GD32使用CS1237通过ADC采集温度

GD32使用CS1237通过ADC采集温度

一.CS1237的配置文档

读和写的命令

注：需要注意PGA的放大倍数，不要超出了CS1237的输入的范围，要不然会输出最大值。

二.源码

CS1237.h文件

 
#ifndef __CS1237_H__
#define __CS1237_H__
  
#include "gd32f30x.h"
#include "delay.h"



#define CLK_TIME 50 // max 50us
//************************************************************************************************************
typedef enum
{
	C1237_PIN_0=GPIO_PIN_0,
	C1237_PIN_1=GPIO_PIN_1,
	C1237_PIN_2=GPIO_PIN_2,
	C1237_PIN_3=GPIO_PIN_3,
	C1237_PIN_11=GPIO_PIN_11,
	C1237_PIN_12=GPIO_PIN_12,
	C1237_PIN_14=GPIO_PIN_14,
	C1237_PIN_15=GPIO_PIN_15,
}C1237_GPIO;
//************************************************************************************************************
typedef enum
{
	C1237_RCUG=RCU_GPIOG,
	C1237_RCUE=RCU_GPIOE,
}C1237_GPIO_RCU;
//************************************************************************************************************
typedef enum
{
	C1237_PORTG=GPIOG,
	C1237_PORTE=GPIOE,
}C1237_GPIO_PORT;
//************************************************************************************************************
typedef enum
{
	C1237_10HZ = 0,
	C1237_40HZ = 1,
	C1237_640HZ = 2,
	C1237_1280HZ = 3
}C1237_SPEED;
//************************************************************************************************************
typedef enum
{
	C1237_PGA_1 = 0,
	C1237_PGA_2 = 1,
	C1237_PGA_64 = 2,
	C1237_PGA_128 = 3
}C1237_PGA;
//************************************************************************************************************
typedef enum
{
	C1237_CHA = 0, //adc channel
	C1237_RST = 1, //cheap reserved
	C1237_TEM = 2, //temperature test
	C1237_INS = 3 //internal short
}C1237_CHN;
/************************************************************************************************************
Function: C1237_OneClk();
Return value: void
Discription: C1237 input a clk pusle for to read or write
Example:
  C1237_OneClk();
*************************************************************************************************************/
void C1237_OneClk(C1237_GPIO_PORT CS1237_CLK_PORT,C1237_GPIO CS1237_CLK_PIN);
/************************************************************************************************************
Function: CS1237_ReadReg();
Return value: u8
Discription: read CS1237 register
Example:
  CS1237_ReadReg();
*************************************************************************************************************/
int16_t CS1237_ReadReg(C1237_GPIO CS1237_Data_PIN,C1237_GPIO CS1237_CLK_PIN,C1237_GPIO_PORT CS1237_Data_PORT,C1237_GPIO_PORT CS1237_CLK_PORT);
/************************************************************************************************************
Function: C1237_WriteReg(u8 mData);
Return value: void
Discription: wreite data to C1237 register
Example:
  C1237_WriteReg(mData);
*************************************************************************************************************/
void C1237_WriteReg(int16_t mData,C1237_GPIO CS1237_Data_PIN,C1237_GPIO CS1237_CLK_PIN,C1237_GPIO_PORT CS1237_Data_PORT,C1237_GPIO_PORT CS1237_CLK_PORT);
 
/************************************************************************************************************
Function: C1237_Init(BOOL refOutable,C1237_SPEED msel,C1237_PGA mselPga,C1237_CHN mselChn);
Return value: void
Discription: CS1237 init
Example:
  C1237_Init(0,C1237_10HZ,C1237_PGA_1,C1237_CHA);//ref voltage out disable,speed 10Hz,Pga 1, work at Adc mode
*************************************************************************************************************/
 void C1237_Init(unsigned char refOutable, C1237_SPEED msel, C1237_PGA mselPga, C1237_CHN mselChn,C1237_GPIO_RCU CS1237_Data_RCU,C1237_GPIO CS1237_Data_PIN,C1237_GPIO CS1237_CLK_PIN,C1237_GPIO_PORT CS1237_Data_PORT,C1237_GPIO_PORT CS1237_CLK_PORT);
/************************************************************************************************************
Function: C1237_ReadResult();
Return value: u32
Discription: read C1237 A/D result
Example:
  C1237_ReadResult();
*************************************************************************************************************/
int32_t C1237_ReadResult(C1237_GPIO CS1237_Data_PIN,C1237_GPIO CS1237_CLK_PIN,C1237_GPIO_PORT CS1237_Data_PORT,C1237_GPIO_PORT CS1237_CLK_PORT);

float resistance_to_temprature(float resistance);

extern int32_t ADC_REG_REG_SET;
 
