使用I2C读取AT24C02数据，写入数据逻辑波形不正确？

2017-4-26 09:39:41

许华 ( 楼主 ) 2017-4-26 09:39:41 只看该作者 29511 | 0 倒序浏览

使用SDK自带的I2C去读取AT24C02过程中，使用逻辑分析仪看波形写入的数据与逻辑波形不对，写入0x55，波形显示不是写入值。谁知道怎么处理请帮忙看看我写错了吗？

//////////////////I2C部分/////////////////////////////
/**
******************************************************************************
* @file apds9930.c
* @author  William Xu
* @version V1.0.0
* @date 17-Mar-2015
* @brief apds9930 user controller operation
******************************************************************************
*  UNPUBLISHED PROPRIETARY SOURCE CODE
*  Copyright (c) 2016 MXCHIP Inc.
*
*  The contents of this file may not be disclosed to third parties, copied or
*  duplicated in any form, in whole or in part, without the prior written
*  permission of MXCHIP Corporation.
******************************************************************************
*/

#include "mico.h"
#include "AT24CXX.h"

#define apds9930_log(M, ...) custom_log("APDS9930", M, ##__VA_ARGS__)

/************** I2C/SPI buffer length ******/
#define AT24CXX_BUFFER_LEN 3
#define AT24CXX_ID 0xA0

/* I2C device */
mico_i2c_device_t AT24CXX_i2c_device = {
  AT24CXX_I2C_DEVICE, AT24CXX_ID, I2C_ADDRESS_WIDTH_7BIT, I2C_STANDARD_SPEED_MODE
};
mico_i2c_device_t AT24CXX_i2c_device0 = {
  AT24CXX_I2C_DEVICE, AT24CXX_ID+1, I2C_ADDRESS_WIDTH_7BIT, I2C_STANDARD_SPEED_MODE
};
/*************************************************
* Function:  AT24CXX_I2C写
* parameter:
            uint8_t reg_addr       地址
            uint8_t *reg_data       参数
            uint8_t cnt             个数
* Return  :  返回0
* Modify:
**************************************************/
OSStatus AT24CXX_I2C_bus_write(uint8_t reg_addr, uint8_t *reg_data, uint8_t cnt)
{
  OSStatus err = kNoErr;
  mico_i2c_message_t apds_i2c_msg = {NULL, NULL, 0, 0, 0, false};

  uint8_t array[AT24CXX_BUFFER_LEN];
  uint8_t stringpos;
  array[0] = reg_addr;
  for (stringpos = 0; stringpos < cnt; stringpos++) {
      array[stringpos + 1] = *(reg_data + stringpos);
  }

  err = MicoI2cBuildTxMessage(&apds_i2c_msg, array, cnt + 1, 3);
  require_noerr( err, exit );
  err = MicoI2cTransfer(&AT24CXX_i2c_device, &apds_i2c_msg, 1);
  require_noerr( err, exit );

exit:
  return err;
}
/*************************************************
* Function:  AT24CXX_I2C读
* parameter:
            uint8_t reg_addr       地址
            uint8_t *reg_data       参数
            uint8_t cnt             个数
* Return  :  返回0
* Modify:
**************************************************/
OSStatus AT24CXX_I2C_bus_read(uint8_t *reg_data, uint8_t cnt)
{
  OSStatus err = kNoErr;
  mico_i2c_message_t apds_i2c_msg = {NULL, NULL, 0, 0, 0, false};

  err = MicoI2cBuildRxMessage(&apds_i2c_msg, reg_data, cnt, 3);
  require_noerr( err, exit );
  err = MicoI2cTransfer(&AT24CXX_i2c_device0, &apds_i2c_msg, 1);
  require_noerr( err, exit );

