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firmware/sniffer: Handle USART BREAK condition

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Let's count + report BREAK conditions (all-zero bits + parity + stop
bit)

Change-Id: Idefb552fc9878ca6c88a9bf8bf1c0ced668c5c04
This commit is contained in:
Harald Welte
2022-11-16 21:24:40 +01:00
parent 95c85b6f0c
commit 73a8ef31f1
1 changed files with 9 additions and 1 deletions
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10
firmware/libcommon/source/sniffer.c
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@@ -116,6 +116,7 @@ enum tpdu_sniff_state {
#define RBUF16_F_FRAMING 0x0200
#define RBUF16_F_PARITY 0x0400
#define RBUF16_F_TIMEOUT_WT 0x0800
#define RBUF16_F_BREAK 0x1000
#define RBUF16_F_DATA_BYTE 0x8000
/*------------------------------------------------------------------------------
@@ -865,6 +866,10 @@ void Sniffer_usart_isr(void)
g_stats.num_usart.parity_errs++;
byte |= RBUF16_F_PARITY;
}
if (csr & US_CSR_RXBRK) {
g_stats.num_usart.breaks++;
byte |= RBUF16_F_BREAK;
};
if (csr & (US_CSR_OVRE|US_CSR_FRAME|US_CSR_PARE))
sniff_usart.base->US_CR |= US_CR_RSTSTA;
@@ -944,7 +949,8 @@ void Sniffer_usart0_irq(void)
* Initialization routine
*-----------------------------------------------------------------------------*/
#define SNIFFER_IER (US_IER_RXRDY | US_IER_TIMEOUT | US_IER_OVRE | US_IER_FRAME | US_IER_PARE)
#define SNIFFER_IER (US_IER_RXRDY | US_IER_TIMEOUT | US_IER_OVRE | US_IER_FRAME | US_IER_PARE | \
US_CSR_RXBRK)
/* Called during USB enumeration after device is enumerated by host */
void Sniffer_configure(void)
@@ -1129,6 +1135,8 @@ void Sniffer_run(void)
TRACE_ERROR("USART FRAMING Error\r\n");
if (entry & RBUF16_F_OVERRUN)
TRACE_ERROR("USART OVERRUN Error\r\n");
if (entry & RBUF16_F_BREAK)
TRACE_ERROR("USART BREAK Error\r\n");
}
/* Handle flags */