Will Salisbury / VFD

Library for Matrix Orbital VFD2041 display. Also useable for LCD2041 modules.

VFD.cpp@4:f17ce5ab5d01, 2012-04-08 (annotated)

Committer:
wsalis01
Date:
Sun Apr 08 20:27:22 2012 +0000
Revision:
4:f17ce5ab5d01
Parent:
3:b96f8fff00e8 
First Commit.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
wsalis01 0:f0e9065504cd 1 #include "mbed.h"
wsalis01 0:f0e9065504cd 2 #include <string>
wsalis01 0:f0e9065504cd 3 #include "VFD.h"
wsalis01 0:f0e9065504cd 4
wsalis01 0:f0e9065504cd 5 VFD::VFD() : _i2c(SDA, SCL) {
wsalis01 4:f17ce5ab5d01 6 _i2c.frequency(100000);
wsalis01 3:b96f8fff00e8 7 }
wsalis01 3:b96f8fff00e8 8
wsalis01 0:f0e9065504cd 9 VFD::~VFD() {
wsalis01 0:f0e9065504cd 10 //Nothing to see here
wsalis01 0:f0e9065504cd 11 }
wsalis01 0:f0e9065504cd 12
wsalis01 4:f17ce5ab5d01 13 void VFD::start() {
wsalis01 4:f17ce5ab5d01 14 _i2c.start();
wsalis01 4:f17ce5ab5d01 15 }
wsalis01 4:f17ce5ab5d01 16
wsalis01 4:f17ce5ab5d01 17 void VFD::stop() {
wsalis01 4:f17ce5ab5d01 18 _i2c.stop();
wsalis01 4:f17ce5ab5d01 19 }
wsalis01 4:f17ce5ab5d01 20
wsalis01 4:f17ce5ab5d01 21 int VFD::send_byte(int byte) {
wsalis01 4:f17ce5ab5d01 22 return _i2c.write(byte);
wsalis01 4:f17ce5ab5d01 23 }
wsalis01 4:f17ce5ab5d01 24
wsalis01 4:f17ce5ab5d01 25 int VFD::read_byte(int ack) {
wsalis01 4:f17ce5ab5d01 26 return _i2c.read(ack);
wsalis01 4:f17ce5ab5d01 27 }
wsalis01 4:f17ce5ab5d01 28
wsalis01 0:f0e9065504cd 29 int VFD::init() {
wsalis01 0:f0e9065504cd 30 const char cmd[] = {254,160,0};
wsalis01 0:f0e9065504cd 31 int length = 3;
wsalis01 0:f0e9065504cd 32 return write(cmd, length);
wsalis01 0:f0e9065504cd 33 }
wsalis01 0:f0e9065504cd 34
wsalis01 4:f17ce5ab5d01 35 int VFD::print(string msg) {
wsalis01 2:b170a67a8dae 36 return write(msg.data(), msg.size());
wsalis01 0:f0e9065504cd 37 }
wsalis01 0:f0e9065504cd 38
wsalis01 0:f0e9065504cd 39 int VFD::autoScrollOn() {
wsalis01 0:f0e9065504cd 40 const char cmd[] = {254, 81};
wsalis01 0:f0e9065504cd 41 int length = 2;
wsalis01 0:f0e9065504cd 42 return write(cmd, length);
wsalis01 0:f0e9065504cd 43 }
wsalis01 0:f0e9065504cd 44
wsalis01 0:f0e9065504cd 45 int VFD::autoScrollOff() {
wsalis01 0:f0e9065504cd 46 const char cmd[] = {254, 82};
wsalis01 0:f0e9065504cd 47 int length = 2;
wsalis01 0:f0e9065504cd 48 return write(cmd, length);
wsalis01 0:f0e9065504cd 49 }
wsalis01 0:f0e9065504cd 50
wsalis01 0:f0e9065504cd 51 int VFD::lineWrapOn() {
wsalis01 0:f0e9065504cd 52 const char cmd[] = {254, 67};
wsalis01 0:f0e9065504cd 53 int length = 2;
