diff options
| author | Harald Welte <laforge@gnumonks.org> | 2011-08-15 22:59:24 +0200 |
|---|---|---|
| committer | Harald Welte <laforge@gnumonks.org> | 2011-08-15 22:59:24 +0200 |
| commit | fa7297b93f4187bce9439bb676874815f66d8f21 (patch) | |
| tree | ba948f98e97c0e2d2f3fa36137f4c8148c79ab49 | |
| parent | a6d972c23dc7160331a4495011a73199eca59a9f (diff) | |
SIMTRACE UART: Reset error status on error related IRQ
This prevents an IRQ-flood after a parity or overrun error, which
in turn would cause a watchdog reset.
| -rw-r--r-- | firmware/src/simtrace/iso7816_uart.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/firmware/src/simtrace/iso7816_uart.c b/firmware/src/simtrace/iso7816_uart.c index 67f8e0d..f30977a 100644 --- a/firmware/src/simtrace/iso7816_uart.c +++ b/firmware/src/simtrace/iso7816_uart.c @@ -530,7 +530,16 @@ static __ramfunc void usart_irq(void) } if (csr & (AT91C_US_PARE|AT91C_US_FRAME|AT91C_US_OVRE)) { + u_int8_t nb_err = usart->US_NER; /* FIXME: some error has occurrerd */ + //DEBUGP("NER=%02x ", nb_err); + /* clear the status */ + usart->US_CR |= AT91C_US_RSTSTA; + } + + if (csr & AT91C_US_INACK) { + /* we would have sent a NACK if INACK was not set */ + usart->US_CR |= AT91C_US_RSTNACK; } } |