diff --git a/meson.build b/meson.build
index 6d73855e..ddaae0c7 100644
--- a/meson.build
+++ b/meson.build
@@ -11,7 +11,7 @@ project('OpenRTX', 'c',
 
 ## OpenRTX
 
-openrtx_src = ['openrtx/src/main.c',
+openrtx_src = ['tests/platform/printCalib_MDUV380.c',
                'openrtx/src/bootstrap.c',
                'openrtx/src/state.c',
                'openrtx/src/ui.c',
@@ -20,6 +20,7 @@ openrtx_src = ['openrtx/src/main.c',
 openrtx_inc = ['openrtx/include/interfaces',
                'openrtx/include',
                'platform/drivers/ADC',
+               'platform/drivers/NVM',
                'platform/drivers/tones',
                'openrtx/include/fonts/adafruit']
 
@@ -161,6 +162,7 @@ md390_def = def + stm32f405_def
 ## TYT MD-UV380
 mduv380_src = src + stm32f405_src + ['platform/drivers/display/HX83XX_MDx.c',
                                      'platform/drivers/keyboard/keyboard_MDx.c',
+                                     'platform/drivers/NVM/extFlash_MDx.c',
                                      'platform/drivers/ADC/ADC1_MDx.c',
                                      'platform/targets/MD-UV380/platform.c',
                                      'openrtx/src/graphics/graphics_rgb565.c']
diff --git a/platform/targets/MD-UV380/hwconfig.h b/platform/targets/MD-UV380/hwconfig.h
index 466894e6..dd0864a0 100644
--- a/platform/targets/MD-UV380/hwconfig.h
+++ b/platform/targets/MD-UV380/hwconfig.h
@@ -72,6 +72,12 @@
 #define MONI_SW LCD_D6
 #define FUNC_SW LCD_D7
 
+/* External flash */
+#define FLASH_CS  GPIOD,7
+#define FLASH_CLK GPIOB,3
+#define FLASH_SDO GPIOB,4
+#define FLASH_SDI GPIOB,5
+
 /*
  * To enable pwm for display backlight dimming uncomment this directive.
  *
diff --git a/tests/platform/printCalib_MDUV380.c b/tests/platform/printCalib_MDUV380.c
new file mode 100644
index 00000000..aaec1273
--- /dev/null
+++ b/tests/platform/printCalib_MDUV380.c
@@ -0,0 +1,38 @@
+
+#include <stdio.h>
+#include <stdint.h>
+#include <sys/types.h>
+#include "extFlash_MDx.h"
+
+int main()
+{
+    extFlash_init();
+    extFlash_wakeup();
+
+    while(1)
+    {
+        getchar();
+
+        uint8_t buf[16];
+        uint32_t addr = 0x1000;
+        for(; addr < 0x1100; addr += sizeof(buf))
+        {
+            (void) extFlash_readSecurityRegister(addr, buf, sizeof(buf));
+            printf("\r\n%lx: ", addr);
+            for(unsigned int i = 0; i < sizeof(buf); i++) printf("%03d ", buf[i]);
+        }
+
+        puts("\r");
+
+        for(addr = 0x2000; addr < 0x2100; addr += sizeof(buf))
+        {
+            (void) extFlash_readSecurityRegister(addr, buf, sizeof(buf));
+            printf("\r\n%lx: ", addr);
+            for(unsigned int i = 0; i < sizeof(buf); i++) printf("%03d ", buf[i]);
+        }
+
+        puts("\r");
+    }
+
+    return 0;
+}