8-bit data bus setting

[kemal]

Posted on January 21, 2015 at 21:34

hi all

Where is my error check this code?

How do I make an 8-bit data bus?

thanks

#include <

stm32f10x.h

>

#include <

stm32f10x_conf.h

>

#include <

stm32f10x_rcc.h

>

#include <

stm32f10x_gpio.h

>

#include ''fonts.h''

#include <

stdio.h

>

#include <

string.h

>

#define Set_CS GPIO_SetBits(GPIOC,GPIO_Pin_1);

#define Clr_CS GPIO_ResetBits(GPIOC,GPIO_Pin_1);

#define Set_RS GPIO_SetBits(GPIOB,GPIO_Pin_9);

#define Clr_RS GPIO_ResetBits(GPIOB,GPIO_Pin_9);

#define Set_WR GPIO_SetBits(GPIOB,GPIO_Pin_8);

#define Clr_WR GPIO_ResetBits(GPIOB,GPIO_Pin_8);

#define Set_RST GPIO_SetBits(GPIOC,GPIO_Pin_0);

#define Clr_RST GPIO_ResetBits(GPIOC,GPIO_Pin_0);

#define Set_LED GPIO_SetBits(GPIOB,GPIO_Pin_11);

#define Clr_LED GPIO_ResetBits(GPIOB,GPIO_Pin_11);

GPIO_InitTypeDef GPIO_InitStructure;

//************************************************************************

void LCD_InitializePorts(void);

void Write_Data(unsigned char data);

void Delay(volatile uint32_t nCount);

//*************************************************************************

void Delay(volatile uint32_t nCount) {

for (; nCount != 0; nCount--);

}

//*************************************************************************

void Write_Data(unsigned char data)

{

Set_RS;

Clr_CS;

GPIOB->ODR = (GPIOB->ODR&0xff00)|(data&0x00ff); //PIN_0 1.2.3.4.5.6.7

Clr_WR;

Set_WR;

Set_CS;

LCD_Delay();

}

//*************************************************************************

void LCD_InitializePorts(void)

{

GPIO_InitTypeDef GPIO_InitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);

GPIO_StructInit(&GPIO_InitStructure); //PIN_0 1.2.3.4.5.6.7 LCD DATA PORT// //WR PIN 8 // RS PIN 9 // //LED PIN 11//

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_11;

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;

GPIO_Init(GPIOB, &GPIO_InitStructure);

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);

GPIO_StructInit(&GPIO_InitStructure);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1;//RST pin //CS pin

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;

GPIO_Init(GPIOC, &GPIO_InitStructure);

}

//*************************************************************************

int main(void)

{

Delay(0XF111F);

LCD_InitializePorts();

while(1)

{

Set_LED ;

Delay(0XF111F);

Clr_LED ;

Delay(0XF111F);

}

}

//*************************************************************************

[Tesla DeLorean]

Posted on January 21, 2015 at 22:17

Where is my error check this code?

How do I make an 8-bit data bus?

Lost something in the translation there.
 The way you have the code set up the data bus is using PB0..PB7
 Provide some context to your question, for example by diagramming how the LCD has been connected. 

[kemal]

Posted on January 21, 2015 at 23:58

I tried at98snormal working.

I'm using this LCD

http://www.lovbuy.com/arduino2560-supporting-35-lcd-screenili-9327-p-7html?language=en

I first started The series stm32f

I do not know how stm32f series data port.

Is this code correct?

GPIOB->ODR = (GPIOB->ODR&0xff00)|(data&0x00ff); //DATA BUSPORTB connected //PINS_0 1.2.3.4.5.6.7  

thanks

[Tesla DeLorean]

Posted on January 22, 2015 at 00:11

Yes, that would mask on the low order 8-bits to the Output Data Register (ODR)

The B Bank has 16 bits reflected on PB0 thru PB15

[kemal]

Posted on January 22, 2015 at 01:16

thanks

You're

my brother