meiyao 发表于 2023-6-19 21:50

【STM32H5开发板】使用SPI点亮OLED

<p>开发平台：KEIL</p>

<p>开发板：STM32H5</p>

<p>目地：本篇是利用STM32H5点亮OLED，显示相关信息hello world</p>

<p>1、原理图：</p>

<p>OLED原理图：</p>

<p></p>

<p>MCU脚位：</p>

<p></p>

<p>2.使用的引脚：</p>

<p>PB3--CS</p>

<p>PB4--DC</p>

<p>PB5--MOSI</p>

<p>PB9--CLK&nbsp;</p>

<p>H5开发板与OLED连接方式</p>

<p></p>

<p>3、SPI连接位置</p>

<p></p>

<p>4、核心代码：</p>

<pre>
<code>引脚定义：
#define OLED_CS_Clr()HAL_GPIO_WritePin(GPIOB, GPIO_PIN_3,GPIO_PIN_RESET);
#define OLED_CS_Set()HAL_GPIO_WritePin(GPIOB, GPIO_PIN_3,GPIO_PIN_SET);

#define OLED_DC_Clr()HAL_GPIO_WritePin(GPIOB, GPIO_PIN_4,GPIO_PIN_RESET);
#define OLED_DC_Set()         HAL_GPIO_WritePin(GPIOB, GPIO_PIN_4,GPIO_PIN_SET);
                                          
#define OLED_RST_Clr()HAL_GPIO_WritePin(GPIOB, GPIO_PIN_5,GPIO_PIN_RESET);
#define OLED_RST_Set()HAL_GPIO_WritePin(GPIOB, GPIO_PIN_5,GPIO_PIN_SET);

#define OLED_MOSI_Clr()HAL_GPIO_WritePin(GPIOB, GPIO_PIN_8,GPIO_PIN_RESET);
#define OLED_MOSI_Set()HAL_GPIO_WritePin(GPIOB, GPIO_PIN_8,GPIO_PIN_SET);

#define OLED_CLK_Clr()   HAL_GPIO_WritePin(GPIOB, GPIO_PIN_9,GPIO_PIN_RESET);
#define OLED_CLK_Set()   HAL_GPIO_WritePin(GPIOB, GPIO_PIN_9,GPIO_PIN_SET);


初始化：
        __GPIOB_CLK_ENABLE();
        GPIO_InitTypeDefGPIO_InitStruct;
        GPIO_InitStruct.Mode= GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull= GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;

GPIO_InitStruct.Pin = GPIO_PIN_3|GPIO_PIN_4|GPIO_PIN_5|GPIO_PIN_8|GPIO_PIN_9;
HAL_GPIO_Init(GPIOB, &amp;GPIO_InitStruct);

/**************???SSD1306*****************/       
        OLED_WR_Byte(0xAE,OLED_CMD); /*display off*/
        OLED_WR_Byte(0x00,OLED_CMD); /*set lower column address*/
        OLED_WR_Byte(0x10,OLED_CMD); /*set higher column address*/
        OLED_WR_Byte(0x40,OLED_CMD); /*set display start line*/
        OLED_WR_Byte(0xB0,OLED_CMD); /*set page address*/
        OLED_WR_Byte(0x81,OLED_CMD); /*contract control*/
        OLED_WR_Byte(0xFF,OLED_CMD); /*128*/
        OLED_WR_Byte(0xA1,OLED_CMD); /*set segment remap*/
        OLED_WR_Byte(0xA6,OLED_CMD); /*normal / reverse*/
        OLED_WR_Byte(0xA8,OLED_CMD); /*multiplex ratio*/
        OLED_WR_Byte(0x3F,OLED_CMD); /*duty = 1/64*/
        OLED_WR_Byte(0xC8,OLED_CMD); /*Com scan direction*/
        OLED_WR_Byte(0xD3,OLED_CMD); /*set display offset*/
        OLED_WR_Byte(0x00,OLED_CMD);
        OLED_WR_Byte(0xD5,OLED_CMD); /*set osc division*/
        OLED_WR_Byte(0x80,OLED_CMD);
        OLED_WR_Byte(0xD9,OLED_CMD); /*set pre-charge period*/
        OLED_WR_Byte(0XF1,OLED_CMD);
        OLED_WR_Byte(0xDA,OLED_CMD); /*set COM pins*/
        OLED_WR_Byte(0x12,OLED_CMD);
        OLED_WR_Byte(0xDB,OLED_CMD); /*set vcomh*/
        OLED_WR_Byte(0x30,OLED_CMD);
        OLED_WR_Byte(0x8D,OLED_CMD); /*set charge pump disable*/
        OLED_WR_Byte(0x14,OLED_CMD);
        OLED_WR_Byte(0xAF,OLED_CMD); /*display ON*/


