Interfacing Nokia 5110 LCD with MSP430

akhtar 10 April 2017, 21:09

i run this code in ccs but it shows font is undefined error ,what is the solution for this

Luan 11 April 2017, 13:28

You need to download the file font_table.h from github too. And put in same folder.

akhtar 11 April 2017, 20:03

hello luan
error is solved, but still i cant get output ,what is issue ?i think itspinmuxing problem?what is the issue ?why the output will not come?
thanks and regards
akhtar

akhtar 11 April 2017, 23:13

and also u r not define any spi pin how data is write in to the lcd (how clock and data are sink)..i m not getting any output.// LCD Nokia 5110 Interface

#include <msp430.h>
#include “font_table.h”

#define RST BIT0
#define CE BIT1
#define DC BIT2
#define DIN BIT7
#define CLK BIT5
#define BL BIT3

void spi_init(void)
{ // set the pin mode 3 for pins 5,6 & 7 of port 1 (USCI mode) P1SEL |= BIT5 + BIT7; // low bit = 1 for pins 5,6 and 7 BIT 3 is 0 (CS via GPIO) P1SEL2 |= BIT5 + BIT7; // high bit = 1 for pins 5,6 and 7 BIT 3 is 0 (CS via GPIO)

//P1DIR |= BIT4; // p1.4 set to output to drive CS //P1OUT |= BIT4; // pull p1.4 to high – CS high -> chip is disabled

UCB0CTL1 = UCSWRST;

UCB0CTL0 |= UCCKPH | UCMST | UCSYNC | UCMSB | UCMODE_0; // synchronous (=SPI) master 3 wire SPI, clock polarity Low at idle // SPI mode 0

UCB0CTL1 |= UCSSEL_2; //use SCLK : 4MHz

UCB0BR0 = 0×04; // set baud rate = SMCLK, divide by 4, SPI Clock Freq : 1 MHz UCB0BR1 = 0; UCB0CTL1 &= ~UCSWRST; // ** Initialize USCI **
}
void delay_us(unsigned int us)
{ while (us) { // 1 for 1 Mhz set 16 for 16 MHz __delay_cycles(1); us—; }
}

void delay_ms(unsigned int ms)
{ while (ms) { // 1000 for 1MHz and 16000 for 16MHz __delay_cycles(1000); ms—; }
}

void configure_clocks()
{ // Stop watchdog WDTCTL = WDTPW + WDTHOLD; BCSCTL1 = CALBC1_1MHZ; DCOCTL = CALDCO_1MHZ;
}

void send_byte(unsigned char byte)
{ unsigned char i; for (i = 0; i < 8; i++) { P1OUT &= (0xFF & ~CLK); if (byte > 127) { P1OUT |= DIN; } else { P1OUT &= (0xFF & ~DIN); }

delay_us(1); // rise clock P1OUT |= (CLK); // shift byte byte = byte << 1; } P1OUT &= (0xFF & ~CLK); }

void send_data(unsigned char data)
{ P1OUT |= DC; send_byte(data);
}

void send_command(unsigned char cmd)
{ P1OUT &= (0xFF & ~DC); send_byte(cmd);
}

void init_lcd()
{ //P1SEL |=BIT2; //P1SEL2 |=BIT2; P1DIR |= RST | CE | DC | DIN | CLK | BL;

P1OUT = RST | CE | DC | ~DIN | ~CLK | ~BL; delay_ms(50); // reset the controller P1OUT &= (0xFF & ~RST); delay_us(1); P1OUT |= (RST); // start P1OUT &= (0xFF & ~CE); send_command(0×21); send_command(0×09); send_command(0×99); // set LCD Vop (contrast) //send_command(0×04); //set temp coefficient //send_command(0×14); //set bias 1:48 send_command(0×20); // LCD basic commands send_command(0×0C); //lcd in normal mode // turn on backlight P1OUT |= (BL); }

void clear_display()
{ unsigned short i; for(i = 0; i < 504; i++) { send_data(0×00); }
}

void set_cursor(unsigned char x, unsigned char y)
{ unsigned char x_addr = 0×80 | x; unsigned char y_addr = 0×40 | y; send_command(0×20); send_command(x_addr); send_command(y_addr);
}

void print_char(char c)
{ unsigned char i; for (i = 0; i < 5; i++) { send_data(font[c – 0×20][i]); } send_data(0×00);
}

void print_string(char *str)
{ while(*str) { print_char(*str); str++; }
}

void main(void)
{ //configure the clock frequency

configure_clocks(); spi_init();

