/** 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
}
bool OneWireSlave::waitForRequest(bool ignore_errors) {
errno = ONEWIRE_NO_ERROR;
for (;;) {
if (!waitReset(0) )
continue;
if (!presence() )
continue;
if (recvAndProcessCmd() )
return TRUE;
else if ((errno == ONEWIRE_NO_ERROR) || ignore_errors)
continue;
else
return FALSE;
}
}
bool OneWireSlave::waitReset() {
return waitReset(1000);
}
