TMS320f2808疑问

emyhx 2012-1-12 15:56 楼主

有两个疑问：
问题1
TMS320f2808怎样实现芯片自检测？
问题2
由于软件工作在不同的工作模式，需要将部分软件屏蔽，本人采用的是调用FLASH2808 API的flash_Erase函数进行擦除不必要的程序，但是擦除不成功，后来将中断屏蔽后擦除成功了，但使能中断后，会进入非法中断，不知道什么原因？

回复评论（12）

沙发 hlx3012

TI没有针对28x芯片提供self test 库；听说过段时间会提供。

FLASH API运行时不能使能中断，这在API的PDF说明文档中有详细说明。

?? Don’t execute the flash API from wait stated memory such as XINTF.
?? Don’t execute the Flash APIs from the flash or OTP. If the APIs are stored in flash or OTP memory,
they must first be copied to internal SARAM before they are executed.
?? Don’t execute any interrupt service routines (ISRs) that can occur during an erase, program or
depletion recovery API function from the flash or OTP memory blocks. Until the API function completes
and exits the flash and OTP are not available for program execution or data storage.
?? Don’t execute the API callback function from flash or OTP. When the callback function is invoked by
the API during the erase, program or depletion recovery routine the flash and OTP are not available for
program execution or data storage. Only after the API function completes and exits will the flash and
OTP be available.
?? Don’t stop the erase, program or depletion recovery functions while they are executing (for example,
don’t stop the debugger within API code, don’t reset the part, etc).
?? Do not execute code or fetch data from the flash array or OTP while the flash and/or OTP is being
erased, programmed or during depletion recovery.

点赞 2012-1-12 16:34

板凳安_然

这样会烧坏芯片的

工程 = 数学＋物理＋经济

点赞 2012-1-12 16:57

4楼 hlx3012

这样不会烧坏芯片，会烧坏芯片的是在擦除密码区的时候强制断电，而密码区此时正好全为0，或者为随机数，导致芯片锁死。

非密码区可能导致芯片需要Depletion.（我也不知道这词该咋说)

FLASH API可以使用中断(不能使用不可屏蔽中断)，但不建议使用中断。FLASHAPI在运行中会自动disable中断，使得一些实时的程序无法正常运行。

详细的还是看FLASH-API的PDF把，里面有说清楚: The flash/OTP is left in a safe state when interrupts are enabled and during the callback function. There is no restriction on the amount of time that can be spent in the ISR or callback function.

[ 本帖最后由 hlx3012 于 2012-1-12 23:25 编辑 ]

点赞 2012-1-12 23:24

5楼 emyhx

谢谢大家帮忙，首先我掉用flash API的函数是在RAML0中运行的（从flash搬移到RAML0中），其次我在调用flash API(flash_Erase)时擦除不成功。于是我在调用flash API 之前屏蔽了所有中断(中断写在flash中)，然后进行擦除操作，擦除成功了，调用flash_Erase结束后，我又使能了中断，结果就出现程序进入非法中断中。不知道怎么解决？

点赞 2012-1-13 08:13