Hang Xie

Tips to run EEE Driver with freeRTOS in MPC5746C

Discussion created by Hang Xie on Sep 19, 2017
Latest reply on Sep 19, 2017 by Hang Xie

We had port freeRTOS v8.2.3 to MPC5746C, but when I porting the EEPROM emulation driver, I found that need to disable the D-Cache (define the macro "DCACHE_AVAILABLE" ) when exec "FSL_WriteEeprom" and "FSL_MainFunction", If not define the DCACHE_AVAILABLE macro, the swapping will failure, But after I disable the D-Cache, the freeRTOS may run unsteadiness or trig Machine Check Exception.

(Similar to this post Disable Dcache of 5744 will make CCP unsteadiness )


Finally, I  set the EEPROM area (0xF90000 ~ 0x00F9FFFF) "cache inhibit" in the SMPU, and undefine the macro "DCACHE_AVAILABLE", then both the EEE Driver and freeRTOS work fine.