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