#include "usbtmc.h"
+#define USB_TIMEOUT 50000
+
+#if BYTE_ORDER == LITTLE_ENDIAN
+#define LE32(x) x
+#elif BYTE_ORDER == BIG_ENDIAN
+#define LE32(x) ((uint32_t)((((uint32_t)x)>>24) | ((((uint32_t)x)>>8) & 0xff00) | ((((uint32_t)x)<<8) & 0xff0000) | (((uint32_t)x)<<24)))
+#else
+#error BYTE_ORDER not defined/known!
+#endif
+
//Helper-routine: Convert a little-endian 4-byte word to an int
static void int2chars(unsigned char *buff,unsigned int a) {
buff[3]=(a>>24)&0xff;
buff[3]=0;
int2chars(buff+4, cmdlen);
buff[8]=1;
- buff[9]=0x37;
- buff[10]=0x39;
- buff[11]=0x39;
+ buff[9]=0x00;
+ buff[10]=0x00;
+ buff[11]=0x00;
//fprintf(stderr,"Writing header len=%d\n", cmdlen);
//printb(buff,12);
- r=usb_bulk_write(dev, 1, (char*)buff, 12, 1000);
+ r=usb_bulk_write(dev, 1, (char*)buff, 12, USB_TIMEOUT);
//fprintf(stderr,"%i bytes written. Writing cmd\n",r);
//printb(cmd, cmdlen);
- r=usb_bulk_write(dev, 1, cmd, cmdlen, 1000);
+ r=usb_bulk_write(dev, 1, cmd, cmdlen, USB_TIMEOUT);
//fprintf(stderr,"%i bytes written.\n",r);
if (resp != NULL && resplen != 0) {
//send read command
seq++;
buff[1]=seq; buff[2]=~seq; //nseq
int2chars(buff+4,0x40);
- buff[8]=1;
+ buff[8]=0;
buff[9]=0xA;
buff[10]=0;
buff[11]=0;
//fprintf(stderr,"Writing resp req header\n");
//printb(buff,12);
- r=usb_bulk_write(dev, 1, (char*)buff, 12, 1000);
+ r=usb_bulk_write(dev, 1, (char*)buff, 12, USB_TIMEOUT);
//fprintf(stderr,"%i bytes written. Reading response hdr\n",r);
- r=usb_bulk_read(dev, 2, (char*)buff, 0x40, 1000);
+ r=usb_bulk_read(dev, 2, (char*)buff, 0x40, USB_TIMEOUT);
//printb(buff,r);
len=chars2int(buff+4);
//fprintf(stderr,"%i bytes read. Resplen=%i\n",r,len);
if (len > 0x40-12) {
//fprintf(stderr," Reading response:\n");
if (resplen<len) len=resplen;
- r=usb_bulk_read(dev, 2, (char*)resp+(0x40-12), len-(0x40-12),1000);
+ r=usb_bulk_read(dev, 2, (char*)resp+(0x40-12), len-(0x40-12), USB_TIMEOUT);
//fprintf(stderr,"%i bytes read, wanted %i.\n", r, len-(0x40-12));
return r+(0x40-12);
}
return 0;
}
+void usbtmc_claim(usb_dev_handle *sc)
+{
+ usb_claim_interface(sc, 0);
+}
+
+void usbtmc_release(usb_dev_handle *sc)
+{
+ usb_release_interface(sc, 0);
+}
+
//Initialize the scope.
usb_dev_handle* usbtmc_initscope(void) {
int r;
//Locate and open the scope
dev = usbtmc_find_scope();
if (!dev) {
- printf("No scope found.\n");
- exit(1);
- } else {
- printf("Scope found.\n");
+ return NULL;
}
- usb_claim_interface(dev,0);
+ usbtmc_claim(dev);
//The following code isn't really necessary, the program works
//OK without it too.
- r=usb_control_msg(dev, 0xC8, 9, 0, 0, (char*)buff, 4, 1000);
+ r=usb_control_msg(dev, 0xC8, 9, 0, 0, (char*)buff, 4, USB_TIMEOUT);
+ usbtmc_release(dev);
if (r < 0) {
fprintf (stderr, "Error %d sending init message: %s\n",
r, strerror (-r));
void usbtmc_close(usb_dev_handle *sc)
{
//Free up and exit
- usb_release_interface(sc,0);
usb_close(sc);
}