Hi, I'm currently trying to configure and test UART4 on the BBB. So I my point is to connect the two pins and try to communicate with them through minicom. However I haven't any response from the board.
for my dts i'm using this one : https://github.com/victorporof/BeagleBone-SPI-UART/blob/master/BB-UART4-00A0.dts for my configuration : ( for the kernel, I follow this tutoriel : https://eewiki.net/display/linuxonarm/BeagleBone+Black ) # uname -a Linux beagle01 4.1.18-bone20 #4 Fri Mar 18 15:16:19 CET 2016 armv7l GNU/Linux # lsb_release -da No LSB modules are available. Distributor ID: Debian Description: Debian GNU/Linux 8.3 (jessie) Release: 8.3 Codename: jessie # dmesg | grep tty [ 0.000000] Kernel command line: console=ttyO0,115200n8 capemgr. enable_partno=BB-UART4 root=/dev/mmcblk0p1 ro rootfstype=ext4 rootwait [ 0.000298] WARNING: Your 'console=ttyO0' has been replaced by 'ttyS0' [ 3.102953] 44e09000.serial: ttyS0 at MMIO 0x44e09000 (irq = 154, base_baud = 3000000) is a 8250 [ 3.903811] console [ttyS0] enabled [ 6.705576] systemd[1]: Expecting device dev-ttyS0.device... [ 7.174265] systemd[1]: Starting system-getty.slice. [ 7.192955] systemd[1]: Created slice system-getty.slice. [ 7.198476] systemd[1]: Starting system-serial\x2dgetty.slice. [ 7.222958] systemd[1]: Created slice system-serial\x2dgetty.slice. [ 1023.102502] 481aa000.serial: ttyS5 at MMIO 0x481aa000 (irq = 187, base_baud = 3000000) is a 8250 # cat $SLOTS 0: PF---- -1 1: PF---- -1 2: PF---- -1 3: PF---- -1 4: P-O-L- 0 Override Board Name,00A0,Override Manuf,BB-UART4 # ls -l /dev/ttyS* crw------- 1 root tty 4, 64 Mar 22 2016 /dev/ttyS0 crw-rw---- 1 root dialout 4, 65 Sep 7 2015 /dev/ttyS1 crw-rw---- 1 root dialout 4, 66 Sep 7 2015 /dev/ttyS2 crw-rw---- 1 root dialout 4, 67 Sep 7 2015 /dev/ttyS3 crw-rw---- 1 root dialout 4, 68 Sep 7 2015 /dev/ttyS4 crw-rw---- 1 root dialout 4, 69 Mar 22 11:15 /dev/ttyS5 # cat /boot/uEnv.txt uname_r=4.1.18-bone20 optargs=capemgr.enable_partno=BB-UART4 So finally I shorted P9_11 and P9_13 of the BBB and I launch minicom : # minicom -b 9600 -o -D /dev/ttyS5 In addition, here is the configuration of the serial port setup for minicom | A - Serial Device : /dev/ttyS5 | B - Lockfile Location : /var/lock | C - Callin Program : | D - Callout Program : | E - Bps/Par/Bits : 9600 8N1 | F - Hardware Flow Control : No | G - Software Flow Control : No So normally, after all, I sould see an echo on the minicom but nothing. So I didn't really understand why did I do wrong ? Notes : I don't know if it is link but : - I find strange the fact that I configure UART4 but it is ttyS5 which is configure - The minicom stay offline CTRL-A Z for help | 9600 8N1 | NOR | Minicom 2.7 | VT102 | Offline | ttyS5 So if anyone have an Idea. thanks by advance Regards Vincent -- 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.
