NXP S08P-Lite开发板试用活动（8）flash驱动分享

原来的你 · 发表于 2018-12-9 16:14:33

在上一节介绍了自制OSBDM，本节介绍如何使用内部flash存储数据，对于S08来说，往往我们做产品时需要存储部分参数，为了节约成本，我们喜欢使用内部flash来替代外部的spi flash和eeprom，对于NXP S08P-Lite的驱动demo中并没有给出相应的flash驱动代码，对于新手来说，感觉自己编写是有些难度，那么我们改怎么做呢？不要担心，当然有方法，对于S08PT60来说，其flash的驱动代码是有的，后面再附件中下载即可，我介绍如何使用flash驱动例子。

我们只需要把这个驱动拷贝到我们之前的demo框架即可。

对于这个flash驱动demo，是一个驱动测试框架，我们可以测试各个功能。

#define MAX_NO_DATA (UIF_MAX_ARGS-2)
#define FLASH_USER_PARAM_ADDR 0xFC00
#define EEPROM_USER_PARAM_ADDR 0x3100
const char BANNER0[] = "\n*********************************\n";
const char BANNER1[] = "\nWelcome to PT60 Flash/EEPROM Lab!\n";
const char BANNER2[] = "\n*********************************\n";
const char BANNER3[] = "Please use recommended address to play with:\n" \
" flash address = %#04.4x\n EEPROM address = %#04.4x\n";
const char PROMPT[] = "CMD> ";
UIF_CMD UIF_CMDTAB[] =
{
UIF_CMD_HELP
{"ev_fb",0,1,0,cmd_eraseverify_flash_block, "EraseVerify flash block","<address in hex>"},
{"ev_eep",0,1,0,cmd_eraseverify_eeprom_block,"EraseVerify EEPROM block","<address in hex>"},
{"ev_fs",0,2,0,cmd_eraseverify_flash_section,"EraseVerify flash section","<address in hex> <# of longwords>"},
{"ev_eeps",0,2,0,cmd_eraseverify_eeprom_section, "EraseVerify EEPROM section","<address in hex> <# of bytes>"},
{"ev_all",0,0,0,cmd_eraseverify_all, "EraseVerify all blocks",""},
{"pg_eep",0,MAX_NO_DATA+1,0,cmd_program_eeprom, "Program EEPROM","<address in hex> <data1> [... <data100>]"},
{"pg_f",0,MAX_NO_DATA+1,0,cmd_program_flash, "Program flash","<address in hex> <data1> [... <data100>]"},
{"ers_eeps",0,1,0,cmd_erase_eeprom_sector, "Erase EEPROM sector","<address in hex>"},
{"ers_fs",0,1,0,cmd_erase_flash_sector, "Erase flash sector","<address in hex>"},
{"ers_eep",0,1,0,cmd_erase_eeprom_block, "Erase EEPROM block","<address in hex>"},
{"ers_fb",0,1,0,cmd_erase_flash_block, "Erase flash block","<address in hex>"},
{"ers_all",0,0,0,cmd_erase_all, "Erase all blocks",""},
};
UIF_SETCMD UIF_SETCMDTAB[] =
{
{NULL, 0,1,NULL,""},
};

复制代码

如上代码，是命令和调用对应的函数。

void
run_cmd (void)
{
/*
* Global array of pointers to emulate C argc,argv interface
*/
int argc;
char *argv[UIF_MAX_ARGS + 1]; /* one extra for null terminator */
int cmpResult;
get_line(cmdline1);
if (!(argc = make_argv(cmdline1,argv)))
{
/* no command entered, just a blank line */
strcpy(cmdline1,cmdline2);
argc = make_argv(cmdline1,argv);
}
cmdline2[0] = '\0';
if (argc)
{
int i;
for (i = 0; i < UIF_NUM_CMD; i++)
{
cmpResult = strcasecmp(UIF_CMDTAB[i].cmd,argv[0]);
if (!cmpResult)
{
if (((argc-1) >= UIF_CMDTAB[i].min_args) &&
((argc-1) <= UIF_CMDTAB[i].max_args))
{
if (UIF_CMDTAB[i].flags & UIF_CMD_FLAG_REPEAT)
{
strcpy(cmdline2,argv[0]);
}
UIF_CMDTAB[i].func(argc,argv);
return;
}
else
{
printf(SYNTAX,argv[0]);
return;
}
}
}
printf(INVCMD,argv[0]);
printf(HELPMSG);
}
}

复制代码

run_cmd 是读取命令和解析命令运行，完成flash操作。

以上就是flash驱动的底层，具体大家看源码即可。

satoll · 发表于 2019-1-17 10:07:10

感谢分享~

NXP S08P-Lite开发板 试用活动（8）flash驱动分享

站长推荐 /4

NXP S08P-Lite开发板试用活动（8）flash驱动分享