/**
******************************************************************************
* @file stm32f10x_tim.c
* @author MCD Application Team
* @version V3.5.0
* @date 11-March-2011
* @brief This file provides all the TIM firmware functions.
******************************************************************************
* @attention
*
* THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
* TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY
* DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
* FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
* CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
*
* <h2><center>© COPYRIGHT 2011 STMicroelectronics</center></h2>
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "stm32f10x_tim.h"
#include "stm32f10x_rcc.h"
/** @addtogroup STM32F10x_StdPeriph_Driver
* @{
*/
/** @defgroup TIM
* @brief TIM driver modules
* @{
*/
/** @defgroup TIM_Private_TypesDefinitions
* @{
*/
/**
* @}
*/
/** @defgroup TIM_Private_Defines
* @{
*/
/* ---------------------- TIM registers bit mask ------------------------ */
#define SMCR_ETR_Mask ((uint16_t)0x00FF)
#define CCMR_Offset ((uint16_t)0x0018)
#define CCER_CCE_Set ((uint16_t)0x0001)
#define CCER_CCNE_Set ((uint16_t)0x0004)
/**
* @}
*/
/** @defgroup TIM_Private_Macros
* @{
*/
/**
* @}
*/
/** @defgroup TIM_Private_Variables
* @{
*/
/**
* @}
*/
/** @defgroup TIM_Private_FunctionPrototypes
* @{
*/
static void TI1_Config(TIM_TypeDef* TIMx, uint16_t TIM_ICPolarity, uint16_t TIM_ICSelection,
uint16_t TIM_ICFilter);
static void TI2_Config(TIM_TypeDef* TIMx, uint16_t TIM_ICPolarity, uint16_t TIM_ICSelection,
uint16_t TIM_ICFilter);
static void TI3_Config(TIM_TypeDef* TIMx, uint16_t TIM_ICPolarity, uint16_t TIM_ICSelection,
uint16_t TIM_ICFilter);
static void TI4_Config(TIM_TypeDef* TIMx, uint16_t TIM_ICPolarity, uint16_t TIM_ICSelection,
uint16_t TIM_ICFilter);
/**
* @}
*/
/** @defgroup TIM_Private_Macros
* @{
*/
/**
* @}
*/
/** @defgroup TIM_Private_Variables
* @{
*/
/**
* @}
*/
/** @defgroup TIM_Private_FunctionPrototypes
* @{
*/
/**
* @}
*/
/** @defgroup TIM_Private_Functions
* @{
*/
/**
* @brief Deinitializes the TIMx peripheral registers to their default reset values.
* @param TIMx: where x can be 1 to 17 to select the TIM peripheral.
* @retval None
*/
void TIM_DeInit(TIM_TypeDef* TIMx)
{
/* Check the parameters */
assert_param(IS_TIM_ALL_PERIPH(TIMx));
if (TIMx == TIM1)
{
RCC_APB2PeriphResetCmd(RCC_APB2Periph_TIM1, ENABLE);
RCC_APB2PeriphResetCmd(RCC_APB2Periph_TIM1, DISABLE);
}
else if (TIMx == TIM2)
