Cant write to APSR register Cortex-M23

Hello all, i m doing test software for processor registers arm cortex m-23 , every thing is good except the xPSR registers , now i cant write to APSR register ? i changed the control register to be...
cant write to APSR register cortex-M23

Hello all, i m doing test software for processor registers arm cortex m-23 , every thing is good except the xPSR registers , now i cant write to APSR register ? i changed the control register to be...
IOC flag at FPSCR register

I using Cortex-R4. And I reading "Cortex™-R4 and Cortex-R4F Technical Reference Manual(Revision:r1p3)". In my system, IOC flag in FPSCR register is set with unexpected processing. What is the condition...
IOC flag at FPSCR register

I using Cortex-R4. And I reading "Cortex™-R4 and Cortex-R4F Technical Reference Manual(Revision:r1p3)". In my system, IOC flag in FPSCR register is set with unexpected processing. What is the condition...
RI (Receive Interrupt) flag problem in SCON register (Serial Communication)

Hello, I need help with the serial communication, when I am sending data from PC (hyper-terminal) through RS232 , RI flag should rise to '1' and its does not happened, what may be the problem? BTW...