STM8S RAM Re-understanding-EEWORLD

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For example, STM8S003 has 1 RAM, and the maximum 512 is used for stack by default.

Only 512 are left for users

The 512 is divided into idata xdata according to the understanding of 51, that is, @tiny @near

Without keyword restriction, the default is idata area (address less than 256).

char tttds[258];

If the idata area exceeds the range, it will prompt segment.ubsct size overflow (5)

Adding keywords defines the area as above 256 addresses.

@near char ttt[51];

If this definition exceeds the range, it will prompt segment .bss size overflow (1)

The two addresses cannot be continuous and mixed, that is, if an array exceeds 256, then there is only one way to make the stack smaller and put it in the near area. Modify the Linker item in the STVD project settings, drop down the RAM address bar of INPUT in the category, and change 0X1FF to a larger value. This can be achieved. Of course, you must pay attention to the stack not overflowing because it has become smaller.

I still have some doubts, FILE: line 178: Address 0x1019 is out of range and is ignored! In my program, it is impossible to use address 1019, and the program can run normally. I don’t know why this prompt appears during STVP. I have also seen the HEX file, and there is indeed data at address 1019, which is 0. How is it generated? Is it a COSMIC BUG?

Keywords：STM8S RAM Reference address：STM8S RAM Re-understanding

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