wsalis01 0:f0e9065504cd 54 return write(cmd, length);
wsalis01 0:f0e9065504cd 55 }
wsalis01 0:f0e9065504cd 56
wsalis01 0:f0e9065504cd 57 int VFD::lineWrapOff() {
wsalis01 0:f0e9065504cd 58 const char cmd[] = {254, 68};
wsalis01 0:f0e9065504cd 59 int length = 2;
wsalis01 0:f0e9065504cd 60 return write(cmd, length);
wsalis01 0:f0e9065504cd 61 }
wsalis01 0:f0e9065504cd 62
wsalis01 0:f0e9065504cd 63 int VFD::setCursor(const int col, const int row) {
wsalis01 0:f0e9065504cd 64 const char cmd[] = {254, 71, col, row};
wsalis01 0:f0e9065504cd 65 int length = 4;
wsalis01 0:f0e9065504cd 66 return write(cmd, length);
wsalis01 0:f0e9065504cd 67 }
wsalis01 0:f0e9065504cd 68
wsalis01 0:f0e9065504cd 69 int VFD::clearScreen() {
wsalis01 0:f0e9065504cd 70 const char cmd[] = {254, 88};
wsalis01 0:f0e9065504cd 71 int length = 2;
wsalis01 0:f0e9065504cd 72 return write(cmd, length);
wsalis01 0:f0e9065504cd 73 }
wsalis01 0:f0e9065504cd 74
wsalis01 0:f0e9065504cd 75 int VFD::goHome() {
wsalis01 0:f0e9065504cd 76 const char cmd[] = {254, 72};
wsalis01 0:f0e9065504cd 77 int length = 2;
wsalis01 0:f0e9065504cd 78 return write(cmd, length);
wsalis01 0:f0e9065504cd 79 }
wsalis01 0:f0e9065504cd 80
wsalis01 0:f0e9065504cd 81 int VFD::initLargeNumbers() {
wsalis01 0:f0e9065504cd 82 const char cmd[] = {254, 110};
wsalis01 0:f0e9065504cd 83 int length = 2;
wsalis01 0:f0e9065504cd 84 return write(cmd, length);
wsalis01 0:f0e9065504cd 85 }
wsalis01 0:f0e9065504cd 86
wsalis01 0:f0e9065504cd 87 int VFD::setBrightness(const int val) {
wsalis01 0:f0e9065504cd 88 if (val < 0 || val > 3)
wsalis01 0:f0e9065504cd 89 return -1;
wsalis01 0:f0e9065504cd 90 const char cmd[] = {254, 89, val};
wsalis01 0:f0e9065504cd 91 int length = 3;
wsalis01 0:f0e9065504cd 92 return write(cmd, length);
wsalis01 0:f0e9065504cd 93 }
wsalis01 0:f0e9065504cd 94
wsalis01 0:f0e9065504cd 95 int VFD::write(const char * data, int length) {
wsalis01 4:f17ce5ab5d01 96 int ret = _i2c.write(address, data, length); //Performs a complete write transaction
wsalis01 0:f0e9065504cd 97 wait_us(625);
wsalis01 0:f0e9065504cd 98 return ret; //Return I2C.write(...) return value
wsalis01 0:f0e9065504cd 99 }
wsalis01 0:f0e9065504cd 100
wsalis01 0:f0e9065504cd 101 int VFD::read(char * data, int length) {
wsalis01 4:f17ce5ab5d01 102 int ret = _i2c.read(address, data, length); //Performs a complete write transaction
wsalis01 0:f0e9065504cd 103 wait_us(625);
wsalis01 0:f0e9065504cd 104 return ret; //Return I2C.write(...) return value
wsalis01 0:f0e9065504cd 105 }