// init lcd init_lcd(); // clear the display clear_display(); set_cursor(0, 2); print_string(“AKHTAR”); P1OUT |= CE; while (1) { } } just see my code still i m not getting any output ,whats the problem

akhtar 12 April 2017, 01:09

i m using UCB0TXBUF in set_byte function ,still it will not working
send_byte()
{

UCB0TXBUF = byte; while (!( IFG2 & UCB0TXIFG));
}

pankaj kyada 14 April 2017, 08:20

my code is not getting lcd output

#include <.h>
#include “font_lut.h”
#include “types.h”

#define RST BIT0
#define DC BIT1
#define BL BIT2
#define CE BIT3
#define DIN BIT7
#define CLK BIT5

void delay_us(unsigned int us)
{ while (us) { // 1 for 1 Mhz set 16 for 16 MHz __delay_cycles(1); us—; }
}

void delay_ms(unsigned int ms)
{ while (ms) { // 1000 for 1MHz and 16000 for 16MHz __delay_cycles(1000); ms—; }
}

void glcd_clk_init(void)
{ BCSCTL1 = CALBC1_1MHZ; DCOCTL = CALDCO_1MHZ;
}

void glcd_write(u8 lcd_char)
{ P1OUT |= CE; // Enable Device.. P1OUT &= ~CE; // Disable Device… //__delay_cycles(1000);

while((UCB0STAT & UCBUSY)); // USCI_B0 TX buffer ready… //while (!(IFG2 & UCB0TXIFG)); UCB0TXBUF = lcd_char; //__delay_cycles(1000); P1OUT |= CE; __delay_cycles(1000); }

void glcd_cmd(u8 cmd)
{ P1OUT &= ~DC; glcd_write(cmd);
}

void glcd_init(void)
{ P1DIR |= RST + DC + BL + CE; P1OUT |= RST + DC + ~BL + CE;

P1SEL = DIN + CLK; P1SEL2 = DIN + CLK; delay_ms(50); // reset the controller P1OUT &= ~RST; delay_us(1); P1OUT |= RST; // start P1OUT &= ~CE; glcd_cmd(0×21); glcd_cmd(0×99); // set LCD Vop (contrast) glcd_cmd(0×20); // LCD basic commands glcd_cmd(0×0C); // turn on backlight P1OUT |= BL; }

void glcd_spi_init(void)
{ /* USCI SPI_B0 is used */ /* P1SEL = DIN | CLK; P1SEL2 = DIN | CLK;*/

UCB0CTL1 |= UCSWRST; // Software reset enable,Enabled USCI logic held in reset state… UCB0CTL0 |= UCCKPH + UCMSB + UCMST + UCSYNC; // Clock phase select,MSB 1st,3-pin, 8-bit SPI master,Master mode enable,Synchronous mode enable UCB0CTL1 |= UCSSEL_2; // SMCLK UCB0BR0 |= 0×02; // /2 UCB0BR1 = 0; UCB0CTL1 &= ~UCSWRST; // Initialize USCI state machine }

void glcd_char(char c)
{ unsigned char i;

for (i=0 ; i<5 ; i++) { P1OUT |= DC; glcd_write(font[c – 0×20][i]); } P1OUT |= DC; glcd_write(0×00); }

void glcd_str(char *str)
{ while(*str) { glcd_char(*str); str++; }
}

void glcd_clr_disp(void)
{ unsigned short i; for(i = 0; i < 504; i++) { P1OUT |= DC; glcd_write(0×00); }
}

void glcd_set_cursor(unsigned char x, unsigned char y)
{ unsigned char x_addr = 0×80 | x; unsigned char y_addr = 0×40 | y; glcd_cmd(0×20); glcd_cmd(x_addr); glcd_cmd(y_addr);
}
int main(void)
{ WDTCTL = WDTPW + WDTHOLD; // Stop watchdog

glcd_clk_init(); glcd_spi_init(); glcd_init(); glcd_clr_disp(); glcd_set_cursor(0,2); glcd_char(‘A’); P1OUT |= CE; while(1); }

Luan 16 April 2017, 10:10

You may change the value in // set LCD Vop (contrast) command, instead 0×99 try use 0xE4