TPS65987DDJ: TPS65987DDJ 4CC command error

Youssef Rouhou

Part Number: TPS65987DDJ

I'm using TPS65987DDH and I interface it with I2c with an external processor

the I2C communication works

I read the version and the boot flags registers, but something not right!!
the version register : 0x4, 0x0, 0x12, 0x7 ->0x04001207 -->400.12.7 (is it correct ??)

the boot flags : byte1:0xc, 0xfc, 0x0, 0x0, 0x0, 0xa2, 0x6, 0x0, 0x0, 0x30, 0x0, 0x0

I have problem with the 4CC command I always get 0x04 in the first byte

read reg 0x03 --> b'\x04APP '

read reg 0x04 --> b'\x04\x00\x00\x00\x00' (should be b'\x04I2C ' ) and it does not recognise any 4CC command

write 'GSkC' to 0x08 --> read 0x08 --> b'\x04!CMD'

write 'GSrC' to 0x08 --> read 0x08 --> b'\x04!CMD'

write 'Gaid' to 0x08 --> read 0x08 --> b'\x04!CMD'

write 'PTCs' to 0x08 --> read 0x08 --> b'\x04!CMD'

write 'FLrr' to 0x08 --> read 0x08 --> b'\x04!CMD' there is no 4CC command with valid response

I can't load Patch Bundle

Did I miss something to make the 4CC command works?

over 4 years ago

0 Emma Hoying over 4 years ago

TI__Genius 9630 points

Hello,

Could you attach logs of the errors you are seeing?

Thanks,

Emma

0 Youssef Rouhou over 4 years ago in reply to Emma Hoying

Prodigy 40 points

Hello
I'm using TPS65987DDJ on custom board not on the EVM

Q1: I got from the version register 0x0F --> 0x4, 0x0, 0x12, 0x7 --> 400.12.7 or 712.0.4
is the version I have is correct ?

Q2:I always get in the first byte 0x04 in the 4CC command response
reg 0x03 --> 0x04, 'A' , 'P' , 'P ' , ' '

reg 0x04 --> 0x04,0,0,0,0
write 'GSkC' to 0x08 --> read 0x08 --> 0x04, '!', 'C' , 'M' , 'D'

write 'Gaid' to 0x08 --> read 0x08 --> 0x04, '!', 'C' , 'M' , 'D'

write 'PTCs' to 0x08 --> read 0x08 --> 0x04, '!', 'C' , 'M' , 'D'

write 'FLrr' to 0x08 --> read 0x08 --> 0x04, '!', 'C' , 'M' , 'D'

is there any reason why the 4CC commands are recognized?

0 Emma Hoying over 4 years ago in reply to Youssef Rouhou

TI__Genius 9630 points

Hello,

Which GUI are you using to generate your firmware?

Thanks,

Emma

0 Youssef Rouhou over 4 years ago in reply to Emma Hoying

Prodigy 40 points

Hello

I'm not using GUI, I'm using a microcontroller with I2C communication (I2C1) to interface the TPS65987DDJ.

Youssef

0 Emma Hoying over 4 years ago in reply to Youssef Rouhou

TI__Genius 9630 points

Hi Youssef,

Are you using a firmware base image? Or are you updating all the registers manually through the microcontroller? I am trying to determine how you have created your patch that you are pushing to the PD controller.

Thanks,

Emma

0 Youssef Rouhou over 4 years ago in reply to Emma Hoying

Prodigy 40 points

Hi Emma

I'm updating all registers manually through the microcontroller

thanks,

Youssef

0 Emma Hoying over 4 years ago in reply to Youssef Rouhou

TI__Genius 9630 points

Hi Youssef,

You will need to create a patch using the GUI, as there is information in the patch outside of register values. You will need to download the proper GUI from the TPS65987DDJ page. Please let me know once you have done this and I will provide more detailed documentation for programming over I2C.

Thanks,

Emma

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TPS65987DDJ: TPS65987DDJ 4CC command error