VFD.cpp

00001 #include "mbed.h"
00002 #include <string>
00003 #include "VFD.h"
00004 
00005 VFD::VFD() : _i2c(SDA, SCL) {
00006     _i2c.frequency(100000);
00007 }
00008 
00009 VFD::~VFD() {
00010     //Nothing to see here
00011 }
00012 
00013 void VFD::start() {
00014     _i2c.start();
00015 }
00016 
00017 void VFD::stop() {
00018     _i2c.stop();
00019 }
00020 
00021 int VFD::send_byte(int byte) {
00022     return _i2c.write(byte);
00023 }
00024 
00025 int VFD::read_byte(int ack) {
00026     return _i2c.read(ack);
00027 }
00028 
00029 int VFD::init() {
00030     const char cmd[] = {254,160,0};
00031     int length = 3;
00032     return write(cmd, length);
00033 }
00034 
00035 int VFD::print(string  msg) {
00036     return write(msg.data(), msg.size());
00037 }
00038 
00039 int VFD::autoScrollOn() {
00040     const char cmd[] = {254, 81};
00041     int length = 2;
00042     return write(cmd, length);
00043 }
00044 
00045 int VFD::autoScrollOff() {
00046     const char cmd[] = {254, 82};
00047     int length = 2;
00048     return write(cmd, length);
00049 }
00050 
00051 int VFD::lineWrapOn() {
00052     const char cmd[] = {254, 67};
00053     int length = 2;
00054     return write(cmd, length);
00055 }
00056 
00057 int VFD::lineWrapOff() {
00058     const char cmd[] = {254, 68};
00059     int length = 2;
00060     return write(cmd, length);
00061 }
00062 
00063 int VFD::setCursor(const int col, const int row) {
00064     const char cmd[] = {254, 71, col, row};
00065     int length = 4;
00066     return write(cmd, length);
00067 }
00068 
00069 int VFD::clearScreen() {
00070     const char cmd[] = {254, 88};
00071     int length = 2;
00072     return write(cmd, length);
00073 }
00074 
00075 int VFD::goHome() {
00076     const char cmd[] = {254, 72};
00077     int length = 2;
00078     return write(cmd, length);
00079 }
00080 
00081 int VFD::initLargeNumbers() {
00082     const char cmd[] = {254, 110};
00083     int length = 2;
00084     return write(cmd, length);
00085 }
00086 
00087 int VFD::setBrightness(const int val) {
00088     if (val < 0 || val > 3)
00089         return -1;
00090     const char cmd[] = {254, 89, val};
00091     int length = 3;
00092     return write(cmd, length);
00093 }
00094 
00095 int VFD::write(const char * data, int length) {
00096     int ret = _i2c.write(address, data, length); //Performs a complete write transaction
00097     wait_us(625);
00098     return ret; //Return I2C.write(...) return value
00099 }
00100 
00101 int VFD::read(char * data, int length) {
00102     int ret = _i2c.read(address, data, length); //Performs a complete write transaction
00103     wait_us(625);
00104     return ret; //Return I2C.write(...) return value
00105 }