Verify the main app mostly sleeps

This validates that the main watch app spends at
least 99.5% of it's time sleeping in the first 10
seconds.

firmware/Application/Screens/BigDigitalTimeScreen.cpp

@@ -37,7 +37,7 @@ BigDigitalTimeScreen::BigDigitalTimeScreen(BSP::DisplayDriver &driver,
     , m_last_time()
     , m_manager(manager)
     , m_menu_screen(menu_screen)
-    , m_display_seconds(true)
+    , m_display_seconds(false)
 {}
 
 static char get_char_for_digit(uint8_t bcd_digit)

firmware/Application/main.cpp

@@ -104,10 +104,16 @@ static BigDigitalTimeScreen g_digital_time_screen(g_display, g_screen_mgr, g_mai
 
 [[noreturn]] void main() {
 
+    g_gpioa.init();
+    g_gpioa.enable();
+
+    g_dbg0.configure_output(GpioDriver::output_mode_t::PUSH_PULL,
+                            GpioDriver::output_speed_t::LOW);
+
     // Set up the system clock
     RtcDriver::init();
     SystemTimer::set_timer(RtcDriver::get_system_timer());
-    LowPower::init();
+    LowPower::init(g_dbg0);
 
     // Initialize the tasks
     g_lptim_pwm.init();
@@ -115,7 +121,7 @@ static BigDigitalTimeScreen g_digital_time_screen(g_display, g_screen_mgr, g_mai
     g_btn_mgr.init();
     g_display.init();
     g_screen_mgr.init();
-    g_screen_mgr.set_root_screen(g_analog_time_screen);
+    g_screen_mgr.set_root_screen(g_digital_time_screen);
 
     g_set_face_screen.add_item(MenuScreenItem("Analog",
                                               []() { g_screen_mgr.set_root_screen(g_analog_time_screen); }));

firmware/Bsp/Drivers/LowPower.cpp

@@ -31,9 +31,19 @@ namespace BSP {
 
 using BSP::ReturnCode;
 
+GpioPin *LowPower::m_timing_pin = nullptr;
+
 ReturnCode LowPower::init()
 {
-    enable_debug();
+    m_timing_pin = nullptr;
+    return ReturnCode::OK;
+}
+
+ReturnCode LowPower::init(GpioPin &timing_pin)
+{
+    m_timing_pin = &timing_pin;
+    m_timing_pin->write(0);
+
     return ReturnCode::OK;
 }
 
@@ -93,7 +103,13 @@ ReturnCode LowPower::stop()
     CLR(RCC->CFGR, RCC_CFGR_STOPWUCK); // MSI oscillator is wake-up from stop clock
     SET(SCB->SCR, SCB_SCR_SLEEPDEEP_Msk); // low-power mode = stop mode
 
-    __WFI(); // enter low-power mode (Wake from interrupt)
+    if (m_timing_pin != nullptr) {
+        m_timing_pin->write(1);
+        __WFI(); // enter low-power mode (Wake from interrupt)
+        m_timing_pin->write(0);
+    } else{
+        __WFI();
+    }
 
     wakeups++;
 

firmware/Bsp/Drivers/LowPower.h

@@ -22,6 +22,7 @@
 #pragma once
 
 #include "Bsp/ReturnCode.h"
+#include "Bsp/Drivers/GpioDriver.h"
 
 extern uint32_t wakeups;
 
@@ -32,10 +33,14 @@ public:
     LowPower() = delete;
 
     static BSP::ReturnCode init();
+    static BSP::ReturnCode init(GpioPin &timing_pin);
+
     static BSP::ReturnCode sleep();
     static BSP::ReturnCode stop();
     static BSP::ReturnCode enable_debug();
     static BSP::ReturnCode disable_debug();
+
+    static GpioPin *m_timing_pin;
 };
 
 }

firmware/Test/Board/devboard.cpp

@@ -32,6 +32,7 @@ using namespace BSP::Schedule;
 LowPowerTaskScheduler<10> g_sched;
 GpioDriver g_gpioa(GPIOA);
 UsartDriver g_test_uart(USART1, g_sched);
+GpioPin g_debug0_pin(g_gpioa, 4);
 
 void board_init() {
     g_gpioa.enable();

firmware/Test/Board/watch.cpp

@@ -31,11 +31,13 @@ using namespace BSP::Schedule;
 LowPowerTaskScheduler<10> g_sched;
 GpioDriver g_gpioa(GPIOA);
 UsartDriver g_test_uart(USART2, g_sched);
+GpioPin g_debug0_pin(g_gpioa, 3);
 static GpioPin g_tx_pin(g_gpioa, 9);
 
 void board_init() {
     g_gpioa.enable();
     g_tx_pin.configure_alternate_function(4);
+    g_debug0_pin.configure_input(GpioDriver::input_pull_t::PULL_UP);
     g_test_uart.init();
 
     RtcDriver::init();

firmware/Test/Common/TestBoard.h

@@ -30,3 +30,4 @@ void board_init();
 extern BSP::Schedule::LowPowerTaskScheduler<10> g_sched;
 extern BSP::GpioDriver g_gpioa;
 extern BSP::UsartDriver g_test_uart;
+extern BSP::GpioPin g_debug0_pin;