hspi1.Instance = SPI1;
hspi1.Init.Mode = SPI_MODE_MASTER;
hspi1.Init.Direction = SPI_DIRECTION_2LINES;
hspi1.Init.DataSize = SPI_DATASIZE_8BIT;
hspi1.Init.CLKPolarity = SPI_POLARITY_LOW;
hspi1.Init.CLKPhase = SPI_PHASE_1EDGE;
hspi1.Init.NSS = SPI_NSS_SOFT;
hspi1.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_256;
hspi1.Init.FirstBit = SPI_FIRSTBIT_MSB;
hspi1.Init.TIMode = SPI_TIMODE_DISABLE;
hspi1.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLE;
hspi1.Init.CRCPolynomial = 0x7;
hspi1.Init.NSSPMode = SPI_NSS_PULSE_DISABLE;
hspi1.Init.NSSPolarity = SPI_NSS_POLARITY_LOW;
hspi1.Init.FifoThreshold = SPI_FIFO_THRESHOLD_01DATA;
hspi1.Init.MasterSSIdleness = SPI_MASTER_SS_IDLENESS_00CYCLE;
hspi1.Init.MasterInterDataIdleness = SPI_MASTER_INTERDATA_IDLENESS_00CYCLE;
hspi1.Init.MasterReceiverAutoSusp = SPI_MASTER_RX_AUTOSUSP_DISABLE;
hspi1.Init.MasterKeepIOState = SPI_MASTER_KEEP_IO_STATE_DISABLE;
hspi1.Init.IOSwap = SPI_IO_SWAP_DISABLE;
hspi1.Init.ReadyMasterManagement = SPI_RDY_MASTER_MANAGEMENT_INTERNALLY;
hspi1.Init.ReadyPolarity = SPI_RDY_POLARITY_HIGH;
if (HAL_SPI_Init(&amp;hspi1) != HAL_OK)
{
    Error_Handler();
}

显示


        if(Char_Size == 16)
{
          csize = Char_Size/2;
        }
else if(Char_Size == 8)
{
          csize = Char_Size/2+2;
        }
        else
        {
                return;
        }
        while (chr!='\0')
        {               
                GUI_ShowChar(x,y,chr,Char_Size,mode);
                x+=csize;
                if(x&gt;120)
                {
                        x=0;
                        y+=Char_Size/8;
                }
                j++;
        }

                GUI_ShowString(0,0,(unsigned char*)"6x8:hello word",8,1);</code></pre>

<p>5.视频：</p>

<p>e774d1310517d4a554afec55391198ce<br />
&nbsp;</p>

火辣西米秀 发表于 2023-6-23 20:46

<p>用SPI点亮OLED 了</p>

<p> &nbsp;</p>

freebsder 发表于 2023-6-24 22:34

<p>那一串OLED_WR_Byte好魔幻，器件手册里也没说为啥要这样设置。</p>

meiyao 发表于 2023-6-25 17:47

火辣西米秀 发表于 2023-6-23 20:46
用SPI点亮OLED 了

&nbsp;

<p>是的呢</p>
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