【Ai-M61-32SU入门】I2C点亮OLED

I2C是一种简单的双向两线制总线协议标准，使用一根时钟线（SCL）和一根数据线（SDA）进行通讯
手里有个OLED的屏幕SSD1315 I2C驱动，接下来用Ai-M61-32SU通过I2C点亮它
先放上已经完成的驱动文件 my_oled_ssd1315.rar (5.87 KB, 下载次数: 10)

2024-5-21 21:04 上传

点击文件名下载附件
运行效果


接下来介绍使用方法
初始化i2c

1. void i2c_init()
   
2. {
   
3.     gpio = bflb_device_get_by_name("gpio");
   
4.     /* I2C0_SDA */
   
5.     bflb_gpio_init(gpio, GPIO_PIN_11, GPIO_FUNC_I2C0 | GPIO_ALTERNATE | GPIO_PULLUP | GPIO_SMT_EN | GPIO_DRV_1);
   
6.     /* I2C0_SCL */
   
7.     bflb_gpio_init(gpio, GPIO_PIN_10, GPIO_FUNC_I2C0 | GPIO_ALTERNATE | GPIO_PULLUP | GPIO_SMT_EN | GPIO_DRV_1);
   
8.     i2c0 = bflb_device_get_by_name("i2c0");
   
9.     bflb_i2c_init(i2c0, 100000);
   
10. }

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实现发送方法

1. uint8_t i2c_sendreg8(void *i2cx,uint8_t devaddr,uint8_t reg,uint8_t *datas,uint16_t datalen)
   
2. {
   
3.     struct bflb_i2c_msg_s msgs[2];
   
4. 
   
5.     msgs[0].addr = devaddr;
   
6.     msgs[0].flags = I2C_M_NOSTOP;
   
7.     msgs[0].buffer = ®
   
8.     msgs[0].length = 1;
   
9. 
   
10.     msgs[1].addr = devaddr;
    
11.     msgs[1].flags = I2C_M_WRITE;
    
12.     msgs[1].buffer = datas;
    
13.     msgs[1].length = datalen;
    
14.     return bflb_i2c_transfer(i2cx, msgs, 2) == 0?0:1;
    
15. }

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定义一个OLED的结构体，分配i2c指针和发送方法后初始化

1. MY_OLED_SSD1315_DEV_Type oled_dev;
   
2. void oled_init()
   
3. {
   
4.     i2c_init();
   
5.     oled_dev.i2cx = i2c0;
   
6.     oled_dev.i2c_senddatas_func = (MY_OLED_SSD1315_I2CSendDatasFunc_Type)i2c_sendreg8;
   
7.     MY_OLED_SSD1315_Init(&oled_dev);
   
8.     MY_OLED_SSD1315_ClearScreen(&oled_dev);
   
9.     MY_OLED_SSD1315_DisplayString8x16(&oled_dev,0,0,0,"Ai-M61-32SU TEST");
   
10.     MY_OLED_SSD1315_DisplayString8x16(&oled_dev,0,2,0,"    I2C OLED");
    
11.     MY_OLED_SSD1315_DisplayString8x16(&oled_dev,0,4,0,"bbs.ai-thinker.com");
    
12.     MY_OLED_SSD1315_DisplayString8x16(&oled_dev,0,6,0,"Code lvxinjia123");
    
13. }

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最后在main函数中调用

1. int main(void)
   
2. {
   
3.     board_init();
   
4.     gpio = bflb_device_get_by_name("gpio");
   
5.     bflb_gpio_init(gpio, GPIO_PIN_12, GPIO_OUTPUT | GPIO_FLOAT | GPIO_SMT_EN | GPIO_DRV_0);
   
6.     oled_init();
   
7.     while (1) {
   
8.         bflb_gpio_set(gpio, GPIO_PIN_12);
   
9.         bflb_mtimer_delay_ms(1000);
   
10.         bflb_gpio_reset(gpio, GPIO_PIN_12);
    
11.         bflb_mtimer_delay_ms(1000);
    
12.     }
    
13. }

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不错不错！

终于看到不一样的了

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