add eeprom code, not work

.gitignore

@@ -27,3 +27,5 @@
 *.exe
 *.zip
 *.pdf
+/prosjekt.X/build/
+/prosjekt.X/dist/

prosjekt.X/main.c

@@ -4,15 +4,163 @@
  *
  * Created on March 6, 2024, 12:34 PM
  */
-
+/* 
+ * File:   main.c
+ * Author: athamantis
+ *
+ * Created on 01 March 2024, 10:34
+ */
+#include <avr/io.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <stdint.h>
+#define F_CPU 4E6
+#include <util/delay.h>
+#include <avr/eeprom.h>
+#include <stdbool.h>
+#define USART3_BAUD_RATE(BAUD_RATE) ((float)(F_CPU * 64 / (16 *(float) BAUD_RATE)) + 0.5)
+#include <string.h>
 
-/*
- * 
- */
-int main(int argc, char** argv) {
+// Init UART comunication
+void USART3_init(void) {
+    // Enable resiver pin
+    PORTB.DIR &= ~PIN1_bm;
+    // Enable sender pin
+    PORTB.DIR |= PIN0_bm;
+    USART3.BAUD = (uint16_t) USART3_BAUD_RATE(115200);
+    USART3.CTRLB |= USART_TXEN_bm;
 
-    return (EXIT_SUCCESS);
+    // Enabled in the USART register
+    USART3.CTRLB |= USART_RXEN_bm;
+}
+
+// Use printline __________________________
+static void USART3_sendChar(char c) {
+    while (!(USART3.STATUS & USART_DREIF_bm)) {
+        ;
+    }
+    USART3.TXDATAL = c;
+}
+
+static int USART3_printChar(char c, FILE *stream) {
+    USART3_sendChar(c);
+    return 0;
+}
+static FILE USART_stream = FDEV_SETUP_STREAM(USART3_printChar, NULL, _FDEV_SETUP_WRITE);
+
+uint8_t USART3_read() {
+    while (!(USART3.STATUS & USART_RXCIF_bm)) {
+        ;
+    }
+    return USART3.RXDATAL;
+}
+
+/*
+ * make a struct
+ * a space is reserved for that struct
+ * make a function that write the struct to the space
+ * 
+ * a running counter for where the fanspeed data should be set
+ * make a function that write the mesured fanSpeed
+ * 
+ * read the memory for the struct
+ * read the memory for the fanspeed
+ */
+
+uint8_t fanControllerStartAddress = 0x00;
+bool alreadyWrittenAblock = false;//false
+
+uint8_t fanSpeedStartAddress = 0x30;
+uint8_t currentFanSpeedAddress = 0x30;
+
+typedef struct {
+    uint8_t fanSpeed;
+} config_t;
+
+void checkEEpromIsReady(){
+    printf("checking eeprom");
+    if (eeprom_is_ready()){
+        printf("it is");
+    }else{
+        printf("its not");
+    }
+}
+
+void WriteStructInEEPROM(config_t writeStruct){
+    uint8_t structSize; 
+    structSize = sizeof(writeStruct);
+    
+    //check if eeprom_is_ready()
+    checkEEpromIsReady();
+    
+    if (alreadyWrittenAblock){
+        eeprom_update_block((void*) &writeStruct,(void*) &fanControllerStartAddress, structSize);
+    }else{
+        eeprom_write_block((config_t*) &writeStruct, &fanControllerStartAddress, structSize);
+        alreadyWrittenAblock = true;//true
+        //reurn something
+    }
+}
+
+config_t ReadStructInEEPROM(){
+    //is eeprom ready??
+    config_t readStruct;
+    uint8_t structsize = sizeof(readStruct);
+    
+    //checkEEpromIsReady();
+    
+    eeprom_read_block((void *) &readStruct,(void*) &fanControllerStartAddress, structsize);
+    return readStruct;
+}
+
+void WriteFanSpeedInEEPROM(uint8_t fanSpeed){
+    
+    //checkEEpromIsReady();
+    
+    eeprom_write_byte(currentFanSpeedAddress, fanSpeed);
+    currentFanSpeedAddress++;
+}
+
+void ReadFanSpeedInfo(){
+    //read the space as an array or??
+    //eeprom_read_block();
+    //this write it too or?
+    uint8_t len = currentFanSpeedAddress - fanSpeedStartAddress;
+    uint8_t fanSpeedIterate = 0;
+    
+    //checkEEpromIsReady();
+    
+    for (uint8_t i = 0; i <len; i++){
+        fanSpeedIterate = eeprom_read_byte(i);
+        printf("Fanspeed nr %u : %u", i, fanSpeedIterate);
+    }
+    
+}
+
+void main() {
+    USART3_init();
+    stdout = &USART_stream;
+    
+    config_t fanController; 
+        
+    fanController.fanSpeed = 8; 
+    
+    while(1){
+        printf("in loop\n");
+      printf("Write the struct \n");
+        WriteStructInEEPROM(fanController);
+
+        printf("Read struct\n");
+        config_t recivedFancontroller = ReadStructInEEPROM();
+
+        printf("writing in eeprom\n");
+        WriteFanSpeedInEEPROM(2);
+        WriteFanSpeedInEEPROM(3);
+        WriteFanSpeedInEEPROM(5);
+
+        printf("reading from eeprom\n");
+        ReadFanSpeedInfo(); 
+        _delay_ms(500);
+   }
 }