【N32G430开发板试用】SPI_OLED

只看该作者 · 2022-7-11 12:17

@安小芯       感谢国民技术及21ic提供的开发板，收到板后，经过几天的摸索，上个OLED屏测试一下。手上的屏幕是SPI接口的，这里仅以软件的方式来实现。本程序使用GPIOB连接显示屏，测试程序占用以下管脚：
#define OLED_SCL          GPIO_PIN_11
#define OLED_SDA          GPIO_PIN_10
#define OLED_RES          GPIO_PIN_2
#define OLED_DC          GPIO_PIN_1
#define OLED_CS          GPIO_PIN_0

实现高低电位控制语句如下：
#define OLED_SCL_Clr() GPIOB->PBC = OLED_SCL; SysTick_Delay_Us(2);//CLK
#define OLED_SCL_Set() GPIOB->PBSC = OLED_SCL;SysTick_Delay_Us(2);

#define OLED_SDA_Clr() GPIOB->PBC = OLED_SDA;SysTick_Delay_Us(2);//DIN
#define OLED_SDA_Set() GPIOB->PBSC = OLED_SDA;SysTick_Delay_Us(2);

#define OLED_RES_Clr() GPIOB->PBC = OLED_RES;SysTick_Delay_Us(2);//RES
#define OLED_RES_Set() GPIOB->PBSC = OLED_RES;SysTick_Delay_Us(2);

#define OLED_DC_Clr() GPIOB->PBC = OLED_DC;SysTick_Delay_Us(2);//DC
#define OLED_DC_Set() GPIOB->PBSC = OLED_DC;SysTick_Delay_Us(2);

#define OLED_CS_Clr() GPIOB->PBC = OLED_SDA;SysTick_Delay_Us(2);//CS
#define OLED_CS_Set() GPIOB->PBSC = OLED_SDA;SysTick_Delay_Us(2);

GPIO初始化及OLED初始化函数如下：

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void OLED_Init(void)

{         

    GPIO_InitType GPIO_InitStructure;

          RCC_AHB_Peripheral_Clock_Enable(RCC_AHB_PERIPH_GPIOB);

//                GPIO_Structure_Initialize(&GPIO_InitStructure);

//    RCC_EnableAPB2PeriphClk(RCC_APB2_PERIPH_GPIOB, ENABLE);

    GPIO_InitStructure.Pin = GPIO_PIN_0|GPIO_PIN_1|GPIO_PIN_2|GPIO_PIN_10|GPIO_PIN_11;

    GPIO_InitStructure.GPIO_Mode  = GPIO_MODE_OUT_PP;

    GPIO_InitStructure.GPIO_Slew_Rate = GPIO_SLEW_RATE_FAST;

//    GPIO_InitStructure.GPIO_Current = GPIO_DS_4MA;

          GPIO_Peripheral_Initialize(GPIOB, &GPIO_InitStructure);



        OLED_RES_Clr();

SysTick_Delay_Ms(100);

        OLED_RES_Set();        

SysTick_Delay_Ms(100);



    OLED_WR_Byte(0xAE,OLED_CMD);

    OLED_WR_Byte(0x02,OLED_CMD);

    OLED_WR_Byte(0x10,OLED_CMD);

    OLED_WR_Byte(0x40,OLED_CMD);

    OLED_WR_Byte(0x81,OLED_CMD);

    OLED_WR_Byte(0xff,OLED_CMD);

    OLED_WR_Byte(0xA1,OLED_CMD);

    OLED_WR_Byte(0xC8,OLED_CMD);

    OLED_WR_Byte(0xA6,OLED_CMD);

    OLED_WR_Byte(0xA8,OLED_CMD);

    OLED_WR_Byte(0x3f,OLED_CMD);

    OLED_WR_Byte(0xD3,OLED_CMD);

    OLED_WR_Byte(0x00,OLED_CMD);

    OLED_WR_Byte(0xd5,OLED_CMD);

    OLED_WR_Byte(0x80,OLED_CMD);

    OLED_WR_Byte(0xD9,OLED_CMD);

    OLED_WR_Byte(0xF1,OLED_CMD);

    OLED_WR_Byte(0xDA,OLED_CMD);

    OLED_WR_Byte(0x12,OLED_CMD);

    OLED_WR_Byte(0xDB,OLED_CMD);

    OLED_WR_Byte(0x40,OLED_CMD);

    OLED_WR_Byte(0x20,OLED_CMD);

    OLED_WR_Byte(0x02,OLED_CMD);

    OLED_WR_Byte(0x8D,OLED_CMD);

    OLED_WR_Byte(0x14,OLED_CMD);

    OLED_WR_Byte(0xA4,OLED_CMD);

    OLED_WR_Byte(0xA6,OLED_CMD);

    OLED_WR_Byte(0xAF,OLED_CMD);

    OLED_WR_Byte(0xAF,OLED_CMD);}

主程序如下：

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int main(void)

{

OLED_Init();



OLED_Clear(0);



OLED_ShowString(0,0,"n32g430",16);



OLED_ShowString(0,2,"OLED TEST",16);

        

OLED_ShowString(0,4,"21.COM",16);



}

实际运行如图:

程序已打包，感谢各位观看~

spi_oled.zip (1.74 MB)

只看该作者 · 2022-7-13 08:37

模拟SPI

只看该作者 · 2022-7-14 18:38

这个尺寸的OLED也是常用

只看该作者 · 2022-7-15 08:58

模拟SPI 不整个硬件SPI+DMA