initial commit

project/ble_peripheral/ble_app_vivaMayo/debug_print.h

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+// file: debug_print.h
+#ifndef DEBUG_PRINT_H
+#define DEBUG_PRINT_H
+
+#include <stdbool.h>
+#include <stdio.h>
+#include "nrf_delay.h"
+#include "SEGGER_RTT.h"
+
+/* Output selection: 0=UART(printf), 1=RTT */
+#define USE_RTT_OUTPUT 1
+
+#define ENABLE_PRINTF 1  // Set to 0 to disable globally (DBG_PRINTF off, LOG_PRINTF still works)
+#define LOG_FLUSH_MS  0  // UART flush delay (0 recommended due to blocking behavior)
+
+#if USE_RTT_OUTPUT
+    /* RTT output */
+    #if ENABLE_PRINTF
+        #define DBG_PRINTF(...) SEGGER_RTT_printf(0, __VA_ARGS__)
+    #else
+        #define DBG_PRINTF(...) // Do nothing
+    #endif
+    #define LOG_PRINTF(...) do { if (g_log_enable) SEGGER_RTT_printf(0, __VA_ARGS__); } while(0)
+#else
+    /* UART output */
+    #if ENABLE_PRINTF
+        #define DBG_PRINTF(...) printf(__VA_ARGS__)
+    #else
+        #define DBG_PRINTF(...) // Do nothing
+    #endif
+    #if LOG_FLUSH_MS > 0
+        #define LOG_PRINTF(...) do { \
+            if (g_log_enable) { \
+                printf(__VA_ARGS__); \
+                nrf_delay_ms(LOG_FLUSH_MS); \
+            } \
+        } while(0)
+    #else
+        #define LOG_PRINTF(...) do { if (g_log_enable) printf(__VA_ARGS__); } while(0)
+    #endif
+#endif
+
+/* Log macro linked to g_log_enable flag (runtime controllable) */
+extern bool g_log_enable;
+
+#endif // DEBUG_PRINT_H