basic transport working, unsorted defines.

[rfid/librfid.git] / gemtag / gemtag.c

diff --git a/gemtag/gemtag.c b/gemtag/gemtag.c
index 19ccc63..c2b24d7 100644 (file)
--- a/gemtag/gemtag.c
+++ b/gemtag/gemtag.c
@@ -24,6 +24,17 @@
 #include <usb.h>
 #include "gemtag.h"
 
+int asciidump(unsigned char *data,int len) {
+       int i;
+
+       for(i=0;i<len;i++)
+               if((data[i]>0x19)&&(data[i]<0x7f)) printf("%c",data[i]);
+               else printf("_");
+       printf("\n");
+
+       return 0;
+}
+
 int hexdump(unsigned char *data,int len) {
        int i;
 
@@ -83,9 +94,8 @@ int gemtag_transcieve(struct gemtag_handle *gh,unsigned char cmd,
        unsigned char rxbuf[256];
        struct gemtag_cmd_hdr *txhdr;
        struct gemtag_cmd_hdr *rxhdr;
-       unsigned char buf[32];
        u_int16_t crc,*crcptr;
-       int ret,size;
+       int i,ret,size,rest;
 
        txhdr=(struct gemtag_cmd_hdr *)txbuf;
        rxhdr=(struct gemtag_cmd_hdr *)rxbuf;
@@ -93,22 +103,25 @@ int gemtag_transcieve(struct gemtag_handle *gh,unsigned char cmd,
        txhdr->start=0xa5;
        txhdr->seq=++(gh->seq);
        txhdr->cmd=cmd;
-       txhdr->len=(tx_len>>8)|(tx_len<<8);
+       txhdr->len=tx_len;
        size=sizeof(struct gemtag_cmd_hdr);
        memcpy(txbuf+size,tx,tx_len);
        size+=tx_len;
 
        /* crc check */
-       if(gh->capabilities&GEMTAG_CAP_CRC) {
+       if(gh->caps&GEMTAG_CAP_CRC) {
                crcptr=(u_int16_t *)(txbuf+size);
                crc=gemtag_calc_crc(txbuf,size);
-               *crcptr=(crc>>8)|(crc<<8);
+               //*crcptr=(crc>>8)|(crc<<8);
+               *crcptr=crc;
                size+=2;
        }
 
        /* usb write */
-       printf("(%02d) -> ",size);
-       hexdump(txbuf,size);
+       if(gh->caps&GEMTAG_CAP_VERB_TRANSMIT) {
+               printf("(%02d) -> ",size);
+               hexdump(txbuf,size);
+       }
        ret=usb_interrupt_write(gh->handle,0x02,txbuf,size,0);
        if(ret<=0) {
                perror("usb interrupt write");
@@ -116,35 +129,53 @@ int gemtag_transcieve(struct gemtag_handle *gh,unsigned char cmd,
        }
 
        /* usb read */
-       ret=usb_interrupt_read(gh->handle,0x81,buf,32,0);
+       ret=usb_interrupt_read(gh->handle,0x81,rxbuf,32,0);
        if(ret<=0) {
                perror("usb interrupt read");
                return ret;
        }
-       memcpy(rxbuf,buf,ret);
-       printf("(%02d) <- ",ret);
-       hexdump(rxbuf,ret);
+       if(ret<5) {
+               if(gh->caps&GEMTAG_CAP_VERB_TRANSMIT)
+                       printf("short answer (%d)\n",ret);
+               return -SHORT_ANSWER;
+       }
 
-       *rx_len=buf[3]|(buf[4]<<8);
-       printf("debug: length according to header -> %d 0x%04x\n",
-              *rx_len,*rx_len);
-       size=*rx_len+5;
+       *rx_len=rxbuf[3]|(rxbuf[4]<<8);
+       size=*rx_len+sizeof(struct gemtag_cmd_hdr); 
+       if(gh->caps&GEMTAG_CAP_CRC) size+=2;
+
+       i=1;
+       rest=size-ret;
+       while(rest>=0) {
+               ret=usb_interrupt_read(gh->handle,0x81,rxbuf+i*32,32,0);
+               if(ret<=0) {
+                       perror("usb interrupt read (missing bytes)");
+                       return ret;
+               }
+               i++;
+               rest-=ret;
+       }
+
+       if(gh->caps&GEMTAG_CAP_VERB_TRANSMIT) {
+               printf("(%02d) <- ",size);
+               hexdump(rxbuf,size);
+       }
 
        /* crc check */
-       if(gh->capabilities&GEMTAG_CAP_CRC) {
-               size=ret-2;
+       if(gh->caps&GEMTAG_CAP_CRC) {
+               size-=2;
                crcptr=(u_int16_t *)(rxbuf+size);
                crc=gemtag_calc_crc(rxbuf,size);
                if(((crc>>8)!=rxbuf[size+1])||((crc&0xff)!=rxbuf[size])) {
                        printf("bad crc! (%04x)\n",crc);
-                       //return -BAD_CRC;
+                       return -BAD_CRC;
                }
        }
 
        /* check sequence number */     
        if(rxhdr->seq!=txhdr->seq) {
                puts("transmitted/recieved sequence number do not match");
-               //return -SEQ_MISMATCH;
+               return -SEQ_MISMATCH;
        }
 
        memcpy(rx,rxbuf+sizeof(struct gemtag_cmd_hdr),*rx_len);
@@ -154,13 +185,10 @@ int gemtag_transcieve(struct gemtag_handle *gh,unsigned char cmd,
 
 struct gemtag_handle *gemtag_open(void) {
        struct usb_device *gemtag;
-       unsigned char rbuf[256];
-       unsigned int i,rlen;
+       unsigned int i;
        struct gemtag_handle *gh;
        char info[64];
 
-       rlen=sizeof(rbuf);
-
        usb_init();
        usb_find_busses();
        usb_find_devices();
@@ -200,26 +228,64 @@ struct gemtag_handle *gemtag_open(void) {
                perror("set alt interface");
        printf("activated alt setting 0\n");
 
-       gh->capabilities|=GEMTAG_CAP_CRC;
-
-       gemtag_transcieve(gh,GEMTAG_CMD_GET_FW_VERSION,
-                         NULL,0,rbuf,&rlen);
-       gemtag_transcieve(gh,GEMTAG_CMD_GET_SERIAL_NUMBER,
-                         NULL,0,rbuf,&rlen);
-
        return gh;
 
 out_free:
        free(gh);
        return NULL;
 }
+
+int gemtag_close(struct gemtag_handle *gh) {
+
+       if(gh->handle) usb_close(gh->handle);
+       if(gh) free(gh);
+
+       return 0;
+}
+
        
 int main(int argc, char **argv) {
 
        struct gemtag_handle *gh;
+       unsigned char buf[256];
+       unsigned int buflen;
 
        gh=gemtag_open();
 
+       gh->caps|=GEMTAG_CAP_CRC;
+       gh->caps|=GEMTAG_CAP_VERB_TRANSMIT;
+
+       printf("Device:\n");
+       gemtag_transcieve(gh,GEMTAG_CMD_GET_FW_VERSION,
+                         NULL,0,buf,&buflen);
+       asciidump(buf,buflen);
+       printf("\n");
+
+       printf("Serial Number:\n");
+       gemtag_transcieve(gh,GEMTAG_CMD_GET_SERIAL_NUMBER,
+                         NULL,0,buf,&buflen);
+       printf("Snr: %d (%04x)\n",buf[1]<<8|buf[0],buf[1]<<8|buf[0]);
+       printf("\n");
+
+       printf("RC632 Version:\n");
+       gemtag_transcieve(gh,GEMTAG_CMD_GET_RIC_VERSION,
+                         NULL,0,buf,&buflen);
+       printf("\n");
+
+       printf("Switching off the LED!\n");
+       buf[0]=GEMTAG_LED_OFF;
+       gemtag_transcieve(gh,GEMTAG_CMD_SWITCH_LED,
+                         buf,1,buf,&buflen);
+       printf("\n");
+
+       printf("Detecting Card ...\n");
+       gemtag_transcieve(gh,GEMTAG_CMD_DETECT_CARD,
+                         NULL,0,buf,&buflen);
+       asciidump(buf,buflen);
+       printf("\n");
+
+       gemtag_close(gh);
+
        return 1;
 }