S32K148 MCAL ENET EBERR 问题

[fhz2000]

您好 .遇到了问题.

以下是描述

目前正在配置S32K148-MCAL的Eth模块.

port中配置好pin脚

配置eth

生成代码后 组入

先调用eth_init

Eth_Init(&Eth_Config_VS_0);

随后使能控制器

Eth_SetControllerMode(EthConf_EthCtrlConfig_EthCtrlConfig_0, ETH_MODE_ACTIVE);

在此过程中

    Base->ECR |= ((uint32)(0x2U) | (0x100U));

    Base->ECR |= ((uint32)1U << (4U));

是可以正常配置ETHEREN为1的

但是一旦尝试初始化收发时,便会BUS ERROR

后续的发送更不可能了

请问我该如何继续调查

[fhz2000]

问题进展更新 : 现在追查到MPU的 CESR 寄存器了.看起来好像是uDMA尝试访问内存时被内存保护察觉到并拦截了.

[PetrS · Accepted solution]

Hi,

you can check following.
- be sure user buffer and buffer descriptors are properly aligned and placed into non-cacheable area. ENET_RDSR and ENET_TDSR points to beginning of buffer descriptors rings.
- if MPU is enabled, be sure ENET master have access to memory area where user buffer and buffer descriptors are placed.

Some comments can be seen in https://community.nxp.com/t5/S32-SDK/The-ENET-module-of-S32K148-chip-failed-to-initialize-and-the/td...as well.

BR, Petr

[fhz2000]

感谢 问题解决

[fhz2000]

感谢回复 问题已经 解决 原因是没配置MCAL的RM模块导致MPU模块没初始化ENET相关的内存访问权限