DIY个人智能家庭网关——硬件篇之433M无线接收解码器（二）

为了降低DIY难度，我提供了方案二：采用现成的模块来搭建解码器，需要如下模块

1、STM8S103F单片机模块和编程器

2、433M无线接收模块

3、PL2303 USB转串口模块

或带线的

另外还需要一些杜邦线用来连接这些模块，这些东西都可以在淘宝上买得到。

STM8S103F代码如下

/********************************************************************************* @file    Project/main.c * @author  MCD Application Team* @version V2.1.0* @date    18-November-2011* @brief   Main program body******************************************************************************* @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>&copy; COPYRIGHT 2011 STMicroelectronics</center></h2>*******************************************************************************/ /* Includes ------------------------------------------------------------------*/
#include <stdio.h>
#include <string.h>
#include "stm8s.h"
#include "stm8s_exti.h"
#include "stm8s_it.h"
#include "stm8s_gpio.h"
#include "stm8s_tim2.h"
#include "stm8s_tim4.h"
#include "stm8s_uart1.h"/* Private defines -----------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/* Private functions ---------------------------------------------------------*/
#define LED_GPIO_PORT  (GPIOB)
#define LED_GPIO_PINS  (GPIO_PIN_5)#define PULS_LEVEL_HIGH      (1)
#define PULS_LEVEL_LOW      (0)#define DEBUG                   (1)#define USER_CODE_NUMBER_MAX    (10)
#define USER_CODE_INFO_MAGIC    (0x12345678)#define LED_ON        GPIO_WriteLow(GPIOB, GPIO_PIN_5)
#define LED_OFF       GPIO_WriteHigh(GPIOB, GPIO_PIN_5)
#define LED_REVERSE   GPIO_WriteReverse(GPIOB, GPIO_PIN_5)u32 code_addr;
u32 code = 0;
u32 puls_high = 0;
u32 puls_low = 0;
u8 current_puls_level=PULS_LEVEL_LOW;
u8 check_flag = 0;
u8 found_flag = 0;
s32 value = 0;
u32 last_code = 0;
u32 last_valid_code = 0;u32 puls_width_compare = 0;
u8 bit_count = 0;
u8 learn_flag = 0;
u32 learn_led_count = 0;
u32 timeout_count = 0;
u32 time_count = 0;u32 puls_high_time = 0;
u32 puls_low_time = 0;u32 button_down_count = 0;struct user_code_info
{u32   magic;u8    number;u16    code[USER_CODE_NUMBER_MAX];
};struct user_code_info user_info;/* Private defines -----------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/* Private functions ---------------------------------------------------------*/
void Init_GPIO(void)
{// led, PB5GPIO_Init(GPIOB, GPIO_PIN_5, GPIO_MODE_OUT_PP_LOW_FAST);LED_OFF;// 433M signal input, PC3, pull up, interruptGPIO_Init(GPIOC, GPIO_PIN_3, GPIO_MODE_IN_FL_IT);EXTI_DeInit();EXTI_SetExtIntSensitivity(EXTI_PORT_GPIOC, EXTI_SENSITIVITY_RISE_FALL);//falling and rising// buttonGPIO_Init(GPIOC, GPIO_PIN_4, GPIO_MODE_IN_PU_NO_IT);// ouput gpioGPIO_Init(GPIOC, GPIO_PIN_5, GPIO_MODE_OUT_PP_LOW_FAST);GPIO_WriteLow(GPIOC, GPIO_PIN_5);GPIO_Init(GPIOC, GPIO_PIN_6, GPIO_MODE_OUT_PP_LOW_FAST);GPIO_WriteLow(GPIOC, GPIO_PIN_6);GPIO_Init(GPIOC, GPIO_PIN_7, GPIO_MODE_OUT_PP_LOW_FAST);GPIO_WriteLow(GPIOC, GPIO_PIN_7);GPIO_Init(GPIOD, GPIO_PIN_2, GPIO_MODE_OUT_PP_LOW_FAST);GPIO_WriteLow(GPIOD, GPIO_PIN_2);
}void Init_Timer4(void)
{TIM4_ARRPreloadConfig(ENABLE);TIM4_TimeBaseInit(TIM4_PRESCALER_8, 0xff);//TIM4_ClearFlag(TIM4_FLAG_UPDATE);TIM4_ITConfig(TIM4_IT_UPDATE, ENABLE);//TIM4_Cmd(ENABLE);