{
RCC_APB1PeriphResetCmd(RCC_APB1Periph_TIM2, ENABLE);
RCC_APB1PeriphResetCmd(RCC_APB1Periph_TIM2, DISABLE);
}
else if (TIMx == TIM3)
{
RCC_APB1PeriphResetCmd(RCC_APB1Periph_TIM3, ENABLE);
RCC_APB1PeriphResetCmd(RCC_APB1Periph_TIM3, DISABLE);
}
else if (TIMx == TIM4)
{
RCC_APB1PeriphResetCmd(RCC_APB1Periph_TIM4, ENABLE);
RCC_APB1PeriphResetCmd(RCC_APB1Periph_TIM4, DISABLE);
}
else if (TIMx == TIM5)
{
RCC_APB1PeriphResetCmd(RCC_APB1Periph_TIM5, ENABLE);
RCC_APB1PeriphResetCmd(RCC_APB1Periph_TIM5, DISABLE);
}
else if (TIMx == TIM6)
{
RCC_APB1PeriphResetCmd(RCC_APB1Periph_TIM6, ENABLE);
RCC_APB1PeriphResetCmd(RCC_APB1Periph_TIM6, DISABLE);
}
else if (TIMx == TIM7)
{
RCC_APB1PeriphResetCmd(RCC_APB1Periph_TIM7, ENABLE);
RCC_APB1PeriphResetCmd(RCC_APB1Periph_TIM7, DISABLE);
}
else if (TIMx == TIM8)
{
RCC_APB2PeriphResetCmd(RCC_APB2Periph_TIM8, ENABLE);
RCC_APB2PeriphResetCmd(RCC_APB2Periph_TIM8, DISABLE);
}
else if (TIMx == TIM9)
{
RCC_APB2PeriphResetCmd(RCC_APB2Periph_TIM9, ENABLE);
RCC_APB2PeriphResetCmd(RCC_APB2Periph_TIM9, DISABLE);
}
else if (TIMx == TIM10)
{
RCC_APB2PeriphResetCmd(RCC_APB2Periph_TIM10, ENABLE);
RCC_APB2PeriphResetCmd(RCC_APB2Periph_TIM10, DISABLE);
}
else if (TIMx == TIM11)
{
RCC_APB2PeriphResetCmd(RCC_APB2Periph_TIM11, ENABLE);
RCC_APB2PeriphResetCmd(RCC_APB2Periph_TIM11, DISABLE);
}
else if (TIMx == TIM12)
{
RCC_APB1PeriphResetCmd(RCC_APB1Periph_TIM12, ENABLE);
RCC_APB1PeriphResetCmd(RCC_APB1Periph_TIM12, DISABLE);
}
else if (TIMx == TIM13)
{
RCC_APB1PeriphResetCmd(RCC_APB1Periph_TIM13, ENABLE);
RCC_APB1PeriphResetCmd(RCC_APB1Periph_TIM13, DISABLE);
}
else if (TIMx == TIM14)
{
RCC_APB1PeriphResetCmd(RCC_APB1Periph_TIM14, ENABLE);
RCC_APB1PeriphResetCmd(RCC_APB1Periph_TIM14, DISABLE);
}
else if (TIMx == TIM15)
{
RCC_APB2PeriphResetCmd(RCC_APB2Periph_TIM15, ENABLE);
RCC_APB2PeriphResetCmd(RCC_APB2Periph_TIM15, DISABLE);
}
else if (TIMx == TIM16)
{
RCC_APB2PeriphResetCmd(RCC_APB2Periph_TIM16, ENABLE);
RCC_APB2PeriphResetCmd(RCC_APB2Periph_TIM16, DISABLE);
}
else
{
if (TIMx == TIM17)
{
RCC_APB2PeriphResetCmd(RCC_APB2Periph_TIM17, ENABLE);
RCC_APB2PeriphResetCmd(RCC_APB2Periph_TIM17, DISABLE);
}
}
}
/**
* @brief Initializes the TIMx Time Base Unit peripheral according to
* the specified parameters in the TIM_TimeBaseInitStruct.
* @param TIMx: where x can be 1 to 17 to select the TIM peripheral.
* @param TIM_TimeBaseInitStruct: pointer to a TIM_TimeBaseInitTypeDef
* structure that contains the configuration information for the
* specified TIM peripheral.
