i.mx6ull MCU when FW control the EIM bus , the LUNIX system brake down sometimes.

[zhongweihe]

Hello team: Our thermal printer use MCU is MCIMX6Y2CVM08AB which is i.mx6ull series , we use EIM bus out put data (these signals is :TPH_DATA1(E4 CSI_data00) ;TPH_data2(E3 CSI_data01 );TPH_DATA3(E2 CSI_data02);TPH_DATA4(E1 CSI_data03);TPH_DATA5(D4 CSI_data04);TPH_DATA6(D3 CSI_data05);TPH_DATA7(D2 CSI_data06);TPH_CLK(F2 CSI_VSYNC) now we have one bug is that when FW control the TPH_CLK(F2 CSI_VSYNC) this clock output 9.4Mhz , the lunix system will brake down sometimes . could you please help us analysis and give us good suggestion .thanks very much .

[igorpadykov]

Hi Zhongwei 

had board passed ddr test :

https://community.nxp.com/t5/i-MX-Processors-Knowledge-Base/i-MX-6-7-DDR-Stress-Test-Tool/ta-p/11082...

In general one can try to debug to find place in code where crash happens

AN4553  Using Open Source Debugging Tools for Linux on i.MX Processors

for M4 core  use J-Link debug probe as described in  Windows Installer: MCUXpresso SDK2.2 for i.MX 6ULL

Best regards
igor