fs20pcs utility using libusb to send FS20 commands from the command line

diff --git a/.gitignore b/.gitignore
new file mode 100644 (file)
index 0000000..e607cf0
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+fs20pcs.o
+fs20pcs

diff --git a/Makefile b/Makefile
new file mode 100644 (file)
index 0000000..14f37d5
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,10 @@
+CFLAGS=-O2 -Wall -I/opt/local/include -g
+LDFLAGS=-L/opt/local/lib -lusb-1.0
+CC=gcc
+
+all: fs20pcs
+
+fs20pcs: fs20pcs.o
+
+clean:
+       rm -f fs20pcs.o fs20pcs

diff --git a/fs20pcs.c b/fs20pcs.c
new file mode 100644 (file)
index 0000000..8bc28c7
--- /dev/null
+++ b/fs20pcs.c
@@ -0,0 +1,165 @@
+#include <string.h>
+#include <stdio.h>
+#include <stdint.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <libusb-1.0/libusb.h>
+
+#define USB_TIMEOUT            10000
+
+#define ID_VENDOR      0x18ef
+#define ID_PRODUCT     0xe015
+
+/* Not in all libusb-1.0 versions, so we have to roll our own :-( */
+static char * usb_strerror(int e)
+{
+       static char unknerr[256];
+
+       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;
+}
+
+libusb_device_handle *fs20pcs_find() {
+       libusb_device_handle *devh = NULL;
+       libusb_device **list;
+       ssize_t cnt;
+       ssize_t i;
+       int err;
+
+       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: %s\n", usb_strerror(err));
+                               return NULL;
+                       }
+
+                       err = libusb_detach_kernel_driver(devh, 0);
+                       if ((err != 0) && (err != LIBUSB_ERROR_NOT_FOUND)) {
+                               fprintf(stderr, "Can't detach kernel driver: %s\n", usb_strerror(err));
+                               return NULL;
+                       }
+
+                       err = libusb_claim_interface(devh, 0);
+                       if ((err != 0)) {
+                               fprintf(stderr, "Can't claim interface: %s\n", usb_strerror(err));
+                               return NULL;
+                       }
+
+                       return devh;
+               }
+
+       }
+
+       return NULL;
+}
+
+int fs20pcs_send(libusb_device_handle *devh, unsigned char* send_data)
+{
+       unsigned char recv_data[5] = {0x00, 0x00, 0x00, 0x00, 0x00};
+       int err;
+       int cnt;
+       int i;
+
+       err = libusb_interrupt_transfer(devh, 0x01, send_data, 11, &cnt, 5000);
+       if (err) {
+               fprintf(stderr, "Can't send data: %s\n", usb_strerror(err));
+               return 0;
+       }
+
+       err = libusb_interrupt_transfer(devh, 0x81, recv_data, sizeof(recv_data), &cnt, 5000);
+       if (err) {
+               fprintf(stderr, "Can't receive data: %s\n", usb_strerror(err));
+               return 0;
+       }
+
+       for (i = 0; i < cnt; i++) {
+               printf("0x%02x ", recv_data[i]);
+       }
+       printf("\n");
+
+       return 1;
+}
+
+int main(int argc, char **argv)
+{
+       unsigned char send_data[11];
+       libusb_device_handle *devh = NULL;
+       int err;
+       int i;
+
+       if ((argc < 2) || (argc > 12)) {
+               fprintf(stderr, "Invalid number of parameters!\n");
+               return EXIT_FAILURE;
+       }
+
+       memset(send_data, 0, sizeof(send_data));
+       for (i = 0; i < argc - 1; i++) {
+               send_data[i] = strtoul(argv[i+1], NULL, 16);
+       }
+
+       err = libusb_init(NULL);
+       if (err != 0) {
+               fprintf(stderr, "Can't initialize libusb: %s\n", usb_strerror(err));
+               return EXIT_FAILURE;
+       }
+
+       devh = fs20pcs_find();
+       if (!devh) {
+               fprintf(stderr, "Can't find/open fs20pcs!\n");
+               return EXIT_FAILURE;
+       }
+
+       if (fs20pcs_send(devh, send_data) == 0) {
+               fprintf(stderr, "Can't communicate with fs20pcs!\n");
+               return EXIT_FAILURE;
+       }
+
+       libusb_close(NULL);
+
+       return EXIT_SUCCESS;
+}