![]() It is recommended that after power is applied, a command sequence ofģ bytes of 3xh be sent to the module. ![]() Supply does not rise to its correct operating voltage quickly enough. * The data sheets warn that the LCD module may fail to initialise properly when PORTD = 0x00 // PORTD is connected to LCD data pinĭelay10KTCYx(250) // Delay a total of 1 s for LCD module toĭelay10KTCYx(250) // finish its own internal initialisation Void lcd_strobe(void) // Generate the E pulseĭelay1KTCYx(1) // 1ms delay for LCD_EN to settle - Function to generate the strobe signal for command and character. - Function to write a character data to the LCD. PORTD = temp2 & 0x0F // Mask out upper 4 bitsĭelay1KTCYx(10) // 10ms - Delay at least 1 ms before strobing PORTD = temp2 & 0x0F // Output to PORTD which is connected to LCDĭelay1KTCYx(10) // 10ms -Delay at least 1 ms before strobingĭelay1KTCYx(10) // 10ms - Delay at least 1 ms after strobing Temp2 = temp2 > 4 // Output upper 4 bits, by shifting out lower 4 bits LCD_RS = 0 // Select LCD for command modeĭelay10TCYx(4) // 40us delay for LCD to settle down - Function for writing a command byte to the LCD in 4 bit mode. #define KEY_PORT PORTB // RB3 to RB0 has keypad data #define KEY_DA PORTBbits.RB5 // 74922 DA output #define LCD_WR PORTDbits.RD5 // Write on LCD controller #define LCD_EN PORTDbits.RD4 // Enable on LCD controller #define LCD_RS PORTDbits.RD6 // Register Select on LCD Your program declarations start here:= #pragma code _LOW_INTERRUPT_VECTOR = 0x000818 #pragma code _HIGH_INTERRUPT_VECTOR = 0x000808 #pragma code _RESET_INTERRUPT_VECTOR = 0x000800 ![]() Include this when using Bootloader Program =Įxtern void _startup (void) // See c018i.c in your C18 compiler dir My code is given as (PART 1, to initialize LCD keypad, wait for input, etc etc) It's just here if anyone needs to refer to it. Part 1 is to initialize the LCD keypad and wait for user input, which I have no issues with. How do I set the condition for which to activate all of PORTB and PORTC? I am able to get the timer to count down to 00:00:00 but I need an output to happen (buzzer or LED etc.).
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |