commit 0c7aebcfe37d8cd52498d8c5b6a94990f49bdb80
author Roman Okhrimenko <roman.okhrimenko@cypress.com> Wed Sep 02 13:37:51 2020 +0300
committer Roman Okhrimenko <roman.okhrimenko@cypress.com> Mon Feb 01 16:39:18 2021 +0200
tree 745df49a88371c1d2aaf3c564537ae6fdab40ed0
parent 79c4fcf403af79f81c740da2b12eb87597733379

cypress: Add support for watchdog timer update in boot image

Add watchdog timer to MCUBootApp plus BlinkyApp to implement  additional way of boot/upgrade image operation confirmation.

Signed-off-by: Roman Okhrimenko <roman.okhrimenko@cypress.com>

boot/cypress/MCUBootApp/libs.mk

diff --git a/boot/cypress/MCUBootApp/libs.mk b/boot/cypress/MCUBootApp/libs.mk
index 227cda6..3605bb3 100644
--- a/boot/cypress/MCUBootApp/libs.mk
+++ b/boot/cypress/MCUBootApp/libs.mk
@@ -33,6 +33,7 @@
 
 # Collect source files for PDL
 SOURCES_PDL := $(wildcard $(CUR_LIBS_PATH)/pdl/psoc6pdl/drivers/source/*.c)
+SOURCES_WATCHDOG := $(wildcard $(CUR_LIBS_PATH)/watchdog/*.c)
 
 # PDL related include directories
 INCLUDE_DIRS_PDL := $(CUR_LIBS_PATH)/pdl/psoc6pdl/drivers/include
@@ -42,12 +43,14 @@
 
 # core-libs related include directories
 INCLUDE_DIRS_CORE_LIB := $(CUR_LIBS_PATH)/core-lib/include
+INCLUDE_DIRS_WATCHDOG := $(CUR_LIBS_PATH)/watchdog
 
 SOURCES_HAL += $(CUR_LIBS_PATH)/psoc6hal/COMPONENT_PSOC6HAL/source/cyhal_crypto_common.c
 SOURCES_HAL += $(CUR_LIBS_PATH)/psoc6hal/COMPONENT_PSOC6HAL/source/cyhal_hwmgr.c
 
 # Collected source files for libraries
 SOURCES_LIBS := $(SOURCES_PDL)
+SOURCES_LIBS += $(SOURCES_WATCHDOG)
 SOURCES_LIBS += $(SOURCES_PLATFORM)
 SOURCES_LIBS += $(SOURCES_HAL)
 
@@ -61,6 +64,7 @@
 INCLUDE_DIRS_LIBS := $(addprefix -I,$(INCLUDE_DIRS_PDL))
 INCLUDE_DIRS_LIBS += $(addprefix -I,$(INCLUDE_DIRS_PLATFORM))
 INCLUDE_DIRS_LIBS += $(addprefix -I,$(INCLUDE_DIRS_CORE_LIB))
+INCLUDE_DIRS_LIBS += $(addprefix -I,$(INCLUDE_DIRS_WATCHDOG))
 INCLUDE_DIRS_LIBS += $(addprefix -I,$(INCLUDE_DIRS_HAL))
 
 ################################################################################

boot/cypress/MCUBootApp/main.c

diff --git a/boot/cypress/MCUBootApp/main.c b/boot/cypress/MCUBootApp/main.c
index 2211a28..6c28ba0 100644
--- a/boot/cypress/MCUBootApp/main.c
+++ b/boot/cypress/MCUBootApp/main.c
@@ -38,6 +38,11 @@
 
 #include "bootutil/fault_injection_hardening.h"
 
+#include "watchdog.h"
+
+/* WDT time out for reset mode, in milliseconds. */
+#define WDT_TIME_OUT_MS 4000
+
 /* Define pins for UART debug output */
 #define CYBSP_UART_ENABLED 1U
 #define CYBSP_UART_HW SCB5
@@ -121,6 +126,12 @@
         if (fih_eq(fih_rc, FIH_SUCCESS))
         {
             BOOT_LOG_INF("User Application validated successfully");
+            /* initialize watchdog timer. it should be updated from user app
+            * to mark successful start up of this app. if the watchdog is not updated,
+            * reset will be initiated by watchdog timer and swap revert operation started
+            * to roll back to operable image.
+            */
+            cy_wdg_init(WDT_TIME_OUT_MS);
             do_boot(&rsp);
             boot_succeeded = true;
         }