Merge pull request #1433 from tpwrules/faster-jtaguart

Increase JTAG UART upload speed
enjoy-digital · Dec 13, 2023 · cdd80a5 · cdd80a5
2 parents 5dac2fc + 5b52448
commit cdd80a5
Showing 1 changed file with 3 additions and 6 deletions.
diff --git a/litex/build/openocd.py b/litex/build/openocd.py
@@ -144,12 +144,8 @@ def stream(self, port=20000, chain=1):
 
 proc jtagstream_rxtx {tap client is_poll} {
     if {![$client eof]} {
-        if {!$is_poll} {
-            set tx [$client read 1]
-        } else {
-            set tx ""
-        }
-        set rx [jtagstream_drain $tap $tx 64 4096]
+        set tx [$client read 512]
+        set rx [jtagstream_drain $tap $tx 512 4096]
         if {[string length $rx]} {
             #echo [string length $rx]
             $client puts -nonewline $rx
@@ -167,6 +163,7 @@ def stream(self, port=20000, chain=1):
 proc jtagstream_client {tap sock} {
     set client [$sock accept]
     fconfigure $client -buffering none
+    fconfigure $client -blocking 0
     $client readable [list jtagstream_rxtx $tap $client 0]
     $client onexception [list $client close]
     after 1 [list jtagstream_rxtx $tap $client 1]