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spi-hdlc-adapter: Make interrupt pin active low and add additional logging. (#293)

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This commit is contained in:
Robert Quattlebaum
2016-07-27 23:26:55 -07:00
committed by Jonathan Hui
parent d1dcccfabb
commit 9c0ddf8dda
1 changed files with 33 additions and 3 deletions
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tools/spi-hdlc-adapter/spi-hdlc-adapter.c
+33 -3
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@@ -96,7 +96,12 @@ enum {
/* ------------------------------------------------------------------------- */
/* MARK: Global State */
#if HAVE_OPENPTY
static int gMode = MODE_PTY;
#else
static int gMode = MODE_STDIO;
#endif
static const char* gSpiDevPath = NULL;
static const char* gIntGpioDevPath = NULL;
static const char* gResGpioDevPath = NULL;
@@ -293,9 +298,29 @@ static uint16_t spi_header_get_data_len(uint8_t *header)
return ( header[3] + (header[4] << 8) );
}
static void debug_spi_header(const char* hint)
{
syslog(LOG_DEBUG, "%s: TX-HEADER: %02X %02X %02X %02X %02X\n",
hint,
gSpiTxFrameBuffer[0],
gSpiTxFrameBuffer[1],
gSpiTxFrameBuffer[2],
gSpiTxFrameBuffer[3],
gSpiTxFrameBuffer[4]
);
static int push_pull_spi()
{
syslog(LOG_DEBUG, "%s: RX-HEADER: %02X %02X %02X %02X %02X\n",
hint,
gSpiRxFrameBuffer[0],
gSpiRxFrameBuffer[1],
gSpiRxFrameBuffer[2],
gSpiRxFrameBuffer[3],
gSpiRxFrameBuffer[4]
);
}
static int push_pull_spi(void)
{
int ret;
uint16_t slave_max_rx;
uint16_t slave_data_len;
@@ -317,6 +342,8 @@ static int push_pull_spi()
goto bail;
}
debug_spi_header("push_pull_1");
if (gSpiRxFrameBuffer[0] == 0xFF)
{
// Device is off or in a bad state.
@@ -378,6 +405,8 @@ static int push_pull_spi()
goto bail;
}
debug_spi_header("push_pull_2");
if (gSpiRxFrameBuffer[0] == 0xFF)
{
// Device is off or in a bad state.
@@ -427,7 +456,8 @@ static bool check_and_clear_interrupt(void)
gRet = EXIT_FAILURE;
}
return 0 != atoi(value);
// The interrupt pin is active low.
return 1 != atoi(value);
}
/* ------------------------------------------------------------------------- */