Use independent watchdog driver

Core/main.cc

@@ -7,19 +7,26 @@
 
 #include "platform/stm32g0xx/Gpio.h"
 #include "platform/stm32g0xx/Uart.h"
-
-IWDG_HandleTypeDef hiwdg;
+#include "platform/stm32g0xx/IndependentWatchdog.h"
 
 static void SystemClock_Config(void);
-// static void MX_IWDG_Init(void);
 
 #define SYS_TICK_PRIO   0
 
+// NOTE! The independent watchdog is clocked by a separate clock. this one
+//       isn't controlled by JTAG. That's why the independent watchdog needs to
+//       be disabled during JTAG debug sessions.
+#define JTAG_DEBUG
+
 using namespace perinet::platform::stm32g0xx;
 
 Gpio green_led(Gpio::Port::PORT_A, 5, Gpio::Mode::MODE_OUTPUT_PP);
 Uart uart(Uart::UartDevice::UART_2, 115200);
 
+#ifndef JTAG_DEBUG
+IndependentWatchdog watchdog(4095, 4095);
+#endif
+
 int main(void)
 {
     unsigned int i = 1, j = 40;
@@ -41,9 +48,12 @@ int main(void)
 
     SystemClock_Config();
 
-    // MX_IWDG_Init();
-
     char tx_buf[80];
+
+#ifndef JTAG_DEBUG
+    watchdog.enable();
+#endif
+
     while (1) {
         if (j < 100) {
             j += 10;
@@ -61,7 +71,10 @@ int main(void)
         uart.sync_send((const uint8_t *)tx_buf, strlen(tx_buf));
         green_led.toggle();
         HAL_Delay(j);
-        // HAL_IWDG_Refresh(&hiwdg);
+
+#ifndef JTAG_DEBUG
+        watchdog.trigger();
+#endif
     }
 }
 
@@ -132,24 +145,6 @@ void SystemClock_Config(void)
     MODIFY_REG(RCC->CCIPR, RCC_CCIPR_USART2SEL, RCC_USART2CLKSOURCE_PCLK1);
 }
 
-// static void MX_IWDG_Init(void)
-// {
-//     hiwdg.Instance = IWDG;
-//     hiwdg.Init.Prescaler = IWDG_PRESCALER_4;
-//     hiwdg.Init.Window = 4095;
-//     hiwdg.Init.Reload = 4095;
-//     if (HAL_IWDG_Init(&hiwdg) != HAL_OK) {
-//         Error_Handler();
-//     }
-// }
-
-void Error_Handler(void)
-{
-    __disable_irq();
-    while (1) {
-    }
-}
-
 #ifdef  USE_FULL_ASSERT
 void assert_failed(uint8_t *file, uint32_t line)
 {

Makefile

@@ -8,7 +8,8 @@ BUILD_DIR = _build
 CC_SOURCES = \
 Core/main.cc \
 platform/stm32g0xx/Gpio.cc \
-platform/stm32g0xx/Uart.cc
+platform/stm32g0xx/Uart.cc \
+platform/stm32g0xx/IndependentWatchdog.cc
 
 C_SOURCES = \
 platform/stm32g0xx/stm32g0xx_it.c \