PCF8563 40秒出现跳变

sapoiuyt · 发表于 2016-9-12 16:00:45

用IO口模拟I2C 外面接3.3V 4.7K的上拉电阻，现在出现20秒和40秒的时候小时和日期开始出现跳变。而回到0秒的时候又正常，有人遇到同样的问题吗？

sapoiuyt · 发表于 2016-9-12 16:00:46

已经找到原因 40秒对应的是值是100 0000 第7位出现1 而影响到其他值。证明这PCF8563里面是没有清空再发送数据的。这是一个问题在获取数据后屏蔽对应的数据位就可以了 & 0x3f 等等

liarlaker · 发表于 2016-9-12 16:34:06

我都用内置上拉了，少焊两个电阻，何乐不为呢？你把程序传上来看看

sapoiuyt · 发表于 2016-9-12 16:44:07

liarlaker 发表于 2016-9-12 16:34
我都用内置上拉了，少焊两个电阻，何乐不为呢？你把程序传上来看看

使用了内部的上拉也一样的效果

sapoiuyt · 发表于 2016-9-12 16:47:09

void I2C_GPIO_Config(void)
{
   uint8_t i;
   GPIO_InitTypeDef  GPIO_InitStructure;

   RCC_AHB1PeriphClockCmd( RCC_AHB1Periph_GPIOF, ENABLE);
   GPIO_InitStructure.GPIO_Pin = I2C_SCL|I2C_SDA;
   GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
   GPIO_InitStructure.GPIO_OType = GPIO_OType_OD;

   GPIO_InitStructure.GPIO_Speed = GPIO_Speed_25MHz;
   GPIO_InitStructure.GPIO_PuPd =  GPIO_PuPd_UP;

   GPIO_Init(GPIOF, &GPIO_InitStructure);
}

u8 PCF8563_SetDate(u8 PCF_Format, RTC_DateTypeDef* PCF_DataStruct)
{
RTC_DateTypeDef SetDate_Stu;
u8 ret = TRUE;

if(PCF_Format == PCF_Format_HEX) // 16进制
{
   // 转换BCD 码
SetDate_Stu.RTC_Year = RTC_HexToBcd(PCF_DataStruct->RTC_Year);
SetDate_Stu.RTC_Month  = RTC_HexToBcd(PCF_DataStruct->RTC_Month);
SetDate_Stu.RTC_Date = RTC_HexToBcd(PCF_DataStruct->RTC_Date);
SetDate_Stu.RTC_WeekDay = RTC_HexToBcd(PCF_DataStruct->RTC_WeekDay);

}
else if(PCF_Format == PCF_Format_BCD)  // BCD 码
{
SetDate_Stu.RTC_Year  = (PCF_DataStruct->RTC_Year);
SetDate_Stu.RTC_Month  = (PCF_DataStruct->RTC_Month);
SetDate_Stu.RTC_Date  = (PCF_DataStruct->RTC_Date);
SetDate_Stu.RTC_WeekDay  = (PCF_DataStruct->RTC_WeekDay);
}

// 写进PCF8563
ret = Rtc8563Write(PCF8563_Address_Years,SetDate_Stu.RTC_Year);
if(ret == FALSE)
goto ERROR;

ret = Rtc8563Write(PCF8563_Address_Months,SetDate_Stu.RTC_Month);
if(ret == FALSE)
goto ERROR;

ret = Rtc8563Write(PCF8563_Address_Days,SetDate_Stu.RTC_Date);
if(ret == FALSE)
goto ERROR;

ret = Rtc8563Write(PCF8563_Address_WeekDays,SetDate_Stu.RTC_WeekDay);
if(ret == FALSE)
goto ERROR;

return TRUE;

ERROR:
return FALSE;
}

u8 PCF8563_SetTime(u8 PCF_Format, RTC_TimeTypeDef* PCF_TimeStruct)
{
RTC_TimeTypeDef SetTime_Stu;
u8 ret = TRUE;

if(PCF_Format == PCF_Format_HEX) // 16进制
{
   // 转换BCD 码
SetTime_Stu.RTC_Hours  = RTC_HexToBcd(PCF_TimeStruct->RTC_Hours);
SetTime_Stu.RTC_Minutes  = RTC_HexToBcd(PCF_TimeStruct->RTC_Minutes);
SetTime_Stu.RTC_Seconds  = RTC_HexToBcd(PCF_TimeStruct->RTC_Seconds);

