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ee60001's avatar
ee60001
Icon for New Contributor rankNew Contributor
5 years ago

How can I improve jtag to avalon master bridge write speeds through system console?

I am currently using system console to write to various PIO addresses of varying width and I am seeing that it takes system console ~3ms to write to a single mm address before it can start the write ...
SyafieqS's avatar
SyafieqS
Icon for Super Contributor rankSuper Contributor
5 years ago

Hi Sean,


Can you show me how did you see the time result? Any snapshot would be good


ee60001's avatar
ee60001
Icon for New Contributor rankNew Contributor
5 years ago

I just take the number of ticks between commands.

master_write_8 $c_path $a 0x05
set t1 [expr [clock microseconds]]
master_write_32 $c_path $b $addr
set t2 [expr [clock microseconds]]
master_write_32 $c_path $c 0x00000000
set t3 [expr [clock microseconds]]
master_write_8 $c_path $d 0x0001
set t4 [expr [clock microseconds]]
master_write_8 $c_path $e 0x0000
set t5 [expr [clock microseconds]]

puts "[expr $t2-$t1]us"
puts "[expr $t3-$t2]us"
puts "[expr $t4-$t3]us"
puts "[expr $t5-$t4]us"