This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

加密版c6748 ini配置TAPSCONFIG参数问题

Other Parts Discussed in Thread: OMAP-L138, TMS320C6748

如题,想知道TAPSCONFIG这个参数配置有哪些?

; This function allows the user to selectively open up the
; the debug TAPs of the device. Since the function is not
; executed until the signature is checked, it does not
; pose a security issue.
; |------24|------16|----------8|----------0|
; TAPSCFG: | RSVD | tapscfg |
[TAPSCONFIG]
TAPSCFG = 0x0000FFFF

查阅了很多文档都没有找到这个参数,希望能够得到解答,谢谢!

  • 同时,在查看《TMS320C6748/OMAP-L138 Security User’s Guide》这篇文档时,对于eFuse的理解还存在一个问题:

    原文中提到“The production configuration of TMS320C6748/OMAP-L138 devices is defined by 8 eFuse bits, and is therefore not modifiable in the field.”,也就是说eFuse是个不可修改的值。在后文的System Status Register这个只读寄存器中它的低三位又是从EFUSE读取的。这里是否存在矛盾???

  • jun xiao4 说:

    同时,在查看《TMS320C6748/OMAP-L138 Security User’s Guide》这篇文档时,对于eFuse的理解还存在一个问题:

    原文中提到“The production configuration of TMS320C6748/OMAP-L138 devices is defined by 8 eFuse bits, and is therefore not modifiable in the field.”,也就是说eFuse是个不可修改的值。在后文的System Status Register这个只读寄存器中它的低三位又是从EFUSE读取的。这里是否存在矛盾???

    efuse是出厂时烧写的。用户不可更改。

    后面说的是读efuse以判断芯片的种类,不存在矛盾吧。

  • jun xiao4 说:

    ; This function allows the user to selectively open up the
    ; the debug TAPs of the device. Since the function is not
    ; executed until the signature is checked, it does not
    ; pose a security issue.
    ; |------24|------16|----------8|----------0|
    ; TAPSCFG: | RSVD | tapscfg |
    [TAPSCONFIG]
    TAPSCFG = 0x0000FFFF

    查阅了很多文档都没有找到这个参数,希望能够得到解答,谢谢!

    这个是用来打开JTAG的。如果不加这个,启动后JTAG还是关的。