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SAM3U-EK: Add a 'dfu' makefile target, DFU boot switching code

This commit is contained in:
Harald Welte 2012-01-08 17:14:16 +01:00
parent 49600087b9
commit 5729b6faa3
3 changed files with 37 additions and 2 deletions
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4
boards/at91sam3u-ek/board.h
View File

@ -689,7 +689,9 @@ typedef enum IRQn
// DFU
#define BOARD_USB_DFU
#define BOARD_DFU_PAGE_SIZE 8192
#define BOARD_DFU_BTN_PIOA 18
#define BOARD_DFU_BOOT_SIZE (16 * 1024)
#define BOARD_DFU_PAGE_SIZE 512
#define BOARD_DFU_NUM_IF 4
#define BOARD_USB_VENDOR 0x16c0

2
boards/at91sam3u-ek/board.mak
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@ -28,4 +28,4 @@
# Defines which are the available memory targets for the AT91SAM3UE-EK board.
MEMORIES = sram flash psram
MEMORIES = sram flash psram dfu

33
boards/at91sam3u-ek/board_cstartup_gnu.c
View File

@ -33,6 +33,7 @@
#include "board.h"
#include "exceptions.h"
#include "board_lowlevel.h"
#include <core_cm3.h>
//------------------------------------------------------------------------------
// External Variables
@ -121,6 +122,18 @@ IntFunc exception_table[] = {
IrqHandlerNotUsed // 30 not used
};
#if defined(BOARD_USB_DFU) && !defined(dfu)
static void BootIntoApp(void)
{
unsigned int *pSrc;
void (*appReset)(void);
pSrc = (unsigned int *) ((unsigned char *)AT91C_IFLASH0 + BOARD_DFU_BOOT_SIZE);
AT91C_BASE_NVIC->NVIC_VTOFFR = ((unsigned int)(pSrc)) | (0x0 << 7);
appReset = pSrc[1];
appReset();
}
#endif
//------------------------------------------------------------------------------
/// This is the code that gets called on processor reset. To initialize the
@ -131,6 +144,24 @@ void ResetException(void)
unsigned int *pSrc, *pDest;
LowLevelInit();
#if defined(BOARD_USB_DFU) && !defined(dfu)
#ifdef BOARD_DFU_BTN_PIOA
/* There is a PIO button that can be used to enter DFU */
AT91C_BASE_PMC->PMC_PCER = 1 << AT91C_ID_PIOA;
AT91C_BASE_PIOA->PIO_PPUER = (1 << BOARD_DFU_BTN_PIOA);
AT91C_BASE_PIOA->PIO_ODR = (1 << BOARD_DFU_BTN_PIOA);
AT91C_BASE_PIOA->PIO_PER = (1 << BOARD_DFU_BTN_PIOA);
if (AT91C_BASE_PIOA->PIO_PDSR & (1 << BOARD_DFU_BTN_PIOA) &&
#else /* BOARD_DFU_BTN_PIOA */
if (1 &&
#endif /* BOARD_DFU_BTN_PIOA */
(unsigned long *)AT91C_IRAM != 0xDFDFDFDF) {
BootIntoApp();
}
#endif
#if defined(psram)
pDest = &_vect_start;
pSrc = &_svectorrelocate;
@ -162,6 +193,8 @@ void ResetException(void)
#endif
AT91C_BASE_NVIC->NVIC_VTOFFR = ((unsigned int)(pSrc)) | (0x0 << 7);
/* APP should have disabled interrupts during the transition */
__enable_irq();
main();
}