imx6 read emmc via JTAG

[Alex_Smart]

I was looking for solution for reading/witing eemc contents with JTAG interface, and no luck so far. There are several similar topics without an answer

https://community.nxp.com/t5/i-MX-Processors/eMMC-programming-with-JTAG-interface-iMX-6SX/m-p/137414...

Here they are usung u-boot

https://community.nxp.com/t5/i-MX-Processors-Knowledge-Base/Bring-up-i-MX6-via-JTAG/ta-p/1124954

[Alejandro_Salas]

Hello @Alex_Smart 

I hope you are doing very well.

Unfortunately, the JTAG interface is not designed to do what you need/want. 

NXP provides a solution to flash the eMMC thorough UUU tool. Also, you can use this UUU tool with SDP/fastboot to communicate partitions of any device on the board (SD/eMMC).

Best regards!

Salas.

[Alex_Smart]

Well thats weird. Im new to this particular CPU, how do you guys debug code on eMMC? What IDE are you using?

[Alejandro_Salas]

Hello @Alex_Smart 

You can refer to:

https://sysprogs.com/VisualKernel/tutorials/imx6/jtag/

https://wiki.voipac.com/index.php?title=iMX6_Rex_Basic_JTAG_On-Chip_Debugging

Best regards,

Salas.

[Alex_Smart]

I see. So in that case Linux uploaded via ssh. I have a several questions if its nit too much trouble:

Is it possible to write some kind of microcode, load it to RAM and perform read/write operations in emmc?
Is it possible to read eFuse via JTAG?

Is it possible to read emmc via uuu tool?