Michael Fischer spotted a problem in the reset routines for srst_pulls_trst. It is a bit of a mystery why this was only visible w/LPC2148.

Embedded ICE registers are now set up after SRST pulls TRST.

git-svn-id: svn://svn.berlios.de/openocd/trunk@650 b42882b7-edfa-0310-969c-e2dbd0fdcd60

1 files changed, 17 insertions, 0 deletions

diff --git a/src/target/target.c b/src/target/target.c
index 3e9cce5b..d5e4ea56 100644
--- a/src/target/target.c
+++ b/src/target/target.c
@@ -298,6 +298,16 @@ int target_process_reset(struct command_context_s *cmd_ctx)
 	if ((retval = jtag_init_reset(cmd_ctx)) != ERROR_OK)
 		return retval;
 	
+	/* First time this is executed after launching OpenOCD, it will read out 
+	 * the type of CPU, etc. and init Embedded ICE registers in host
+	 * memory. 
+	 * 
+	 * It will also set up ICE registers in the target.
+	 * 
+	 * However, if we assert TRST later, we need to set up the registers again. 
+	 * 
+	 * For the "reset halt/init" case we must only set up the registers here.
+	 */
 	if ((retval = target_examine(cmd_ctx)) != ERROR_OK)
 		return retval;
 	
@@ -384,6 +394,13 @@ int target_process_reset(struct command_context_s *cmd_ctx)
 		target = target->next;
 	}
 	
+	if (jtag_reset_config & RESET_SRST_PULLS_TRST)
+	{
+		/* If TRST was asserted we need to set up registers again */
+		if ((retval = target_examine(cmd_ctx)) != ERROR_OK)
+			return retval;
+	}
+	
 	if ((retval = jtag_execute_queue()) != ERROR_OK)
 	{
 		LOG_WARNING("JTAG communication failed while deasserting reset.");