DFU activation 후 App 부팅 시 전원 OFF 처리 추가

project/dfu/secure_bootloader/main.c

@@ -76,6 +76,8 @@ static void dfu_observer(nrf_dfu_evt_type_t evt_type)
             break;
         case NRF_DFU_EVT_DFU_STARTED:
             break;
+        case NRF_DFU_EVT_DFU_COMPLETED:
+            break;
         default:
             break;
     }

project/dfu/secure_bootloader/pca10056_s140_ble/arm5_no_packs/RTE/Device/nRF52840_xxAA/system_nrf52.c

@@ -32,6 +32,8 @@ NOTICE: This file has been modified by Nordic Semiconductor ASA.
 #include "system_nrf52_approtect.h"
 
 #define __SYSTEM_CLOCK_64M      (64000000UL)
+#define POWER_HOLD_PIN          8UL
+#define POWER_HOLD_PIN_MASK     (1UL << POWER_HOLD_PIN)
 
 
 #if defined ( __CC_ARM )
@@ -89,6 +91,15 @@ void SystemCoreClockUpdate(void)
 
 void SystemInit(void)
 {
+    /* Keep the external power latch asserted immediately after reset. */
+    NRF_P0->OUTSET = POWER_HOLD_PIN_MASK;
+    NRF_P0->DIRSET = POWER_HOLD_PIN_MASK;
+    NRF_P0->PIN_CNF[POWER_HOLD_PIN] =
+        (GPIO_PIN_CNF_DIR_Output << GPIO_PIN_CNF_DIR_Pos) |
+        (GPIO_PIN_CNF_INPUT_Disconnect << GPIO_PIN_CNF_INPUT_Pos) |
+        (GPIO_PIN_CNF_PULL_Disabled << GPIO_PIN_CNF_PULL_Pos) |
+        (GPIO_PIN_CNF_DRIVE_H0H1 << GPIO_PIN_CNF_DRIVE_Pos) |
+        (GPIO_PIN_CNF_SENSE_Disabled << GPIO_PIN_CNF_SENSE_Pos);
     /* Enable SWO trace functionality. If ENABLE_SWO is not defined, SWO pin will be used as GPIO (see Product
        Specification to see which one). */
     #if defined (ENABLE_SWO) && defined(CLOCK_TRACECONFIG_TRACEMUX_Pos)

project/dfu/secure_bootloader/pca10056_s140_ble/arm5_no_packs/secure_bootloader_ble_s140_pca10056.uvoptx

@@ -73,7 +73,7 @@
         <LExpSel>0</LExpSel>
       </OPTXL>
       <OPTFL>
-        <tvExp>0</tvExp>
+        <tvExp>1</tvExp>
         <tvExpOptDlg>0</tvExpOptDlg>
         <IsCurrentTarget>1</IsCurrentTarget>
       </OPTFL>