From f338df2abc35f85961aa6266458f94ea2a102b81 Mon Sep 17 00:00:00 2001
From: Leo C
Date: Mon, 18 Aug 2014 23:40:36 +0200
Subject: Command 'go <startaddr>' works now

Add debug command to display AVR RAM
---
 avr/debug.c | 103 ++++++++++++++++++++++++++++++++++++++++++++++--------------
 1 file changed, 80 insertions(+), 23 deletions(-)

(limited to 'avr/debug.c')

diff --git a/avr/debug.c b/avr/debug.c
index 620eb4d..e62869b 100644
--- a/avr/debug.c
+++ b/avr/debug.c
@@ -1,5 +1,6 @@
 #include "common.h"
 #include <stdlib.h>
+#include <string.h>
 #include <ctype.h>
 #include <avr/eeprom.h>
 
@@ -11,6 +12,7 @@
  */
 #ifdef DEBUG
 
+//uint8_t eeprom_read_byte (const uint8_t *__p)
 
 static void print_blanks(uint_fast8_t count)
 {
@@ -18,7 +20,54 @@ static void print_blanks(uint_fast8_t count)
 		putchar(' ');
 }
 
+static uint8_t ram_read_byte(const uint8_t *p)
+{
+	return *p;
+}
 
+void dump_mem(const uint8_t *startaddr, int len, 
+		uint8_t (*readfkt)(const uint8_t *), char *title)
+{
+	uint8_t buf[16];
+	uint8_t llen = 16;
+	uint8_t pre = (size_t) startaddr % 16;
+	const uint8_t *addr = (uint8_t *) ((size_t) startaddr & ~0x0f);
+	len += pre;
+	uint8_t i;
+	
+	if (title && *title)
+		printf_P(PSTR("%s\n"),title);
+		
+	while (len) {
+		if (len < 16)
+			llen = len;
+
+		for (i = pre; i < llen; i++)
+			buf[i] = readfkt(addr + i);
+
+		printf_P(PSTR("%04x:"), addr);
+		for (i = 0; i < llen; i++) {
+			if ((i % 8) == 0)
+				putchar(' ');
+			if (i < pre)
+				printf_P(PSTR(".. "));
+			else
+				printf_P(PSTR("%.2x "), buf[i]);
+		}
+		/* fill line with whitespace for nice ASCII print */
+		print_blanks(3 * (16u - i) + (16u-i)/8 + 1 + pre);
+		/* Print data in ASCII characters */
+		for (i = pre; i < llen; i++)
+			printf_P(PSTR("%c"), isprint(buf[i]) ? buf[i] : '.');
+		putchar('\n');
+
+		pre = 0;
+		addr += 16;
+		len -= llen;
+	}
+}
+
+#if 0
 void dump_ram(const uint8_t *startaddr, int len, char *title)
 {
 	uint8_t llen = 16;
@@ -48,7 +97,8 @@ void dump_ram(const uint8_t *startaddr, int len, char *title)
 		len -= llen;
 	}
 }
-
+#endif
+#if 0
 void dump_heap(void)
 {
 	extern unsigned int __brkval;
@@ -57,9 +107,12 @@ void dump_heap(void)
 		__brkval - (unsigned int) __malloc_heap_start,
 		"=== Heap:");
 }
+#endif
 
+#if 0
 /* TODO: combine with dump_ram() */
-void dump_eep(const uint8_t *addr, unsigned int len)
+void dump_eep(const uint8_t *addr, unsigned int len, 
+			uint8_t (*readfkt)(const uint8_t *))
 {
 	uint_fast8_t i;
 	uint8_t buf[16];
@@ -68,7 +121,7 @@ void dump_eep(const uint8_t *addr, unsigned int len)
 	while (len) {
 		printf_P(PSTR("\n    0x%.4x:"), (unsigned int) addr);
 		for (i = 0; i<16; i++)
-			buf[i] = eeprom_read_byte(addr + i);
+			buf[i] = readfkt(addr + i);
 		for (i = 0; i<16; i++)
 			printf_P(PSTR(" %.2x"), buf[i]);
 		printf_P(PSTR("   "));
@@ -80,39 +133,43 @@ void dump_eep(const uint8_t *addr, unsigned int len)
 	}
 	putchar('\n');
 }
+#endif
+
 
 /*
  * EEPROM Display
  *	md addr {len}
  */
-int do_dump_eep(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+int do_dump_mem(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 {
-	const uint8_t *addr;
-	uint16_t length;
-
-	(void) cmdtp;
-
-
-	/* We use the last specified parameters, unless new ones are
-	 * entered.
-	 */
-	addr = 0;
-	length = 128;
+//	static const uint8_t *addr;
+//	static uint16_t length = 128;
+	uint8_t (*readhow)(const uint8_t *);
+		
+	(void) cmdtp; (void) flag;
 
 	if (argc < 2)
 		return CMD_RET_USAGE;
 
-	if ((flag & CMD_FLAG_REPEAT) == 0) {
-		/* Address is specified since argc > 1 */
-		addr = (const uint8_t *) (size_t) strtoul(argv[1], NULL, 16);
+	const uint8_t *addr;
+	uint16_t length = 128;
+	
+	if (strchr(argv[0],'r') != NULL)
+		readhow = ram_read_byte;
+	else if (strchr(argv[0],'e') != NULL)
+		readhow = eeprom_read_byte;
+	else
+		return CMD_RET_USAGE;
 
-		/* If another parameter, it is the length to display. */
-		if (argc > 2)
-			length = (uint16_t) strtoul(argv[2], NULL, 16);
-	}
+	/* Address is specified since argc > 1 */
+	addr = (const uint8_t *) (size_t) strtoul(argv[1], NULL, 16);
+
+	/* If another parameter, it is the length to display. */
+	if (argc > 2)
+		length = (uint16_t) strtoul(argv[2], NULL, 16);
 
 	/* Print the lines. */
-	dump_eep(addr, length);
+	dump_mem(addr, length, readhow, NULL);
 
 	return 0;
 }
-- 
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