exit:
  return err;
}
/*************************************************
* Function:  AT24CXX_I2C写一个字节
* parameter:
            uint8_t reg_addr       地址
            uint8_t reg_data       参数
* Return  :  返回0
* Modify:
**************************************************/
OSStatus AT24CXX_Write_RegData(uint8_t reg_addr, uint8_t reg_data)
{
OSStatus err = kNoErr;
err = AT24CXX_I2C_bus_write(reg_addr,®_data,1);
  return err;
}
/*************************************************
* Function:  AT24CXX_I2C读一个字节
* parameter:
            uint8_t reg_addr       地址
            uint8_t *reg_data       参数
* Return  :  返回0
* Modify:
**************************************************/
OSStatus AT24CXX_Read_RegData(uint8_t reg_addr, uint8_t *reg_data)
{
  OSStatus err = kNoErr;
  err = AT24CXX_I2C_bus_write(reg_addr, NULL, 0);
  /*Should have delay time here*/
  mico_thread_msleep(5);
  err = AT24CXX_I2C_bus_read(reg_data, 1);
  return err;
}
/*************************************************
* Function:  AT24CXX_I2C读一个字节
* parameter:
            uint8_t reg_addr       地址
            uint8_t *reg_data       参数
* Return  :  返回0
* Modify:
**************************************************/
//OSStatus AT24CXX_Read_one(uint8_t Write_addr,uint8_t Write_Data)
//{
//  OSStatus err = kNoErr;
//  err = AT24CXX_Write_RegData(Write_addr,Write_Data);
// return err;
//}

OSStatus AT24CXX_sensor_init(void)
{
  OSStatus err = kNoErr;
//  uint8_t device_id;

  MicoI2cFinalize(&AT24CXX_i2c_device);

  /*int Si7021 sensor i2c device*/
  err = MicoI2cInitialize(&AT24CXX_i2c_device);
  require_noerr_action( err, exit, apds9930_log("Si7021_ERROR: MicoI2cInitialize err = %d.", err) );

  if( false == MicoI2cProbeDevice(&AT24CXX_i2c_device, 5) ){
apds9930_log("Si7021_ERROR: no i2c device found!");
err = kNotFoundErr;
goto exit;
  }
else
{
   apds9930_log("Catch I2C device!");

}
exit:
  return err;
}

OSStatus AT24CXX_sensor_deinit(void)
{
  OSStatus err = kUnknownErr;

  err = MicoI2cFinalize(&AT24CXX_i2c_device);
  require_noerr_action( err, exit, apds9930_log("Si7021_ERROR: MicoI2cFinalize err = %d.", err));

exit:
  return err;
}
//////////////调用部分/////////////////////////////

#include "mico.h"
#include "micokit_ext.h"
#include "json_c/json.h"
#include "sensor/DHT11/DHT11.h" /*温湿度传感器相关头文件*/

#define wifi_station_log(M, ...) custom_log("WIFI", M, ##__VA_ARGS__)
#define ext_rgb_led_log(M,...) custom_log("EXT", M, ##__VA_ARGS__)
#define COLOR_MODE RGB_MODE

mico_thread_t t_handler = NULL;/*线程句柄*/
mico_rtc_time_t cur_time = { 0 };
unsigned char APPD = 0,SDD=25;
typedef struct
{
unsigned char Alarm_N;       //闹铃个数
unsigned char Time_Alarm[3];
unsigned char WeekDays_DATA:3;
// unsigned char
}Time_Data;
typedef struct notify
{
  uint8_t cmd;
} notify;
Time_Data Time_Run;

static int isMqttThreadEnter = 0;
/*************************************************
* Function:  2^N计算函数
* parameter
* Return    sum计算的结果
* Modify:
**************************************************/
unsigned char Mult2(unsigned char n)
{
  unsigned char sum = 2,m;
  if(n==0) return 1;
  for(m=1;m$ E6 {+ ]/ ?: y: o, p1 x
  return sum;
}