* @retval None
*/
void TIM_TimeBaseInit(TIM_TypeDef* TIMx, TIM_TimeBaseInitTypeDef* TIM_TimeBaseInitStruct)
{
uint16_t tmpcr1 = 0;
/* Check the parameters */
assert_param(IS_TIM_ALL_PERIPH(TIMx));
assert_param(IS_TIM_COUNTER_MODE(TIM_TimeBaseInitStruct->TIM_CounterMode));
assert_param(IS_TIM_CKD_DIV(TIM_TimeBaseInitStruct->TIM_ClockDivision));
tmpcr1 = TIMx->CR1;
if((TIMx == TIM1) || (TIMx == TIM8)|| (TIMx == TIM2) || (TIMx == TIM3)||
(TIMx == TIM4) || (TIMx == TIM5))
{
/* Select the Counter Mode */
tmpcr1 &= (uint16_t)(~((uint16_t)(TIM_CR1_DIR | TIM_CR1_CMS)));
tmpcr1 |= (uint32_t)TIM_TimeBaseInitStruct->TIM_CounterMode;
}
if((TIMx != TIM6) && (TIMx != TIM7))
{
/* Set the clock division */
tmpcr1 &= (uint16_t)(~((uint16_t)TIM_CR1_CKD));
tmpcr1 |= (uint32_t)TIM_TimeBaseInitStruct->TIM_ClockDivision;
}
TIMx->CR1 = tmpcr1;
/* Set the Autoreload value */
TIMx->ARR = TIM_TimeBaseInitStruct->TIM_Period ;
/* Set the Prescaler value */
TIMx->PSC = TIM_TimeBaseInitStruct->TIM_Prescaler;
if ((TIMx == TIM1) || (TIMx == TIM8)|| (TIMx == TIM15)|| (TIMx == TIM16) || (TIMx == TIM17))
{
/* Set the Repetition Counter value */
TIMx->RCR = TIM_TimeBaseInitStruct->TIM_RepetitionCounter;
}
/* Generate an update event to reload the Prescaler and the Repetition counter
values immediately */
TIMx->EGR = TIM_PSCReloadMode_Immediate;
}
/**
* @brief Initializes the TIMx Channel1 according to the specified
* parameters in the TIM_OCInitStruct.
* @param TIMx: where x can be 1 to 17 except 6 and 7 to select the TIM peripheral.
* @param TIM_OCInitStru
stm32+esp8266-WiFi收发json数据
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更新于2024-02-28
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STM32与ESP8266的组合在物联网应用中非常常见,它们可以协同工作,实现设备通过WiFi进行数据通信。在这个项目中,STM32(STM32F103C8T6)作为主控器,负责处理较低级别的控制任务,而ESP8266则作为一个低成本、低功耗的WiFi模组,负责提供无线网络连接。两者通过串行通信接口(如UART)交互,实现TCP/IP协议栈的功能。
STM32F103C8T6是STM32系列的一款基础型微控制器,具有高性能的ARM Cortex-M3内核,内部集成有闪存和SRAM,以及丰富的外设接口,如GPIO、SPI、I2C、USART等,非常适合于嵌入式开发。
在该项目中,ESP8266被配置为TCP客户端,连接到特定的服务器,并建立一个持久的TCP连接。TCP是一种面向连接的、可靠的传输层协议,适合于大数据量和稳定性的传输需求,如JSON数据。JSON(JavaScript Object Notation)是一种轻量级的数据交换格式,易于人阅读和编写,同时也易于机器解析和生成,是物联网设备间常用的数据传输格式。
发送JSON数据时,STM32将要发送的JSON字符串通过UART发送给ESP8266,ESP8266再通过WiFi将数据封装在TCP报文中发送出去。接收端服务器解析接收到的JSON数据,进行业务逻辑处理后,可能也会返回JSON数据。ESP8266接收到这些数据,通过UART转发给STM32,STM32解析这些数据并执行相应的操作。
代码自创且代码量极少,表明开发者可能通过高效编程实现了这一功能,使得整个程序结构清晰,易于理解和维护。没有错误报告,说明在开发过程中已经进行了充分的测试,确保了系统的稳定性和可靠性。
实现这个功能的关键在于理解TCP/IP协议栈的工作原理,包括连接建立、数据传输和连接关闭的三次握手和四次挥手过程。同时,还需要熟悉JSON的语法和解析方法,例如使用开源库如cJSON来处理JSON数据。在STM32端,需要正确配置UART参数,确保与ESP8266之间的通信顺畅;在ESP8266端,需要设置恰当的WiFi模式和TCP客户端参数。
总结来说,这个项目展示了如何利用STM32和ESP8266的组合实现基于TCP的WiFi通信,并通过JSON格式交换数据。这种技术在智能家居、工业自动化等领域有广泛的应用,对于学习嵌入式系统开发和物联网通信技术的人来说,是一个很好的实践案例。
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