Implement ERASE command

firmware/src/commands.c

@@ -6,6 +6,7 @@
 
 #include <string.h>
 #include <stdbool.h>
+#include <stdio.h>
 #include <stdlib.h>
 #include <util/delay.h>
 
@@ -219,8 +220,30 @@ void commandWrite(char* arg) {
     uartPutLine("OK END");
 }
 
-void commandErase() {
-    uartPutLine("ERROR not implemented");
+void commandErase(char* arg) {
+    if (arg == NULL) {
+        uartPutLine("ERROR ERASE needs a start address");
+        return;
+    }
+
+    // Parse address(es)
+    AddressRange range = parseAddressRange(arg);
+    if (!range.isValid || range.to < range.from) {
+        uartPutLine("ERROR invalid address format");
+        return;
+    }
+
+    uint32_t bytesErased = eepromEraseBlock(range);
+
+    if (bytesErased == 0) {
+        uartPutLine("ERROR 0 bytes erased");
+    } else {
+        char outBuffer[16];
+        snprintf(outBuffer, 16, "%lu", bytesErased);
+        uartPutString("OK erased ");
+        uartPutString(outBuffer);
+        uartPutLine(" bytes");
+    }
 }
 
 // TESTREAD command: for testing purposes, reads a few bytes and returns them in a human readable format.