/*************************************************
* Function:  RTC初始化函数
* parameter
* Return
* Modify:
**************************************************/
void RTC_Time_Init(void)
{
  cur_time.year = 17; //设置时间
  cur_time.month = 3;
  cur_time.date = 23;
  cur_time.weekday = 4;
  cur_time.hr = 23;
  cur_time.min = 58;
  cur_time.sec = 0;
  Time_Run.WeekDays_DATA =cur_time.weekday;
  MicoRtcSetTime(&cur_time);          //初始化 RTC 时钟的时间
}
/*************************************************
* Function:  RTC时间允许读取函数
* parameter
* Return
* Modify:
**************************************************/
void RTC_Time_Run(unsigned int arg)
{
  RTC_Time_Init();
while(1)
{
  MicoRtcGetTime(&cur_time); //返回新的时间值
  sleep(1000);
}
}

static void micoNotify_ConnectFailedHandler(OSStatus err, void* inContext)
{
  wifi_station_log("join Wlan failed Err: %d", err);
}

static void mqtt_proc(mico_thread_arg_t arg)
{
  wifi_station_log("start running mqtt_proc thread");
//easylink_extra_data;
  mqtt_client_demo();
  wifi_station_log("end running mqtt_proc thread");
  mico_rtos_delete_thread(NULL);
}

static void micoNotify_WifiStatusHandler(WiFiEvent event,  void* inContext)
{
  APPD = 1;
  switch (event)
  {
  case NOTIFY_STATION_UP:
wifi_station_log("Station up");

  //  wifi_station_log(da);
//aliyun_iot_mqtt_network_event_callback(ALI_IOT_NETWORK_CONNECTED, NULL);
if(1 == isMqttThreadEnter)
{
   wifi_station_log("mqtt thread already running");
   return;
}
mico_thread_t threadHandle;
mico_rtos_create_thread(&threadHandle, 1, "mqtt_thread", mqtt_proc, 1024*16, NULL);
isMqttThreadEnter++;
break;

break;
  case NOTIFY_STATION_DOWN:
wifi_station_log("Station down");
break;
  default:
break;
  }
}

int application_start( void )
{
  OSStatus err = kNoErr;
  char str[10] = {0};
  unsigned char sssf[2]={0};
// mico_thread_t t_handler = NULL;/*线程句柄*/
  MicoInit();

  AT24CXX_sensor_init();//初始化I2C
  /* Start MiCO system functions according to mico_config.h,
   Define macro MICO_WLAN_CONNECTION_ENABLE to enable wlan connection function
   Select wlan configuration mode: MICO_CONFIG_MODE
   Define EasyLink settings */
  err = mico_system_init( mico_system_context_init( 0 ) );                   //

  /* Register user function when wlan connection status is changed */
  err = mico_system_notify_register( mico_notify_WIFI_STATUS_CHANGED, (void *)micoNotify_WifiStatusHandler, NULL );

  /* Register user function when wlan connection is faile in one attempt */
  err = mico_system_notify_register( mico_notify_WIFI_CONNECT_FAILED, (void *)micoNotify_ConnectFailedHandler, NULL );

   err = mico_rtos_create_thread(NULL,MICO_APPLICATION_PRIORITY,"RTC Time Run",RTC_Time_Run,500,NULL);//创建并启动一个新的线程

  ext_rgb_led_log("rgb led conrtol demo(RGB_MODE)");

  /*LED1初始化*/
  err = RUN_LED_init();

  /* 初始化直流电机 */
//  err = dc_motor_init();

  /*初始化温度湿度*/
//  err = DHT11_Init();
  AT24CXX_Write_RegData(0x00,0X55);
//  AT24CXX_Read_RegData(0x00,sssf);
  APPD =0x55;//sssf[0];
  ext_rgb_led_log("%d",APPD);
//  sprintf(str,"%d",APPD);
  /*初始化光发射二极管*/
  OLED_Init();
  OLED_ShowString(0, 2,str);

  /*初始化光强传感器*/
//  err = light_sensor_init();

  /*按键初始化*/
//  GPIO_KEY_Init();

  mico_rtos_delete_thread(NULL);
  return err;
}

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使用I2C读取AT24C02数据，写入数据逻辑波形不正确？

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