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-rw-r--r--src/jtag/drivers/ft2232.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/src/jtag/drivers/ft2232.c b/src/jtag/drivers/ft2232.c
index 831a5dca..06fc2523 100644
--- a/src/jtag/drivers/ft2232.c
+++ b/src/jtag/drivers/ft2232.c
@@ -2182,6 +2182,11 @@ static int usbjtag_init(void)
}
else if (strcmp(ft2232_layout, "evb_lm3s811") == 0)
{
+ /* There are multiple revisions of LM3S811 eval boards:
+ * - Rev B (and older?) boards have no SWO trace support.
+ * - Rev C boards add ADBUS_6 DBG_ENn and BDBUS_4 SWO_EN;
+ * they should use the "luminary_icdi" layout instead.
+ */
nTRST = 0x0;
nTRSTnOE = 0x00;
nSRST = 0x20;
@@ -2191,6 +2196,9 @@ static int usbjtag_init(void)
}
else if (strcmp(ft2232_layout, "luminary_icdi") == 0)
{
+ /* Most Luminary eval boards support SWO trace output,
+ * and should use this "luminary_icdi" layout.
+ */
nTRST = 0x0;
nTRSTnOE = 0x00;
nSRST = 0x20;