Example for using custom UART port/pin. Additional debug output on erase of unused flash sectors.

config/examples/nrf5340.config

@@ -49,7 +49,10 @@ USE_GCC=1
 CFLAGS_EXTRA+=-DFLASHBUFFER_SIZE=0x1000
 
 # Enable optional power control pin (active low) P1.00
-CFLAGS_EXTRA+=-DQSPI_PWR_CTRL_PORT=1 -DQSPI_PWR_CTRL_PIN=0
+#CFLAGS_EXTRA+=-DQSPI_PWR_CTRL_PORT=1 -DQSPI_PWR_CTRL_PIN=0
+
+# Use UART0 on P0.22
+#CFLAGS_EXTRA+=-DUART_PORT=0 -DUART_PIN=22
 
 CFLAGS_EXTRA+=-DDEBUG_FLASH
 CFLAGS_EXTRA+=-DDEBUG_QSPI=1

docs/Targets.md

@@ -2186,11 +2186,8 @@ Tested with the Nordic nRF5340-DK. This device has two cores:
 1) Application core: Cortex-M33 at 128MHz, w/TrustZone, 1MB flash, 512KB RAM
 2) Network core: Cortex-M33 at 64MHz, 256KB Flash and 64KB RAM
 
-The cores communicate using the IPC peripheral.
-
-The network core can access application core resources (flash, RAM, and peripherals) when granted permission through the application's DCNF and SPU settings. A small portion of the application core RAM is dedicated to the exchange of messages between the application and network cores.
-
 The DK board has two virtual COM ports. Application core and Network core will each output to different VCOM ports.
+The cores communicate firmware updates using shared memory hosted on application core.
 
 Example Boot Output:
 

hal/nrf5340.c

@@ -466,9 +466,11 @@ static void hal_net_check_version(void)
                 /* signal network core to do update */
                 hal_shm_status_set(&shm->app, SHARED_STATUS_UPDATE_START);
 
+                wolfBoot_printf("Waiting for net core update to finish...\n");
+
                 /* wait for update_done */
                 ret = hal_shm_status_wait(&shm->net,
-                    SHARED_STATUS_UPDATE_DONE, 1000000);
+                    SHARED_STATUS_UPDATE_DONE, 5000000);
                 if (ret == 0) {
                     wolfBoot_printf("Network core firmware update done\n");
                 }

src/update_flash.c

@@ -265,6 +265,7 @@ static int wolfBoot_swap_and_final_erase(int resume)
         wb_flash_write(boot, tmpBootPos, (void*)tmpBuffer, sizeof(tmpBuffer));
     }
     /* erase the last boot sector(s) */
+    wolfBoot_printf("Erasing unused boot sectors...\n");
     wb_flash_erase(boot, WOLFBOOT_PARTITION_SIZE - eraseLen, eraseLen);
     /* set the encryption key */
 #ifdef EXT_ENCRYPTED
@@ -281,6 +282,7 @@ static int wolfBoot_swap_and_final_erase(int resume)
     /* mark boot as TESTING */
     wolfBoot_set_partition_state(PART_BOOT, IMG_STATE_TESTING);
     /* erase the last sector(s) of update */
+    wolfBoot_printf("Erasing unused update sectors...\n");
     wb_flash_erase(update, WOLFBOOT_PARTITION_SIZE - eraseLen, eraseLen);
     return 0;
 }
@@ -440,7 +442,7 @@ static int wolfBoot_delta_update(struct wolfBoot_image *boot,
     }
 #ifndef DISABLE_BACKUP
     /* start re-entrant final erase, return code is only for resumption in
-     * wolfBoot_start*/
+     * wolfBoot_start */
     wolfBoot_swap_and_final_erase(0);
 #endif
 out: