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Code Activity

atusb/fw/: added "lazy enabling" of UART-SPI after ATUSB_GPIO

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- spi.h (spi_off), spi.c: disable the UART
- spi.c (spi_initialized, spi_begin, spi_init): initialize the UART
  if necessary
- board_app.c (gpio): call spi_off to disable the UART instead of
  open-coding the operation
- board_app.c (gpio): don't explicitly re-enable the UART but defer it
  to the next communication
This commit is contained in:
Werner Almesberger
2011-06-09 14:02:26 -03:00
parent 814cf6fd78
commit ec7c93789a
3 changed files with 16 additions and 3 deletions
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4
atusb/fw/board_app.c
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@@ -94,7 +94,7 @@ int gpio(uint8_t port, uint8_t data, uint8_t dir, uint8_t mask, uint8_t *res)
}
/* disable the UART so that we can meddle with these pins as well. */
UCSR1B = 0;
spi_off();
_delay_ms(1);
switch (port) {
@@ -115,7 +115,5 @@ int gpio(uint8_t port, uint8_t data, uint8_t dir, uint8_t mask, uint8_t *res)
break;
}
spi_init();
return 1;
}