Initial commit.

Signed-off-by: Yilin Sun <imi415@imi.moe>

CMakeLists.txt

@@ -1,6 +1,6 @@
 cmake_minimum_required(VERSION 3.10)
 
-project(air001_template)
+project(air001_bpc)
 
 enable_language(CXX)
 enable_language(ASM)
@@ -56,6 +56,7 @@ set(TARGET_SOURCES
     "board/board.c"
     "src/py32f0xx_hal_msp.c"
     "src/py32f0xx_it.c"
+    "src/app_bpc.c"
     "src/app_syscalls.c"
     "src/main.c"
 )

SDK

@@ -0,0 +1 @@
+Subproject commit 7e27dee1d5e90ea6f1316a7df4d72fc9fc280059

board/board.c

@@ -3,14 +3,32 @@
 #include "py32f0xx_hal.h"
 
 void BOARD_InitBootPins(void) {
+    BOARD_InitLEDPins();
+    BOARD_InitBPCPins();
+}
+
+void BOARD_InitLEDPins(void) {
     __HAL_RCC_GPIOB_CLK_ENABLE();
 
     GPIO_InitTypeDef init = {
-        .Pin   = GPIO_PIN_0 | GPIO_PIN_1 | GPIO_PIN_3,
+        .Pin   = BOARD_LED_1_PIN | BOARD_LED_2_PIN | BOARD_LED_3_PIN,
         .Mode  = GPIO_MODE_OUTPUT_PP,
         .Speed = GPIO_SPEED_FREQ_LOW,
         .Pull  = GPIO_NOPULL,
     };
 
-    HAL_GPIO_Init(GPIOB, &init);
+    HAL_GPIO_Init(BOARD_LED_1_PORT, &init);
+}
+
+void BOARD_InitBPCPins(void) {
+    __HAL_RCC_GPIOA_CLK_ENABLE();
+
+    GPIO_InitTypeDef init = {
+        .Pin   = BOARD_BPC_PON_PIN,
+        .Mode  = GPIO_MODE_OUTPUT_OD,
+        .Speed = GPIO_SPEED_FREQ_LOW,
+        .Pull  = GPIO_NOPULL,
+    };
+
+    HAL_GPIO_Init(BOARD_BPC_PON_PORT, &init);
 }

board/board.h

@@ -1,14 +1,31 @@
 #ifndef BOARD_H
 #define BOARD_H
 
+/* ==== LED ==== */
 #define BOARD_LED_1_PORT GPIOB
 #define BOARD_LED_2_PORT GPIOB
 #define BOARD_LED_3_PORT GPIOB
 
 #define BOARD_LED_1_PIN GPIO_PIN_1
 #define BOARD_LED_2_PIN GPIO_PIN_0
-#define BOARD_LED_3_PIN_GPIO_PIN_3
+#define BOARD_LED_3_PIN GPIO_PIN_3
+
+/* ==== UART ==== */
+#define BOARD_UART_TX_PORT GPIOA
+#define BOARD_UART_RX_PORT GPIOA
+
+#define BOARD_UART_TX_PIN GPIO_PIN_2
+#define BOARD_UART_RX_PIN GPIO_PIN_3
+
+/* ==== BPC ==== */
+#define BOARD_BPC_PON_PORT  GPIOA
+#define BOARD_BPC_NTCO_PORT GPIOA
+
+#define BOARD_BPC_PON_PIN  GPIO_PIN_7
+#define BOARD_BPC_NTCO_PIN GPIO_PIN_4
 
 void BOARD_InitBootPins(void);
+void BOARD_InitLEDPins(void);
+void BOARD_InitBPCPins(void);
 
 #endif  // BOARD_H

include/main.h

@@ -1,8 +1,11 @@
 #ifndef MAIN_H
 #define MAIN_H
 
+#include "board.h"
+
 #include "py32f0xx_hal.h"
 
 extern UART_HandleTypeDef huart1;
+extern TIM_HandleTypeDef htim14;
 
 #endif  // MAIN_H

include/py32f0xx_hal_conf.h

@@ -44,7 +44,7 @@ extern "C" {
 #define HAL_GPIO_MODULE_ENABLED
 //#define HAL_IWDG_MODULE_ENABLED
 //#define HAL_WWDG_MODULE_ENABLED
-//#define HAL_TIM_MODULE_ENABLED
+#define HAL_TIM_MODULE_ENABLED
 #define HAL_DMA_MODULE_ENABLED
 //#define HAL_LPTIM_MODULE_ENABLED
 #define HAL_PWR_MODULE_ENABLED

