How can I define PORTE on STM32 as D0-D7 on LCD?

[antonius]

Posted on December 26, 2013 at 14:38

Guys,

How can I define PORTE on STM32 as D0-D7 on LCD?

I have more than 8bits on PORTE,

on AVR for example PORTA = data, how can I do it on STM32 ?

any ideas ?

thanks

[lowpowermcu]

Posted on December 26, 2013 at 16:23

Hi rick,

You can refer to ST library.

The ports are defined as GPIOA, GPIOB, GPIOC....

and evey port has 15 pins: Pin 0, Pin 1,.... Pin 15

[Tesla DeLorean]

Posted on December 26, 2013 at 16:44

GPIOE->BSRR = data | ((~data & 0xFF) << 16); //??

or

GPIOE->ODR = (GPIOE->ODR & 0xFF00) | data;

[antonius]

Posted on December 26, 2013 at 16:57

I wrote, please have a look and correct me :

//LCD Define

#define lcd_data_pin  GPIOE

#define rs    GPIO_Pin_8

#define rw    GPIO_Pin_9

#define en    GPIO_Pin_10

void GPIO_Configuration(void)

{

  GPIO_InitTypeDef GPIO_InitStructure;

 

  //RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOB , ENABLE);

       RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOB | RCC_APB2Periph_GPIOC | RCC_APB2Periph_GPIOE | RCC_APB2Periph_GPIOA, ENABLE);                         

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_3 | GPIO_Pin_4 | GPIO_Pin_5 | GPIO_Pin_6 | GPIO_Pin_7

    | GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10;

    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz;

    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;

    GPIO_Init(GPIOE, &GPIO_InitStructure);

}

void lcd_cmd(unsigned char cmd){

    //lcd_data_pin = cmd ;

    GPIO_Write(lcd_data_pin, cmd);

     GPIO_WriteBit(lcd_data_pin, en, Bit_SET);

     GPIO_WriteBit(lcd_data_pin, rs, Bit_RESET);

     GPIO_WriteBit(lcd_data_pin, rw, Bit_RESET);

    //en=1;

    //rs=0;

    //rw=0;

    vTaskDelay(10);

    GPIO_WriteBit(lcd_data_pin, en, Bit_RESET);

    //en=0;

    

}