Subject:
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Re: Serial Communication: HB -> Win95
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Wed, 22 Apr 1998 14:11:01 GMT
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Original-From:
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Douglas Blank <DBLANK@COMPnomorespam.UARK.EDU>
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Viewed:
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455 times
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To answer my own question, at least partially, here is a Win95 Host
program to communicate (single bytes) with the HandyBoard over a serial
line:
/* Win95 Visual C++ Host Code to talk to HandyBoard */
#include <conio.h> // _outp, _inp
#include <stdlib.h> // sleep
#include <stdio.h> // printf
unsigned short PORT = 0x3f8; // COM1: 0x3f8 on my computer
int send(char c) {
return _outp( PORT, c);
}
char receive() {
char retval;
retval = _inp( PORT);
_sleep(50); // this was necessary; too fast a
machine?
retval = _inp( PORT);
return retval;
}
void main(int argc, char *argv[])
{
char c;
char key = ' ';
while (key != 'q') {
key = getch();
send(key);
printf("Sent %c\n", key);
c = receive();
printf("Got %c as a return value\n", c);
}
}
Here is a sample HB program to talk to:
void disable_pcode_serial()
/* necessary to receive characters using serial_getchar */
{
poke(0x3c, 1);
}
void reenable_pcode_serial()
/* necessary for IC to interact with board again */
{
poke(0x3c, 0);
}
/*
======================================================================
For sending and receiving single bytes, you can use Randy's IC code:
*/
void serial_putchar(int c)
{
while (!(peek(0x102e) & 0x80)); /* wait until serial transmit empty
*/
poke(0x102f, c); /* send character */
}
int serial_getchar()
{
while (!(peek(0x102e) & 0x20)); /* wait for received character */
return peek(0x102f);
}
void main(void) {
char c = ' ';
disable_pcode_serial();
while (c != 'q') {
c = serial_getchar();
printf("\nReceived = %c ", c);
if (c == '1') {
serial_putchar(analog(0));
} else if (c == 'a') {
serial_putchar(knob());
}
}
reenable_pcode_serial();
printf("\nHB Mode!");
}
If anyone has a better solution, please let me know.
-Doug Blank
Douglas Blank wrote:
> I am using the serial_putchar() and serial_getchar() communication routines
> on the HandyBoard, and everything is working fine from the PC to the HB.
> However, I am having trouble getting the HB to send data back to the PC.
=====================================================================
dblank@comp.uark.edu Douglas Blank, University of Arkansas
Assistant Professor Computer Science
==================== http://www.uark.edu/~dblank ====================
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Message is in Reply To:
 | | Serial Communication: HB -> Win95
|
| I am using the serial_putchar() and serial_getchar() communication routines on the HandyBoard, and everything is working fine from the PC to the HB. However, I am having trouble getting the HB to send data back to the PC. Here is main() on the HB: (...) (26 years ago, 21-Apr-98, to lugnet.robotics.handyboard)
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