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Hi now I write bytes data (for eg, x00x11x22) from my PC to serial port of my device running unix at the ttyS1 port. I am able to print the data using either

cat /dev/ttyS1

od -x < /dev/ttyS1

both works,
but with cat I get "▒▒" printed.
With od, i see some data bytes:

0000000     00fe

0000001

Which is not what i sent (001122Hex).

How can I get the correct hex display?

EDIT:
tty permission set:

stty -F /dev/ttyS1 speed 115200 cs8 -cstopb -parenb -echo time 3 min 0

tty serial-port busybox hex od

share|improve this question

edited 5 mins ago

GeneCode

asked 42 mins ago

GeneCodeGeneCode

701010 bronze badges

add a comment | 

0

Hi now I write bytes data (for eg, x00x11x22) from my PC to serial port of my device running unix at the ttyS1 port. I am able to print the data using either

cat /dev/ttyS1

od -x < /dev/ttyS1

both works,
but with cat I get "▒▒" printed.
With od, i see some data bytes:

0000000     00fe

0000001

Which is not what i sent (001122Hex).

How can I get the correct hex display?

EDIT:
tty permission set:

stty -F /dev/ttyS1 speed 115200 cs8 -cstopb -parenb -echo time 3 min 0

tty serial-port busybox hex od

share|improve this question

edited 5 mins ago

GeneCode

asked 42 mins ago

GeneCodeGeneCode

701010 bronze badges

add a comment | 

Hi now I write bytes data (for eg, x00x11x22) from my PC to serial port of my device running unix at the ttyS1 port. I am able to print the data using either

cat /dev/ttyS1

od -x < /dev/ttyS1

both works,
but with cat I get "▒▒" printed.
With od, i see some data bytes:

0000000     00fe

0000001

Which is not what i sent (001122Hex).

How can I get the correct hex display?

EDIT:
tty permission set:

stty -F /dev/ttyS1 speed 115200 cs8 -cstopb -parenb -echo time 3 min 0

tty serial-port busybox hex od

share|improve this question

edited 5 mins ago

GeneCode

asked 42 mins ago

GeneCodeGeneCode

701010 bronze badges

cat /dev/ttyS1

od -x < /dev/ttyS1

0000000     00fe

0000001

stty -F /dev/ttyS1 speed 115200 cs8 -cstopb -parenb -echo time 3 min 0

share|improve this question

edited 5 mins ago

GeneCode

asked 42 mins ago

GeneCodeGeneCode

701010 bronze badges

share|improve this question

edited 5 mins ago

GeneCode

asked 42 mins ago

GeneCodeGeneCode

701010 bronze badges

asked 42 mins ago

GeneCodeGeneCode

701010 bronze badges

asked 42 mins ago

GeneCodeGeneCode

701010 bronze badges

1 Answer
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1

od shows that you are just receiving 254 Decimal here, the left par is the "line number".

I think the problem here is how you send the data, or your /dev/ttyS1 permissions, could you develop more on that part ?

Also what do you see if you use xxd -r ?

share|improve this answer

answered 20 mins ago

Ayato_kAyato_k

5611 bronze badge

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Hi. I am aware that left part is "index" or "line number". what I don't get is why I get 00fe, when I am sending a "Hexadecimal packet" of value x00x11x22 from my Windows PC. Also i updated the stty that i used in my question.
  
  – GeneCode
  4 mins ago
  
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Also, if I am sending "x00", nothing is printed by od.
  
  – GeneCode
  2 mins ago
  

  
  
  
  

add a comment | 

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1

od shows that you are just receiving 254 Decimal here, the left par is the "line number".

I think the problem here is how you send the data, or your /dev/ttyS1 permissions, could you develop more on that part ?

Also what do you see if you use xxd -r ?

share|improve this answer

answered 20 mins ago

Ayato_kAyato_k

5611 bronze badge

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Hi. I am aware that left part is "index" or "line number". what I don't get is why I get 00fe, when I am sending a "Hexadecimal packet" of value x00x11x22 from my Windows PC. Also i updated the stty that i used in my question.
  
  – GeneCode
  4 mins ago
  
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Also, if I am sending "x00", nothing is printed by od.
  
  – GeneCode
  2 mins ago
  

  
  
  
  

add a comment | 

1

od shows that you are just receiving 254 Decimal here, the left par is the "line number".

I think the problem here is how you send the data, or your /dev/ttyS1 permissions, could you develop more on that part ?

Also what do you see if you use xxd -r ?

share|improve this answer

answered 20 mins ago

Ayato_kAyato_k

5611 bronze badge

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Hi. I am aware that left part is "index" or "line number". what I don't get is why I get 00fe, when I am sending a "Hexadecimal packet" of value x00x11x22 from my Windows PC. Also i updated the stty that i used in my question.
  
  – GeneCode
  4 mins ago
  
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Also, if I am sending "x00", nothing is printed by od.
  
  – GeneCode
  2 mins ago
  

  
  
  
  

add a comment | 

od shows that you are just receiving 254 Decimal here, the left par is the "line number".

I think the problem here is how you send the data, or your /dev/ttyS1 permissions, could you develop more on that part ?

Also what do you see if you use xxd -r ?

share|improve this answer

answered 20 mins ago

Ayato_kAyato_k

5611 bronze badge

share|improve this answer

answered 20 mins ago

Ayato_kAyato_k

5611 bronze badge

answered 20 mins ago

Ayato_kAyato_k

5611 bronze badge

answered 20 mins ago

Ayato_kAyato_k

5611 bronze badge