How to avoid unexpected results while the value of SFRS Register changed before ISR occurs?
Posted: 31 May 2021, 16:12
On interrupt, user must to be pushed the current SFRS value to the stack. Also on a return from interrupt, the stack is popped to the SFRS register.
Keil C51：
Note: push_(SFRS)以及_pop_(SFRS) are defined in the file.
IAR EW8051：
Note: __sfr __no_init volatile unsigned char SFRS @ 0x91;
Keil C51：
Note: push_(SFRS)以及_pop_(SFRS) are defined in the file.
IAR EW8051：
Note: __sfr __no_init volatile unsigned char SFRS @ 0x91;