}
else if(PCF_Format == PCF_Format_BCD)  // BCD 码
{
SetTime_Stu.RTC_Hours  = (PCF_TimeStruct->RTC_Hours);
SetTime_Stu.RTC_Minutes  = (PCF_TimeStruct->RTC_Minutes);
SetTime_Stu.RTC_Seconds  = (PCF_TimeStruct->RTC_Seconds);
}

// 写进PCF8563
ret = Rtc8563Write(PCF8563_Alarm_Hours,SetTime_Stu.RTC_Hours);
if(ret == FALSE)
goto ERROR;

ret = Rtc8563Write(PCF8563_Address_Minutes,SetTime_Stu.RTC_Minutes);
if(ret == FALSE)
goto ERROR;

ret = Rtc8563Write(PCF8563_Address_Seconds,SetTime_Stu.RTC_Seconds);
if(ret == FALSE)
goto ERROR;

return TRUE;

ERROR:
return FALSE;
}

u8 PCF8563_GetDate(u8 PCF_Format, RTC_DateTypeDef* PCF_DataStruct)
{
/*
PCF_DataStruct->RTC_Years = Rtc8563Read(PCF8563_Address_Years);
PCF_DataStruct->RTC_Months= Rtc8563Read(PCF8563_Address_Months);
PCF_DataStruct->RTC_Days= Rtc8563Read(PCF8563_Address_Days);
PCF_DataStruct->RTC_WeekDays= Rtc8563Read(PCF8563_Address_WeekDays);
*/
PCF_DataStruct->RTC_Year= Rtc8563Read(PCF8563_Address_Years);
PCF_DataStruct->RTC_Month= Rtc8563Read(PCF8563_Address_Months);
PCF_DataStruct->RTC_Date= Rtc8563Read(PCF8563_Address_Days);
// PCF_DataStruct->RTC_WeekDay= Rtc8563Read(PCF8563_Address_WeekDays);

if(PCF_Format == PCF_Format_HEX)
{
// 转回16进制
PCF_DataStruct->RTC_Year = ((PCF_DataStruct->RTC_Year>>4)*10) + (PCF_DataStruct->RTC_Year&0x0F);
PCF_DataStruct->RTC_Month = ((PCF_DataStruct->RTC_Month>>4)*10) + (PCF_DataStruct->RTC_Month&0x0F);
PCF_DataStruct->RTC_Date = ((PCF_DataStruct->RTC_Date>>4)*10) + (PCF_DataStruct->RTC_Date&0x0F);
PCF_DataStruct->RTC_WeekDay = ((PCF_DataStruct->RTC_WeekDay>>4)*10) + (PCF_DataStruct->RTC_WeekDay&0x0F);
}

}

u8 PCF8563_GetTime(u8 PCF_Format, RTC_TimeTypeDef* PCF_TimeStruct)
{

PCF_TimeStruct->RTC_Hours = Rtc8563Read(PCF8563_Address_Hours);
PCF_TimeStruct->RTC_Minutes = Rtc8563Read(PCF8563_Address_Minutes);
PCF_TimeStruct->RTC_Seconds = Rtc8563Read(PCF8563_Address_Seconds);

UART6_SendByte(PCF_TimeStruct->RTC_Hours);
UART6_SendByte(PCF_TimeStruct->RTC_Minutes);
UART6_SendByte(PCF_TimeStruct->RTC_Seconds);

if(PCF_Format == PCF_Format_HEX)
{
// 转回16进制
PCF_TimeStruct->RTC_Hours = ((PCF_TimeStruct->RTC_Hours>>4)*10) + (PCF_TimeStruct->RTC_Hours&0x0F);
PCF_TimeStruct->RTC_Minutes = ((PCF_TimeStruct->RTC_Minutes>>4)*10) + (PCF_TimeStruct->RTC_Minutes&0x0F);
PCF_TimeStruct->RTC_Seconds = ((PCF_TimeStruct->RTC_Seconds>>4)*10) + (PCF_TimeStruct->RTC_Seconds&0x0F);
}

}