Hi, I enabled tscadc in the dts-file and then tried to read the ADC from command line:
ubuntu@arm:/sys/bus/iio/devices/iio:device0$ cat in_voltage* 3961 3581 3933 2233 2272 3400 3187 3816 ubuntu@arm:/sys/bus/iio/devices/iio:device0$ cat in_voltage* 3960 3588 3936 2454 2500 2891 and here it hangs. In dmesg I get every two minutes [ 1680.880664] INFO: task cat:1775 blocked for more than 120 seconds. [ 1680.887475] Not tainted 3.18.4-bone1 #1 [ 1680.892385] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 1680.900979] cat D c05bfe53 0 1775 1690 0x00000001 [ 1680.901090] [<c05bfe53>] (__schedule) from [<c03c8b27>] (am335x_tsc_se_set_once+0x87/0xb8) [ 1680.901188] [<c03c8b27>] (am335x_tsc_se_set_once) from [<bf8184b9>] (tiadc_read_raw+0x84/0x114 [ti_am335x_adc]) [ 1680.901344] [<bf8184b9>] (tiadc_read_raw [ti_am335x_adc]) from [<bf800a1f>] (iio_read_channel_info+0x56/0x5c [industrialio]) [ 1680.901687] [<bf800a1f>] (iio_read_channel_info [industrialio]) from [<c03b31c7>] (dev_attr_show+0x13/0x34) [ 1680.901749] [<c03b31c7>] (dev_attr_show) from [<c0135d4b>] (sysfs_kf_seq_show+0x63/0xa8) [ 1680.901798] [<c0135d4b>] (sysfs_kf_seq_show) from [<c0106c49>] (seq_read+0x125/0x2d8) [ 1680.901846] [<c0106c49>] (seq_read) from [<c00f1bc5>] (vfs_read+0x5d/0x110) [ 1680.901886] [<c00f1bc5>] (vfs_read) from [<c00f20d3>] (SyS_read+0x33/0x70) [ 1680.901933] [<c00f20d3>] (SyS_read) from [<c000d401>] (ret_fast_syscall+0x1/0x44) and I can't kill the "cat" task. Have others encountered this? Are there known issues with the ADC on BBB? I'm using Ubuntu 14.04 with kernel 3.18.4-bone1. -- 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 beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