#endif

CS1237.c文件

/*
* Copyright (c) 2006-2022, yang Team
*
* SPDX-License-Identifier: NONE
*
*Change Logs:
* Date           Author            Notes
* 2022-xx-xx     linchenuyang      first implementation
*/
 
#include "cs1237.h"


#define  CS1237_Data_PIN_STATE()   gpio_input_bit_get(CS1237_Data_PORT,CS1237_Data_PIN)

//*************************************************************************************************************
void CS1237_Data_IS_Out_HIGH(C1237_GPIO_PORT CS1237_Data_PORT,C1237_GPIO CS1237_Data_PIN)
{
    gpio_init(CS1237_Data_PORT, GPIO_MODE_OUT_PP, GPIO_OSPEED_50MHZ, CS1237_Data_PIN);	
    gpio_bit_write(CS1237_Data_PORT,CS1237_Data_PIN,SET);				
 
}
//*************************************************************************************************************
void CS1237_Data_IS_Out_LOW(C1237_GPIO_PORT CS1237_Data_PORT,C1237_GPIO CS1237_Data_PIN)
{
    gpio_init(CS1237_Data_PORT, GPIO_MODE_OUT_PP, GPIO_OSPEED_50MHZ, CS1237_Data_PIN);	
    gpio_bit_write(CS1237_Data_PORT,CS1237_Data_PIN,RESET);		
 
}
//*************************************************************************************************************
void CS1237_Data_IS_INPUT(C1237_GPIO_PORT CS1237_Data_PORT,C1237_GPIO CS1237_Data_PIN)
{
	gpio_init(CS1237_Data_PORT, GPIO_MODE_IPU, GPIO_OSPEED_50MHZ, CS1237_Data_PIN);	
    gpio_bit_write(CS1237_Data_PORT,CS1237_Data_PIN,SET);
 
}
//*************************************************************************************************************
void CS1237_Data_IS_INPUT_LOW(C1237_GPIO_PORT CS1237_Data_PORT,C1237_GPIO CS1237_Data_PIN)
{
    gpio_init(CS1237_Data_PORT, GPIO_MODE_IPU, GPIO_OSPEED_50MHZ, CS1237_Data_PIN);	
    gpio_bit_write(CS1237_Data_PORT,CS1237_Data_PIN,RESET);
 
}
//*************************************************************************************************************
void CS1237_SCLK_HIHG(C1237_GPIO_PORT CS1237_CLK_PORT,C1237_GPIO CS1237_CLK_PIN)
{	
	gpio_init(CS1237_CLK_PORT, GPIO_MODE_OUT_PP, GPIO_OSPEED_50MHZ, CS1237_CLK_PIN);	
    gpio_bit_write(CS1237_CLK_PORT,CS1237_CLK_PIN,SET);
 
}
//*************************************************************************************************************
void CS1237_SCLK_LOW(C1237_GPIO_PORT CS1237_CLK_PORT,C1237_GPIO CS1237_CLK_PIN)
{
    gpio_init(CS1237_CLK_PORT, GPIO_MODE_OUT_PP, GPIO_OSPEED_50MHZ, CS1237_CLK_PIN);	
    gpio_bit_write(CS1237_CLK_PORT,CS1237_CLK_PIN,RESET);
}
//*************************************************************************************************************
void C1237_OneClk(C1237_GPIO_PORT CS1237_CLK_PORT,C1237_GPIO CS1237_CLK_PIN)
{
    CS1237_SCLK_HIHG(CS1237_CLK_PORT,CS1237_CLK_PIN);
	  delay(CLK_TIME);
    CS1237_SCLK_LOW(CS1237_CLK_PORT,CS1237_CLK_PIN);
    delay(CLK_TIME);
}
//*************************************************************************************************************
int16_t CS1237_ReadReg(C1237_GPIO CS1237_Data_PIN,C1237_GPIO CS1237_CLK_PIN,C1237_GPIO_PORT CS1237_Data_PORT,C1237_GPIO_PORT CS1237_CLK_PORT)
{
    int16_t i = 0;
    int16_t tem = 0;
    CS1237_SCLK_LOW(CS1237_CLK_PORT,CS1237_CLK_PIN);
		delay(50);//Wakeup MCU
    CS1237_Data_IS_INPUT(CS1237_Data_PORT,CS1237_Data_PIN); //输入模式
    while (CS1237_Data_PIN_STATE())//需要实际工程使用需要加入超时
		{
        i++;
        delay_1ms(1);//ms
		}
    for (i = 0; i < 27; i++) // 1-26th CLK
        C1237_OneClk(CS1237_CLK_PORT, CS1237_CLK_PIN);
 
