REQTYPE_DEVICE_TO_HOST
req_type = REQTYPE_DEVICE_TO_HOST;
result = cp210x_read_vendor_block(serial, REQTYPE_DEVICE_TO_HOST,
result = cp210x_read_vendor_block(serial, REQTYPE_DEVICE_TO_HOST,
result = cp210x_read_vendor_block(serial, REQTYPE_DEVICE_TO_HOST,
result = cp210x_read_vendor_block(serial, REQTYPE_DEVICE_TO_HOST,
REQTYPE_DEVICE_TO_HOST,
CP210X_VENDOR_SPECIFIC, REQTYPE_DEVICE_TO_HOST,
ret = cp210x_read_vendor_block(serial, REQTYPE_DEVICE_TO_HOST, value,
ret = cp210x_read_vendor_block(serial, REQTYPE_DEVICE_TO_HOST,