7.1.4 SPI驱动程序

 

/**

* @brief SPI send data/command

* @param dat

*/

void SendDataSPI(unsigned char dat)

{

unsigned char i;

 

for(i=0; i<8; i++)

{

LCD_SCL_LOW;

if( (dat&0x80)!=0 ){

LCD_SDA_HIGH;

}else{

LCD_SDA_LOW;

}

dat <<= 1;

LCD_SCL_HIGH;

}

}

/**

* @brief this function is write command to lcd.

* @param command : 写进去的命令值.

* @retval none

*/

void WriteComm(unsigned char command)

{

LCD_CS_LOW;

LCD_RS_LOW;//拉低选择发送命令

SendDataSPI(command);

LCD_CS_HIGH;

}

/**

* @brief this function is write data to lcd.

* @param data : the data to write.

* @retval none

*/

void WriteData(unsigned char data)

{

LCD_CS_LOW;

LCD_RS_HIGH;//拉高选择发送数据

SendDataSPI(data);

LCD_CS_HIGH;

}

/**

* @brief configures the oled.

* this function must be called before any write/read operation

* on the oled.

*/

void OLED_init(void)

{

lcd_port_init();

 

delay_ms(1);

LCD_RS_HIGH;

LCD_CS_HIGH;

 

LCD_RESET_LOW; // OLED复位

delay_ms(100); //复位延时

LCD_RESET_HIGH; //结束复位

WriteComm(0xAE); //Display Off

WriteComm(0xD5); //SET DISPLAY CLOCK

WriteComm(0x80); //105HZ

WriteComm(0xA8); //Select Multiplex Ratio

WriteComm(0x3F); //Default => 0x3F (1/64 Duty)

WriteComm(0xD3); //Setting Display Offset

WriteComm(0x00); //00H Reset

WriteComm(0x40); //Set Display Start Line

WriteComm(0x8D); //Set Charge Pump

//Write_Command(0x10); //Disable Charge Pump

WriteComm(0x14); //Enable Charge Pump

WriteComm(0xAD); // Internal IREF Setting

WriteComm(0x20); // Disable internal IREF

//Write_command(0x30); // Enable internal IREF

WriteComm(0xA1); //Set Segment Re-Map Default

WriteComm(0xC8); //Set COM Output Scan Direction

WriteComm(0xDA); //Set COM Hardware Configuration

WriteComm(0x12); //Alternative COM Pin

WriteComm(0x81); //Set Contrast Control

WriteComm(0X0F);

WriteComm(0xD9); //Set Pre-Charge period

WriteComm(0xF1);

WriteComm(0xDB); //Set Deselect Vcomh level

WriteComm(0x30);

WriteComm(0xA4); //Entire Display ON

WriteComm(0xA6); //Set Normal Display

//Clear_Ram();

WriteComm(0xAF); //Display ON

}

void lcd_address(unsigned char page,unsigned char column)

{

column=column-1; //我们平常所说的第 1 列，在 LCD 驱动 IC 里是第 0 列。所以在这里减去 1.

page=page-1;

//设置页地址。每页是 8 行。一个画面的 64 行被分成 8 个页。我们平常所说的第 1 页，在 LCD 驱动IC 里是第 0 页，所以在这里减去 1

WriteComm(0xb0+page);

WriteComm(((column>>4)&0x0f)+0x10); //设置列地址的高 4 位

WriteComm(column&0x0f); //设置列地址的低 4 位

}

//全屏清屏

void full_display(unsigned short color)

{

unsigned char data1,data2, i,j;

data1 = color >> 8;

data2 = color;

for(i=0;i<8;i++)

{

lcd_address(i+1,1);

for(j=0;j<64;j++)

{

WriteData(data1);

WriteData(data2);

}

}

}

uint8_t OLED_GRAM1[128][8];

 

//更新显存到LCD

void OLED_Refresh_Gram(void)

{

uint8_t i,n;

for(i=0;i<8;i++)

{

WriteComm (0xB0+i); //设置页地址（0~7）

WriteComm (0x00); //设置显示位置—列低地址

WriteComm (0x10); //设置显示位置—列高地址

 

for(n=0;n<128;n++)

WriteData(OLED_GRAM1[n][i]);

}

}

 

//画点

//x:0~127

//y:0~63

//t:1 填充 0,清空

void OLED_DrawPoint1(uint8_t x,uint8_t y,uint8_t t)

{

uint8_t pos,bx,temp=0;

if(x>127||y>63)return;//超出范围了.

pos=7-y/8;

bx=y%8;

temp=1<<(7-bx);

if(t)OLED_GRAM1[x][pos]|=temp;

else OLED_GRAM1[x][pos]&=~temp;

OLED_Refresh_Gram();