Diff: vendor/NXP/LPC4088/hal/analogout_api.c

Revision:

13:0645d8841f51

Parent:

12:5fa2273de5db

Child:

14:096882eb0961

diff -r 5fa2273de5db -r 0645d8841f51 vendor/NXP/LPC4088/hal/analogout_api.c
--- a/vendor/NXP/LPC4088/hal/analogout_api.c	Wed Jul 24 11:11:21 2013 +0100
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,77 +0,0 @@
-/* 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"
-
-static const PinMap PinMap_DAC[] = {
-    {P0_26, DAC_0, 2},
-    {NC   , NC   , 0}
-};
-
-void analogout_init(dac_t *obj, PinName pin) {
-    obj->dac = (DACName)pinmap_peripheral(pin, PinMap_DAC);
-    if (obj->dac == (uint32_t)NC) {
-        error("DAC pin mapping failed");
-    }
-    
-    // DAC enable bit must be set
-    LPC_IOCON->P0_26 |= (1 << 16); // DACEN
-    
-    // map out (must be done before accessing registers)
-    pinmap_pinout(pin, PinMap_DAC);
-    
-    analogout_write_u16(obj, 0);
-}
-
-void analogout_free(dac_t *obj) {}
-
-static inline void dac_write(int value) {
-    value &= 0x3FF; // 10-bit
-    
-    // Set the DAC output
-    LPC_DAC->CR = (0 << 16)       // bias = 0
-                | (value << 6);
-}
-
-static inline int dac_read() {
-    return (LPC_DAC->CR >> 6) & 0x3FF;
-}
-
-void analogout_write(dac_t *obj, float value) {
-    if (value < 0.0f) {
-        dac_write(0);
-    } else if (value > 1.0f) {
-        dac_write(0x3FF);
-    } else {
-        dac_write(value * (float)0x3FF);
-    }
-}
-
-void analogout_write_u16(dac_t *obj, uint16_t value) {
-    dac_write(value >> 6); // 10-bit
-}
-
-float analogout_read(dac_t *obj) {
-    uint32_t value = dac_read();
-    return (float)value * (1.0f / (float)0x3FF);
-}
-
-uint16_t analogout_read_u16(dac_t *obj) {
-    uint32_t value = dac_read(); // 10-bit
-    return (value << 6) | ((value >> 4) & 0x003F);
-}