add code to do tristate led blinking...

This was for a project that is now partly abandoned due to cell
phone camera limitations...

blinkled/Makefile

@@ -38,9 +38,12 @@ PROGS = blinkled
 
 SRCS.blinkled = main.c
 SRCS.blinkled+= $(SRCTOP)/rs485hid/memdebug.c
+SRCS.blinkled+= stm32f1xx_hal_tim.c
+SRCS.blinkled+= stm32f1xx_hal_tim_ex.c
 
 CFLAGS+= -I$(.CURDIR)
 CFLAGS+= -g
+CFLAGS+= -DHAL_TIM_MODULE_ENABLED=1
 #CFLAGS+= -DNDEBUG
 
 WITH_STM32F103 = yes

blinkled/main.c

@@ -30,16 +30,25 @@
 
 #include <sysinit.h>
 
-#include <stm32f1xx_hal.h>
+#include <main.h>
 
 static void
-c13led(const void *none)
+c13led(void)
 {
 	GPIO_InitTypeDef GPIO_InitStruct;
 
+	__HAL_RCC_GPIOA_CLK_ENABLE();
 	__HAL_RCC_GPIOB_CLK_ENABLE();
 	__HAL_RCC_GPIOC_CLK_ENABLE();
 
+	GPIO_InitStruct = (GPIO_InitTypeDef){
+		.Pin = GPIO_PIN_3,
+		.Mode = GPIO_MODE_OUTPUT_PP,
+		.Pull = GPIO_NOPULL,
+		.Speed = GPIO_SPEED_FREQ_LOW,
+	};
+	HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
+
 	GPIO_InitStruct = (GPIO_InitTypeDef){
 		.Pin = GPIO_PIN_13,
 		.Mode = GPIO_MODE_OUTPUT_PP,
@@ -50,7 +59,58 @@ c13led(const void *none)
 
 	HAL_GPIO_WritePin(GPIOC, GPIO_PIN_13, GPIO_PIN_RESET);
 }
-SYSINIT(c13led, SI_SUB_HAL, SI_ORDER_SECOND, c13led, NULL);
+SYSINIT_VF(c13led, SI_SUB_HAL, SI_ORDER_SECOND, c13led);
+
+static TIM_HandleTypeDef htim2;
+
+/* 36.2.2 Step 1 */
+void
+HAL_TIM_PWM_MspInit(TIM_HandleTypeDef *htim)
+{
+}
+
+#define	PERIOD_VALUE	(700 - 1)
+
+void
+tim2ch4(void)
+{
+	GPIO_InitTypeDef GPIO_InitStruct;
+	uint32_t uhPrescalerValue;
+
+	/*
+	 * various parts from F1's
+	 * Projects/STM3210E_EVAL/Examples/TIM/TIM_PWMOutput/Src/main.c
+	 */
+	uhPrescalerValue = (uint32_t)(SystemCoreClock / 2000000) - 1;
+
+	/* 36.2.2 Step 2a */
+	__HAL_RCC_TIM2_CLK_ENABLE();
+
+	/* 36.2.2 Step 2b */
+	__HAL_RCC_GPIOA_CLK_ENABLE();
+
+	GPIO_InitStruct = (GPIO_InitTypeDef){
+		.Pin = GPIO_PIN_3,
+		.Mode = GPIO_MODE_AF_PP,
+		.Pull = GPIO_NOPULL,
+		.Speed = GPIO_SPEED_FREQ_LOW,
+	};
+	HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
+
+	/* 36.2.2 Step 4 */
+	htim2 = (TIM_HandleTypeDef){
+		.Instance = TIM2,
+
+		/* TIM_Base_InitTypeDef */
+		.Init.Prescaler = uhPrescalerValue,
+		.Init.Period = PERIOD_VALUE,
+		.Init.CounterMode = TIM_COUNTERMODE_UP,
+		.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE,
+	};
+	HAL_TIM_PWM_Init(&htim2);
+
+}
+SYSINIT_VF(tim2ch4, SI_SUB_HAL, SI_ORDER_THIRD, tim2ch4);
 
 int
 main(void)
@@ -58,11 +118,50 @@ main(void)
 
 	debug_printf("starting...\n");
 
