void hw_close_dac(void)
{
memset(JL_ADDA, 0x0, sizeof(JL_ADDA_TypeDef));
SFR(JL_ADDA->DAA_CON2, 15, 1, 1);
SFR(JL_ADDA->DAA_CON2, 5, 1, 1);
}