TMS320C6748: Boot TMS320C6748 Via External MCU (BootMode : SPI1 Slave)

thongnhh

Prodigy 75 points

Part Number: TMS320C6748

Hi all,

I am using the C6748 DSP.

I want to build an Boot application send DSP program (image) via SP1 Slave.

I try to boot DSP TMS320C6748 from External MCU.

I try to send XMT_START (0x5853) but always received 0xFF (MISO) from C6748.

All signal :

Sorry if this is not the appropiate forum and thanks in advance.

over 7 years ago

0 Cvetolin Shulev-XID over 7 years ago

TI__Guru 65405 points

I've forwarded your query to the experts. Their feedback should be posted here.

BR
Tsvetolin Shulev

0 Yordan Kovachev over 7 years ago

TI__Guru**** 161600 points

What software are you using? Do you follow the recommendations provided here:
processors.wiki.ti.com/.../f1256212648-84085538.html
www.ti.com/.../spraa69d.pdf

Best Regards,
Yordan

0 thongnhh over 7 years ago in reply to Yordan Kovachev

Prodigy 75 points

Yes. I followed the recommendations of Application Report (SPRAAT2F) of C674x.

I want to built a C6748 boot program from another MCU via SPI1 Slave

First Step : I configured Boot Mode of C6748 : BOOT[7:0] 00010011 (SP1 Slave)

Second Step : Reset DSP C748 and Send XMT_START (0x5853) (16bit SPI - Input clock of SPI is 800Khz) but I never received byte from C6748 (always 0xFF) not REC_START.

I captured the signals of MOSI, CLK, CS as shown above.

Thanks !

0 Rahul Prabhu over 7 years ago in reply to thongnhh

TI__Guru** 116020 points

Your bootmode appears to be correct. Have you checked your SPI hook up between SOC aand MCU independent of boot by loading and running program from emulator?

Check the details here:
processors.wiki.ti.com/.../Using_the_D800K001_bootloader_in_SPI_Slave_mode

Note that All multi-word values transmitted by the host should be sent in little-endian order. For instance, the Ping opcode (0x5853590B) is sent as 0x0B, 0x59, 0x53, 0x58 in 8-bit mode or 0x590B, 0x5853 in 16-bit mode. The same applies to responses received from the bootloader.

Let me try and dig some details of scope/protocol analyzer shots to provide as reference and get back to you on this issue.

Regards,
Rahul

0 Rahul Prabhu over 7 years ago in reply to Rahul Prabhu

TI__Guru** 116020 points

I have privately shared the SPI slave boot protocol snapshot for your reference. Please check it out and let us know if you have any questions.

Regards,
Rahul

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TMS320C6748: Boot TMS320C6748 Via External MCU (BootMode : SPI1 Slave)