+#if 0
 	/* toggle on LED */
 	for (;;) {
+		HAL_GPIO_WritePin(GPIOA, GPIO_PIN_3, GPIO_PIN_RESET);
 		HAL_GPIO_WritePin(GPIOC, GPIO_PIN_13, GPIO_PIN_RESET);
 		HAL_Delay(250);
+		HAL_GPIO_WritePin(GPIOA, GPIO_PIN_3, GPIO_PIN_SET);
 		HAL_GPIO_WritePin(GPIOC, GPIO_PIN_13, GPIO_PIN_SET);
 		HAL_Delay(250);
 	}
+#else
+	/* PA3 TIM2_CH4 */
+	TIM_OC_InitTypeDef oconfig;
+	oconfig = (TIM_OC_InitTypeDef){
+		.OCMode		= TIM_OCMODE_PWM1,
+		.OCPolarity	= TIM_OCPOLARITY_HIGH,
+		.OCFastMode	= TIM_OCFAST_DISABLE,
+		.OCNPolarity	= TIM_OCNPOLARITY_HIGH,
+		.OCNIdleState	= TIM_OCNIDLESTATE_RESET,
+
+		.OCIdleState	= TIM_OCIDLESTATE_RESET,
+
+		.Pulse		= PERIOD_VALUE,	// OFF
+	};
+	HAL_TIM_PWM_ConfigChannel(&htim2, &oconfig, TIM_CHANNEL_4);
+	HAL_TIM_PWM_Start(&htim2, TIM_CHANNEL_4);
+	for (int i = 0;; i = (i + 1) % 3) {
+		switch (i) {
+		case 0:
+			TIM2->CCR4 = PERIOD_VALUE;
+			break;
+		case 1:
+			TIM2->CCR4 = PERIOD_VALUE / 2;
+			break;
+		case 2:
+			TIM2->CCR4 = 0;
+			break;
+		}
+#if 0
+		HAL_Delay(100);
+#else
+		HAL_Delay(35);
+#endif
+	}
+	HAL_TIM_PWM_Stop(&htim2, TIM_CHANNEL_4);
+#endif
 }

stm32/.srcs

@@ -35,6 +35,10 @@ f103c8t6/stm32f1xx_hal_rcc_ex.c	STM32CubeF1	Drivers/STM32F1xx_HAL_Driver/Src/stm
 f103c8t6/stm32f1xx_hal_rcc_ex.h	STM32CubeF1	Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_rcc_ex.h
 f103c8t6/stm32f1xx_hal_rtc.h	STM32CubeF1	Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_rtc.h
 f103c8t6/stm32f1xx_hal_rtc_ex.h	STM32CubeF1	Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_rtc_ex.h
+f103c8t6/stm32f1xx_hal_tim.c	STM32CubeF1	Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_tim.c
+f103c8t6/stm32f1xx_hal_tim_ex.c	STM32CubeF1	Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_tim_ex.c
+f103c8t6/stm32f1xx_hal_tim.h	STM32CubeF1	Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_tim.h
+f103c8t6/stm32f1xx_hal_tim_ex.h	STM32CubeF1	Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_tim_ex.h
 f103c8t6/stm32f1xx_hal_uart.c	STM32CubeF1	Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_uart.c
 f103c8t6/stm32f1xx_hal_uart.h	STM32CubeF1	Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_hal_uart.h
 f103c8t6/stm32f1xx_ll_usb.h	STM32CubeF1	Drivers/STM32F1xx_HAL_Driver/Inc/stm32f1xx_ll_usb.h

