STM8 's compilation Learning

Learning STM8


There are only 6 registers in the STM8 CPU, i.e. A, X, Y, SP, PC, CC.
Complete the 2 8-bit unsigned number additions to the memory, and the results are also saved to memory.
unsigned char a,b,c;
c = a + B;


The STM8 is compiled as follows:


LD a,$1000
ADD a,$1001
LD $1002,a


This assumes that the A,B,C 3 variables are stored in memory, with an address of 1000,1001,1002.




static @inline void Jump_to_new_prog (void) Remote upgrade Section assembly code
{
_asm ("LDW X, SP");
_asm ("LD A, $FF");
_asm ("LD XL, A");
_asm ("LDW SP, X");
_asm ("JPF $9000");
}