#include <string.h>
#include <stdio.h>
#include <stdint.h>
-#include <usb.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <libusb-1.0/libusb.h>
#include <arpa/inet.h>
#include "scope.h"
#include "usbtmc.h"
-#define USB_TIMEOUT 50000
+#define USB_TIMEOUT 10000
+#define USBTMC_IN_TRANSFERSIZE 0x800
+
+#define ID_VENDOR 0x400
+#define ID_PRODUCT 0x5dc
#if BYTE_ORDER == LITTLE_ENDIAN
#define LE32(x) x
#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[2]=(a>>16)&0xff;
- buff[1]=(a>>8)&0xff;
- buff[0]=(a)&0xff;
-}
+/* TODO: fix memory leak here: */
+#define USB_ERROR(s, x) do { if (x < 0) { fprintf(stderr, "usb %s: %s\n", s, usb_strerror(x)); usbtmc_clear(sc); return 0; } } while(0)
+
+/* Not in all libusb-1.0 versions, so we have to roll our own :-( */
+static char * usb_strerror(int e)
+{
+ static char unknerr[256];
-//Helper-routine: Convert an int to little-endian 4-byte word
-unsigned int chars2int(unsigned char *buff) {
- unsigned int a;
- a=buff[3]<<24;
- a+=buff[2]<<16;
- a+=buff[1]<<8;
- a+=buff[0];
- return a;
+ switch (e) {
+ case LIBUSB_SUCCESS:
+ return "Success";
+ case LIBUSB_ERROR_IO:
+ return "Input/output error";
+ case LIBUSB_ERROR_INVALID_PARAM:
+ return "Invalid parameter";
+ case LIBUSB_ERROR_ACCESS:
+ return "Access denied (insufficient permissions)";
+ case LIBUSB_ERROR_NO_DEVICE:
+ return "No such device (it may have been disconnected)";
+ case LIBUSB_ERROR_NOT_FOUND:
+ return "Entity not found";
+ case LIBUSB_ERROR_BUSY:
+ return "Resource busy";
+ case LIBUSB_ERROR_TIMEOUT:
+ return "Operation timed out";
+ case LIBUSB_ERROR_OVERFLOW:
+ return "Overflow";
+ case LIBUSB_ERROR_PIPE:
+ return "Pipe error";
+ case LIBUSB_ERROR_INTERRUPTED:
+ return "System call interrupted (perhaps due to signal)";
+ case LIBUSB_ERROR_NO_MEM:
+ return "Insufficient memory";
+ case LIBUSB_ERROR_NOT_SUPPORTED:
+ return "Operation not supported or unimplemented on this platform";
+ case LIBUSB_ERROR_OTHER:
+ return "Other error";
+ };
+ snprintf(unknerr, sizeof(unknerr), "Unknown error code %d / 0x%02x", e, e);
+ return unknerr;
}
-//This routine locates a scope by VID/PID and returns an opened handle to it.
