Merge pull request #749 from FlyLu/master

[DeviceDrivers]Fix continuous write page bug for spi_flash_at45dbxx driver

components/drivers/spi/spi_flash_at45dbxx.c

@@ -140,12 +140,12 @@ static rt_size_t AT45DB_flash_read_page_256(rt_device_t dev, rt_off_t pos, void*
 {
     uint32_t index, nr;
     uint8_t * read_buffer = buffer;
+    uint32_t  page = pos;
 
     nr = size;
 
     for (index = 0; index < nr; index++)
     {
-        uint32_t  page = pos;
         uint8_t send_buffer[8];
         uint32_t i;
 
@@ -170,12 +170,12 @@ static rt_size_t AT45DB_flash_read_page_512(rt_device_t dev, rt_off_t pos, void*
 {
     uint32_t index, nr;
     uint8_t * read_buffer = buffer;
+    uint32_t  page = pos;
 
     nr = size;
 
     for (index = 0; index < nr; index++)
     {
-        uint32_t  page = pos;
         uint8_t send_buffer[8];
         uint32_t i;
 
@@ -200,12 +200,12 @@ static rt_size_t AT45DB_flash_read_page_1024(rt_device_t dev, rt_off_t pos, void
 {
     uint32_t index, nr;
     uint8_t * read_buffer = buffer;
+    uint32_t  page = pos;
 
     nr = size;
 
     for (index = 0; index < nr; index++)
     {
-        uint32_t  page = pos;
         uint8_t send_buffer[8];
         uint32_t i;
 
@@ -230,12 +230,12 @@ static rt_size_t AT45DB_flash_write_page_256(rt_device_t dev, rt_off_t pos, cons
 {
     rt_uint32_t index, nr;
     const uint8_t * write_buffer = buffer;
+    uint32_t  page = pos;
 
     nr = size;
 
     for (index = 0; index < nr; index++)
     {
-        uint32_t  page = pos;
         uint8_t send_buffer[4];
 
         send_buffer[0] = AT45DB_MM_PAGE_PROG_THRU_BUFFER1;
@@ -258,12 +258,12 @@ static rt_size_t AT45DB_flash_write_page_512(rt_device_t dev, rt_off_t pos, cons
 {
     rt_uint32_t index, nr;
     const uint8_t * write_buffer = buffer;
+    uint32_t  page = pos;
 
     nr = size;
 
     for (index = 0; index < nr; index++)
     {
-        uint32_t  page = pos;
         uint8_t send_buffer[4];
 
         send_buffer[0] = AT45DB_MM_PAGE_PROG_THRU_BUFFER1;
@@ -286,12 +286,12 @@ static rt_size_t AT45DB_flash_write_page_1024(rt_device_t dev, rt_off_t pos, con
 {
     rt_uint32_t index, nr;
     const uint8_t * write_buffer = buffer;
+    uint32_t  page = pos;
 
     nr = size;
 
     for (index = 0; index < nr; index++)
     {
-        uint32_t  page = pos;
         uint8_t send_buffer[4];
 
         send_buffer[0] = AT45DB_MM_PAGE_PROG_THRU_BUFFER1;