MAX31855K 源代码

只看该作者 · 2020-5-5 12:21

* @file Max31855.c
* @brief Max31855��ģ��
* @version    1.0
* @date 2014�� 5�� 9 ��
* @author ��ƽ
**
**--------------��ǰ�汾�޶�------------------------------------------------------------------------------
** �޸��:
** �ա��:
** �衡��:
**
**------------------------------------------------------------------------------------------------------
**************************************************************************************************************/
/** @addtogroup Max31855
* @{
*/
#include "../include/Max31855.h"
Max31855_DATA ChipOut;
/*********************************************************************//**
* @fun readdata
* @brief ��ȡMAX31855��ѹֵ
* @param None
* @return  ��
***********************************************************************/
static uint8_t readdata(uint32_t *pData)
{
uint8_t i;
uint32_t tmp;
static uint16_t timesticke = 0;

if(timesticke < 2000)
{
      timesticke++;
      return 0;
}
else
{
      tmp = 0;
      MAX31855_CLK = LVAR;
      MAX31855_CS = LVAR;
      for(i = 0; i < 32; i++)
      {
         asm("nop;");
         MAX31855_CLK = HVAR;
         tmp = tmp<<1;
         if(MAX31855_DATA == HVAR)
            tmp |= 1;
         else
            tmp &= ~1;
         MAX31855_CLK = LVAR;
         asm("nop;");
         asm("nop;");
         asm("nop;");
      }
      MAX31855_CLK = LVAR;
      MAX31855_CS = HVAR;
      *pData = tmp;
      timesticke = 0;
      return 1;
}
}
/*********************************************************************//**
* @fun Max31855_GetTemperatureValue
* @brief ��ȡ�ȵ�ż�¶�ֵ
* @param None
* @return  �ȵ�ż�¶�ֵ
***********************************************************************/
int32_t Max31855_GetTemperatureValue(void)
{
int32_t retHTe;
uint32_t temp;

if(readdata(&temp))
{
      ChipOut.all = temp;
}
retHTe = ChipOut.bit.HTemperature;
return retHTe;
}
/*********************************************************************//**
* @fun GetMax31855Fault
* @brief ��ȡ�ȵ�ż��
* @param None
* @return  0:�޹�� 1:��· 2: �ڵض�· 3:��VCC��·
***********************************************************************/
uint8_t GetMax31855Fault(void)
{
if(ChipOut.bit.Fault**)
{
      if(ChipOut.bit.OC)
         return 1;
      if(ChipOut.bit.SCG)
         return 2;
      if(ChipOut.bit.SCV)
         return 3;
}
return 0;
}

/**
* @}
*/

MAX31855K 源代码

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