LU_FUNCTION_R1
gpx_viper_write(ss, LU_FUNCTION_R1, FULL_SRC_RESOLUTION | LF_SOURCE);
write_ID(adder, LU_FUNCTION_R1, FULL_SRC_RESOLUTION | LF_SOURCE);
write_ID(adder, LU_FUNCTION_R1, FULL_SRC_RESOLUTION | LF_SOURCE);
write_ID(adder, LU_FUNCTION_R1, FULL_SRC_RESOLUTION | LF_SOURCE);