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Silence a false positive warning.

This commit is contained in:
Markus Hitter 2013-09-28 01:45:19 +02:00
parent af12c7a68a
commit e7b7e004f4
1 changed files with 7 additions and 1 deletions
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8
serial.c
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@ -105,6 +105,8 @@ void serial_init()
/// receive interrupt
///
/// we have received a character, stuff it in the rx buffer if we can, or drop it if we can't
// Using the pragma inside the function is incompatible with Arduinos' gcc.
#pragma GCC diagnostic ignored "-Wunused-but-set-variable"
#ifdef USART_RX_vect
ISR(USART_RX_vect)
#else
@ -117,9 +119,12 @@ ISR(USART0_RX_vect)
if (buf_canwrite(rx))
buf_push(rx, UDR0);
else {
// Not reading the character makes the interrupt logic to swamp us with
// retries, so better read it and throw it away.
// #pragma GCC diagnostic ignored "-Wunused-but-set-variable"
uint8_t trash;
// #pragma GCC diagnostic pop
// not reading the character makes the interrupt logic to swamp us with retries, so better read it and throw it away
trash = UDR0;
}
@ -137,6 +142,7 @@ ISR(USART0_RX_vect)
MEMORY_BARRIER();
SREG = sreg_save;
}
#pragma GCC diagnostic pop
/// transmit buffer ready interrupt
///