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STM32移植u8g2玩转oled 用软件iic实现驱动oled

news 2025/8/8 0:37:33

移植u8g2到stm

int fputc(int ch,FILE *f)
{ITM_SendChar(ch);return (ch);
}void delay_us(uint32_t time)
{uint32_t i=8*time;while(i--);
}uint8_t STM32_gpio_and_delay(u8x8_t *u8x8, uint8_t msg, uint8_t arg_int, void *arg_ptr)
{//printf("%s:msg = %d,arg_int = %d\r\n",__FUNCTION__,msg,arg_int);switch(msg){case U8X8_MSG_DELAY_100NANO:		// delay arg_int * 100 nano seconds__NOP();break;case U8X8_MSG_DELAY_10MICRO:		// delay arg_int * 10 micro secondsfor (uint16_t n = 0; n < 320; n++){__NOP();}     break;case U8X8_MSG_DELAY_MILLI:			// delay arg_int * 1 milli secondHAL_Delay(1);break;case U8X8_MSG_DELAY_I2C:		    // arg_int is the I2C speed in 100KHz, e.g. 4 = 400 KHz//delay 5usdelay_us(5);						// arg_int=1: delay by 5us, arg_int = 4: delay by 1.25uscase U8X8_MSG_GPIO_I2C_CLOCK:		// arg_int=0: Output low at I2C clock pinif(arg_int == 1) {HAL_GPIO_WritePin(GPIOB, SCL2_Pin, GPIO_PIN_SET);}else if(arg_int == 0){HAL_GPIO_WritePin(GPIOB, SCL2_Pin, GPIO_PIN_RESET);  }          break;							// arg_int=1: Input dir with pullup high for I2C clock pincase U8X8_MSG_GPIO_I2C_DATA:		// arg_int=0: Output low at I2C data pin//  printf("U8X8_MSG_GPIO_I2C_DATA:%d\r\n",arg_int);if(arg_int == 1) {HAL_GPIO_WritePin(GPIOB, SDA2_Pin, GPIO_PIN_SET);}else if(arg_int == 0){HAL_GPIO_WritePin(GPIOB, SDA2_Pin, GPIO_PIN_RESET);  }         break;							// arg_int=1: Input dir with pullup high for I2C data pindefault:u8x8_SetGPIOResult(u8x8, 1);		// default return valuebreak;}return 1;
}

这里是驱动iic

	u8g2_t u8g2; // a structure which will contain all the data for one displayu8g2_Setup_ssd1306_i2c_128x64_noname_f(&u8g2, U8G2_R0, u8x8_byte_sw_i2c, STM32_gpio_and_delay);  // init u8g2 structureu8g2_InitDisplay(&u8g2); // send init sequence to the display, display is in sleep mode after this,u8g2_SetPowerSave(&u8g2, 0); // wake up displayint t;

这里可以驱动u8g2 具体作用后续学习

下面就基本上可以驱动成功最主要是修改后的u8g2的图

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