From f80505c9d0275ce56b9d03b01aa96a5ad2ac0b59 Mon Sep 17 00:00:00 2001
From: Jörg Hohensohn <hohensoh@rockbox.org>
Date: Sat, 2 Aug 2003 12:53:57 +0000
Subject: Diagnostic code added, to find init problems (charging, etc.) when
 flashed: the whole I/O space is saved on startup, can be dumped to a file via
 debug menu.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@3912 a1c6a512-1295-4272-9138-f99709370657
---
 apps/debug_menu.c | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

(limited to 'apps/debug_menu.c')

diff --git a/apps/debug_menu.c b/apps/debug_menu.c
index 6df8f2f534..91746d2e58 100644
--- a/apps/debug_menu.c
+++ b/apps/debug_menu.c
@@ -193,6 +193,7 @@ bool dbg_mpeg_thread(void)
 /* Tool function to calculate a CRC16 across some buffer */
 unsigned short crc_16(unsigned char* buf, unsigned len)
 {
+    /* CCITT standard polynomial 0x1021 */
     static const unsigned short crc16_lookup[16] = 
     {   /* lookup table for 4 bits at a time is affordable */
         0x0000, 0x1021, 0x2042, 0x3063, 
@@ -1324,6 +1325,30 @@ bool dbg_save_roms(void)
     return false;
 }
 
+
+/* test code, to be removed later */
+extern union /* defined in main.c */
+{
+    unsigned char  port8 [512];
+    unsigned short port16[256];
+    unsigned       port32[128];
+} startup_io;
+
+bool dbg_save_io(void) /* dump the initial I/O space to disk */
+{
+    int fd;
+
+    fd = creat("/startup_io.bin", O_WRONLY);
+    if(fd >= 0)
+    {
+        write(fd, (void *)&startup_io, sizeof(startup_io));
+        close(fd);
+    }
+    
+    return false;
+}
+/* end of test code */
+
 bool debug_menu(void)
 {
     int m;
@@ -1331,6 +1356,7 @@ bool debug_menu(void)
 
     struct menu_items items[] = {
         { "Dump ROM contents", dbg_save_roms },
+        { "Dump startup I/O", dbg_save_io },
         { "View I/O ports", dbg_ports },
 #ifdef HAVE_LCD_BITMAP
 #ifdef HAVE_RTC
-- 
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