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;
}
}
/** Initialise the LCD
*
* Sets up the pins required to communicate with the LCD screen and then does
* the actual chipset initialisation. The pin numbers to use are defined in
* @ref hardware.h.
*/
void lcdInit() {
LCD_SCK_SET_OUTPUT();
LCD_MOSI_SET_OUTPUT();
LCD_CD_SET_OUTPUT();
LCD_SCK_LOW();
LCD_MOSI_LOW();
LCD_CD_LOW();
#if defined(LCD_USE_PROGRAM_RESET)
LCD_RESET_SET_OUTPUT();
LCD_RESET_LOW();
// Do a hard reset on the LCD
waitReset();
//PORTB |= (1 << LCD_RESET);
LCD_RESET_HIGH();
#endif
// Initialise the LCD
lcdCommand(0x21); // LCD Extended Commands.
lcdCommand(0x80|LCD_CONTRAST_VALUE); // Set LCD Vop (Contrast).
lcdCommand(0x04); // Set Temp coefficent.
lcdCommand(0x14); // LCD bias mode 1:48.
lcdCommand(0x20); // LCD Normal commands
lcdCommand(0x08 | 0x04); // Normal display, horizontal addressing
}
/** 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();
}
