The original version of Arnaud Westenberg Linux CAN-bus driver

[lincan.git] / lincan / utils / rxtx.c

diff --git a/lincan/utils/rxtx.c b/lincan/utils/rxtx.c
new file mode 100644 (file)
index 0000000..0adcef1
--- /dev/null
+++ b/lincan/utils/rxtx.c
@@ -0,0 +1,124 @@
+#include <stdio.h>
+#include <string.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/ioctl.h>
+
+#include "../include/can.h"
+#define MAXL 40
+
+int main(void)
+{
+       int i=0, fd=0, ret=0, count=0;
+       char loop=0;
+       char ch, transmission[MAXL+1], specialfile[MAXL+1]="/dev/can0", emptystring[MAXL+1]="", buf[MAXL+1];
+       char remote[MAXL+1];
+       struct canmsg_t message;
+
+       printf("\nThis program allows you to send or receive Can messages.\n");
+       printf("Please answer the following questions:\n\n");
+
+       while ( (*transmission!='s') && (*transmission!='r') ) {
+               printf("Would you like to send or receive a message?\n");
+               printf("send: <s> | receive: <r> ");
+               strcpy(transmission,emptystring);
+               count=0;
+               while ( (ch=getchar()) != '\n' )
+                       transmission[count++]=ch;
+               transmission[count]='\0';
+       }
+
+       while ( *remote!='y' && *remote!='n' ) {
+               printf("Should the message be configured for Remote Transmission Requests?\n");
+               printf("yes: <y> | no: <n> ");
+               strcpy(remote,emptystring);
+               count=0;
+               while ( (ch=getchar()) != '\n' )
+                       remote[count++]=ch;
+               remote[count]='\0';
+       }
+       if (remote[0]=='y')
+               message.flags |= MSG_RTR;
+       else
+               message.flags = 0;
+//     message.flags |= MSG_EXT;  hard code EXT for now
+
+       if (transmission[0]=='s') {
+                       printf("From wich device file would you like to send the message?\n");
+                       printf(specialfile);
+                       *buf='\0';
+                       fgets(buf,MAXL,stdin);
+                       buf[strcspn(buf,"\n")]='\0';
+                       if(*buf)
+                               strncpy(specialfile,buf,MAXL);
+                       specialfile[MAXL]='\0';
+                       specialfile[MAXL]='\0';
+               printf("Enter the Message ID ");
+               scanf("%lx",&message.id);
+               printf("Enter the Message Length ");
+               scanf("%d",&message.length);
+               for (i=0; i<message.length; i++) {
+                       printf("Enter data byte [%d] ",i);
+                       scanf("%x",(int *)&message.data[i]);
+               }
+       }       
+       if (*transmission=='r') {
+                       printf("At which device file would you like to receive the message?\n");
+                       printf(specialfile);
+                       *buf='\0';
+                       fgets(buf,MAXL,stdin);
+                       buf[strcspn(buf,"\n")]='\0';
+                       if(*buf)
+                               strncpy(specialfile,buf,MAXL);
+                       specialfile[MAXL]='\0';
+               printf("Enter the Message ID ");
+               scanf("%ld",&message.id);
+               getchar();
+       }
+
+       fd=open(specialfile,O_RDWR);
+       if (fd<0) {
+               printf("Error opening %s\n",specialfile);
+               return -1;
+       }
+
+       if (transmission[0]=='s') {
+               printf("Press enter to send message\n");
+               getchar();
+               while (getchar() != '\n');
+               ret=write(fd, &message, sizeof(struct canmsg_t));
+               if (ret<0)
+                       printf("Error sending message from %s\n",specialfile);
+               else
+                       printf("Message successfully sent from %s\n",specialfile);
+       }
+
+       if (*transmission=='r') {
+               ioctl(fd,CONF_FILTER,message.id);
+               printf("Press enter to receive message or <l>oop\n");
+               loop = 'l';
+               while ( loop == 'l') {
+                       loop = getchar(); 
+                       ret=read(fd, &message, sizeof(struct canmsg_t));
+                       if (ret<0)
+                               printf("Error receiving message on %s\n",
+                                                               specialfile);
+                       else {
+                               printf("Id      : %lx\n",message.id);
+                               printf("length  : %d\n",message.length);
+                               printf("flags   : 0x%02x\n", message.flags);
+                               printf("time    : %ld\n", message.timestamp);
+                               for (i=0; i<message.length; i++)
+                                       printf("data%d  : %02x\n",i,
+                                                       message.data[i]);
+                       }
+               }
+       }
+
+       if (close(fd)) {
+               printf("Error closing %s\n",specialfile);
+               return -1;
+       }
+
+       return 0;
+}