11 years, 7 months ago.

Strange character when sending data to VT100 terminal

Hello, I am trying to create 5 boxes, and have a string in each box, below is the code that I have written to carry out this function. However my code has some sort of bug, I can send one string on its own and the box is created perfectly, with no errors, however as soon as I try to send more than one box, I get extended ascii character 200, even if I don't include the box in the code. If anybody can see my error, it would be greatly appreciated.

1. include "mbed.h"
2. include "Terminal.h"

Terminal S0(USBTX, USBRX);

void serial(char value[],unsigned int y); the ints a,b,c,d,e are used for the location of the extended ascii characters and the location of the text.

unsigned int a = 0; unsigned int b = 4; unsigned int c = 8; unsigned int d = 12; unsigned int e = 16;

value is the string I wish to send to the terminal.

char value[19];

int main()

{ S0.cls();

serial("1:PWM 1 : 50 %",a); serial("2:PWM 2 : 20 %",b); serial("3:PWM 3 : 30 %",c); serial("4:PWM 4 : 60 %",d); serial("5: 5 KHz Frequency",e);

}

void serial(char value[], unsigned int y) { int j; S0.locate(0,y); S0.putc(201);

j=y+1; k=y+2;

S0.locate(1,j); S0.printf("%s",value);

for (int x=1; x<25; x++) { S0.locate(x,y); S0.putc(205);

}

S0.locate(25,y); S0.putc(187);

for( int f = j; f < k; f++ ) { S0.locate(25,f); S0.putc(186); vertical }

S0.locate(25,k); S0.putc(188);

for( int g = 24; g>0; g ) { S0.locate(g,k); S0.putc(205); }

S0.locate(0,k); S0.putc(200);

for( int h = j; h <k; h++ ) { S0.locate(0,h); S0.putc(186); } }