Mike Pulice / ublox_C200Test

Integrating the ublox LISA C200 modem

Fork of SprintUSBModemHTTPClientTest by Donatien Garnier

mbed-src/common/I2C.cpp@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 "I2C.h"
sam_grove 5:3f93dd1d4cb3 17
sam_grove 5:3f93dd1d4cb3 18 #if DEVICE_I2C
sam_grove 5:3f93dd1d4cb3 19
sam_grove 5:3f93dd1d4cb3 20 namespace mbed {
sam_grove 5:3f93dd1d4cb3 21
sam_grove 5:3f93dd1d4cb3 22 I2C *I2C::_owner = NULL;
sam_grove 5:3f93dd1d4cb3 23
sam_grove 5:3f93dd1d4cb3 24 I2C::I2C(PinName sda, PinName scl) {
sam_grove 5:3f93dd1d4cb3 25 // The init function also set the frequency to 100000
sam_grove 5:3f93dd1d4cb3 26 i2c_init(&_i2c, sda, scl);
sam_grove 5:3f93dd1d4cb3 27 _hz = 100000;
sam_grove 5:3f93dd1d4cb3 28
sam_grove 5:3f93dd1d4cb3 29 // Used to avoid unnecessary frequency updates
sam_grove 5:3f93dd1d4cb3 30 _owner = this;
sam_grove 5:3f93dd1d4cb3 31 }
sam_grove 5:3f93dd1d4cb3 32
sam_grove 5:3f93dd1d4cb3 33 void I2C::frequency(int hz) {
sam_grove 5:3f93dd1d4cb3 34 _hz = hz;
sam_grove 5:3f93dd1d4cb3 35
sam_grove 5:3f93dd1d4cb3 36 // We want to update the frequency even if we are already the bus owners
sam_grove 5:3f93dd1d4cb3 37 i2c_frequency(&_i2c, _hz);
sam_grove 5:3f93dd1d4cb3 38
sam_grove 5:3f93dd1d4cb3 39 // Updating the frequency of the bus we become the owners of it
sam_grove 5:3f93dd1d4cb3 40 _owner = this;
sam_grove 5:3f93dd1d4cb3 41 }
sam_grove 5:3f93dd1d4cb3 42
sam_grove 5:3f93dd1d4cb3 43 void I2C::aquire() {
sam_grove 5:3f93dd1d4cb3 44 if (_owner != this) {
sam_grove 5:3f93dd1d4cb3 45 i2c_frequency(&_i2c, _hz);
sam_grove 5:3f93dd1d4cb3 46 _owner = this;
sam_grove 5:3f93dd1d4cb3 47 }
sam_grove 5:3f93dd1d4cb3 48 }
sam_grove 5:3f93dd1d4cb3 49
sam_grove 5:3f93dd1d4cb3 50 // write - Master Transmitter Mode
sam_grove 5:3f93dd1d4cb3 51 int I2C::write(int address, const char* data, int length, bool repeated) {
sam_grove 5:3f93dd1d4cb3 52 aquire();
sam_grove 5:3f93dd1d4cb3 53
sam_grove 5:3f93dd1d4cb3 54 int stop = (repeated) ? 0 : 1;
sam_grove 5:3f93dd1d4cb3 55 int written = i2c_write(&_i2c, address, data, length, stop);
sam_grove 5:3f93dd1d4cb3 56
sam_grove 5:3f93dd1d4cb3 57 return length != written;
sam_grove 5:3f93dd1d4cb3 58 }
sam_grove 5:3f93dd1d4cb3 59
sam_grove 5:3f93dd1d4cb3 60 int I2C::write(int data) {
sam_grove 5:3f93dd1d4cb3 61 return i2c_byte_write(&_i2c, data);
sam_grove 5:3f93dd1d4cb3 62 }
sam_grove 5:3f93dd1d4cb3 63
sam_grove 5:3f93dd1d4cb3 64 // read - Master Reciever Mode
sam_grove 5:3f93dd1d4cb3 65 int I2C::read(int address, char* data, int length, bool repeated) {
sam_grove 5:3f93dd1d4cb3 66 aquire();
sam_grove 5:3f93dd1d4cb3 67
sam_grove 5:3f93dd1d4cb3 68 int stop = (repeated) ? 0 : 1;
sam_grove 5:3f93dd1d4cb3 69 int read = i2c_read(&_i2c, address, data, length, stop);
sam_grove 5:3f93dd1d4cb3 70
sam_grove 5:3f93dd1d4cb3 71 return length != read;
sam_grove 5:3f93dd1d4cb3 72 }
sam_grove 5:3f93dd1d4cb3 73
sam_grove 5:3f93dd1d4cb3 74 int I2C::read(int ack) {
sam_grove 5:3f93dd1d4cb3 75 if (ack) {
sam_grove 5:3f93dd1d4cb3 76 return i2c_byte_read(&_i2c, 0);
sam_grove 5:3f93dd1d4cb3 77 } else {
sam_grove 5:3f93dd1d4cb3 78 return i2c_byte_read(&_i2c, 1);
sam_grove 5:3f93dd1d4cb3 79 }
sam_grove 5:3f93dd1d4cb3 80 }
sam_grove 5:3f93dd1d4cb3 81
sam_grove 5:3f93dd1d4cb3 82 void I2C::start(void) {
sam_grove 5:3f93dd1d4cb3 83 i2c_start(&_i2c);
sam_grove 5:3f93dd1d4cb3 84 }
sam_grove 5:3f93dd1d4cb3 85
sam_grove 5:3f93dd1d4cb3 86 void I2C::stop(void) {
sam_grove 5:3f93dd1d4cb3 87 i2c_stop(&_i2c);
sam_grove 5:3f93dd1d4cb3 88 }
sam_grove 5:3f93dd1d4cb3 89
sam_grove 5:3f93dd1d4cb3 90 } // namespace mbed
sam_grove 5:3f93dd1d4cb3 91
sam_grove 5:3f93dd1d4cb3 92 #endif