Mike Pulice / ublox_C200Test

Integrating the ublox LISA C200 modem

Fork of SprintUSBModemHTTPClientTest by Donatien Garnier

mbed-src/targets/hal/TARGET_NXP/TARGET_LPC176X/analogout_api.c@5:3f93dd1d4cb3, 2013-09-26 (annotated)

Committer:
sam_grove
Date:
Thu Sep 26 00:44:20 2013 -0500
Revision:
5:3f93dd1d4cb3
Exported program and replaced contents of the repo with the source

to build and debug using keil mdk. Libs NOT upto date are lwip, lwip-sys

and socket. these have newer versions under mbed_official but were starting

from a know working point

Who changed what in which revision?

UserRevisionLine numberNew contents of line
sam_grove 5:3f93dd1d4cb3 1 /* mbed Microcontroller Library
sam_grove 5:3f93dd1d4cb3 2 * Copyright (c) 2006-2013 ARM Limited
sam_grove 5:3f93dd1d4cb3 3 *
sam_grove 5:3f93dd1d4cb3 4 * Licensed under the Apache License, Version 2.0 (the "License");
sam_grove 5:3f93dd1d4cb3 5 * you may not use this file except in compliance with the License.
sam_grove 5:3f93dd1d4cb3 6 * You may obtain a copy of the License at
sam_grove 5:3f93dd1d4cb3 7 *
sam_grove 5:3f93dd1d4cb3 8 * http://www.apache.org/licenses/LICENSE-2.0
sam_grove 5:3f93dd1d4cb3 9 *
sam_grove 5:3f93dd1d4cb3 10 * Unless required by applicable law or agreed to in writing, software
sam_grove 5:3f93dd1d4cb3 11 * distributed under the License is distributed on an "AS IS" BASIS,
sam_grove 5:3f93dd1d4cb3 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
sam_grove 5:3f93dd1d4cb3 13 * See the License for the specific language governing permissions and
sam_grove 5:3f93dd1d4cb3 14 * limitations under the License.
sam_grove 5:3f93dd1d4cb3 15 */
sam_grove 5:3f93dd1d4cb3 16 #include "analogout_api.h"
sam_grove 5:3f93dd1d4cb3 17
sam_grove 5:3f93dd1d4cb3 18 #include "cmsis.h"
sam_grove 5:3f93dd1d4cb3 19 #include "pinmap.h"
sam_grove 5:3f93dd1d4cb3 20 #include "error.h"
sam_grove 5:3f93dd1d4cb3 21
sam_grove 5:3f93dd1d4cb3 22 static const PinMap PinMap_DAC[] = {
sam_grove 5:3f93dd1d4cb3 23 {P0_26, DAC_0, 2},
sam_grove 5:3f93dd1d4cb3 24 {NC , NC , 0}
sam_grove 5:3f93dd1d4cb3 25 };
sam_grove 5:3f93dd1d4cb3 26
sam_grove 5:3f93dd1d4cb3 27 void analogout_init(dac_t *obj, PinName pin) {
sam_grove 5:3f93dd1d4cb3 28 obj->dac = (DACName)pinmap_peripheral(pin, PinMap_DAC);
sam_grove 5:3f93dd1d4cb3 29 if (obj->dac == (DACName)NC) {
sam_grove 5:3f93dd1d4cb3 30 error("DAC pin mapping failed");
sam_grove 5:3f93dd1d4cb3 31 }
sam_grove 5:3f93dd1d4cb3 32
sam_grove 5:3f93dd1d4cb3 33 // power is on by default, set DAC clk divider is /4
sam_grove 5:3f93dd1d4cb3 34 LPC_SC->PCLKSEL0 &= ~(0x3 << 22);
sam_grove 5:3f93dd1d4cb3 35
sam_grove 5:3f93dd1d4cb3 36 // map out (must be done before accessing registers)
sam_grove 5:3f93dd1d4cb3 37 pinmap_pinout(pin, PinMap_DAC);
sam_grove 5:3f93dd1d4cb3 38
sam_grove 5:3f93dd1d4cb3 39 analogout_write_u16(obj, 0);
sam_grove 5:3f93dd1d4cb3 40 }
sam_grove 5:3f93dd1d4cb3 41
sam_grove 5:3f93dd1d4cb3 42 void analogout_free(dac_t *obj) {}
sam_grove 5:3f93dd1d4cb3 43
sam_grove 5:3f93dd1d4cb3 44 static inline void dac_write(int value) {
sam_grove 5:3f93dd1d4cb3 45 value &= 0x3FF; // 10-bit
sam_grove 5:3f93dd1d4cb3 46
sam_grove 5:3f93dd1d4cb3 47 // Set the DAC output
sam_grove 5:3f93dd1d4cb3 48 LPC_DAC->DACR = (0 << 16) // bias = 0
sam_grove 5:3f93dd1d4cb3 49 | (value << 6);
sam_grove 5:3f93dd1d4cb3 50 }
sam_grove 5:3f93dd1d4cb3 51
sam_grove 5:3f93dd1d4cb3 52 static inline int dac_read() {
sam_grove 5:3f93dd1d4cb3 53 return (LPC_DAC->DACR >> 6) & 0x3FF;
sam_grove 5:3f93dd1d4cb3 54 }
sam_grove 5:3f93dd1d4cb3 55
sam_grove 5:3f93dd1d4cb3 56 void analogout_write(dac_t *obj, float value) {
sam_grove 5:3f93dd1d4cb3 57 if (value < 0.0f) {
sam_grove 5:3f93dd1d4cb3 58 dac_write(0);
sam_grove 5:3f93dd1d4cb3 59 } else if (value > 1.0f) {
sam_grove 5:3f93dd1d4cb3 60 dac_write(0x3FF);
sam_grove 5:3f93dd1d4cb3 61 } else {
sam_grove 5:3f93dd1d4cb3 62 dac_write(value * (float)0x3FF);
sam_grove 5:3f93dd1d4cb3 63 }
sam_grove 5:3f93dd1d4cb3 64 }
sam_grove 5:3f93dd1d4cb3 65
sam_grove 5:3f93dd1d4cb3 66 void analogout_write_u16(dac_t *obj, uint16_t value) {
sam_grove 5:3f93dd1d4cb3 67 dac_write(value >> 6); // 10-bit
sam_grove 5:3f93dd1d4cb3 68 }
sam_grove 5:3f93dd1d4cb3 69
sam_grove 5:3f93dd1d4cb3 70 float analogout_read(dac_t *obj) {
sam_grove 5:3f93dd1d4cb3 71 uint32_t value = dac_read();
sam_grove 5:3f93dd1d4cb3 72 return (float)value * (1.0f / (float)0x3FF);
sam_grove 5:3f93dd1d4cb3 73 }
sam_grove 5:3f93dd1d4cb3 74
sam_grove 5:3f93dd1d4cb3 75 uint16_t analogout_read_u16(dac_t *obj) {
sam_grove 5:3f93dd1d4cb3 76 uint32_t value = dac_read(); // 10-bit
sam_grove 5:3f93dd1d4cb3 77 return (value << 6) | ((value >> 4) & 0x003F);
sam_grove 5:3f93dd1d4cb3 78 }