PCF8574 source code

Does anybody have working example of driving PCF8574A for at89c2051? I'm trying to blink a LED almous about 6 hours with a zero result... :-( SDATA on P1_6, SCLK on P1_7 how to turn on/off LED...
PCF8574 source code

Does anybody have working example of driving PCF8574A for at89c2051? I'm trying to blink a LED almous about 6 hours with a zero result... :-( SDATA on P1_6, SCLK on P1_7 how to turn on/off LED...
LPC2114 interfacing with PCF8574

Hi, I am facing problem with LPC2114 inbuilt I2C, i interfaced LPC2114 with PCF8574AP Port Expander. I have tested following code but the salve device (PCF8574AP)is not responding. My application...
LPC2114 interfacing with PCF8574

Hi, I am facing problem with LPC2114 inbuilt I2C, i interfaced LPC2114 with PCF8574AP Port Expander. I have tested following code but the salve device (PCF8574AP)is not responding. My application...