Some simple code interfacing an arduino uno and an 1602 lcd display.
So far you can:
- initialize the display in 4-bit mode with
void lcd_init(void) - print a single char or a string on the display with
void lcd_putc(const char c)|void lcd_puts(const char *s) - the latter function manages the case if the string is longer than 16 bytes and add spaces so the rest of the string appears on the second line
- set and reset the enable pin with
void strobe(void) - send any byte of data with
void send_byte(byte c)
I'm sure there are a lot of issues as I only briefly worked on this, but feel free if you have any suggestions.
In the folder you will find a file called lcd_controller.fzz, it can be opened using the free fritzing software available here.
The red leds display the bits sent to RS / RW / E and the green display the bits sent to the data pins D4 - D7. It makes visible what's going on with the display and it's easier to debug.
