无意中想起前一段时间在优酷上放了个关于mdk调试ro base的设置，上去优酷"巡查"了一翻.看到竟然有一个评价心里乐滋滋的总算有一个同学给于我肯定!so昨天写 mirco2440移植u-boot-1.1.6 （一）写到一点也觉得没啥所谓了...因为我得到肯定!
?
??????? 费话小说,这个教程目的也很明确:让我们的uboot识别出Nor Flash(mirco 2440上的Nor Flash 是SST VF1601 2MB)并能对Nor Flash进行写操作!(未识别出Nor Flash uboot 并不能对Nor Flash进行写操作).当然我们这是在uboot能在mirco 2440跑起来的基础(跑不起来的可参考http://blog.163.com/ds_liang/blog/static/1619822122010511114351608/?)上做进行的.
1)很不幸uboot-1.1.6不支持SST V1601芯片,我们必须自己写相关的函数(幸好board/dave开发板中有相关代码我们复制过来做一点修改就行了)
$ cp board/dave/common/flash.c board/ds_liang2440/flash.c
$ vi board/dave/B2/flash.c
把 board/dave/B2/flash.c 中的unsigned long flash_init (void)函数拷贝到board/ds_liang2440/flash.c文件的最后,把条件编译去掉
??
????????? dest2[i] = data2[i];
??????????? /* re-enable interrupts if necessary */
??????????? if (flag)
????????????? enable_interrupts();
??????????? /* data polling for D7 */
??????????? start = get_timer (0);
??????????? while ((dest2[i] & (CFG_FLASH_WORD_SIZE)0x00800080) !=
?????????????????? (data2[i] & (CFG_FLASH_WORD_SIZE)0x00800080)) {
????????????? if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
??????????????? return (1);
????????????? }
??????????? }
????????? }
??????? return (0);
}
/*-----------------------------------------------------------------------
?*/
unsigned long flash_init (void)
{
// #ifdef __DEBUG_START_FROM_SRAM__
//?????? return CFG_DUMMY_FLASH_SIZE;
//#else
??????? unsigned long size_b0;
??????? int i;
??????? /* Init: no FLASHes known */
??????? for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
??????????????? flash_info[i].flash_id = FLASH_UNKNOWN;
??????? }
??????? /* Static FLASH Bank configuration here - FIXME XXX */
??????? size_b0 = flash_get_size((vu_long *)CFG_FLASH_BASE,&flash_info[0]);
??????? if (flash_info[0].flash_id == FLASH_UNKNOWN) {
??????????????? printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MBn",
??????????????????????? size_b0,size_b0<<20);
??????? }
??????? /* Setup offsets */
??????? flash_get_offsets (0,&flash_info[0]);
??????? /* Monitor protection ON by default */
??????? (void)flash_protect(FLAG_PROTECT_SET,
??????????????????????????? -CFG_MONITOR_LEN,
??????????????????????????? 0xffffffff,
??????????????????????????? &flash_info[0]);
??????? flash_info[0].size = size_b0;
??????? return (size_b0);
// #endif
}
?
2)因为本来uboot默认使用amd_lv400,我们把它去了加上SST VF1601的配置
$ vi include/configs/ds_liang2440.h
令:
#define CONFIG_AMD_LV400??????? 1?????? /* uncomment this if you have a LV400 flash */
#if 0
#define CONFIG_AMD_LV800??????? 1?????? /* uncomment this if you have a LV800 flash */
#endif
为:
#define CONFIG_SST_VF160??????? 1??????
?
