Clark,

Right after initializing the IIC bus I run the following commands:

void setup_screen(void)
{
iic_start(WDisplay);
iic_transmit(0xFE); // Turn autoscroll off
iic_transmit(0x52); // Turn autoscroll off
iic_transmit(0xFE); // Turn autotransmit key off
iic_transmit(0x4F); // Turn autotransmit ...

Hi all,

I am using an LK204 with a 4x4 keypad interfaced with a freescale MC9S12. For ease of use I am using the IIC bus to communicate between the controller and the screen. I have observed some strange behavior between the screen and the controller. When one repeatedly writes to the display and ...