Serial parity

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vebryn
Posts: 14
Joined: 16 Dec 2017 02:38

Serial parity

Post by vebryn » 17 Dec 2017 22:43

Hi,

Z-Uno is awesome. I hope I will migrate from Raspberry to Z-Uno.

I'm unavailable to read Serial1 properly. I get following result :

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DEC BIN              BIN     HEX CHAR
252 1111111111111100 1111100 7C  |
252 1111111111111100 1111100 7C  |
248 1111111111111000 1111000 78  x
192 1111111111000000 1000000 40  @
224 1111111111100000 1100000 60  `
254 1111111111111110 1111110 7E  ~
252 1111111111111100 1111100 7C  |
248 1111111111111000 1111000 78  x
My serial is 1200 7E1. I convert 8N1 to 7E1 using 0x7f and.

I'm using this sketch :

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void setup() {
  Serial0.begin(1200);
  Serial.begin(115200);
}

void loop() {
  while(Serial0.available() > 0) {
    int entier = Serial0.read();
    Serial.print(entier);
    Serial.print(' ');
    
    char caractere_8b = entier;
    Serial.print(caractere_8b, BIN);
    Serial.print(' ');
    
    char caractere_7b = caractere_8b & 0x7f;
    Serial.print(caractere_7b, BIN);
    Serial.print(' ');
    
    Serial.print(caractere_7b, HEX);
    Serial.print(' ');
    
    Serial.println(caractere_7b);
  }
  
  delay(2000);
}
On Raspberry, I'm using following command to read 1200 7E1 :

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stty -F /dev/ttyUSB0 1200 sane evenp parenb cs7 -crtscts
I get this result :

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00000030: 0a 4f 50 54 41 52 49 46 20 48 43 2e 2e 20 3c 0a  .OPTARIF HC.. <.
00000040: 0a 49 53 4f 55 53 43 20 33 30 20 39 0a 0a 48 43  .ISOUSC 30 9..HC
00000050: 48 43 20 30 30 37 33 37 35 37 35 35 20 2d 0a 0a  HC 007375755 -..
00000060: 48 43 48 50 20 30 30 34 39 37 38 32 37 39 20 41  HCHP 004978279 A
00000070: 0a 0a 50 54 45 43 20 48 50 2e 2e 20 20 0a 0a 49  ..PTEC HP..  ..I
00000080: 49 4e 53 54 20 30 30 34 20 5b 0a 0a 49 4d 41 58  INST 004 [..IMAX
00000090: 20 30 33 35 20 47 0a 0a 50 41 50 50 20 30 30 39   035 G..PAPP 009
000000a0: 38 30 20 32 0a 0a 48 48 50 48 43 20 44 20 2f 0a  80 2..HHPHC D /.
000000b0: 0a 4d 4f 54 44 45 54 41 54 20 30 30 30 30 30 30  .MOTDETAT 000000
Z-Uno doesn't match Raspberry result. Any idea ?

Sincerely yours.

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