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Fix USB ctrl transfer number
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@ -245,7 +245,7 @@ int main (int argc, char **argv)
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int frame_size = (fb->width*fb->height*fb->bpp);
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/* request frame */
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ret = libusb_control_transfer(dev, 0xC1, 8, 0, 2, NULL, 0, TIMEOUT);
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ret = libusb_control_transfer(dev, 0xC1, 1, 0, 2, NULL, 0, TIMEOUT);
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if (ret !=0) {
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fprintf(stderr, "I/O error: %s (%d) offset: %d\n", err_str(ret), ret, len);
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exit(0);
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