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| author | Andrew Tridgell <tridge@samba.org> | 2013-12-06 20:55:10 +1100 |
|---|---|---|
| committer | Lorenz Meier <lm@inf.ethz.ch> | 2013-12-10 12:05:07 +0100 |
| commit | 0456ee2364600ba6b5a9f109c7464a71579e7d58 (patch) | |
| tree | 4275efa772fdad9c67832b1d289ed071076076eb /src | |
| parent | bc6ddb971fa23b88679ea8201a8205be3c08e90c (diff) | |
| download | px4-firmware-0456ee2364600ba6b5a9f109c7464a71579e7d58.tar.gz px4-firmware-0456ee2364600ba6b5a9f109c7464a71579e7d58.tar.bz2 px4-firmware-0456ee2364600ba6b5a9f109c7464a71579e7d58.zip | |
ms5611: give cleaner SPI traces
this makes logic traces cleaner by zeroing extra bytes written
Diffstat (limited to 'src')
| -rw-r--r-- | src/drivers/ms5611/ms5611_spi.cpp | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/src/drivers/ms5611/ms5611_spi.cpp b/src/drivers/ms5611/ms5611_spi.cpp index 8dd89120d..e9dff5a8b 100644 --- a/src/drivers/ms5611/ms5611_spi.cpp +++ b/src/drivers/ms5611/ms5611_spi.cpp @@ -166,10 +166,9 @@ MS5611_SPI::read(unsigned offset, void *data, unsigned count) uint8_t b[4]; uint32_t w; } *cvt = (_cvt *)data; - uint8_t buf[4]; + uint8_t buf[4] = { 0 | DIR_WRITE, 0, 0, 0 }; /* read the most recent measurement */ - buf[0] = 0 | DIR_WRITE; int ret = _transfer(&buf[0], &buf[0], sizeof(buf)); if (ret == OK) { @@ -240,18 +239,21 @@ MS5611_SPI::_read_prom() for (int i = 0; i < 8; i++) { uint8_t cmd = (ADDR_PROM_SETUP + (i * 2)); _prom.c[i] = _reg16(cmd); + //debug("prom[%u]=0x%x", (unsigned)i, (unsigned)_prom.c[i]); } /* calculate CRC and return success/failure accordingly */ - return ms5611::crc4(&_prom.c[0]) ? OK : -EIO; + int ret = ms5611::crc4(&_prom.c[0]) ? OK : -EIO; + if (ret != OK) { + debug("crc failed"); + } + return ret; } uint16_t MS5611_SPI::_reg16(unsigned reg) { - uint8_t cmd[3]; - - cmd[0] = reg | DIR_READ; + uint8_t cmd[3] = { (uint8_t)(reg | DIR_READ), 0, 0 }; _transfer(cmd, cmd, sizeof(cmd)); |