-static usb_dev_handle *usbtmc_find_scope() {
- struct usb_bus *bus;
- struct usb_device *dev=NULL;
- usb_find_busses();
- usb_find_devices();
- for (bus=usb_busses; bus; bus=bus->next) {
- for (dev=bus->devices; dev; dev=dev->next) {
- //fprintf(stderr,"Prod/dev: %04X:%04X\n",dev->descriptor.idVendor,dev->descriptor.idProduct);
- if (dev->descriptor.idVendor==0x400 && dev->descriptor.idProduct==0x5dc) {
- return usb_open(dev);
+/* This routine locates a scope by VID/PID and returns a struct scope* for it */
+static struct scope* usbtmc_find_scope() {
+ libusb_device_handle *devh = NULL;
+ libusb_device **list;
+ ssize_t cnt;
+ ssize_t i;
+ int err;
+ struct scope *sc;
+
+ cnt = libusb_get_device_list(NULL, &list);
+ if (cnt < 0) {
+ fprintf(stderr, "Can't get USB device list: %d\n", (int)cnt);
+ return NULL;
+ }
+
+ for (i = 0; i < cnt; i++){
+ struct libusb_device_descriptor desc;
+
+ err = libusb_get_device_descriptor(list[i], &desc);
+ if (err)
+ continue;
+
+ if ((desc.idVendor == ID_VENDOR) && (desc.idProduct == ID_PRODUCT)) {
+ libusb_device *dev = list[i];
+
+ err = libusb_open(dev, &devh);
+ if (err) {
+ fprintf(stderr, "Can't open device: %d\n", err);
+ return NULL;
+ }
+
+ sc = calloc(1, sizeof(struct scope));
+ if (sc == NULL) {
+ perror("calloc");
+ exit(EXIT_FAILURE);
}
+
+ sc->usb.dev = devh;
+
+ /* TODO: FIXME */
+ sc->usb.brokenRigol = 1;
+ sc->usb.ep_bulk_out = 0x01;
+ sc->usb.ep_bulk_in = 0x82;
+ sc->usb.wMaxPacketSize_in = 0x40;
+
+ return sc;
}
+
}
+
return NULL;
}
-//Send a scpi-command to the scope. The response goes into the buffer
-//called resp, with a size of resplen. If resp==NULL, no response
-//is requested.
+static unsigned char usb488_status(struct scope *sc)
+{
+ int r;
+ unsigned char status[3];
+
+ sc->usb.bTag++;
+
+ r = libusb_control_transfer(sc->usb.dev, 0xA1,
+ USB488_CTL_READ_STATUS_BYTE,
+ (sc->usb.bTag & 0x7f), 0, status, 3,
+ USB_TIMEOUT);
+
+ if ((r != 3) || (status[0] != USBTMC_STATUS_SUCCESS) || (status[1] != (sc->usb.bTag & 0x7f))) {
+ printf("READ_STATUS_BYTE failed: %d 0x%x 0x%x 0x%x\n", r, status[0], status[1], status[2]);
+ return 0xff;
+ }
+
+ return status[2];
+}
+
+static struct usbtmc_capabilities* usbtmc_get_capabilities(struct scope *sc)
+{
+ int r;
+ static struct usbtmc_capabilities res;
+
+ r = libusb_control_transfer(sc->usb.dev, 0xA1,
+ USBTMC_CTL_GET_CAPABILITIES,
+ 0, 0, (unsigned char*)&res, sizeof(struct usbtmc_capabilities),
+ USB_TIMEOUT);
+ if (r != sizeof(struct usbtmc_capabilities)) {
+ printf("GET_CAPABILITIES failed: %s\n", usb_strerror(r));
+ return NULL;
+ }
+
+ printf("USBTMC Version %02x.%02x Capabilities:\n", res.bcdUSBTMC[0], res.bcdUSBTMC[1]);
+ if (res.USBTMCIFcapabilities & USBTMC_CAP_IF_INDICATOR_PULSE)
+ printf("\tInterface supports indicator pulse\n");
+
+ if (res.USBTMCIFcapabilities & USBTMC_CAP_IF_TALKONLY)
+ printf("\tInterface is talk only\n");
+
+ if (res.USBTMCIFcapabilities & USBTMC_CAP_IF_LISTENONLY)
