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-rw-r--r--src/jtag/ft2232.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/src/jtag/ft2232.c b/src/jtag/ft2232.c
index 3cc552d7..f0047d31 100644
--- a/src/jtag/ft2232.c
+++ b/src/jtag/ft2232.c
@@ -273,6 +273,11 @@ int ft2232_speed_div(int speed, int *khz)
int ft2232_khz(int khz, int *jtag_speed)
{
+ if (khz==0)
+ {
+ LOG_ERROR("RCLK not supported");
+ return ERROR_FAIL;
+ }
/* Take a look in the FT2232 manual,
* AN2232C-01 Command Processor for
* MPSSE and MCU Host Bus. Chapter 3.8