stm32/f103c8t6/stm32f1xx_hal_tim_ex.h

@@ -0,0 +1,262 @@
+/**
+  ******************************************************************************
+  * @file    stm32f1xx_hal_tim_ex.h
+  * @author  MCD Application Team
+  * @brief   Header file of TIM HAL Extended module.
+  ******************************************************************************
+  * @attention
+  *
+  * <h2><center>&copy; Copyright (c) 2016 STMicroelectronics.
+  * All rights reserved.</center></h2>
+  *
+  * This software component is licensed by ST under BSD 3-Clause license,
+  * the "License"; You may not use this file except in compliance with the
+  * License. You may obtain a copy of the License at:
+  *                        opensource.org/licenses/BSD-3-Clause
+  *
+  ******************************************************************************
+  */
+
+/* Define to prevent recursive inclusion -------------------------------------*/
+#ifndef STM32F1xx_HAL_TIM_EX_H
+#define STM32F1xx_HAL_TIM_EX_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Includes ------------------------------------------------------------------*/
+#include "stm32f1xx_hal_def.h"
+
+/** @addtogroup STM32F1xx_HAL_Driver
+  * @{
+  */
+
+/** @addtogroup TIMEx
+  * @{
+  */
+
+/* Exported types ------------------------------------------------------------*/
+/** @defgroup TIMEx_Exported_Types TIM Extended Exported Types
+  * @{
+  */
+
+/**
+  * @brief  TIM Hall sensor Configuration Structure definition
+  */
+
+typedef struct
+{
+  uint32_t IC1Polarity;         /*!< Specifies the active edge of the input signal.
+                                     This parameter can be a value of @ref TIM_Input_Capture_Polarity */
+
+  uint32_t IC1Prescaler;        /*!< Specifies the Input Capture Prescaler.
+                                     This parameter can be a value of @ref TIM_Input_Capture_Prescaler */
+
+  uint32_t IC1Filter;           /*!< Specifies the input capture filter.
+                                     This parameter can be a number between Min_Data = 0x0 and Max_Data = 0xF */
+
+  uint32_t Commutation_Delay;   /*!< Specifies the pulse value to be loaded into the Capture Compare Register.
+                                     This parameter can be a number between Min_Data = 0x0000 and Max_Data = 0xFFFF */
+} TIM_HallSensor_InitTypeDef;
+/**
+  * @}
+  */
+/* End of exported types -----------------------------------------------------*/
+
+/* Exported constants --------------------------------------------------------*/
+/** @defgroup TIMEx_Exported_Constants TIM Extended Exported Constants
+  * @{
+  */
+
+/** @defgroup TIMEx_Remap TIM Extended Remapping
+  * @{
+  */
+/**
+  * @}
+  */
+
+/**
+  * @}
+  */
+/* End of exported constants -------------------------------------------------*/
+
+/* Exported macro ------------------------------------------------------------*/
+/** @defgroup TIMEx_Exported_Macros TIM Extended Exported Macros
+  * @{
+  */
+
+/**
+  * @}
+  */
+/* End of exported macro -----------------------------------------------------*/
+
+/* Private macro -------------------------------------------------------------*/
+/** @defgroup TIMEx_Private_Macros TIM Extended Private Macros
+  * @{
+  */
+
+/**
+  * @}
+  */
+/* End of private macro ------------------------------------------------------*/
