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Fixing RW pin bug in LiquidCrystal library. Now using 255 to disable pin instead of -1.

This commit is contained in:
David A. Mellis 2009-12-18 16:36:45 +00:00
parent 76f7c447b9
commit 07a5160f3b
1 changed files with 6 additions and 6 deletions
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12
libraries/LiquidCrystal/LiquidCrystal.cpp
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@ -35,7 +35,7 @@ LiquidCrystal::LiquidCrystal(uint8_t rs, uint8_t enable,
uint8_t d0, uint8_t d1, uint8_t d2, uint8_t d3,
uint8_t d4, uint8_t d5, uint8_t d6, uint8_t d7)
{
init(0, rs, -1, enable, d0, d1, d2, d3, d4, d5, d6, d7);
init(0, rs, 255, enable, d0, d1, d2, d3, d4, d5, d6, d7);
}
LiquidCrystal::LiquidCrystal(uint8_t rs, uint8_t rw, uint8_t enable,
@ -47,7 +47,7 @@ LiquidCrystal::LiquidCrystal(uint8_t rs, uint8_t rw, uint8_t enable,
LiquidCrystal::LiquidCrystal(uint8_t rs, uint8_t enable,
uint8_t d0, uint8_t d1, uint8_t d2, uint8_t d3)
{
init(1, rs, -1, enable, d0, d1, d2, d3, 0, 0, 0, 0);
init(1, rs, 255, enable, d0, d1, d2, d3, 0, 0, 0, 0);
}
void LiquidCrystal::init(uint8_t fourbitmode, uint8_t rs, uint8_t rw, uint8_t enable,
@ -68,8 +68,8 @@ void LiquidCrystal::init(uint8_t fourbitmode, uint8_t rs, uint8_t rw, uint8_t en
_data_pins[7] = d7;
pinMode(_rs_pin, OUTPUT);
// we can save 1 pin by not using RW. Indicate by passing -1 instead of pin#
if (_rw_pin != -1) {
// we can save 1 pin by not using RW. Indicate by passing 255 instead of pin#
if (_rw_pin != 255) {
pinMode(_rw_pin, OUTPUT);
}
pinMode(_enable_pin, OUTPUT);
@ -101,7 +101,7 @@ void LiquidCrystal::begin(uint8_t cols, uint8_t lines, uint8_t dotsize) {
// Now we pull both RS and R/W low to begin commands
digitalWrite(_rs_pin, LOW);
digitalWrite(_enable_pin, LOW);
if (_rw_pin != -1) {
if (_rw_pin != 255) {
digitalWrite(_rw_pin, LOW);
}
@ -269,7 +269,7 @@ void LiquidCrystal::send(uint8_t value, uint8_t mode) {
digitalWrite(_rs_pin, mode);
// if there is a RW pin indicated, set it low to Write
if (_rw_pin != -1) {
if (_rw_pin != 255) {
digitalWrite(_rw_pin, LOW);
}