TI中文支持网Part Number:TLV320AIC3254
The hardware is designed as a Line out differential output, and the configuration code is as follows, but the actual effect is not that the differential signal output, DAC N, P signals do not appear inverted, but are the same. Is there a mistake in the code configuration? What else do I need to configure?
/**************** INOUT CONFIG ***********/
//reg page1, 0x34
audio_ctrl.micpga_left.in1l_micpga = AIC32x4_ROUTED_WITH_10K_RES;
audio_ctrl.micpga_left.in2l_micpga = AIC32x4_ROUTED_WITH_10K_RES;
audio_ctrl.micpga_left.in3l_micpga = AIC32x4_ROUTED_WITH_10K_RES;
audio_ctrl.micpga_left.in1r_micpga = AIC32x4_NOT_ROUTED;
ioctl(s_fdTlv,MICPGA_LEFT_POSITIVE_INPUT , &audio_ctrl);
//reg page1, 0x36
audio_ctrl.micpga_left.in2r_micpga = AIC32x4_NOT_ROUTED;
audio_ctrl.micpga_left.in3r_micpga = AIC32x4_ROUTED_WITH_10K_RES;
audio_ctrl.micpga_left.cm_micpga_via_cm1l = AIC32x4_ROUTED_WITH_10K_RES;
audio_ctrl.micpga_left.cm_micpga_via_cm2l = AIC32x4_ROUTED_WITH_10K_RES;
ioctl(s_fdTlv,MICPGA_LEFT_NEGTIVE_INPUT , &audio_ctrl);
//reg page1, 0x37
audio_ctrl.micpga_right.in1r_micpga = AIC32x4_ROUTED_WITH_10K_RES;
audio_ctrl.micpga_right.in2r_micpga = AIC32x4_ROUTED_WITH_10K_RES;
audio_ctrl.micpga_right.in3r_micpga = AIC32x4_NOT_ROUTED;
audio_ctrl.micpga_right.in2l_micpga = AIC32x4_NOT_ROUTED;
ioctl(s_fdTlv, MICPGA_RIGHT_POSITIVE_INPUT , &audio_ctrl);
//reg page1, 0x39
audio_ctrl.micpga_right.cm_micpga_via_cm1r = AIC32x4_ROUTED_WITH_10K_RES;
audio_ctrl.micpga_right.cm_micpga_via_cm2r = AIC32x4_ROUTED_WITH_10K_RES;
audio_ctrl.micpga_right.in3l_micpga = AIC32x4_NOT_ROUTED;
audio_ctrl.micpga_right.in1l_micpga = AIC32x4_NOT_ROUTED;
ioctl(s_fdTlv, MICPGA_RIGHT_NEGTIVE_INPUT , &audio_ctrl);
/************ LOL/R differential **************/
//LOL ROUTE
audio_ctrl.lo.rdac_lol = 1;
audio_ctrl.lo.ldac_lol = 0;
audio_ctrl.lo.mal_lol = 0;
audio_ctrl.lo.lor_lol = 0;
ioctl(s_fdTlv, LOL_INPUT, &audio_ctrl);
//LOR ROUTE
audio_ctrl.lo.rdac_lor = 1;
audio_ctrl.lo.mar_lor = 0;
ioctl(s_fdTlv, LOR_INPUT, &audio_ctrl);
/************ HPL/R SINGLE ENDED **************/
audio_ctrl.hp.ldac_hpl = 1;
audio_ctrl.hp.in1l_hpl = 0;
audio_ctrl.hp.mal_hpl = 0;
audio_ctrl.hp.mar_hpl = 0;
ioctl(s_fdTlv, HPL_INPUT, &audio_ctrl); audio_ctrl.hp.ldac_hpr = 0;
audio_ctrl.hp.rdac_hpr = 1;
audio_ctrl.hp.in1r_hpr = 0;
audio_ctrl.hp.mar_hpr = 0;
audio_ctrl.hp.hpl_hpr = 0;
ioctl(s_fdTlv, HPR_INPUT, &audio_ctrl);
/******* HPL/R POWER **************/
audio_ctrl.powerup.hpl_power_up = AIC32x4_ENABLE;
ioctl(s_fdTlv, HEADPHONE_LEFT_POWER_UP, &audio_ctrl);
audio_ctrl.powerup.hpr_power_up = AIC32x4_ENABLE;
ioctl(s_fdTlv, HEADPHONE_RIGHT_POWER_UP, &audio_ctrl);
audio_ctrl.powerup.lol_power_up = AIC32x4_ENABLE;
ioctl(s_fdTlv,LINE_OUT_LEFT_POWER_UP , &audio_ctrl);
audio_ctrl.powerup.lor_power_up = AIC32x4_ENABLE;
ioctl(s_fdTlv,LINE_OUT_RIGHT_POWER_UP , &audio_ctrl);
Amy Luo：
您好，
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