diff target-utils/libcommon/cmd_r16.c @ 13:f4fc449a64ea

target-utils libcommon infrastructure for interactive commands
author Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
date Fri, 03 May 2013 06:42:03 +0000
parents
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/target-utils/libcommon/cmd_r16.c	Fri May 03 06:42:03 2013 +0000
@@ -0,0 +1,26 @@
+/*
+ * r16 hexaddr -- read a 16-bit register or memory location
+ */
+
+#include <sys/types.h>
+#include "types.h"
+
+void
+cmd_r16(argbulk)
+	char *argbulk;
+{
+	char *argv[2];
+	u_long addr;
+
+	if (parse_args(argbulk, 1, 1, argv, 0) < 0)
+		return;
+	if (parse_hexarg(argv[0], 8, &addr) < 0) {
+		printf("ERROR: argument must be a valid 32-bit hex address\n");
+		return;
+	}
+	if (addr & 1) {
+		printf("ERROR: unaligned address\n");
+		return;
+	}
+	printf("%04X\n", *(volatile u16 *)addr);
+}