drivers/ftdi: warn the user if he tries to use undefined reset signals

[openocd.git] / src / jtag / drivers / ftdi.c

diff --git a/src/jtag/drivers/ftdi.c b/src/jtag/drivers/ftdi.c
index a6070b1120dbafc76892b8cafafd6f1f9d07a468..81b27c26f1bd27ff62e8c2453f7929d068ea084a 100644 (file)
--- a/src/jtag/drivers/ftdi.c
+++ b/src/jtag/drivers/ftdi.c
@@ -472,8 +472,11 @@ static void ftdi_execute_reset(struct jtag_command *cmd)
                tap_set_state(TAP_RESET);
 
        struct signal *trst = find_signal_by_name("nTRST");
                tap_set_state(TAP_RESET);
 
        struct signal *trst = find_signal_by_name("nTRST");

-       if (trst && cmd->cmd.reset->trst == 1) {
-               ftdi_set_signal(trst, '0');
+       if (cmd->cmd.reset->trst == 1) {
+               if (trst)
+                       ftdi_set_signal(trst, '0');
+               else
+                       LOG_ERROR("Can't assert TRST: nTRST signal is not defined");

        } else if (trst && cmd->cmd.reset->trst == 0) {
                if (jtag_get_reset_config() & RESET_TRST_OPEN_DRAIN)
                        ftdi_set_signal(trst, 'z');
        } else if (trst && cmd->cmd.reset->trst == 0) {
                if (jtag_get_reset_config() & RESET_TRST_OPEN_DRAIN)
                        ftdi_set_signal(trst, 'z');


@@ -482,8 +485,11 @@ static void ftdi_execute_reset(struct jtag_command *cmd)
        }
 
        struct signal *srst = find_signal_by_name("nSRST");
        }
 
        struct signal *srst = find_signal_by_name("nSRST");

-       if (srst && cmd->cmd.reset->srst == 1) {
-               ftdi_set_signal(srst, '0');
+       if (cmd->cmd.reset->srst == 1) {
+               if (srst)
+                       ftdi_set_signal(srst, '0');
+               else
+                       LOG_ERROR("Can't assert SRST: nSRST signal is not defined");

        } else if (srst && cmd->cmd.reset->srst == 0) {
                if (jtag_get_reset_config() & RESET_SRST_PUSH_PULL)
                        ftdi_set_signal(srst, '1');
        } else if (srst && cmd->cmd.reset->srst == 0) {
                if (jtag_get_reset_config() & RESET_SRST_PUSH_PULL)
                        ftdi_set_signal(srst, '1');