43 lines
1.0 KiB
C
43 lines
1.0 KiB
C
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#ifndef _MEGA644_H_
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#define _MEGA644_H_
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/* I (M. Thomas) could not find an official Boot-ID
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for the ATmega644 so pretend it's an ATmega64 */
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/* Part-Code ISP */
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#define DEVTYPE_ISP 0x45
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/* Part-Code Boot */
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#define DEVTYPE_BOOT 0x46
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#define SIG_BYTE1 0x1E
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#define SIG_BYTE2 0x96
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#define SIG_BYTE3 0x09
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#define UART_BAUD_HIGH UBRR0H
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#define UART_BAUD_LOW UBRR0L
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#define UART_STATUS UCSR0A
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#define UART_TXREADY UDRE0
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#define UART_RXREADY RXC0
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#define UART_DOUBLE U2X0
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#define UART_CTRL UCSR0B
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#define UART_CTRL_DATA ((1<<TXEN0) | (1<<RXEN0))
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#define UART_CTRL2 UCSR0C
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#define UART_CTRL2_DATA ( (1<<UCSZ01) | (1<<UCSZ00))
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#define UART_DATA UDR0
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#define WDT_OFF_SPECIAL
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static inline void bootloader_wdt_off(void)
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{
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cli();
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wdt_reset();
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/* Clear WDRF in MCUSR */
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MCUSR &= ~(1<<WDRF);
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/* Write logical one to WDCE and WDE */
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/* Keep old prescaler setting to prevent unintentional time-out */
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WDTCSR |= (1<<WDCE) | (1<<WDE);
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/* Turn off WDT */
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WDTCSR = 0x00;
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}
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#endif // #ifndef _MEGA644_H_
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