Diagnostics tweaks for jtag_examine_chain() failure paths.

git-svn-id: svn://svn.berlios.de/openocd/trunk@2760 b42882b7-edfa-0310-969c-e2dbd0fdcd60

diff --git a/src/jtag/core.c b/src/jtag/core.c
index b1d3ca0f1abb107b0aa1d4067ed7b83b79fe9151..ff9f3e0ff3ad802b0776ae3c7b7367a0c708fff1 100644 (file)
--- a/src/jtag/core.c
+++ b/src/jtag/core.c
@@ -885,8 +885,9 @@ static bool jtag_examine_chain_check(uint8_t *idcodes, unsigned count)
         * the scan is not valid */
        if (zero_check == 0x00 || one_check == 0xff)
        {
-               LOG_ERROR("JTAG communication failure: check connection, "
-                       "JTAG interface, target power etc.");
+               LOG_ERROR("JTAG scan chain interrogation failed: all %s",
+                               (zero_check == 0x00) ? "zeroes" : "ones");
+               LOG_ERROR("Check JTAG interface, timings, target power, etc.");
                return false;
        }
        return true;
@@ -1238,7 +1239,7 @@ static int jtag_init_inner(struct command_context_s *cmd_ctx)
        /* examine chain first, as this could discover the real chain layout */
        if (jtag_examine_chain() != ERROR_OK)
        {
-               LOG_ERROR("trying to validate configured JTAG chain anyway...");
+               LOG_ERROR("Trying to use configured scan chain anyway...");
        }
 
        if (jtag_validate_ircapture() != ERROR_OK)