void lcd_send_byte(unsigned char byte)
{
unsigned char i, temp;
temp = byte;
for(i = 0; i < 8; i++)
{
LCD_SCK_LOW();
if(temp & 0x80)
{
LCD_MOSI_HIGH();
}
else
{
LCD_MOSI_LOW();
}
LCD_SCK_HIGH();
temp <<= 1;
}
}
static void Initialize_SPI(void)
{
// Initialize SPI Interface pins as GPIOs
LCD_MOSI_MAKE_OUT();
LCD_SCK_MAKE_OUT();
LCD_SCK_HIGH();
LCD_MOSI_HIGH()
}
/** Transfer data to a slave (MSB first)
*
* @param sck the pin to use for the SCK output
* @param mosi the pin to use for the MOSI output
* @param data the data to transfer
* @param bits the number of bits to transfer
*/
void sspiOutMSB(uint8_t data) {
uint8_t bit;
for(bit = 0x80; bit; bit >>= 1) {
// Bring the clock low
LCD_SCK_LOW();
// Set data
if(data & bit) {
LCD_MOSI_HIGH();
} else {
LCD_MOSI_LOW();
}
// Bring the clock high
LCD_SCK_HIGH();
}
}
void LCD_SendByte(unsigned char a)
{
unsigned char i,d;
LCD_CS_HIGH();
LCD_SIO_OUT();
for(i=0;i<8;i++)
{
LCD_SCK_LOW(); //clrbit(LCD_CTRL,E);
d = a&0x80;
if(d)
LCD_SIO_HIGH(); //setbit(LCD_CTRL,RW);
else
LCD_SIO_LOW(); //clrbit(LCD_CTRL,RW);
a<<=1;
LCD_SCK_HIGH(); //setbit(LCD_CTRL,E); //上升弦发送
}
LCD_CS_LOW();
}
