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| author | Alexandru M Stan <amstan@chromium.org> | 2014-09-16 12:31:40 -0700 |
|---|---|---|
| committer | chrome-internal-fetch <chrome-internal-fetch@google.com> | 2014-09-23 22:24:42 +0000 |
| commit | 4afee85638257d71600e8ad8c74f0a2d7b35ad0c (patch) | |
| tree | 9e66a9979c03cd1c832b78fcab0f8fa9552ed934 | |
| parent | 45abc9fa62fb8fe015d27c3e27c8fdddd351e338 (diff) | |
| download | chrome-ec-stabilize-6297.B.tar.gz | |
stm32/spi: Print packet on bad datastabilize-6297.B
Just after a bad data error the EC will print the packet(pretty much the whole thing):
in_msg=[02 00 0f 03 f4 09 00 00 ]
I found it very helpful when debugging SPI TX/RX to know what the EC sees.
BUG=chrome-os-partner:31390
TEST=Load spidev and send the EC bytes manually(malformed packets)
BRANCH=None
Change-Id: I037ab909076dc454379040e2e927dc6a0b5c5ea9
Signed-off-by: Alexandru M Stan <amstan@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/218442
Reviewed-by: Alec Berg <alecaberg@chromium.org>
Reviewed-by: Randall Spangler <rspangler@chromium.org>
| -rw-r--r-- | chip/stm32/spi.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/chip/stm32/spi.c b/chip/stm32/spi.c index 2b62a977c0..ccae485e7b 100644 --- a/chip/stm32/spi.c +++ b/chip/stm32/spi.c @@ -22,6 +22,7 @@ /* Console output macros */ #define CPUTS(outstr) cputs(CC_SPI, outstr) #define CPRINTS(format, args...) cprints(CC_SPI, format, ## args) +#define CPRINTF(format, args...) cprintf(CC_SPI, format, ## args) /* DMA channel option */ static const struct dma_option dma_tx_option = { @@ -429,6 +430,7 @@ void spi_event(enum gpio_signal signal) stm32_dma_chan_t *rxdma; uint16_t *nss_reg; uint32_t nss_mask; + uint16_t i; /* If not enabled, ignore glitches on NSS */ if (!enabled) @@ -570,6 +572,11 @@ void spi_event(enum gpio_signal signal) tx_status(EC_SPI_RX_BAD_DATA); state = SPI_STATE_RX_BAD; CPRINTS("SPI rx bad data"); + + CPRINTF("in_msg=["); + for (i = 0; i < dma_bytes_done(rxdma, sizeof(in_msg)); i++) + CPRINTF("%02x ", in_msg[i]); + CPRINTF("]\n"); } static void spi_chipset_startup(void) |