#ifdef? CONFIG_SST_VF160
#define PHYS_FLAHS_SIZE?????? ??0x00200000
#define CFG_MAX_FLASH_SECT????? (32)
#define CFG_ENV_ADDR??????????? (CFG_FLASH_BASE + 0x030000)
#define FLASH_BANK_SIZE???????? 0x01000000
#define CFG_FLASH_ADDR0???????? 0x5555
#define CFG_FLASH_ADDR1???????? 0x2AAA
#define CFG_FLASH_WORD_SIZE???? unsigned short
#define CFG_FLASH_READ0???????? 0x0000
#define CFG_FLASH_READ1???????? 0x0001
#define CFG_FLASH_READ2???????? 0x0002
#define CFG_MONITOR_LEN???????? (256*1024)
#define CFG_MONITOR_BASE??????? TEXT_BASE
#endif
#if 0
#define CONFIG_AMD_LV400??????? 1?????? /* uncomment this if you have a LV400 flash */
#define CONFIG_AMD_LV800??????? 1?????? /* uncomment this if you have a LV800 flash */
#endif
3)修改flash.c中的函数
$ vi board/ds_liang2440/flash.c
在flash_erase函数中
令:
if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) {
??????????????????????? addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x00AA00AA;
??????????????????????? addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE)0x00550055;
??????????????????????? addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x00800080;
??????????????????????? addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x00AA00AA;
??????????????????????? addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE)0x00550055;
??????????????????????? addr2[0] = (CFG_FLASH_WORD_SIZE)0x00500050;? /* block erase */
为:
if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_SST) {
??????????????????????? addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x00AA;
??????????????????????? addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE)0x0055;
??????????????????????? addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x0080;
??????????????????????? addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x00AA;
??????????????????????? addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE)0x0055;
??????????????????????? addr2[0] = (CFG_FLASH_WORD_SIZE)0x0050;? /* block erase */
令:
?if (sect == s_first) {
??????????????????????????? addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x00AA00AA;
??????????????????????????? addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE)0x00550055;
??????????????????????????? addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x00800080;
??????????????????????????? addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x00AA00AA;
??????????????????????????? addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE)0x00550055;
??????????????????????? }
??????????????????????? addr2[0] = (CFG_FLASH_WORD_SIZE)0x00300030;? /* sector erase */
为:
?if (sect == s_first) {
??????????????????????????? addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x00AA;
??????????????????????????? addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE)0x0055;
??????????????????????????? addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x0080;
??????????????????????????? addr[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x00AA;
??????????????????????????? addr[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE)0x0055;
??????????????????????? }
??????????????????????? addr2[0] = (CFG_FLASH_WORD_SIZE)0x0030;? /* sector erase */
令:
?addr = (CFG_FLASH_WORD_SIZE *)(info->start[l_sect]);
??????? while ((addr[0] & (CFG_FLASH_WORD_SIZE)0x00800080) != (CFG_FLASH_WORD_SIZE)0x00800080)
为:
?addr = (CFG_FLASH_WORD_SIZE *)(info->start[l_sect]);
??????? while ((addr[0] & (CFG_FLASH_WORD_SIZE)0x0080) != (CFG_FLASH_WORD_SIZE)0x0080)
令:
??????? addr[0] = (CFG_FLASH_WORD_SIZE)0x00F000F0;????? /* reset bank */
为:
??????? addr[0] = (CFG_FLASH_WORD_SIZE)0x00F0;????? /* reset bank */
在flash_get_size函数中:
令:
??????? addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x00AA00AA;
??????? addr2[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE)0x00550055;
??????? addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x00900090;
为:
??????? addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x00AA;
??????? addr2[CFG_FLASH_ADDR1] = (CFG_FLASH_WORD_SIZE)0x0055;
??????? addr2[CFG_FLASH_ADDR0] = (CFG_FLASH_WORD_SIZE)0x0090;
??在第二个switch中加入:
case (CFG_FLASH_WORD_SIZE)SST_ID_xF1601:
??????????????? info->flash_id += FLASH_SST1601;
??????????????? info->sector_count = 32;
??????????????? info->size = 0x00200000;
??????????????? break;??
?
在write_buff函数中:
令全部#ifdef CONFIG_B2改写为#ifdef CONFIG_SMDK2410
?
在flash_print_info函数中:
switch个添加
case FLASH_SST1601:????? printf ("SST39LF/VF1601(16 Mbit,bottom boot sect)n");
??????????????????????????????? break;
4)在include/flash.h中添加
#define FLASH_SST1601 0x0048
（加在SST那组)
?
Nor Flash驱动就到此结束了
$ make clean
$ make ds_liang2440_config
$ make all
当前目录生成的u-boot.bin文件支持nor flash 的写操作
串口输出中多了
如:
pro off all
//解除保护,不解除不能进行擦除操作
erase all