}void Init_Timer2(void)
{TIM2_DeInit();TIM2_TimeBaseInit(TIM2_PRESCALER_64,0xFFFF);TIM2_ITConfig(TIM2_IT_UPDATE , ENABLE);TIM2_SetCounter(0); TIM2_Cmd(ENABLE);
}void Init_Clk(void)
{CLK_DeInit();CLK_HSICmd(ENABLE);CLK_HSIPrescalerConfig(CLK_PRESCALER_HSIDIV2);Init_Timer2();
}#if DEBUG
void Init_UART1(void)
{UART1_DeInit();UART1_Init((u32)9600, UART1_WORDLENGTH_8D, UART1_STOPBITS_1, UART1_PARITY_NO, UART1_SYNCMODE_CLOCK_DISABLE, UART1_MODE_TX_ENABLE);UART1_Cmd(ENABLE);
}void UART1_Send(uint8_t dat)
{while(( UART1_GetFlagStatus(UART1_FLAG_TXE)==RESET));UART1_SendData8(dat);
}int putchar(int c)
{  UART1_Send((u8)c);return (c);
}
#endifvoid delay_ms(u32 t)
{u32 i;for(;t>0;t--)for(i=0xFF;i>0;i--);
}void Init_EEPROM(void)
{FLASH_DeInit();FLASH_Unlock(FLASH_MEMTYPE_DATA);FLASH_SetProgrammingTime(FLASH_PROGRAMTIME_STANDARD);
}void read_user_code_info(struct user_code_info *info)
{u32 addr = FLASH_DATA_START_PHYSICAL_ADDRESS;u8 i;u8 *p = (u8 *)info;for(i =0;i<sizeof(struct user_code_info);i++){*p = FLASH_ReadByte(addr+i);p++;}
}void write_user_code_info(struct user_code_info *info)
{u32 addr = FLASH_DATA_START_PHYSICAL_ADDRESS;u8 i;u8 *p = (u8 *)info;for(i =0;i<sizeof(struct user_code_info);i++){FLASH_ProgramByte(addr+i, *p);p++;}
}void dump_user_code_info(struct user_code_info *info)
{u8 i;printf("magic:0x%lx\r\n", info->magic);printf("number:%d\r\n", info->number);for(i=0;i<info->number;i++){printf("code[%d]:0x%04x\r\n", i, info->code[i]);}}void save_new_code(struct user_code_info *info, u16 code)
{u8 i;for(i = 0;i<info->number;i++){if(info->code[i] == code)return;}if(info->number < USER_CODE_NUMBER_MAX){info->code[info->number] = code;info->number++;}else{for(i=1;i<USER_CODE_NUMBER_MAX;i++){info->code[i-1] = info->code[i];}info->code[USER_CODE_NUMBER_MAX-1] = code;}write_user_code_info(&user_info); dump_user_code_info(&user_info);
}void my_job(u8 channel)
{switch(channel){case 1:GPIO_WriteReverse(GPIOC, GPIO_PIN_5);break;case 2:GPIO_WriteReverse(GPIOC, GPIO_PIN_6);break;case 3:GPIO_WriteReverse(GPIOC, GPIO_PIN_7);break;case 4:GPIO_WriteReverse(GPIOD, GPIO_PIN_2);break;default:break;}
}#if 0
void handle_code(u32 code)
{u16 addr = code >> 8;u8 data = code & 0xFF;s8 channel = -1;  // PT6624 chipif(data == 0xC0 || data == 0x30 || data == 0x0C || data == 0x03){switch(data){case 0xC0:channel = 1;break;case 0x30:channel = 2;break;case 0x0C:channel = 3;break;case 0x03:channel = 4;break;default: break;      }}else // other chip{switch(data&0x0F){case 0x08:channel = 1;break;case 0x04:channel = 2;break;case 0x02:channel = 3;break;case 0x01:channel = 4;break;default: break;          }}if(learn_flag){save_new_code(&user_info, addr);learn_flag = 0;}else{u8 i;if(user_info.number==0){return;}else{for(i = 0;i < user_info.number;i++){if(user_info.code[i] == addr){my_job(channel);LED_ON;delay_ms(100);LED_OFF;delay_ms(300);              }}}}#if DEBUG  printf("code:0x%lx addr:0x%04x data:0x%02x chan:%d\r\n", code, addr, data, channel);
#endif
}
#else
void handle_code(u32 code)