+ printf("\tInterface is listen only\n");
+
+ if (res.USBTMCDEVcapabilities & USBTMC_CAP_DEV_TERMCHAR_SUPP)
+ printf("\tDevice supports Termchar\n");
+
+ printf("USB488 Version %02x.%02x Capabilities:\n", res.bcdUSB488[0], res.bcdUSB488[1]);
+
+ if (res.USB488IFcapabilities & USB488_CAP_IF_4882)
+ printf("\tInterface is 488.2 compliant\n");
+
+ if (res.USB488IFcapabilities & USB488_CAP_IF_LOCKOUT)
+ printf("\tInterface supports local lockout\n");
+
+ if (res.USB488IFcapabilities & USB488_CAP_IF_TRIGGER)
+ printf("\tInterface supports TRIGGER\n");
+
+ if (res.USB488DEVcapabilities & USB488_CAP_DEV_SCPI)
+ printf("\tDevice is SCPI compliant\n");
+
+ if (res.USB488DEVcapabilities & USB488_CAP_DEV_SR1)
+ printf("\tDevice is SR1 capable\n");
+
+ if (res.USB488DEVcapabilities & USB488_CAP_DEV_RL1)
+ printf("\tDevice is RL1 capable\n");
+
+ if (res.USB488DEVcapabilities & USB488_CAP_DEV_DT1)
+ printf("\tDevice is DT1 capable\n");
+
+ return &res;
+}
+
+void usbtmc_reset(struct scope *sc)
+{
+ libusb_reset_device(sc->usb.dev);
+ usbtmc_claim(sc);
+}
+
+static void usbtmc_clear(struct scope *sc)
+{
+ int r;
+ unsigned char status[2];
+
+ printf("Initiating clear...\n");
+ r = libusb_control_transfer(sc->usb.dev, 0xA1,
+ USBTMC_CTL_INITIATE_CLEAR,
+ 0, 0, status, 1,
+ USB_TIMEOUT);
+
+ if ((r != 1) || status[0] != USBTMC_STATUS_SUCCESS) {
+ printf("INITIATE_CLEAR failed (0x%x): %s\n", status[0], usb_strerror(r));
+ usbtmc_reset(sc);
+ return;
+ }
+
+ while(1) {
+ usleep(100000);
+ printf("Waiting for clear to complete...\n");
+
+ r = libusb_control_transfer(sc->usb.dev, 0xA1,
+ USBTMC_CTL_CHECK_CLEAR_STAT,
+ 0, 0, status, 2,
+ USB_TIMEOUT);
+
+ if (r != 2) {
+ printf("CHECK_CLEAR failed: %s\n", usb_strerror(r));
+ return;
+ }
+
+ if (USBTMC_STATUS_FAIL(status[0])) {
+ printf("CHECK_CLEAR failed: 0x%x\n", status[0]);
+ return;
+ }
+
+ if ((status[0] == USBTMC_STATUS_SUCCESS) && (status[1] == 0)) {
+ printf("Success!\n");
+ break;
+ }
+ }
+}
+
+/*
+ * Send a scpi-command to the scope. The response goes into the buffer
+ * called resp, with a size of resplen. If resp==NULL, no response
+ * is requested.
+ */
int usbtmc_sendscpi(struct scope *sc, char* cmd,
unsigned char *resp, int resplen) {
- unsigned char *buff;
- int len,r,i;
+ int len,r;
+ int err;
int cmdlen = strlen(cmd);
- static unsigned char seq=0;
-
-
- buff=malloc(0x40);
- seq++;
- buff[0]=1; //func
- buff[1]=seq; buff[2]=~seq; //nseq
- buff[3]=0;
- int2chars(buff+4, cmdlen);
- buff[8]=1;
- buff[9]=0x00;
- buff[10]=0x00;
- buff[11]=0x00;
- //fprintf(stderr,"Writing header len=%d\n", cmdlen);
- //printb(buff,12);
- r=usb_bulk_write(sc->usb.dev, 1, (char*)buff, 12, USB_TIMEOUT);
- //fprintf(stderr,"%i bytes written. Writing cmd\n",r);
- //printb(cmd, cmdlen);
- r=usb_bulk_write(sc->usb.dev, 1, cmd, cmdlen, USB_TIMEOUT);
- //fprintf(stderr,"%i bytes written.\n",r);
+ int transferred;
+ struct usbtmc_header *req;
+