+
+/* Exported functions --------------------------------------------------------*/
+/** @addtogroup TIMEx_Exported_Functions TIM Extended Exported Functions
+  * @{
+  */
+
+/** @addtogroup TIMEx_Exported_Functions_Group1 Extended Timer Hall Sensor functions
+  *  @brief    Timer Hall Sensor functions
+  * @{
+  */
+/*  Timer Hall Sensor functions  **********************************************/
+HAL_StatusTypeDef HAL_TIMEx_HallSensor_Init(TIM_HandleTypeDef *htim, TIM_HallSensor_InitTypeDef *sConfig);
+HAL_StatusTypeDef HAL_TIMEx_HallSensor_DeInit(TIM_HandleTypeDef *htim);
+
+void HAL_TIMEx_HallSensor_MspInit(TIM_HandleTypeDef *htim);
+void HAL_TIMEx_HallSensor_MspDeInit(TIM_HandleTypeDef *htim);
+
+/* Blocking mode: Polling */
+HAL_StatusTypeDef HAL_TIMEx_HallSensor_Start(TIM_HandleTypeDef *htim);
+HAL_StatusTypeDef HAL_TIMEx_HallSensor_Stop(TIM_HandleTypeDef *htim);
+/* Non-Blocking mode: Interrupt */
+HAL_StatusTypeDef HAL_TIMEx_HallSensor_Start_IT(TIM_HandleTypeDef *htim);
+HAL_StatusTypeDef HAL_TIMEx_HallSensor_Stop_IT(TIM_HandleTypeDef *htim);
+/* Non-Blocking mode: DMA */
+HAL_StatusTypeDef HAL_TIMEx_HallSensor_Start_DMA(TIM_HandleTypeDef *htim, uint32_t *pData, uint16_t Length);
+HAL_StatusTypeDef HAL_TIMEx_HallSensor_Stop_DMA(TIM_HandleTypeDef *htim);
+/**
+  * @}
+  */
+
+/** @addtogroup TIMEx_Exported_Functions_Group2 Extended Timer Complementary Output Compare functions
+  *  @brief   Timer Complementary Output Compare functions
+  * @{
+  */
+/*  Timer Complementary Output Compare functions  *****************************/
+/* Blocking mode: Polling */
+HAL_StatusTypeDef HAL_TIMEx_OCN_Start(TIM_HandleTypeDef *htim, uint32_t Channel);
+HAL_StatusTypeDef HAL_TIMEx_OCN_Stop(TIM_HandleTypeDef *htim, uint32_t Channel);
+
+/* Non-Blocking mode: Interrupt */
+HAL_StatusTypeDef HAL_TIMEx_OCN_Start_IT(TIM_HandleTypeDef *htim, uint32_t Channel);
+HAL_StatusTypeDef HAL_TIMEx_OCN_Stop_IT(TIM_HandleTypeDef *htim, uint32_t Channel);
+
+/* Non-Blocking mode: DMA */
+HAL_StatusTypeDef HAL_TIMEx_OCN_Start_DMA(TIM_HandleTypeDef *htim, uint32_t Channel, uint32_t *pData, uint16_t Length);
+HAL_StatusTypeDef HAL_TIMEx_OCN_Stop_DMA(TIM_HandleTypeDef *htim, uint32_t Channel);
+/**
+  * @}
+  */
+
+/** @addtogroup TIMEx_Exported_Functions_Group3 Extended Timer Complementary PWM functions
+  *  @brief    Timer Complementary PWM functions
+  * @{
+  */
+/*  Timer Complementary PWM functions  ****************************************/
+/* Blocking mode: Polling */
+HAL_StatusTypeDef HAL_TIMEx_PWMN_Start(TIM_HandleTypeDef *htim, uint32_t Channel);
+HAL_StatusTypeDef HAL_TIMEx_PWMN_Stop(TIM_HandleTypeDef *htim, uint32_t Channel);
+
+/* Non-Blocking mode: Interrupt */
+HAL_StatusTypeDef HAL_TIMEx_PWMN_Start_IT(TIM_HandleTypeDef *htim, uint32_t Channel);
+HAL_StatusTypeDef HAL_TIMEx_PWMN_Stop_IT(TIM_HandleTypeDef *htim, uint32_t Channel);
+/* Non-Blocking mode: DMA */
+HAL_StatusTypeDef HAL_TIMEx_PWMN_Start_DMA(TIM_HandleTypeDef *htim, uint32_t Channel, uint32_t *pData, uint16_t Length);
+HAL_StatusTypeDef HAL_TIMEx_PWMN_Stop_DMA(TIM_HandleTypeDef *htim, uint32_t Channel);
+/**
+  * @}
+  */
+
+/** @addtogroup TIMEx_Exported_Functions_Group4 Extended Timer Complementary One Pulse functions
+  *  @brief    Timer Complementary One Pulse functions
