Re: [beagleboard] UART4 not working - configuration kernel version 4.1.18

2016-03-22 Thread Le Costaouec Vincent 


Le mardi 22 mars 2016 14:28:48 UTC+1, RobertCNelson a écrit :
>
> On Tue, Mar 22, 2016 at 5:40 AM, Le Costaouec Vincent 
>  wrote: 
> > 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
>  
>
> Well you have the pin's for uart4, but you've utilized uart5..  (this 
> worked in 3.8.x as the uart# was wrong.) 
>
> In v4.1.x: use 
>
> target = <>; 
>
> for uart4... 
>
> Regards, 
>
> -- 
> Robert Nelson 
> https://rcn-ee.com/

I have try that and it works. So now I had a better understanding of the 
uart dts
Thanks a lot.

Regards,

Vincent
 

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Re: [beagleboard] UART4 not working - configuration kernel version 4.1.18

2016-03-22 Thread Robert Nelson 
On Tue, Mar 22, 2016 at 5:40 AM, Le Costaouec Vincent
 wrote:
> 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

Well you have the pin's for uart4, but you've utilized uart5..  (this
worked in 3.8.x as the uart# was wrong.)

In v4.1.x: use

target = <>;

for uart4...

Regards,

-- 
Robert Nelson
https://rcn-ee.com/

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[beagleboard] UART4 not working - configuration kernel version 4.1.18

2016-03-22 Thread Le Costaouec Vincent 
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
[0.00] 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 = 300) 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 = 300) 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


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