Hello. I've never used MPU and cache before, so i dont know how to solve problem.
I'am working with LPSPI and receiving data form external flash:
base->TCR |= LPSPI_TCR_TXMSK(isTxMask); // start transmission
while (!(base->SR & LPSPI_SR_FCF_MASK)) {}; // waiting for frame transfer has completed
this code doesnot work properly. Some times it works and some time it doesnot. It hangs and i cant even stop the debugger. If i disable icache before waiting it works, but delays are significant.
This works:
base->TCR |= LPSPI_TCR_TXMSK(isTxMask);
if (SCB_CCR_IC_Msk == (SCB_CCR_IC_Msk & SCB->CCR)){SCB_DisableICache();}
while (!(base->SR & LPSPI_SR_FCF_MASK)) {};
SCB_EnableICache();
Does anybody can explain me, what i am doing wrong?
