fwflash.c

e1c0df5d-c8bc-48a5-bc02-a2b7c51c0dbf是做mp3的源代码

#include "fwflash.h"

/*******************************************************
* this routine performs a firmware update.
* data structure is as following:
*
* artalb[0]: sectors per cluster
* artalb[2]: # of clusters in file
* artalb[2-5]: (ulong) start of data (lba encoding)
* artalb[6-x]: (uint) cluster containing firmware.bin
*
*******************************************************/

void flash_firmware(void)
{
	register unsigned int i;
	register unsigned char sec;
	unsigned long flashed, ccl;
	unsigned int baddr, pcl, cl;

	cl = artalb[0] | artalb[1] << 8;
	sec = 0; pcl = 0;

	for (flashed = 0; flashed < 0x3b00;)
	{
		ccl = 0;
		for (i = 0; i < secpercluster;i++)
		{
			ccl += cl;
		}
		while (CFReadSector((unsigned long) data + (unsigned long) ccl + sec));

		
		for (i=0; i<4; i++)
		{
			boot_page_erase((unsigned long) flashed);
			
			for (baddr = 0; baddr < 128; baddr+=2)
			{
				boot_page_fill(baddr, secbuf[(i*128)+baddr] | secbuf[(i*128)+baddr+1] << 8);
			}
			boot_page_write((unsigned long) flashed);
			while (boot_rww_busy())
			{
				boot_rww_enable();
			}
			flashed += 128;
		}
		
		sec++;
		if (sec == secpercluster)
		{
			sec = 0;
			pcl += 2;
			cl = artalb[pcl] | (unsigned int) artalb[pcl+1] << 8;
		}
	}
	wdt_enable(1);			// re-enable watchdog
	while (1);
}