[National Technology N32G457 Review] RT-Thread drives SSD1306

lugl4313820

[National Technology N32G457 Review] RT-Thread drives SSD1306 [Copy link]

 

RT_Thread's software package center conveniently provides users with commonly used drivers. Today we use the software package center to drive the SSD1306 OLED screen.

1. Create a new project and choose the development board:

Open RT-Thread Settings:

Select Add Package:

Open the interface, search for ssd1306, and add the software package:

Select detailed configuration on the software package:

钩选sample

Check ENABLE I2C

Return to the interface

Enable C++ libc

Close the configuration and save it.

Change SCL SDA to Pin 92 93

Modify the configuration of drv_gpio.c to 100pin

Modify main.c to:

/*
 * Copyright (c) 2006-2021, RT-Thread Development Team
 *
 * SPDX-License-Identifier: Apache-2.0
 *
 * Change Logs:
 * Date           Author       Notes
 * 2015-07-29     Arda.Fu      first implementation
 */
#include <stdint.h>
#include <rtthread.h>
#include <rtdevice.h>
#include <board.h>

#include <string.h>
#include <stdio.h>
#include "ssd1306.h"



/* defined the LED1 pin: PB5 */
#define LED1_PIN    91

int main(void)
{
    uint32_t Speed = 200;
    /* set LED1 pin mode to output */
    rt_pin_mode(LED1_PIN, PIN_MODE_OUTPUT);
    rt_kprintf("start ssd1306\r\n");
    ssd1306_Init();
    ssd1306_Fill(Black);
    ssd1306_SetCursor(2,0);
    ssd1306_WriteString("HELLO NG32!", Font_11x18, White);
    ssd1306_SetCursor(2,18);
    ssd1306_WriteString("HAPPY NEW YEAR!", Font_7x10, White);
    ssd1306_UpdateScreen();
    while (1)
    {
        rt_pin_write(LED1_PIN, PIN_LOW);
        rt_thread_mdelay(Speed);
        rt_pin_write(LED1_PIN, PIN_HIGH);
        rt_thread_mdelay(Speed);
    }
}

Then compile and download:

Successfully light up the LED

You can successfully drive SSD1306 by following these steps. The main thing here is to modify the SCL SDA pins, which is a bit troublesome because the software package gives 23 and 24. I searched drv_gpio.c and found that there is no pin 23. By checking the data sheet, it is 92 (PB6) 93 (PB7). After half a day of tossing, the screen finally lights up! I hope to guide you.

fxyc87

Great, are you using soft I2C or hard I2C?

wangerxian

fxyc87 posted on 2022-1-25 13:44 Like, are you using soft I2C or hard I2C?

RTThread's IIC is generally implemented using software.

lugl4313820

fxyc87 posted on 2022-1-25 13:44 Like, are you using soft I2C or hard I2C?

It can be hard or soft, and there are routines for both. The routines for U8G2 are more clear.

annysky2012

RT-THREAD is simpler to implement. Looking forward to the follow-up