TAS5802: Example of TAS5802 initialization configuration code

Please apply for PPC3 tool for TAS5802 first. The tool can generate the conf data.

Let me know if the OS is Linux or RTOS?

Hi Shenghao,

Thank you for your reply,

The OS is RTOS.

Hi Shenghao,

The customer still has some questions they would like to consult.

System design scheme: The USB of STM32F407zgt6 receives audio files from the PC end, and the I2C3+I2S2 of STM32F407zgt6 drives TAS5802. The audio output has obvious intermittent noise.

Customer requirements:
1. Do you have any solutions to the above problem
2. Can TI provide the C source code for TAS5802 based on STM32 driver
3. The configuration of TAS5802 register in the customer code is as follows. Please help to check if there is any problem

Thank you!

BR~

Hi Shenghao,

The customer currently has sound output, but there may be intermittent popping sounds.

Have the same setting worked on EVM cause same issue?

https://tidrive.ext.ti.com/u/zWVY_JjlWJ7fZVjw/44a3f155-a8d4-46c0-9cb0-73aa25487dc3?l

access code: Lf45.qKK

Pls study the "clock issues_en.pdf" and check every step. And upload the clk waveform and power on/off sequence here. Thanks.

One mre thing, have you reviewed schematics?

Hi Shenghao,

The customer does not have an EVM, they use their own board, and the schematic has not been reviewed. I will ask them to organize it slightly.

Hi Shenghao,

The configuration of TAS5802 register in the customer code is as follows.Sorry, I missed it earlier

/*TAS5802 initialization sequence (consistent with I2S 16 bit)*/
uint8_t init_seq[][2] = {
{0x00, 0x00}, //Option PAGE 0
{0x7F, 0x00}, //Enter register page 0
{0x02, 0x00}, //Modulation mode
{0x03, 0x03},//DSP playback mode
{0x33, 0x00}, // I2S 16bit， Consistent with MCU
{0x54, 0x06}, //Analog gain
{0x4C, volume}, //Left channel volume
{0x4D, volume}, //Right channel volume
{0x78, 0x80}//Clear the fault
};

Have they had the hardware reset before init?

Can you record the pop noise?

According to your issue description, it seemed the sample rate is wrong

Kindly share the waveform measured with scope.

Hi Shenghao,

Sorry for the late reply,

The schematic is as follows.

Audio PA TAS5802.pdf

clk waveform is as follows,The middle channel is data, the upper layer is LRCK, and the lower layer is SCK.

Our expert will review schematic next working day.

As to the clk waveform, I can't find the freq of the LR and bck clk, and the duty cycle of the bck.

Hi Vayne,

the SCH seems fine to me.

and the waveform shows that you are using 1.536Mhz bclk and 48kHz LRclk, please confirm on this.

Br,

Wenbin