+  * @{
+  */
+/*  Timer Complementary One Pulse functions  **********************************/
+/* Blocking mode: Polling */
+HAL_StatusTypeDef HAL_TIMEx_OnePulseN_Start(TIM_HandleTypeDef *htim, uint32_t OutputChannel);
+HAL_StatusTypeDef HAL_TIMEx_OnePulseN_Stop(TIM_HandleTypeDef *htim, uint32_t OutputChannel);
+
+/* Non-Blocking mode: Interrupt */
+HAL_StatusTypeDef HAL_TIMEx_OnePulseN_Start_IT(TIM_HandleTypeDef *htim, uint32_t OutputChannel);
+HAL_StatusTypeDef HAL_TIMEx_OnePulseN_Stop_IT(TIM_HandleTypeDef *htim, uint32_t OutputChannel);
+/**
+  * @}
+  */
+
+/** @addtogroup TIMEx_Exported_Functions_Group5 Extended Peripheral Control functions
+  *  @brief    Peripheral Control functions
+  * @{
+  */
+/* Extended Control functions  ************************************************/
+HAL_StatusTypeDef HAL_TIMEx_ConfigCommutEvent(TIM_HandleTypeDef *htim, uint32_t  InputTrigger,
+                                              uint32_t  CommutationSource);
+HAL_StatusTypeDef HAL_TIMEx_ConfigCommutEvent_IT(TIM_HandleTypeDef *htim, uint32_t  InputTrigger,
+                                                 uint32_t  CommutationSource);
+HAL_StatusTypeDef HAL_TIMEx_ConfigCommutEvent_DMA(TIM_HandleTypeDef *htim, uint32_t  InputTrigger,
+                                                  uint32_t  CommutationSource);
+HAL_StatusTypeDef HAL_TIMEx_MasterConfigSynchronization(TIM_HandleTypeDef *htim,
+                                                        TIM_MasterConfigTypeDef *sMasterConfig);
+HAL_StatusTypeDef HAL_TIMEx_ConfigBreakDeadTime(TIM_HandleTypeDef *htim,
+                                                TIM_BreakDeadTimeConfigTypeDef *sBreakDeadTimeConfig);
+HAL_StatusTypeDef HAL_TIMEx_RemapConfig(TIM_HandleTypeDef *htim, uint32_t Remap);
+/**
+  * @}
+  */
+
+/** @addtogroup TIMEx_Exported_Functions_Group6 Extended Callbacks functions
+  * @brief    Extended Callbacks functions
+  * @{
+  */
+/* Extended Callback **********************************************************/
+void HAL_TIMEx_CommutCallback(TIM_HandleTypeDef *htim);
+void HAL_TIMEx_CommutHalfCpltCallback(TIM_HandleTypeDef *htim);
+void HAL_TIMEx_BreakCallback(TIM_HandleTypeDef *htim);
+/**
+  * @}
+  */
+
+/** @addtogroup TIMEx_Exported_Functions_Group7 Extended Peripheral State functions
+  * @brief    Extended Peripheral State functions
+  * @{
+  */
+/* Extended Peripheral State functions  ***************************************/
+HAL_TIM_StateTypeDef HAL_TIMEx_HallSensor_GetState(TIM_HandleTypeDef *htim);
+HAL_TIM_ChannelStateTypeDef HAL_TIMEx_GetChannelNState(TIM_HandleTypeDef *htim,  uint32_t ChannelN);
+/**
+  * @}
+  */
+
+/**
+  * @}
+  */
+/* End of exported functions -------------------------------------------------*/
+
+/* Private functions----------------------------------------------------------*/
+/** @addtogroup TIMEx_Private_Functions TIMEx Private Functions
+  * @{
+  */
+void TIMEx_DMACommutationCplt(DMA_HandleTypeDef *hdma);
+void TIMEx_DMACommutationHalfCplt(DMA_HandleTypeDef *hdma);
+/**
+  * @}
+  */
+/* End of private functions --------------------------------------------------*/
+
+/**
+  * @}
+  */
+
+/**
+  * @}
+  */
+
+#ifdef __cplusplus
+}
+#endif
+
+
+#endif /* STM32F1xx_HAL_TIM_EX_H */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/