_read() {
- return ((LPC_DAC->VAL >> 4) & 0xFFF);
-}
-
-void analogout_write(dac_t *obj, float value) {
- if (value < 0.0f) {
- dac_write(0);
- } else if (value > 1.0f) {
- dac_write(0xFFF);
- } else {
- dac_write((uint32_t)(value * (float)0xFFF));
- }
-}
-
-void analogout_write_u16(dac_t *obj, uint16_t value) {
- dac_write(value);
-}
-
-float analogout_read(dac_t *obj) {
- uint32_t value = dac_read();
- return (float)value * (1.0f / (float)0xFFF);
-}
-
-uint16_t analogout_read_u16(dac_t *obj) {
- return (uint16_t)dac_read();
-}