+ sc->usb.bTag++;
+
+ len = sizeof(struct usbtmc_header) + cmdlen;
+ if (len%4)
+ len += 4 - (len%4);
+
+ req = calloc(1, len);
+ if (req == NULL) {
+ perror("calloc");
+ exit(EXIT_FAILURE);
+ }
+
+ req->MsgID = USBTMC_DEV_DEP_MSG_OUT;
+ req->bTag = sc->usb.bTag;
+ req->bTagInverse = ~sc->usb.bTag;
+ req->TransferSize = LE32(cmdlen);
+ req->bmTransferAttributes = USBTMC_TRANSFERATTRIB_EOM;
+ memcpy(req->msg, cmd, cmdlen);
+
+ if (sc->usb.brokenRigol) {
+ r=libusb_bulk_transfer(sc->usb.dev, sc->usb.ep_bulk_out,
+ (unsigned char*)req, sizeof(struct usbtmc_header),
+ &transferred,
+ USB_TIMEOUT);
+ USB_ERROR("USBTMC_DEV_DEP_MSG_OUT1", r);
+
+ r=libusb_bulk_transfer(sc->usb.dev, sc->usb.ep_bulk_out,
+ (unsigned char*)&(req->msg), len - sizeof(struct usbtmc_header),
+ &transferred,
+ USB_TIMEOUT);
+ USB_ERROR("USBTMC_DEV_DEP_MSG_OUT2", r);
+ } else {
+ r=libusb_bulk_transfer(sc->usb.dev, sc->usb.ep_bulk_out,
+ (unsigned char*)req, len, &transferred, USB_TIMEOUT);
+ USB_ERROR("USBTMC_DEV_DEP_MSG_OUT", r);
+ }
+
+ free(req);
+
if (resp != NULL && resplen != 0) {
- //send read command
- buff[0]=2; //func
- seq++;
- buff[1]=seq; buff[2]=~seq; //nseq
- int2chars(buff+4,0x40);
- 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(sc->usb.dev, 1, (char*)buff, 12, USB_TIMEOUT);
- //fprintf(stderr,"%i bytes written. Reading response hdr\n",r);
- r=usb_bulk_read(sc->usb.dev, 2, (char*)buff, 0x40, USB_TIMEOUT);
- //printb(buff,r);
- len=chars2int(buff+4);
- //fprintf(stderr,"%i bytes read. Resplen=%i\n",r,len);
- for (i=0; i<(r-12); i++) {
- if (i<resplen) resp[i] = buff[i+12];
+ unsigned char *buff = NULL;
+ unsigned char rxbuff[USBTMC_IN_TRANSFERSIZE];
+ struct usbtmc_header *res;
+ int bytes_read;
+ unsigned int read_size = USBTMC_IN_TRANSFERSIZE;
+ unsigned int headerlen;
+
+ req = calloc(1, sizeof(struct usbtmc_header));
+ if (req == NULL) {
+ perror("calloc");
+ exit(EXIT_FAILURE);
}
- //printb(resp,r-12);
- if (len > 0x40-12) {
- //fprintf(stderr," Reading response:\n");
- if (resplen<len) len=resplen;
- r=usb_bulk_read(sc->usb.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);
+
+ if (sc->usb.brokenRigol == 1) {
+ read_size = sc->usb.wMaxPacketSize_in;
}
- return len;
+
+ bytes_read = 0;
+ do {
+ headerlen = 0;
+
+ if ((sc->usb.brokenRigol == 0) || (bytes_read == 0)) {
+ sc->usb.bTag++;
+
+ req->MsgID = USBTMC_REQUEST_DEV_DEP_MSG_IN;
+ req->bTag = sc->usb.bTag;
+ req->bTagInverse = ~sc->usb.bTag;
+ req->TransferSize = LE32(USBTMC_IN_TRANSFERSIZE);
+ req->bmTransferAttributes = 0;
+ req->TermChar = 0;
+
+ /* send read command */
+ r=libusb_bulk_transfer(sc->usb.dev, sc->usb.ep_bulk_out,
+ (unsigned char*)req, sizeof(struct usbtmc_header), &transferred, USB_TIMEOUT);
+ USB_ERROR("USBTMC_REQUEST_DEV_DEP_MSG_IN", r);
+
+ headerlen = sizeof(struct usbtmc_header);
+ }
+
+ err=libusb_bulk_transfer(sc->usb.dev, sc->usb.ep_bulk_in,
+ (unsigned char*)rxbuff, read_size, &r, USB_TIMEOUT);
