Updated Drivers

drivers/0x0f_flash/0x0f_flash.c

@@ -44,22 +44,44 @@
 #define FLASH_TARGET_OFFSET (FLASH_DRIVER_SIZE_BYTES - FLASH_DRIVER_SECTOR_SIZE)
 #define FLASH_WRITE_LEN     FLASH_DRIVER_PAGE_SIZE
 
-int main(void) {
-    stdio_init_all();
 
+/**
+ * @brief Fill a write buffer with 0xFF and copy the demo string into it
+ *
+ * @param buf      Destination buffer
+ * @param buf_size Size of the buffer in bytes
+ */
+static void _prepare_write_buf(uint8_t *buf, size_t buf_size) {
+    memset(buf, 0xFF, buf_size);
+    const char *msg = "Embedded Hacking flash driver demo";
+    memcpy(buf, msg, strlen(msg));
+}
+
+
+/**
+ * @brief Write the demo string to flash and print the read-back result
+ */
+static void _write_and_verify(void) {
     static uint8_t write_buf[FLASH_WRITE_LEN];
     static uint8_t read_buf[FLASH_WRITE_LEN];
-
-    memset(write_buf, 0xFF, sizeof(write_buf));
-    const char *msg = "Embedded Hacking flash driver demo";
-    memcpy(write_buf, msg, strlen(msg));
-
+    _prepare_write_buf(write_buf, sizeof(write_buf));
     flash_driver_write(FLASH_TARGET_OFFSET, write_buf, FLASH_WRITE_LEN);
     flash_driver_read(FLASH_TARGET_OFFSET, read_buf, FLASH_WRITE_LEN);
-
     printf("Flash readback: %s\r\n", read_buf);
-
-    while (true) {
-        tight_loop_contents();
-    }
+}
+
+
+/**
+ * @brief Application entry point for the on-chip flash demo
+ *
+ * Writes a demo string to the last flash sector, reads it back,
+ * and prints the result over UART.
+ *
+ * @return int Does not return
+ */
+int main(void) {
+    stdio_init_all();
+    _write_and_verify();
+    while (true)
+        tight_loop_contents();
 }

drivers/0x0f_flash/flash.c

@@ -40,6 +40,7 @@ void flash_driver_write(uint32_t flash_offset, const uint8_t *data, uint32_t len
     restore_interrupts(ints);
 }
 
+
 void flash_driver_read(uint32_t flash_offset, uint8_t *out, uint32_t len) {
     const uint8_t *flash_target_contents = (const uint8_t *)(XIP_BASE + flash_offset);
     memcpy(out, flash_target_contents, len);