From 406c884cfee0b8a83c8a47df437366bac142360f Mon Sep 17 00:00:00 2001
From: optixx <david@optixx.org>
Date: Thu, 6 Aug 2009 12:15:04 +0200
Subject: [PATCH] add addr save and restore functions

---
 avr/usbload/sram.c | 17 +++++++++++++++++
 avr/usbload/sram.h |  5 +++++
 2 files changed, 22 insertions(+)

diff --git a/avr/usbload/sram.c b/avr/usbload/sram.c
index 7baf527..29fef20 100644
--- a/avr/usbload/sram.c
+++ b/avr/usbload/sram.c
@@ -31,6 +31,10 @@
 #include "debug.h"
 #include "info.h"
 
+uint32_t addr_current = 0;
+uint32_t addr_stash = 0;
+
+
 void system_init(void)
 {
     /*-------------------------------------------------*/
@@ -113,11 +117,23 @@ void sreg_set(uint32_t addr)
     
 }
 
+inline void sram_bulk_addr_save()
+{
+    addr_stash = addr_current;
+}
+
+inline void sram_bulk_addr_restore()
+{
+    sram_bulk_read_start(addr_stash);
+}
 
 
 void sram_bulk_read_start(uint32_t addr)
 {
     debug(DEBUG_SRAM,"sram_bulk_read_start: addr=0x%08lx\n\r", addr);
+
+    addr_current = addr;
+
     avr_data_in();
 
     AVR_CS_PORT &= ~(1 << AVR_CS_PIN);
@@ -138,6 +154,7 @@ void sram_bulk_read_start(uint32_t addr)
 
 inline void sram_bulk_read_next(void)
 {
+    addr_current++;
     AVR_RD_PORT |= (1 << AVR_RD_PIN);
     counter_up();
     AVR_RD_PORT &= ~(1 << AVR_RD_PIN);
diff --git a/avr/usbload/sram.h b/avr/usbload/sram.h
index d8a6774..7480d98 100644
--- a/avr/usbload/sram.h
+++ b/avr/usbload/sram.h
@@ -204,4 +204,9 @@ void sram_bulk_copy(uint32_t addr, uint8_t * src, uint32_t len);
 void sram_bulk_read_buffer(uint32_t addr, uint8_t * dst, uint32_t len);
 void sram_bulk_set(uint32_t addr, uint32_t len,uint8_t value);
 
+inline void sram_bulk_addr_save();
+inline void sram_bulk_addr_restore();
+
+
+
 #endif