【orangepi zero试用体验】使用GPIO模拟SPI时序控制LCD5110

单片机

本帖最后由 384998430 于 2016-12-16 11:28 编辑

使用GPIO模拟SPI是单片机开发中常用的一种手段，GPIO还可以模拟IIC等总线的时序，可以用在没有相应外设的处理器上，节省成本。

下面的代码是软模SPI写LCD5110的程序：

void WriteByte(unsigned char byte,unsigned char dc)
{
int i;
CE(0);
DC(dc);
for(i=0;i<8;i++)
{
if(byte & 0x80)
DIN(1);
else
DIN(0);
CLK(0);
// usleep(10);//LCD5110的响应速度很快，不加延时也行！！！
CLK(1);
// usleep(10);
byte <<= 1;
}
CE(1);
}

复制代码

下面的代码是刷新LCD的两个函数，第一个是使用84*48点阵的数组，第二个是使用84*6点阵的数组：

int LCD_Buffer[48 * 84] =
{ 0x00，};
void LCD_Refresh()
{
unsigned int i,j,k;
unsigned char data;
WriteByte(0x40,0);
WriteByte(0x80,0);
for(i=0;i<6;i++)
{
for(j=0;j<84;j++)
{
for(k=0;k<8;k++)
{
data >>= 1;
if( LCD_Buffer[ ( (i<<3) + k ) * 84 + j ] )
data |= 0x80;
}
// printf("%X ",data);
WriteByte(data,1);
}
// printf("rn");
}
}
unsigned char nBitmapDot[] = // 数据表
{
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x80,0xC0,0xE0,0xE0,0xE0,
0xE0,0xE0,0xE0,0xE0,0xE0,0xC0,0x80,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x06,0x0F,0x0F,0x07,0x0F,0x0E,0x1E,0x1C,0x00,0x00,0x00,0x00,0x00,0x00,0x01,
0x01,0x01,0x00,0x00,0x80,0xC0,0xE0,0xF0,0xFF,0x7F,0x1F,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x3C,0x7E,0x7C,0x70,0x70,0x60,0x00,0x00,0x00,0x00,0x00,0x00,0xC0,0xC0,0xE0,
0xC0,0x30,0x78,0x78,0x78,0x7C,0x7E,0x7F,0x77,0x77,0xF3,0xF1,0xF0,0xF0,0x70,0x70,
0x70,0xF0,0x70,0x70,0x70,0x70,0x70,0x70,0x70,0x70,0x70,0xF0,0xE0,0xE0,0xC0,0x80,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xC0,
0xFF,0xFF,0x7F,0x01,0x00,0x00,0x00,0x00,0x00,0x80,0xC0,0xE0,0xF8,0xFF,0x3F,0x0F,
0x03,0x03,0x03,0x00,0xFF,0xFF,0xFF,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x01,0x01,0x07,0xFF,0xFF,0xFC,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x80,0x80,0x80,0xC0,0xE0,
0xF8,0x7E,0x3F,0x1F,0x03,0x03,0x00,0x00,0x00,0x00,0x00,0x00,0x06,0x07,0x07,0x03,
0x01,0x80,0xC0,0xE0,0xF0,0xF8,0x7C,0x3E,0x0F,0x8F,0xC7,0x80,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x80,0xFF,0xFF,0xFF,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x03,
0x03,0x03,0x03,0x03,0x01,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x01,0x03,0x03,0x01,0x00,0x00,0x00,0x00,0x07,0x0F,0x0F,
0x0E,0x0E,0x0E,0x0E,0x0E,0x0E,0x0E,0x0F,0x07,0x07,0x07,0x07,0x03,0x03,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00
};
void LCD_Refresh2(unsigned char *buff)
{
unsigned int i,j;
WriteByte(0x40,0);
WriteByte(0x80,0);
// for(i=0;i<6;i++)
// {
// for(j=0;j<84;j++)
// {
// WriteByte(buff[i*84 + j],1);
// }
// }
for(i=0;i<6*84;i++)
{
WriteByte(buff[i],1);
}
}