An I2C text LCD library for Displaytronic ACM1602NI-FLW-FBW-M01 MOD by Zak
Fork of ACM1602NI by
Diff: ACM1602NI.cpp
- Revision:
- 0:aac87cbfc229
- Child:
- 1:84527dcd3fcc
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/ACM1602NI.cpp Mon May 13 12:50:42 2013 +0000 @@ -0,0 +1,99 @@ +#include "mbed.h" +#include "ACM1602NI.h" + +#define _i2cSUCCESS 0 +#define _i2cFAILURE 1 + +ACM1602NI::ACM1602NI(I2C &i2c): _i2c(i2c) { + init(); +} + +void ACM1602NI::init() { + writeCommand(0x01); + wait_ms(i2c_command_wait_ms); + writeCommand(0x38); + wait_ms(i2c_command_wait_ms); + writeCommand(0x0f); + wait_ms(i2c_command_wait_ms); + writeCommand(0x06); + wait_ms(i2c_command_wait_ms); + locate(0, 0); +} + +int ACM1602NI::writeBytes(const char *data, int length, bool repeated) { + wait_us(i2c_bit_wait_us); + _i2c.start(); + for (int i = 0; i < length; i++) { + wait_us(i2c_bit_wait_us); + if (_i2c.write(data[i]) != 1) { + wait_us(i2c_bit_wait_us); + _i2c.stop(); + return _i2cFAILURE; + } + } + if (!repeated) { + wait_us(i2c_bit_wait_us); + _i2c.stop(); + } + return _i2cSUCCESS; +} + +void ACM1602NI::character(int column, int row, int c) { + int a = address(column, row); + writeCommand(a); + writeData(c); +} + +void ACM1602NI::cls() { + writeCommand(0x01); + wait_ms(i2c_command_wait_ms); + locate(0, 0); +} + +void ACM1602NI::locate(int column, int row) { + _column = column; + _row = row; +} + +int ACM1602NI::_putc(int value) { + if (value == '\n') { + _column = 0; + _row = (_row + 1) % rows(); + } + else { + character(_column, _row, value); + _column++; + if (_column >= columns()) { + _column = 0; + _row = (_row + 1) % rows(); + } + } + return value; +} + +int ACM1602NI::_getc() { + return -1; +} + +void ACM1602NI::writeCommand(int command) { + char bs[3] = { i2c_addr, 0x00, command }; + writeBytes(bs, 3); +} + +void ACM1602NI::writeData(int data) { + char bs[3] = { i2c_addr, 0x80, data }; + writeBytes(bs, 3); +} + +int ACM1602NI::address(int column, int row) { + return 0x80 + row * 0x40 + column; +} + +int ACM1602NI::columns() { + return display_columns; +} + +int ACM1602NI::rows() { + return display_rows; +} +