Hello, I am trying to interface the BBB with an MPU6050 accelerometer/gyroscope.
I am using the i2c-1 bus, with the interrupt connected to an unused pin. I am running kernel version 3.14.57-ti-r78, with the included inv-mpu6050 kernel mode driver. It seems to work well, but when I increase the sampling frequency (FIFO rate) of the IMU, I start getting a lot of i2c errors in dmesg, such as: Mar 7 13:28:16 DL-EM01 kernel: [ 362.893943] omap_i2c 4802a000.i2c: SDA is stuck low, driving 9 pulses on SCL Mar 7 13:28:19 DL-EM01 kernel: [ 365.784033] omap_i2c 4802a000.i2c: SDA is stuck low, driving 9 pulses on SCL Mar 7 13:28:21 DL-EM01 kernel: [ 368.651978] omap_i2c 4802a000.i2c: controller timed out Mar 7 13:28:23 DL-EM01 kernel: [ 369.674012] omap_i2c 4802a000.i2c: SDA is stuck low, driving 9 pulses on SCL Mar 7 13:28:26 DL-EM01 kernel: [ 372.554164] omap_i2c 4802a000.i2c: SDA is stuck low, driving 9 pulses on SCL The BBB usually crashes shortly thereafter. I tried putting the i2c bus into fast-mode via the device tree, but the problem still occurs. If I reduce the sample rate, it happens less often. I don't quite understand what would be causing the entire i2c subsystem to crash? Has anyone had any success with this? I tried writing a userspace driver that simply polls the MPU6050 and it runs fine, albeit without interrupts. Thank you -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/023236b8-e754-4ca3-b172-c3458c687e85%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
