eeprom_write_byte_example implemented

mgoblin · mgoblin · commit 7d27eb5f6fa6 · 2025-11-22T13:49:56.000+03:00
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-<h3>eeprom &rarr; include Relation</h3><table class="dirtab"><tr class="dirtab"><th class="dirtab">File in examples/eeprom</th><th class="dirtab">Includes file in include</th></tr><tr class="dirtab"><td class="dirtab"><b>eeprom_erase_page_example.c</b></td><td class="dirtab"><a class="el" href="delay_8h.html">delay.h</a></td></tr><tr class="dirtab"><td class="dirtab"><b>eeprom_erase_page_example.c</b></td><td class="dirtab"><a class="el" href="eeprom_8h.html">eeprom.h</a></td></tr><tr class="dirtab"><td class="dirtab"><b>eeprom_erase_page_example.c</b></td><td class="dirtab"><a class="el" href="uart_8h.html">uart.h</a></td></tr><tr class="dirtab"><td class="dirtab"><b>eeprom_read_byte_example.c</b></td><td class="dirtab"><a class="el" href="eeprom_8h.html">eeprom.h</a></td></tr><tr class="dirtab"><td class="dirtab"><b>eeprom_read_byte_example.c</b></td><td class="dirtab"><a class="el" href="uart_8h.html">uart.h</a></td></tr></table></div><!-- contents -->
+<h3>eeprom &rarr; include Relation</h3><table class="dirtab"><tr class="dirtab"><th class="dirtab">File in examples/eeprom</th><th class="dirtab">Includes file in include</th></tr><tr class="dirtab"><td class="dirtab"><b>eeprom_erase_page_example.c</b></td><td class="dirtab"><a class="el" href="delay_8h.html">delay.h</a></td></tr><tr class="dirtab"><td class="dirtab"><b>eeprom_erase_page_example.c</b></td><td class="dirtab"><a class="el" href="eeprom_8h.html">eeprom.h</a></td></tr><tr class="dirtab"><td class="dirtab"><b>eeprom_erase_page_example.c</b></td><td class="dirtab"><a class="el" href="uart_8h.html">uart.h</a></td></tr><tr class="dirtab"><td class="dirtab"><b>eeprom_read_byte_example.c</b></td><td class="dirtab"><a class="el" href="eeprom_8h.html">eeprom.h</a></td></tr><tr class="dirtab"><td class="dirtab"><b>eeprom_read_byte_example.c</b></td><td class="dirtab"><a class="el" href="uart_8h.html">uart.h</a></td></tr><tr class="dirtab"><td class="dirtab"><b>eeprom_write_byte_example.c</b></td><td class="dirtab"><a class="el" href="delay_8h.html">delay.h</a></td></tr><tr class="dirtab"><td class="dirtab"><b>eeprom_write_byte_example.c</b></td><td class="dirtab"><a class="el" href="eeprom_8h.html">eeprom.h</a></td></tr><tr class="dirtab"><td class="dirtab"><b>eeprom_write_byte_example.c</b></td><td class="dirtab"><a class="el" href="uart_8h.html">uart.h</a></td></tr></table></div><!-- contents -->
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diff --git a/docs/html/dir_000040_000019.html b/docs/html/dir_000040_000019.html
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-<h3>src &rarr; include Relation</h3><table class="dirtab"><tr class="dirtab"><th class="dirtab">File in src</th><th class="dirtab">Includes file in include</th></tr><tr class="dirtab"><td class="dirtab"><b>eeprom.c</b></td><td class="dirtab"><a class="el" href="delay_8h.html">delay.h</a></td></tr><tr class="dirtab"><td class="dirtab"><b>eeprom.c</b></td><td class="dirtab"><a class="el" href="eeprom_8h.html">eeprom.h</a></td></tr><tr class="dirtab"><td class="dirtab"><b>eeprom.c</b></td><td class="dirtab"><a class="el" href="uart_8h.html">uart.h</a></td></tr><tr class="dirtab"><td class="dirtab"><b>uart.c</b></td><td class="dirtab"><a class="el" href="uart_8h.html">uart.h</a></td></tr></table></div><!-- contents -->
+<h3>src &rarr; include Relation</h3><table class="dirtab"><tr class="dirtab"><th class="dirtab">File in src</th><th class="dirtab">Includes file in include</th></tr><tr class="dirtab"><td class="dirtab"><b>uart.c</b></td><td class="dirtab"><a class="el" href="uart_8h.html">uart.h</a></td></tr></table></div><!-- contents -->
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diff --git a/examples/eeprom/SConscript b/examples/eeprom/SConscript
@@ -13,5 +13,9 @@ env.Default (
         ['eeprom_erase_page_example.c', 'uart.c']
     ),
 
+    env.Program(
+        'eeprom_write_byte_example', 
+        ['eeprom_write_byte_example.c', 'uart.c']
+    ),
     
 )
diff --git a/examples/eeprom/eeprom_write_byte_example.c b/examples/eeprom/eeprom_write_byte_example.c
@@ -0,0 +1,51 @@
+/**
+ * This example demonstrates how to write byte to EEPROM.
+ * 
+ * On successful write, byte is read back and printed.
+ */
+#include <eeprom.h>
+
+#include <uart.h>
+#include <stdio.h>
+
+#include <delay.h>
+
+#define ADDR_H 0x00
+#define ADDR_L 0x00
+
+#define EMPTY_VALUE 0x00
+#define DEFAULT_ERROR 0x00
+#define DEFAULT_VALUE 0x55
+
+#define DELAY_MS 1000
+
+uint8_t error = DEFAULT_ERROR;
+uint8_t value = EMPTY_VALUE;
+
+void main(void)
+{
+    uart1_init(9600);
+    power_low_voltage_flag_clear();
+
+    while (1)
+    {
+        // Before writing, page will be erased
+        eeprom_erase_page(ADDR_H, &error);
+        eeprom_write_byte(ADDR_H, ADDR_L, DEFAULT_VALUE, &error);
+        
+        if (!error)
+        {
+            printf_tiny("Write to %x %x = %x successful\r\n", ADDR_H, ADDR_L, DEFAULT_VALUE);
+            // Read back
+            eeprom_read_byte(ADDR_H, ADDR_L, &value, &error);
+            printf_tiny("Read back %x with status %x\r\n\r\n", value, error);
+        }
+        else
+        {
+            printf_tiny("Write to %x %x failed\r\n\r\n", ADDR_H, ADDR_L);
+        }
+
+        delay_ms(DELAY_MS);
+    }
+    
+}
diff --git a/src/eeprom.c b/src/eeprom.c

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