Serial Port not working

serial port not working in UDOO neo.
Can any one help to resolve the issue.

 

sudo ./mkudoobuntu.sh udoo-neo desktop

Using above command i was create *.img file and after that i was flashed to SD card.
Inserted to UDOO-NEO board. That time

UART_1_TX 47 UART1_TXD GPIO_4 IOMUXC_SW_MUX_CTL_PAD_GPIO1_IO04 ALT0 - UART1_TX_DATA
UART_1_RX 46 UART1_RXD GPIO_5 IOMUXC_SW_MUX_CTL_PAD_GPIO1_IO05 ALT0 - UART1_RX_DATA

This pins connected to DB9 female connected and female connector. Like below.

<UDOO-NEO> ==> (46,47) <====> DB9 female connector <===> USB-serial cable <====> PC

Cable not problem, it working i was used for other also.

In minicom following configurations i have done: ( same as showed in udoo-doc site)

| A - Serial Device : /dev/ttyUSB0 |
| B - Lockfile Location : /var/lock |
| C - Callin Program : |
| D - Callout Program : |
| E - Bps/Par/Bits : 115200 8N1 |
| F - Hardware Flow Control : No |
| G - Software Flow Control : No |

In Minicom terminal showing all "JUNK VALUES"

This is the problem.
Thanks,
Pavan.

 

Hi Ektor,

Thanks for response.

I have tried two official images, still i am facing same issue. "Junk values" displaying in minicom.
https://www.udoo.org/downloads/ == > below two image collected from this link.
udoobuntu-udoo-neo-desktop_2.3.0.zip
udoobuntu-udoo-neo-minimal_2.3.0.zip

dmesg of serial console after connect.

[20628.388413] usb 2-2: new full-speed USB device number 18 using xhci_hcd
[20628.542764] usb 2-2: New USB device found, idVendor=0403, idProduct=6001
[20628.542768] usb 2-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[20628.542771] usb 2-2: Product: USB Serial Converter
[20628.542773] usb 2-2: Manufacturer: FTDI
[20628.542775] usb 2-2: SerialNumber: FTAJM0V7
[20628.546249] ftdi_sio 2-2:1.0: FTDI USB Serial Device converter detected
[20628.546317] usb 2-2: Detected FT232RL
[20628.546542] usb 2-2: FTDI USB Serial Device converter now attached to ttyUSB0

With other serial cable also tried, same problem in that cable also.

UDOO NEO
UART_1_TX 47 ==> 2 Pin of DB9
UART_1_RX 46 ==> 3 Pin of DB9
GND pin ==> 5 Pin of DB9

Still if any thing wrong in my procedure, please tell me.

Thanks,
Pavan.

 

DB9? Is the same as J7? Uart_1 is on header J7. Also be aware that the pins are 3.3V so your ttl2USB device should be set to 3.3V.
Dus you follow this manual? https://www.udoo.org/docs-neo/Basic_Setup/Serial_Debug_Console.html

 

Thanks for response.

I will try with "cp21x converter", same converter what ever mentioned in weblink

https://www.udoo.org/docs-neo/Basic_Setup/Serial_Debug_Console.html

I will update the result soon.

Thanks,
Pavan.

 

Hi Ek5, waltervl and team,

Thanks a lot .... i have tried with "cp21x converter" same cable. Now it is working fine ... .

 

Hi Team,

How to create own SD card partition and how to write SPL,Uboot to SD card.

While write to SD card i am facing below issue.

Could you please help on this.

Code:

