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fix DFU magic address and linker script 

using the address specified in the linker script leads to a large
output binary (as large as the address specified.
instead the address is now specified in the source file.

Change-Id: I69ad101593e903b74084f179cfc97fccccdfa5a3
This commit is contained in:
Kevin Redon 2019-02-15 00:59:18 +01:00
parent b842918d16
commit 6794b97e21
2 changed files with 3 additions and 9 deletions
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6
gcc/gcc/same54p20a_flash.ld
View File

@ -48,12 +48,6 @@ STACK_SIZE = DEFINED(STACK_SIZE) ? STACK_SIZE : DEFINED(__stack_size__) ? __stac
/* Section Definitions */
SECTIONS
{
/* Location of the DFU magic. The application must set the magic value "DFU!" (e.g. 0x44465521) at this address to force the DFU bootloader to start (e.g. to perform a DFU detach) */
.dfu_magic 0x20000000 :
{
KEEP(*(.dfu_magic)) ;
}
.text :
{
. = ALIGN(4);

6
usb_dfu_main.c
View File

@ -28,7 +28,7 @@
static uint32_t* application_start_address;
/** Location of the DFU magic value to force starting DFU */
static uint32_t dfu_magic __attribute__ ((section (".dfu_magic"))) __attribute__ ((__used__));
static volatile uint32_t* dfu_magic = (uint32_t*)HSRAM_ADDR; // magic value should be written at start of RAM
/** Check if the bootloader is valid
* \return true if the bootloader is valid and can be run
@ -51,8 +51,8 @@ static bool check_bootloader(void)
*/
static bool check_force_dfu(void)
{
if (0x44465521 == dfu_magic) { // check for the magic value which can be set by the main application
dfu_magic = 0; // erase value so we don't stay in the DFU bootloader upon reset
if (0x44465521 == *dfu_magic) { // check for the magic value which can be set by the main application
*dfu_magic = 0; // erase value so we don't stay in the DFU bootloader upon reset
return true;
}
if (0 == gpio_get_pin_level(BUTTON_FORCE_DFU)) { // signal is low when button is pressed