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S32G3使用A核访问HSE实现CMAC更新

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S32G3使用A核访问HSE实现CMAC更新

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4 周之前
284 次查看
RoseRice
Contributor II

SOC型号：S32G399A，RTD版本4.0.2，HSE版本：0.2.22.0

您好：
  我们已经在M核的Bootloader中实现了安全启动（安全启动的CMAC值存放在QSpiFlash的指定地址）。现在有一个需求是要通过A核去更新M核中的程序，我想知道的是A核可以访问HSE吗？以及能不能通过A核更新安全启动的CMAC值？A核和M核都访问HSE会不会产生冲突？

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3 周之前
233 次查看
chenyin_h
NXP Employee
NXP Employee

Hello, @RoseRice 

您好，一般而言，A核和M核会通过不同的MU访问HSE，不会有冲突。

您可以尝试使用libhse/libpkcs 等库在A核端访问HSE, 然后写入QSPI相应位置来尝试实现相应功能

 

BR

Chenyin

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3 周之前
234 次查看
chenyin_h
NXP Employee
NXP Employee

Hello, @RoseRice 

您好，一般而言，A核和M核会通过不同的MU访问HSE，不会有冲突。

您可以尝试使用libhse/libpkcs 等库在A核端访问HSE, 然后写入QSPI相应位置来尝试实现相应功能

 

BR

Chenyin

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