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https://github.com/IcedRooibos/py32f0-template.git
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108 lines
2.6 KiB
C
108 lines
2.6 KiB
C
/**
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* Window Watchdog Demo
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*/
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#include "main.h"
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#include "py32f0xx_bsp_clock.h"
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#include "py32f0xx_bsp_printf.h"
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#define WINDOW_IN /* Inside watchdog window */
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//#define WINDOW_UPPER /* Delay too short, watchdog will reset */
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//#define WINDOW_LOWER /* Delay too long, watchdog will reset during delay */
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static void APP_GPIO_Config(void);
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static void APP_WWDG_Config(void);
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static uint32_t APP_TimeoutCalculate(uint32_t timevalue);
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int main(void)
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{
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uint8_t delay = 0;
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// Set HSI 24MHz as system clock source
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BSP_RCC_HSI_24MConfig();
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// Initialize UART on PA2:TX PA3:RX
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BSP_USART_Config(115200);
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printf("PY32F0 WWDG Window Test\r\nClock: %ld\r\n", SystemCoreClock);
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// Set PB5 for LED output
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APP_GPIO_Config();
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if (LL_RCC_IsActiveFlag_WWDGRST())
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{
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LL_GPIO_SetOutputPin(GPIOB, LL_GPIO_PIN_5);
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LL_mDelay(1000);
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LL_GPIO_ResetOutputPin(GPIOB, LL_GPIO_PIN_5);
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LL_mDelay(500);
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LL_RCC_ClearResetFlags();
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}
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else
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{
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LL_GPIO_ResetOutputPin(GPIOB, LL_GPIO_PIN_5);
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}
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APP_WWDG_Config();
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#if defined(WINDOW_UPPER)
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delay = APP_TimeoutCalculate((0x7F - 0x50) - 5) + 1;
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#elif defined(WINDOW_IN)
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delay = APP_TimeoutCalculate((0x7F - 0x50) + 1) + 1;
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#else
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delay = APP_TimeoutCalculate((0x7F - 0x3F) + 1) + 1;
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#endif
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while (1)
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{
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LL_GPIO_TogglePin(GPIOB, LL_GPIO_PIN_5);
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printf("Delay... ");
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LL_mDelay(delay);
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printf("set counter\r\n");
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LL_WWDG_SetCounter(WWDG, 0x7F);
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}
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}
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static void APP_GPIO_Config(void)
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{
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LL_IOP_GRP1_EnableClock(LL_IOP_GRP1_PERIPH_GPIOB);
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LL_GPIO_SetPinMode(GPIOB, LL_GPIO_PIN_5, LL_GPIO_MODE_OUTPUT);
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}
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static void APP_WWDG_Config(void)
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{
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LL_APB1_GRP1_EnableClock(LL_APB1_GRP1_PERIPH_WWDG);
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// Set the Watchdog counter value (7-bit), always write 1 in the MSB b6 to avoid immediate reset
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LL_WWDG_SetCounter(WWDG, 0x7F);
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LL_WWDG_SetPrescaler(WWDG, LL_WWDG_PRESCALER_8);
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// Set window to 0x50
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LL_WWDG_SetWindow(WWDG, 0x50);
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LL_WWDG_Enable(WWDG);
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}
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/**
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* Twwdg(second) = t_pclk1 * 4096 * 2^wdgtb * (T[5:0] + 1)
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* = 4096 * 2^wdgtb * (counter_diff) / f_pclk1
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*/
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static uint32_t APP_TimeoutCalculate(uint32_t countDiff)
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{
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LL_RCC_ClocksTypeDef RCC_Clocks;
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uint32_t f_pclk1 = 0;
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uint32_t wdgtb = 0;
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// Get HCLK
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LL_RCC_GetSystemClocksFreq(&RCC_Clocks);
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f_pclk1 = RCC_Clocks.PCLK1_Frequency;
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// 2^wdgtb
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wdgtb = (1 << ((LL_WWDG_PRESCALER_8) >> 7)); /* 2^WDGTB */
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// Calculate
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return ((4096 * wdgtb * countDiff) / (f_pclk1 / 1000));
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}
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void APP_ErrorHandler(void)
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{
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while (1);
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}
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#ifdef USE_FULL_ASSERT
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void assert_failed(uint8_t *file, uint32_t line)
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{
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while (1);
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}
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#endif /* USE_FULL_ASSERT */
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