Q:

How to access the fixed memory location in embedded C?

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YasminRadwan26

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2022-06-23

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How to access the fixed memory location in embedded C?

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YasminRadwan26

2022-06-23

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Answer:

Let us see an example code to understand this concept. This question is one of the best questions of the embedded C interview question.

Suppose in an application, you need to access a fixed memory address. So you need to follow the below steps, these are high-level steps.

//Memory address, you want to access
#define RW_FLAG 0x1FFF7800
//Pointer to access the Memory address
volatile uint32_t *flagAddress = NULL;
//variable to stored the read value
uint32_t readData = 0;
//Assign addres to the pointer
flagAddress = (volatile uint32_t *)RW_FLAG;
//Read value from memory
* flagAddress = 12; // Write
//Write value to the memory
readData = * flagAddress;

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