Diff: hd44780_8bit.cpp

Revision:

1:65f72ed914fa

Parent:

0:ae5037e3d6e0

Child:

2:5ac5bab7daaf

--- a/hd44780_8bit.cpp	Mon Nov 15 22:37:30 2010 +0000
+++ b/hd44780_8bit.cpp	Tue Nov 16 20:49:18 2010 +0000
@@ -28,7 +28,7 @@
 #include "wait_api.h"
 
 
-void HD44780LCD8bit::writeText(unsigned int line, unsigned int pos, char text[]) {
+void HD44780LCD8bit::writeText(const unsigned int line, const unsigned int pos, const char text[]) {
 //    printf("print to %d,%d {%s}\n",line,pos,text);
     int address=line*0x40+pos;
     sendCmd((unsigned char)address|0x80);
@@ -46,13 +46,13 @@
     sendCmd(1);
 }
 
-void HD44780LCD8bit::sendCmd(unsigned char cmd) {
+void HD44780LCD8bit::sendCmd(const unsigned char cmd) {
     _rs->write(0);
     wait_us(1);
     sendByte(cmd);
 }
 
-void HD44780LCD8bit::sendData(unsigned char cmd) {
+void HD44780LCD8bit::sendData(const unsigned char cmd) {
     _rs->write(1);
     wait_us(1);
     sendByte(cmd);
@@ -77,7 +77,7 @@
     }
 }
 
-void HD44780LCD8bit::sendByte(unsigned char byte) {
+void HD44780LCD8bit::sendByte(const unsigned char byte) {
     _data->write(byte);
     _enable->write(1);
     wait_us(2);