//============================================================================
// 635 Linux Demonstration Code.
// test635,c: Ultra-simple 635 command-line communications example
// Copyright 2005, Crystalfontz America, Inc. Written by Brent A. Crosby
// www.crystalfontz.com, brent@crystalfontz.com
//============================================================================
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <stdlib.h>
#include "typedefs.h"
#include "serial.h"
#include "635_packet.h"
#include "show_packet.h"
//============================================================================
int main(int argc, char* argv[])
{
printf("Ultra-simple CFA-635 command-line communications example.\n");
printf("Crystalfontz America, Inc. http://www.crystalfontz.com\n\n");
printf("Usage:\n");
printf("%s PORT BAUD\n",argv[0]);
printf("PORT is something like \"/dev/ttyS0\" or \"/dev/usb/ttyUSB0\"\n");
printf("BAUD is 19200 or 115200\n");
printf("To clear the display, enter \"clear\" as an optional third parameter\n\n");
//If only 0 or 1 parameter is entered, prompt for the missing parameter(s)
if(argc < 3)
{
printf("\nMISSING A PARAMETER. Enter both PORT and BAUD.\n\n");
return(0);
}
//Check for optional "clear" parameter and set flag if found
int
cleardisplay=0;
if((argc > 3)&&(!strcmp(argv[3],"clear"))) cleardisplay=1;
int
baud;
//default the baud to 115200
if(strcmp(argv[2],"19200"))
baud=115200;
else
baud=19200;
if(Serial_Init(argv[1],baud))
{
printf("Could not open port \"%s\" at \"%d\" baud.\n",argv[1],baud);
return(1);
}
else
printf("\"%s\" opened at \"%d\" baud.\n\n",argv[1],baud);
//For some reason, Linux seems to buffer up data from the LCD, and they are sometimes
//dumped at the start of the program. Clear the serial buffer.
while(BytesAvail())
GetByte();
//Outgoing command packets. Either clear the screen
//or send our line information
//**********************************************
if(cleardisplay)
{
outgoing_response.command = 6;
outgoing_response.data_length = 0;
send_packet();
}
else
{
//Send line 1 to the 635 using command 31
outgoing_response.command = 31;
outgoing_response.data[0]=0; //col
outgoing_response.data[1]=0; //row
memcpy(&outgoing_response.data[2],">>>This is line 1<<<",20);
outgoing_response.data_length = 22; //the col & row position + the 20 char data length
send_packet();
//CFA-635 communications protocol only allows
//one outstanding packet at a time. Wait for the response
//packet from the CFA-635 before sending another
//packet.
int
k;
int
timed_out;
timed_out = 1; //default timed_out is true
for(int k=0;k<=10000;k++)
if(check_for_packet())
{
ShowReceivedPacket();
timed_out = 0; //set timed_out to false
break;
}
if(timed_out)
printf("Timed out waiting for a response.\n");
//Send line 2 to the 635 using command 31
outgoing_response.command = 31;
outgoing_response.data[0]=0; //col
outgoing_response.data[1]=1; //row
memcpy(&outgoing_response.data[2],">>>This is line 2<<<",20);
outgoing_response.data_length = 22;
send_packet();
timed_out = 1; //default timed_out is true
for(int k=0;k<=10000;k++)
if(check_for_packet())
{
ShowReceivedPacket();
timed_out = 0; //set timed_out to false
break;
}
if(timed_out)
printf("Timed out waiting for a response.\n");
//Send line 3 to the 635 using command 31
outgoing_response.command = 31;
outgoing_response.data[0]=0; //col
outgoing_response.data[1]=2; //row
memcpy(&outgoing_response.data[2],">>>This is line 3<<<",20);
outgoing_response.data_length = 22;
send_packet();
timed_out = 1; //default timed_out is true
for(int k=0;k<=10000;k++)
if(check_for_packet())
{
ShowReceivedPacket();
timed_out = 0; //set timed_out to false
break;
}
if(timed_out)
printf("Timed out waiting for a response.\n");
//Send line 4 to the 635 using command 31
outgoing_response.command = 31;
outgoing_response.data[0]=0; //col
outgoing_response.data[1]=3; //row
memcpy(&outgoing_response.data[2],">>>This is line 4<<<",20);
outgoing_response.data_length = 22;
send_packet();
timed_out = 1; //default timed_out is true
for(int k=0;k<=10000;k++)
if(check_for_packet())
{
ShowReceivedPacket();
timed_out = 0; //set timed_out to false
break;
}
if(timed_out)
printf("Timed out waiting for a response.\n");
}
//**********************************************
printf("\nCtrl-C to exit.\n");
printf("Updated display, now waiting for packets\n\n");
while(!cleardisplay)
{
usleep(100000); // 1/10 second
if(check_for_packet())
ShowReceivedPacket();
}
if(cleardisplay) printf("Display Cleared.\n");
printf("Done.\n\n");
Uninit_Serial();
return 0;
}
//============================================================================
