TAS3251: After dumping the current state into a header file, the DRC function cannot function properly.

hi zou

it seems do having problem.

i will contact with our ppc3 team to double confirm this.

tks

jesse

Hi Jesse：

  Thank you! Please provide a solution as soon as possible.

hi zou

i confirmed the script be dumped, DRC parameter seems no problem at myside. only DAC gain having problem.

but your dumped code seems do having problem.

if you are urgent to this, you can take a try this code. i manually modified DAC gain in .h file. DRC parameter also be included.

tks

jesse

/cfs-file/__key/communityserver-discussions-components-files/6/TAS3251_5F00_h_5F00_file_5F00_ti.h

Hi Jesse：

  According to the document you provided, after importing into the development platform, the DRC function still does not work properly. The PPC3 file I uploaded can achieve the limit amplitude target through the DRC function on the EVM board. May I ask what the reason is and is there a better solution?

Hi Haiqing

  Jesse will take some more time to check, get back to you later today. Thanks.

hi

how you initialize the amp with your upper device?

usually, if the config no work might because power up sequence having problem.

Hi Jesse：

After changing the software based on your power on logic, the amplitude limiting function still does not work. This is the software initialization command and. h file, please help confirm if it is correct. Thank you!amp_tas3251.h

hi zou

i am not the pro of the software, but we have the recommendation code for i2c writing.

can it help you?

your initialization seems haven't consider all situation in the cfg code.

also, about the power on logic, have you double confirm the waveform on the hardware that i2s be provided before i2c flash the config? 

/* Example C code */
/*
// Externally implemented function that can write n-bytes to the device
// PCM51xx and TAS5766 targets require the high bit (0x80) of the I2C register to be set on multiple writes.
// Refer to the device data sheet for more information.
extern int i2c_write(unsigned char *data, int n);
// Externally implemented function that delays execution by n milliseconds
extern int delay(int n);
// Example implementation. Call like:
// transmit_registers(registers, sizeof(registers)/sizeof(registers[0]));
void transmit_registers(cfg_reg *r, int n)
{
int i = 0;
while (i < n) {
switch (r[i].command) {
case CFG_META_SWITCH:
// Used in legacy applications. Ignored here.
break;
case CFG_META_DELAY:
delay(r[i].param);
break;
case CFG_META_BURST:
i2c_write((unsigned char *)&r[i+1], r[i].param);
i += (r[i].param + 1)/2;
break;
default:
i2c_write((unsigned char *)&r[i], 2);
break;
}
i++;
}
}
*/

Hi Jesse：

  We have also tried writing code entirely according to cfg code, but the DRC function still did not work. Confirmed that the I2c waveform is correct. Can you please ask an engineer who is more familiar with this chip to help answer this question?

hi zou

comparing you attached file and what i dumpped .h file, it seems you miss some configuration, can you double confirm it?

also, have you double confirm the startup sequence, the i2s should be provided before i2c command be flashed.

if you have captured waveform, please kindly share that.

/cfs-file/__key/communityserver-discussions-components-files/6/0513_5F00_tas3251_5F00_hfile_5F00_TI.h

tks

jesse

Hi Jesse：

We wrote the software according to the file you provided, but the DRC function still cannot work properly.

The attachment is the working timing waveform of I2C and I2S, please help analyze if there are any issues.

amp_tas3251(2024-05-13).h

hi zou

thank you for your confirm.

for your config is working on our tas3151 evm.

how about connecting i2c of evm to your board, and flash command to your chip to see whether drc can work or not.

also, have you try flash the cfg file with our i2c tool on our tas3251 evm as below:

1.click i2c

2.paste tas3251 cfg script to 2.

3 execute click

Hi Jesse：

I will arrange a test to confirm if it can work properly.

HI Jesse：

Select the _stereo 2.0 mode on the speaker configuration and start tuning interface. Select the standard processing_2.0_48k mode on the tuning and audio processing interface. Connect the I2C on the demo board of TAS3251 to the project platform for testing, and the amplitude limiting function is working properly. However, when dumping the current state into a header file, it was found that the DRC settings of the amplifier and the gain of the DAC (set to 7.5dB) were not set correctly in the exported (. h) file. After writing code using the exported (. h) file, the amplitude limiting function did not work properly. The total gain of the machine is also reduced by 7.5dB.
The attachments are the PPC3 document and the H document.
Please help solve this problem, thank you!

TAS3251_Power_amplifier_limiting_adjustment.hTAS3251_Power_amplifier_limiting_adjustment_PPC3.zip

hi zou

about the DAC setting cannot be exported to .h file.

temporarily, you can manually modify that in your .h file, then flashing that to device.

i will push our ppc3 team to modify this ASAP.

tks

jesse

Hi Jesse：

Is there a solution to the DRC function issue?
Why can't I see logs on the I2C monitor interface in my PPC3.