BARE METAL FRDM-KL25Z Port D enable for LCD

garabito — Sat, 12 Mar 2016 00:49:04 GMT

I try to use a LCD with the PORT D, but the problem is when i use the port D[0], it turn the blue led for LED RGB and the port D[0] on LCD didn't send nothing, so how can i enable only the PORT D for use the LCD?

This is part of my code

void LCD_init(void)
{
SIM->SCGC5 |= 0x1000; /* enable clock to Port D */
PORTD->PCR[0] = 0x100; /* make PTD0 pin as GPIO for LCD DB0*/
PORTD->PCR[1] = 0x100; /* make PTD1 pin as GPIO for LCD DB1 */
PORTD->PCR[2] = 0x100; /* make PTD2 pin as GPIO for LCD DB2*/
PORTD->PCR[3] = 0x100; /* make PTD3 pin as GPIO for LCD DB3*/
PORTD->PCR[4] = 0x100; /* make PTD4 pin as GPIO for LCD DB4*/
PORTD->PCR[5] = 0x100; /* make PTD5 pin as GPIO for LCD DB5*/
PORTD->PCR[6] = 0x100; /* make PTD6 pin as GPIO for LCD DB6*/
PORTD->PCR[7] = 0x100; /* make PTD7 pin as GPIO for LCD DB7*/
PTD->PDDR = 0xFF; /* make PTD7-0 as output pins */
SIM->SCGC5 |= 0x0200; /* enable clock to Port A */
PORTA->PCR[2] = 0x100; /* make PTA2 pin as GPIO for LCD RS*/
PORTA->PCR[4] = 0x100; /* make PTA4 pin as GPIO for LCD RW*/
PORTA->PCR[5] = 0x100; /* make PTA5 pin as GPIO for LCD E*/
PTA->PDDR |= 0x34; /* make PTA5, 4, 2 as output pins */
delayMs(20); /* initialization sequence */
LCD_command_noWait(0x30); /* LCD does not respond to status poll */
delayMs(5);
LCD_command_noWait(0x30);
delayMs(1);
LCD_command_noWait(0x30);
LCD_command(0x38); /* set 8-bit data, 2-line, 5x7 font */
LCD_command(0x06); /* move cursor right */
LCD_command(0x01); /* clear screen, move cursor to home */
LCD_command(0x0F); /* turn on display, cursor blinking */
}

Thanks

Re: BARE METAL FRDM-KL25Z Port D enable for LCD

mjbcswitzerland — Sat, 12 Mar 2016 09:07:01 GMT

The blue LED on the FRDM-KL25Z is connected to PTD1 and not PTD0.

You haven't show any code that actually changes the PTD0 or PTD1 outputs so the problem can't be seen.

If you need to work with a character LCD and the FRDM-KL25Z there is a complete solution at: http://www.utasker.com/kinetis/FRDM-KL25Z.html - fully documented at http://www.utasker.com/docs/uTasker/uTaskerLCD.PDF and including accurate simulation of the KL25 and LCD.

Regards

Mark

Re: BARE METAL FRDM-KL25Z Port D enable for LCD

garabito — Thu, 17 Mar 2016 01:25:48 GMT

This is to embarrassing , but the problem was in the hardware, today I and change the protoboard and it worked. Any way, thanks for the links, I will check it.

Thanks

topic BARE METAL FRDM-KL25Z Port D enable for LCD in Kinetis Microcontrollers

BARE METAL FRDM-KL25Z Port D enable for LCD

Re: BARE METAL FRDM-KL25Z Port D enable for LCD

Re: BARE METAL FRDM-KL25Z Port D enable for LCD