easytronic
/
I2CTextLCD
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Dependencies: mbed
Fork of
I2CTextLCD
by 
Romilly Cocking
Revision 3:846b36e1f4d5, committed 2016-01-19
- Comitter:
- mijimy
- Date:
- Tue Jan 19 07:50:15 2016 +0000
- Parent:
- 2:628a00fec43c
- Commit message:
- i2c pcf8574t lcd 20x4 .. remove crash after certain cycle
Changed in this revision
| i2clcd/TextLCD.cpp | Show annotated file Show diff for this revision Revisions of this file |
| main.cpp | Show annotated file Show diff for this revision Revisions of this file |
--- a/i2clcd/TextLCD.cpp Mon Jan 18 04:02:04 2016 +0000
+++ b/i2clcd/TextLCD.cpp Tue Jan 19 07:50:15 2016 +0000
@@ -52,8 +52,9 @@
#include "mbed.h"
-TextLCD::TextLCD(PinName sda, PinName scl, int i2cAddress, LCDType type) : _i2c(sda, scl), _type(type) {
- _i2cAddress = i2cAddress;
+TextLCD::TextLCD(PinName sda, PinName scl, int i2cAddress, LCDType type) : _i2c(sda, scl), _i2cAddress(i2cAddress) , _type(type){
+ // _i2cAddress = i2cAddress;
+ writeByte(E_ON,false);
wait(0.015); // Wait 15ms to ensure powered up
// send "Display Settings" 3 times (Only top nibble of 0x30 as we've got 4-bit bus)
@@ -114,7 +115,7 @@
void TextLCD::writeI2CByte(int data) {
// equivalent to writeI2CByte
- char * cmd = new char[1];
+ char cmd[1];
cmd[0] = data;
_i2c.write(_i2cAddress, cmd, 1);
}
@@ -128,9 +129,11 @@
data |= E_ON; // E on
writeI2CByte(data);
data ^= E_ON; // E off
- wait_us(1);
+ //wait_us(1);
+ wait(0.000001f); // most instructions take 40us
writeI2CByte(data);
- wait_us(1000);
+ wait(0.001f); // most instructions take 40us
+ // wait_us(1000);
}
void TextLCD::writeByte(int data, bool rs) {
--- a/main.cpp Mon Jan 18 04:02:04 2016 +0000
+++ b/main.cpp Tue Jan 19 07:50:15 2016 +0000
@@ -11,7 +11,7 @@
lcd.locate(4,2);
lcd.printf("count:");
while(1)
- { for(count=0;count<21;count+=1)
+ { for(count=0;count<100;count+=1)
{ lcd.locate(11,2);
lcd.printf(" %d ",count);
wait(0.5);