MCU programming and driving OLED12864 display test

The test to be tested this time is to drive the OLED12864 display. The OLED12864 module uses the IIC interface, SDA is connected to the RF4 pin, SCL is connected to the RF5 pin, and the power supply is 3.3V. The IIC timing uses software simulation and uses a forced read/write mode.

1.iic.h file

#ifndef __IIC_H

#define __IIC_H

#include

#include "system_config.h"

#define IIC_SCL(status) if(status) \

PLIB_PORTS_PinSet(PORTS_ID_0, PORT_CHANNEL_F, PORTS_BIT_POS_5);\

Else

PLIB_PORTS_PinClear(PORTS_ID_0, PORT_CHANNEL_F, PORTS_BIT_POS_5)

#define IIC_SDA_OUT(status) if(status) \

PLIB_PORTS_PinSet(PORTS_ID_0, PORT_CHANNEL_F, PORTS_BIT_POS_4);\

Else

PLIB_PORTS_PinClear(PORTS_ID_0, PORT_CHANNEL_F, PORTS_BIT_POS_4)

#define DELAY_US asm("nop");asm("nop");asm("nop"); asm("nop");\

Asm("nop");asm("nop");asm("nop"); asm("nop");\

Asm("nop");asm("nop");asm("nop"); asm("nop")

Void IIC_Init(void);

Void IIC_Start(void);

Void IIC_Stop(void);

Void IIC_Send_Byte(uint8_t data);

Void DelayMs(uint32_t msDelay );

Void DelayUs(uint32_t usDelay );

2.iic.c file

#include "iic.h"

Void IIC_Start(void)//Generate start timing

{

IIC_SCL(0);

DelayUs(2);

IIC_SDA_OUT(1);

DelayUs(2);

IIC_SCL(1);

DelayUs(2);

IIC_SDA_OUT(0);

DelayUs(2);

IIC_SCL(0);

DelayUs(2);

}

Void IIC_Stop(void)//Generate stop timing

{

IIC_SCL(0);

DelayUs(2);

IIC_SDA_OUT(0);

DelayUs(2);

IIC_SCL(1);

DelayUs(2);

IIC_SDA_OUT(1);

DelayUs(2);

}

3.oled.c: OLED initialization and driver

Void OLED_Write_CMD(uint8_t oled_cmd)//write command function

{

IIC_Start();

IIC_Send_Byte (0x78); / / module address

IIC_SCL(0);

DelayUs(2);

IIC_SCL(1);

DelayUs(2);

IIC_SCL(0);

DelayUs(2);// Skip the acknowledge bit

IIC_Send_Byte (0x00); / / write command

IIC_SCL(0);

DelayUs(2);

IIC_SCL(1);

DelayUs(2);

IIC_SCL(0);

DelayUs(2);// Skip the acknowledge bit

IIC_Send_Byte(oled_cmd);//Command value

IIC_Stop();

}

4.app.c: Display "1234".

#include "app.h"

#include "oled.h"

#include "iic.h"

#include "bsp.h"

APP_DATA appData;

Void APP_Initialize ( void )

{

appData.state = APP_STATE_INIT;

}

Void APP_Tasks ( void )

{

Switch ( appData.state )

{

Case APP_STATE_INIT:

{

DelayMs(100);

OLED_Init();

OLED_Clear();

appData.state = APP_STATE_SERVICE_TASKS;

Break;

}

Case APP_STATE_SERVICE_TASKS:

{

OLED_Show_Char0816((16 + 1), 0,0); //"1"

OLED_Show_Char0816((16 + 2), 0,8); //"2"

OLED_Show_Char0816((16 + 3), 0,16);//"3"

OLED_Show_Char0816((16 + 4), 0,24);//"4"

DelayMs(1000);

Break;

}

5. Display effect

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