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atudb/fw: disable the UART in ATUSB_GPIO

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- board.c (gpio): split GPIO setup and probing
- board.c (gpio): disable the UART while probing GPIOs
This commit is contained in:
Werner Almesberger 2011-06-05 18:27:40 -03:00
parent d1dd611d1e
commit e6f7d85e8a
1 changed files with 22 additions and 9 deletions
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31
atusb/fw/board.c
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@ -172,30 +172,43 @@ int gpio(uint8_t port, uint8_t data, uint8_t dir, uint8_t mask, uint8_t *res)
case 1:
DDRB = (DDRB & ~mask) | dir;
PORTB = (PORTB & ~mask) | data;
_delay_ms(1);
break;
case 2:
DDRC = (DDRC & ~mask) | dir;
PORTC = (PORTC & ~mask) | data;
break;
case 3:
DDRD = (DDRD & ~mask) | dir;
PORTD = (PORTD & ~mask) | data;
break;
default:
return 0;
}
/* disable the UART so that we can meddle with these pins as well. */
UCSR1B = 0;
_delay_ms(1);
switch (port) {
case 1:
res[0] = PINB;
res[1] = PORTB;
res[2] = DDRB;
break;
case 2:
DDRC = (DDRC & ~mask) | dir;
PORTC = (PORTC & ~mask) | data;
_delay_ms(1);
res[0] = PINC;
res[1] = PORTC;
res[2] = DDRC;
break;
case 3:
DDRD = (DDRD & ~mask) | dir;
PORTD = (PORTD & ~mask) | data;
_delay_ms(1);
res[0] = PIND;
res[1] = PORTD;
res[2] = DDRD;
break;
default:
return 0;
}
spi_init();
return 1;
}