keil5 unknown type name uint8_t

This error usually occurs when the compiler doesn't recognize the data type `uint8_t`. To fix this, you need to include the appropriate header file that defines this type.

In Keil uVision, you can include the `<stdint.h>` header file at the beginning of your source code. This header file defines standard integer types, including `uint8_t`. Make sure that you have the necessary libraries and header files included in your project settings.

Here's an example of how to include `<stdint.h>` in your code:

#include <stdint.h>

int main(void) {
    uint8_t myVariable;
    
    // Rest of your code
    
    return 0;
}

By including `<stdint.h>`, the compiler will recognize the `uint8_t` type and you won't encounter the "unknown type name" error.