+ USB_ERROR("USBTMC_DEV_DEP_MSG_IN", err);
+
+ if (r < headerlen) {
+ fprintf(stderr, "Short read!\n");
+ return 0;
+ }
+
+ if (headerlen > 0) {
+ res = (struct usbtmc_header*)rxbuff;
+
+ if ((res->bTag != sc->usb.bTag) ||
+ (res->bTagInverse != (unsigned char)(~sc->usb.bTag))) {
+ fprintf(stderr, "Wrong TAG received! We: 0x%02x, Scope: 0x%02x\n", sc->usb.bTag, res->bTag);
+ if (sc->usb.brokenRigol == 1) {
+ fprintf(stderr, "Tying to restart transfer...\n");
+ bytes_read = 0;
+ continue;
+ }
+ return 0;
+ }
+
+ if (buff == NULL) {
+ len = LE32(res->TransferSize);
+ buff=malloc(len);
+ if (buff == NULL) {
+ perror("malloc");
+ exit(EXIT_FAILURE);
+ }
+ }
+ }
+
+ if ((r - headerlen) > 0) {
+ memcpy(buff + bytes_read, rxbuff + headerlen, r - headerlen);
+ bytes_read += r - headerlen;
+ }
+
+ read_size = USBTMC_IN_TRANSFERSIZE;
+ } while(bytes_read < len);
+
+ free(req);
+
+ /* TODO: FIXME */
+ if (bytes_read > resplen) {
+ fprintf(stderr, "Response buffer to small: %d instead of %d bytes!\n",
+ resplen, bytes_read);
+ bytes_read = resplen;
+ }
+
+ memcpy(resp, buff, bytes_read);
+ free(buff);
+
+ return bytes_read;
}
return 0;
}
void usbtmc_claim(struct scope *sc)
{
- usb_claim_interface(sc->usb.dev, 0);
+ libusb_claim_interface(sc->usb.dev, 0);
}
void usbtmc_release(struct scope *sc)
{
- usb_release_interface(sc->usb.dev, 0);
+ libusb_release_interface(sc->usb.dev, 0);
}
-//Initialize the scope.
+/* Initialize the scope. */
struct scope* usbtmc_initscope(void) {
int r;
- unsigned char buff[10];
- usb_dev_handle *dev;
+ uint32_t vidpid;
struct scope *sc;
- //Init libusb
- usb_init();
- //Locate and open the scope
- dev = usbtmc_find_scope();
- if (!dev) {
+ /* Init libusb */
+ libusb_init(NULL);
+ /* Locate and open the scope */
+ sc = usbtmc_find_scope();
+ if (!sc) {
return NULL;
}
- sc = calloc(1, sizeof(struct scope));
- if (sc == NULL) {
- perror("calloc");
- exit(EXIT_FAILURE);
- }
-
- sc->usb.dev = dev;
-
usbtmc_claim(sc);
- //The following code isn't really necessary, the program works
- //OK without it too.
- r=usb_control_msg(sc->usb.dev, 0xC8, 9, 0, 0, (char*)buff, 4, USB_TIMEOUT);
+ sc->usb.cap = usbtmc_get_capabilities(sc);
+ printf("Device status: 0x%x\n", usb488_status(sc));
+ /* The following code isn't really necessary, the program works
+ OK without it too. */
+ r=libusb_control_transfer(sc->usb.dev, 0xC8, 9, 0, 0, (unsigned char*)&vidpid, 4, USB_TIMEOUT);
usbtmc_release(sc);
if (r < 0) {
fprintf (stderr, "Error %d sending init message: %s\n",
fprintf (stderr, "Do you have permission on the USB device?\n");
exit (1);
}
- if (chars2int(buff)!=0x40005dc) {
- fprintf(stderr,"Init: buff[%i]=%x\n",r,chars2int(buff));
+ if (LE32(vidpid)!=0x40005dc) {
+ fprintf(stderr,"Init: buff[%i]=%x\n",r,LE32(vidpid));
}
return sc;
}
void usbtmc_close(struct scope *sc)
{
- //Free up and exit
- usb_close(sc->usb.dev);
+ /* Free up and exit */
+ libusb_close(sc->usb.dev);
}
projects / rigol / blobdiff