microwatt

Commit Graph

Author	SHA1	Message	Date
Matt Johnston	3775650df3	dmi_dtm_ecp5: Use ECP5 JTAGG for DMI This uses the JTAGG primitive which is similar to BSCANE2. The LUT4 delay approach came from Florian and Greg in https://github.com/enjoy-digital/litex/pull/1087 Has been tested on an OrangeCrab with 48MHz sysclk FT232H up to 30MHz (though libusb/urjtag is by far the bottleneck vs the JTAG clock) Signed-off-by: Matt Johnston <matt@codeconstruct.com.au>	3 years ago

Author

SHA1

Message

Date

Matt Johnston

3775650df3

dmi_dtm_ecp5: Use ECP5 JTAGG for DMI

This uses the JTAGG primitive which is similar to BSCANE2.
The LUT4 delay approach came from Florian and Greg in
https://github.com/enjoy-digital/litex/pull/1087

Has been tested on an OrangeCrab with 48MHz sysclk
FT232H up to 30MHz (though libusb/urjtag is by far the bottleneck vs
the JTAG clock)

Signed-off-by: Matt Johnston <matt@codeconstruct.com.au>

1 Commits (fcb783a0fb9b52fdffbc2ff49b8e6ceaaadbda3e)