This time you have to test the drive OLED12864 display. The OLED12864 module uses IIC interface, SDA picks RF4 pin, SCL picks RF5 pin, power supply is 3.3V. IIC timing use software simulation, using forced read and 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 (port_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 (port_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");
ASM ("NOP"); ASM ("NOP"); ASM ("NOP"); ASM ("NOP");
ASM ("NOP"); ASM ("NOP"); ASM ("NOP"); ASM ("NOP");
ASM ("NOP"); ASM ("NOP"); ASM ("NOP"); ASM ("NOP");
ASM ("NOP"); ASM ("NOP"); ASM ("NOP"); ASM ("NOP");
ASM ("NOP"); ASM ("NOP"); ASM ("NOP"); ASM ("NOP");
ASM ("NOP"); ASM ("NOP"); ASM ("NOP"); ASM ("NOP");
ASM ("NOP"); ASM ("NOP"); ASM ("NOP"); ASM ("NOP");
ASM ("NOP"); ASM ("NOP"); ASM ("NOP"); ASM ("NOP");
ASM ("NOP"); ASM ("NOP"); ASM ("NOP"); ASM ("NOP");
ASM ("NOP"); ASM ("NOP"); ASM ("NOP"); ASM ("NOP");
ASM ("NOP"); ASM ("NOP"); ASM ("NOP"); ASM ("NOP");
ASM ("NOP"); ASM ("NOP"); ASM ("NOP"); ASM ("NOP");
ASM ("NOP"); ASM ("NOP"); ASM ("NOP"); ASM ("NOP");
ASM ("NOP"); ASM ("NOP"); ASM ("NOP"); ASM ("NOP");
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 answering
IIC_send_byte (0x00); // Write command
IIC_SCL (0);
Delayus (2);
IIC_SCL (1);
Delayus (2);
IIC_SCL (0);
DELAYUS (2); // Skip the answering
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;
}
}
}
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