diff options
Diffstat (limited to 'src/drivers/rgbled/rgbled.cpp')
| -rw-r--r-- | src/drivers/rgbled/rgbled.cpp | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/src/drivers/rgbled/rgbled.cpp b/src/drivers/rgbled/rgbled.cpp index ea87b37d9..34a45c739 100644 --- a/src/drivers/rgbled/rgbled.cpp +++ b/src/drivers/rgbled/rgbled.cpp @@ -172,7 +172,20 @@ RGBLED::probe() bool on, powersave; uint8_t r, g, b; - ret = get(on, powersave, r, g, b); + /** + this may look strange, but is needed. There is a serial + EEPROM (Microchip-24aa01) on the PX4FMU-v1 that responds to + a bunch of I2C addresses, including the 0x55 used by this + LED device. So we need to do enough operations to be sure + we are talking to the right device. These 3 operations seem + to be enough, as the 3rd one consistently fails if no + RGBLED is on the bus. + */ + if ((ret=get(on, powersave, r, g, b)) != OK || + (ret=send_led_enable(false) != OK) || + (ret=send_led_enable(false) != OK)) { + return ret; + } return ret; } |