diff --git a/src/jtag/drivers/stlink_usb.c b/src/jtag/drivers/stlink_usb.c index 047de52f1..1f3fbe2cd 100644 --- a/src/jtag/drivers/stlink_usb.c +++ b/src/jtag/drivers/stlink_usb.c @@ -990,7 +990,7 @@ static int stlink_configure_target_trace_port(void *handle) goto out; /* select the pin protocol. The STLinkv2 only supports asynchronous * UART emulation (NRZ) mode, so that's what we pick. */ - res = stlink_usb_write_debug_reg(handle, TPI_SPPR, 0b10); + res = stlink_usb_write_debug_reg(handle, TPI_SPPR, 0x02); if (res != ERROR_OK) goto out; /* disable continuous formatting */