src/app_bpc.c

@@ -0,0 +1,58 @@
+/* Board */
+#include "board.h"
+
+/* App */
+#include "main.h"
+
+#define APP_BPC_TIM_CHANNEL TIM_CHANNEL_1
+
+int app_bpc_init(void) {
+    /* Enable BPC module */
+    HAL_GPIO_WritePin(BOARD_BPC_PON_PORT, BOARD_BPC_PON_PIN, 0U);
+
+    htim14.Instance               = TIM14;
+    htim14.Init.Prescaler         = (HAL_RCC_GetPCLK1Freq() / 1000) - 1;
+    htim14.Init.Period            = 2500 - 1;
+    htim14.Init.RepetitionCounter = 0;
+    htim14.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_ENABLE;
+    htim14.Init.ClockDivision     = TIM_CLOCKDIVISION_DIV1;
+    htim14.Init.CounterMode       = TIM_COUNTERMODE_UP;
+
+    if (HAL_TIM_Base_Init(&htim14) != HAL_OK) {
+        return -1;
+    }
+
+    TIM_IC_InitTypeDef ic_init = {
+        .ICSelection = TIM_ICSELECTION_DIRECTTI,
+        .ICPolarity  = TIM_ICPOLARITY_BOTHEDGE,
+        .ICPrescaler = TIM_ICPSC_DIV1,
+        .ICFilter    = 0,
+    };
+
+    if (HAL_TIM_IC_ConfigChannel(&htim14, &ic_init, APP_BPC_TIM_CHANNEL) != HAL_OK) {
+        return -2;
+    }
+
+    /* Enable reload interrupt, for timeout detection */
+    __HAL_TIM_ENABLE_IT(&htim14, TIM_IT_UPDATE);
+
+    if (HAL_TIM_IC_Start_IT(&htim14, APP_BPC_TIM_CHANNEL) != HAL_OK) {
+        return -3;
+    }
+
+    return 0;
+}
+
+void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim) {
+    if (htim->Instance == TIM14) {
+        HAL_GPIO_TogglePin(BOARD_LED_2_PORT, BOARD_LED_2_PIN);
+    }
+}
+
+void HAL_TIM_IC_CaptureCallback(TIM_HandleTypeDef *htim) {
+    if (htim->Instance == TIM14) {
+        __HAL_TIM_SET_COUNTER(htim, 0U);
+
+        HAL_GPIO_TogglePin(BOARD_LED_1_PORT, BOARD_LED_1_PIN);
+    }
+}

src/main.c

@@ -7,7 +7,15 @@
 #include "app_syscalls.h"
 #include "main.h"
 
+#define APP_SAMPLING_MOVING_AVG 100
+
 UART_HandleTypeDef huart1;
+TIM_HandleTypeDef  htim14;
+
+static uint8_t          s_moving_avg[APP_SAMPLING_MOVING_AVG];
+static volatile uint8_t s_moving_avg_ptr = 0U;
+
+int app_bpc_init(void);
 
 int main(void) {
     HAL_Init();
@@ -18,8 +26,11 @@ int main(void) {
 
     printf("Hello world.\r\n");
 
+    app_bpc_init();
+
     for (;;) {
-        HAL_GPIO_TogglePin(BOARD_LED_1_PORT, BOARD_LED_1_PIN);
-        HAL_Delay(500);
+        __WFI();
     }
-}
+
+    return 0;
+}

src/py32f0xx_hal_msp.c

@@ -38,20 +38,42 @@ void HAL_MspInit(void) {
 
 void HAL_UART_MspInit(UART_HandleTypeDef *huart) {
     if (huart == &huart1) {
-        __HAL_RCC_USART1_CLK_ENABLE();
         __HAL_RCC_GPIOA_CLK_ENABLE();
 
-        GPIO_InitTypeDef GPIO_InitStruct;
-        GPIO_InitStruct.Pin       = GPIO_PIN_2 | GPIO_PIN_3;
-        GPIO_InitStruct.Mode      = GPIO_MODE_AF_PP;
-        GPIO_InitStruct.Pull      = GPIO_NOPULL;
-        GPIO_InitStruct.Speed     = GPIO_SPEED_FREQ_LOW;
-        GPIO_InitStruct.Alternate = GPIO_AF1_USART1;
-        HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
+        GPIO_InitTypeDef GPIO_InitStruct = {
+            .Pin       = BOARD_UART_TX_PIN | BOARD_UART_RX_PIN,
+            .Mode      = GPIO_MODE_AF_PP,
+            .Pull      = GPIO_NOPULL,
+            .Speed     = GPIO_SPEED_FREQ_LOW,
+            .Alternate = GPIO_AF1_USART1,
+        };
+        HAL_GPIO_Init(BOARD_UART_TX_PORT, &GPIO_InitStruct);
 
-        HAL_NVIC_SetPriority(USART1_IRQn, 0, 1);
+        __HAL_RCC_USART1_CLK_ENABLE();
+
+        HAL_NVIC_SetPriority(USART1_IRQn, 4, 0);
         HAL_NVIC_EnableIRQ(USART1_IRQn);
     }
 }
 
+void HAL_TIM_Base_MspInit(TIM_HandleTypeDef *htim) {
+    if (htim->Instance == TIM14) {
+        __HAL_RCC_GPIOA_CLK_ENABLE();
+
+        GPIO_InitTypeDef GPIO_InitStruct = {
+            .Pin       = BOARD_BPC_NTCO_PIN,
+            .Mode      = GPIO_MODE_AF_PP,
+            .Pull      = GPIO_NOPULL,
+            .Speed     = GPIO_SPEED_FREQ_LOW,
+            .Alternate = GPIO_AF4_TIM14,
+        };
+
+        HAL_GPIO_Init(BOARD_BPC_NTCO_PORT, &GPIO_InitStruct);
+
+        __HAL_RCC_TIM14_CLK_ENABLE();
+        HAL_NVIC_SetPriority(TIM14_IRQn, 3, 0);
+        HAL_NVIC_EnableIRQ(TIM14_IRQn);
+    }
+}
+
 /************************ (C) COPYRIGHT Puya *****END OF FILE******************/

src/py32f0xx_it.c

@@ -89,4 +89,12 @@ void USART1_IRQHandler(void)
   HAL_UART_IRQHandler(&huart1);
 }
 
+/**
+  * @brief This function handles TIM14 Interrupt .
+ */
+void TIM14_IRQHandler(void)
+{
+  HAL_TIM_IRQHandler(&htim14);
+}
+
 /************************ (C) COPYRIGHT Puya *****END OF FILE******************/