linux$
linux$ lsblk
NAME   MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
sda      8:0    0 465.8G  0 disk
├─sda1   8:1    0  95.4G  0 part /
├─sda2   8:2    0   3.8G  0 part [SWAP]
├─sda3   8:3    0   250G  0 part /media/linux/d3013e39-a19c-402e-8736-0ccd0b2bb896
└─sda4   8:4    0 116.6G  0 part /media/linux/3b7afe20-bab2-406a-8c64-811e78f911e2
sdb      8:16   1   7.5G  0 disk
├─sdb1   8:17   1    32M  0 part /media/linux/boot1
└─sdb2   8:18   1   2.6G  0 part /media/linux/udoobuntu
sr0     11:0    1  1024M  0 rom 
linux$
linux$
linux$
linux$
linux$
linux$ ls
 SPL          u-boot.img             zImage        dts
 System.map 
linux$ sudo dd if=SPL of=/dev/sdb1 seek=1 bs=1k
[sudo] password for linux:
31+0 records in
31+0 records out
31744 bytes (32 kB, 31 KiB) copied, 0.000417137 s, 76.1 MB/s
linux$
linux$
linux$ ls
 SPL          u-boot.img             zImage        dts
 System.map
linux$
linux$ sudo dd if=u-boot.img of=/dev/sdb1 seek=69 bs=1k
230+1 records in
230+1 records out
236260 bytes (236 kB, 231 KiB) copied, 0.00160651 s, 147 MB/s
linux$ sync
linux$
linux$
linux$
ls: cannot access ''$'\022''± 2ε╥'$'\a''ε.Ü_'$'\001': Input/output error
ls: cannot access ''$'\b''╨"f'$'\v''h'$'\f''i.'$'\001''<'$'\r': Input/output error
ls: cannot access ''$'\a''εü?'$'\001''≡.'$'\b''╡ ': Input/output error
ls: cannot access 'ಠ≈m '$'\001''≡.╣² ': Input/output error
ls: cannot access ''$'\003''╤'$'\001'')'$'\024''┐c#.g#┬': Input/output error
ls: cannot access ''$'\032''`,J.ó⌡µ': Input/output error
ls: cannot access 'w └≤'$'\a''0c(.'$'\005''╤ ': Input/output error
ls: cannot access 'pG.'$'\b''╡ ': Input/output error
ls: cannot access '#╨'$'\022''KÜi┬≤.AQ┬': Input/output error
ls: cannot access ''$'\t\003\003''çpgpg.'$'\017''jo': Input/output error
ls: cannot access ''$'\a''╤'$'\002''≡'$'\003\003\006''!.[': Input/output error
ls: cannot access '¿°éç.'$'\001''(s': Input/output error
ls: cannot access 'hfú@'$'\005''Ω'$'\003\001''.ß@'$'\035': Input/output error
ls: cannot access '─≤'$'\002''D'$'\003''⌠.'$'\b''α─': Input/output error
ls: cannot access ''$'\032''o'$'\020''▒B⌠@R.'$'\001''α"': Input/output error
ls: cannot access ''$'\002''(ö┐'$'\030''F.)α'$'\003': Input/output error
ls: cannot access '└≤ü@'$'\002''('$'\017''╨.'$'\003''('$'\022': Input/output error
ls: cannot access '@q!⌠@aög.┘j!': Input/output error
ls: cannot access 'nk'$'\033''h▄ic'$'\006''.'$'\005''╘ ': Input/output error
ls: cannot access '┬≤Aq┬≤┬T.'$'\002'')'$'\020': Input/output error
ls: cannot access '/k.'$'\024''0x': No such file or directory
'¥· !'$'\001''¬.'$'\f''┐'$'\023'                         ''$'\036''H'$'\003''⌐'$'\n''≡Φ■'
''$'\001''.'$'\022''&'                                   '%H'$'\v''≡├ #i.$H'
'▐└¡'$'\v'                                               ''$'\b''╡'$'\b''h'$'\v''≡'$'\002'' .l≥p'
'╔.'$'\003\003''['                                       '-I'$'\033''≡Ä√.∞╨0'
'╛.'$'\024''≡ƒ'                                          ''$'\003''!'$'\032''≡î■'$'\a''f'
'╦■."≡'$'\017'                                           '¬i+`Za.p╜8'
'■≈\■'$'\f'' ■≈.'$'\025''ⁿ'$'\004'                       '#╣'$'\003''i'$'\023''╣.╜Φ°'
''$'\004''≡≡'$'\005\004''≡'$'\017\004''.└≤'$'\a'         'i·'$'\001''≡»·╜Φ.'$'\b''@'$'\f'
''$'\a''╤'$'\002''≡'$'\003\003\006''!.['                  jfrnsfjf.Rnô
''$'\b''╜'                                               'jh╤p.B°'$'\b'
''$'\t''.'$'\002'                                        ''$'\032''`,J.ó⌡µ'
''$'\f''≡┤ⁿ'$'\001''! |.'$'\t''%'$'\021'                 ''$'\001\002\032''`'$'\024''JO⌠.ös'$'\023'
''$'\r'                                                  ''$'\002''J'$'\023''`pG.'$'\004''!á'
''$'\r'                                                  ''\''j'$'\022''α ≈â .&i'$'\a'
''$'\r'                                                  '/k.'$'\024''0x'
''$'\r'                                                  ''$'\027''k.'$'\024''0X'
''$'\r'                                                  'KF'$'\033''hs╡'$'\005''F.'$'\033''l'$'\001'
''$'\r'                                                  '┌`kf[n4j.'$'\032''ak'
''$'\r'                                                  '≤╨'$'\036''K'$'\032''hB≡.'$'\001\002\032'
''$'\020''.,'                                            ''$'\t''k'$'\034''h. h)'
''$'\022''.'$'\037\020'                                  '┌küc┌k'$'\020'':.┌cp'
''$'\035''°.'$'\001''*'$'\001'                           'k■'$'\001''Ü F.!."≡?'
''$'\a''0c('$'\006''╤■≈.ô └'                             '#╨'$'\022''KÜi┬≤.AQ┬'
'■≈╢■└≤'$'\a''0.d('$'\004'                               'l╣'$'\004''6'$'\b''.±╨.°τq'
''$'\a''°└≤'$'\a''0f(.'$'\v''╨ '                          L⌠çç╣CÇç.,
''$'\a''.0f '                                            ''$'\n'' LF ≈╓ⁿ.─°╨'
linux$
linux$
linux$
linux$

After writing SPL and Uboot to SD card, displaying above junk values.

Can you please suggest me, how to write SPL and Uboot.img file to SD card.

Thanks,
Pavan.

 

Please make a new topic for this issue. Personally I have no idea what coused your issue (if it is an issue).
Try another SD card to double check?

 

thanks for reply ..

I have tried with two SD card, with two SD cards i have faced same issue.

Can you please send me in details steps for create SD card.

Then i will try one more time on this.

 

I have never done this so I cannot help you. There is only the documentation but you have found that yourself.

 

Hi Ek5 , i have added [solved], to tag.

Thanks for the information.