diff options
Diffstat (limited to 'src')
-rw-r--r-- | src/drivers/px4flow/px4flow.cpp | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/src/drivers/px4flow/px4flow.cpp b/src/drivers/px4flow/px4flow.cpp index 60ad3c1af..04aba9eae 100644 --- a/src/drivers/px4flow/px4flow.cpp +++ b/src/drivers/px4flow/px4flow.cpp @@ -249,6 +249,17 @@ out: int PX4FLOW::probe() { + uint8_t val[22]; + + // to be sure this is not a ll40ls Lidar (which can also be on + // 0x42) we check if a 22 byte transfer works from address + // 0. The ll40ls gives an error for that, whereas the flow + // happily returns some data + if (transfer(nullptr, 0, &val[0], 22) != OK) { + return -EIO; + } + + // that worked, so start a measurement cycle return measure(); } |