{u16 addr = code >> 8;u8 data = code & 0xFF;  //printf("addr:0x%04x data:0x%02x\n", addr, data); printf("{\"type\":\"trigger\", \"addr\":\"0x%04x\",\"data\":\"0x%02x\"}", addr, data);LED_ON;delay_ms(100);LED_OFF;delay_ms(400);
}
#endifvoid main(void)
{Init_Clk();Init_GPIO();Init_Timer2();Init_Timer4();Init_EEPROM();#if DEBUG      Init_UART1();
#endif      read_user_code_info(&user_info);if(user_info.magic != USER_CODE_INFO_MAGIC){memset(&user_info, 0, sizeof(user_info));user_info.magic = USER_CODE_INFO_MAGIC;user_info.number = 0;write_user_code_info(&user_info);}dump_user_code_info(&user_info);enableInterrupts();while (1){// buttonif(GPIO_ReadInputPin(GPIOC, GPIO_PIN_4)==0){button_down_count++;          }else{// long press, 3 secondsif(button_down_count > 80000){user_info.number = 0;write_user_code_info(&user_info);learn_flag = 0;u8 i;for(i = 0;i<5;i++){LED_REVERSE;delay_ms(80);}LED_OFF;}  // short presselse if(button_down_count > 10000){learn_flag = !learn_flag;}button_down_count = 0;}if(check_flag){if(found_flag == 0){if(puls_high_time>0){value = puls_low_time/puls_high_time;if(value > 24 && value < 35){found_flag =1;code = 0;bit_count = 0;}    }}else{     if(bit_count == 0){puls_width_compare = puls_high_time+puls_low_time;}value = puls_high_time+puls_low_time-puls_width_compare;if(value < 20 && value > -20){code <<= 1;if(puls_high_time > puls_low_time){code |= 0x1;}bit_count++;if(bit_count == 24){handle_code(code);found_flag = 0;}  }else{bit_count = 0;found_flag = 0;}}check_flag = 0;}if(learn_flag){learn_led_count++;if(learn_led_count == 4000){LED_REVERSE;learn_led_count = 0;}}else{LED_OFF;}}
}INTERRUPT_HANDLER(EXTI_PORTC_IRQHandler, 5)
{//LED_REVERSE;TIM2_Cmd(DISABLE);time_count += TIM2_GetCounter();if(GPIO_ReadInputPin(GPIOC, GPIO_PIN_3)){//LED_ON;if(check_flag != 1){  puls_low_time = time_count;check_flag = 1;         }}else{//LED_OFF;if(check_flag != 1){puls_high_time = time_count;}}  TIM2_SetCounter(0);time_count = 0;TIM2_Cmd(ENABLE);
}INTERRUPT_HANDLER(TIM4_UPD_OVF_IRQHandler, 23){static u32 i=0;i++;if(i==25){LED_OFF;      }else if(i>=150){TIM4_Cmd(DISABLE);i=0;last_valid_code = 0;}TIM4_ClearITPendingBit(TIM4_IT_UPDATE);}INTERRUPT_HANDLER(TIM2_UPD_OVF_BRK_IRQHandler, 13){/* In order to detect unexpected events during development,it is recommended to set a breakpoint on the following instruction.*///LED_REVERSE;time_count += 0xFFFF; TIM2_ClearITPendingBit(TIM2_IT_UPDATE);}#ifdef USE_FULL_ASSERT/*** @brief  Reports the name of the source file and the source line number*   where the assert_param error has occurred.* @param file: pointer to the source file name* @param line: assert_param error line source number* @retval : None*/
void assert_failed(u8* file, u32 line)
{ /* User can add his own implementation to report the file name and line number,ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) *//* Infinite loop */while (1){}
}
#endif/******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/

从代码中可以看到，解码成功后，把数据格式化成JSON，然后通过printf输出到串口，这样路由器就可以从USB串口读取到解码数据了。

项目源代码：http://pan.baidu.com/s/1mhMXuNQ 密码：f1e5

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