    CS1237_Data_IS_Out_HIGH(CS1237_Data_PORT,CS1237_Data_PIN); //Force High  cs1237 direction input
    C1237_OneClk(CS1237_CLK_PORT, CS1237_CLK_PIN); // 28th CLK
    C1237_OneClk(CS1237_CLK_PORT, CS1237_CLK_PIN); // 29th CLK
    //
    tem = 0xAC; // PIN out 	//读命令(0x56)左移1位	
    for (i = 0; i < 7; i++) // 30~36th CLK
    {
 
        if (tem & 0x80)
        CS1237_Data_IS_Out_HIGH(CS1237_Data_PORT,CS1237_Data_PIN);
        else
        CS1237_Data_IS_Out_LOW(CS1237_Data_PORT,CS1237_Data_PIN);
				tem <<= 1;
        C1237_OneClk(CS1237_CLK_PORT, CS1237_CLK_PIN);
   
    }
    CS1237_Data_IS_INPUT( CS1237_Data_PORT,CS1237_Data_PIN); // cs1237 change to output direction
    C1237_OneClk(CS1237_CLK_PORT, CS1237_CLK_PIN); // 37th CLK
 
    for (i = 0; i < 8; i++) // 37~45th CLK
    {
        tem <<= 1;
        C1237_OneClk(CS1237_CLK_PORT, CS1237_CLK_PIN);
        if (CS1237_Data_PIN_STATE())
            tem++;
    }
    C1237_OneClk(CS1237_CLK_PORT, CS1237_CLK_PIN);
    ; // 46th CLK
    return tem;
}
// End of CS1237_ReadReg()
//*************************************************************************************************************
void C1237_WriteReg(int16_t mData,C1237_GPIO CS1237_Data_PIN,C1237_GPIO CS1237_CLK_PIN,C1237_GPIO_PORT CS1237_Data_PORT,C1237_GPIO_PORT CS1237_CLK_PORT)
{
    int16_t i = 0;
    int16_t tem = 0;
    CS1237_SCLK_LOW(CS1237_CLK_PORT,CS1237_CLK_PIN);
		delay(50);//Wakeup MCU
    CS1237_Data_IS_INPUT( CS1237_Data_PORT,CS1237_Data_PIN);
    while (CS1237_Data_PIN_STATE())//需要实际工程使用需要加入超时
		{  
     		i++;
        delay_1ms(1);//ms
		}
    for (i = 0; i < 27; i++) // 1~26th CLK
        C1237_OneClk(CS1237_CLK_PORT, CS1237_CLK_PIN);
   
    //C1237_OneClk(CS1237_CLK_PORT, CS1237_CLK_PIN);//27th CLK
		CS1237_Data_IS_Out_HIGH(CS1237_Data_PORT,CS1237_Data_PIN); // force high
    C1237_OneClk(CS1237_CLK_PORT, CS1237_CLK_PIN); // 28th CLK
    C1237_OneClk(CS1237_CLK_PORT, CS1237_CLK_PIN); // 29th CLK
    tem = 0xCA;//写命令(0x65)左移1位	
    for (i = 0; i < 7; i++) // 30~36th CLK
    {
 
        if (tem & 0x80)
        CS1237_Data_IS_Out_HIGH(CS1237_Data_PORT,CS1237_Data_PIN);
        else
        CS1237_Data_IS_Out_LOW(CS1237_Data_PORT,CS1237_Data_PIN);
				tem <<= 1;
        C1237_OneClk(CS1237_CLK_PORT, CS1237_CLK_PIN);
       
    }
    CS1237_Data_IS_Out_HIGH(CS1237_Data_PORT,CS1237_Data_PIN);        // direction chage to intput direction
    C1237_OneClk(CS1237_CLK_PORT, CS1237_CLK_PIN);          // 37th CLK
    for (i = 0; i < 8; i++) // 38~45th CLK
    {
 
        if (mData & 0x80)
            CS1237_Data_IS_Out_HIGH(CS1237_Data_PORT,CS1237_Data_PIN);
        else
           CS1237_Data_IS_Out_LOW(CS1237_Data_PORT,CS1237_Data_PIN);
        mData <<= 1;
        C1237_OneClk(CS1237_CLK_PORT, CS1237_CLK_PIN);
    }
		CS1237_Data_IS_INPUT( CS1237_Data_PORT,CS1237_Data_PIN);
    C1237_OneClk(CS1237_CLK_PORT, CS1237_CLK_PIN); // 46th CLK
		
}
// End of C1237_WriteReg(u8 mData)
//*************************************************************************************************************
int32_t ADC_REG_REG_SET;
void C1237_Init(unsigned char refOutable, C1237_SPEED msel, C1237_PGA mselPga, C1237_CHN mselChn,C1237_GPIO_RCU CS1237_Data_RCU,C1237_GPIO CS1237_Data_PIN,C1237_GPIO CS1237_CLK_PIN,C1237_GPIO_PORT CS1237_Data_PORT,C1237_GPIO_PORT CS1237_CLK_PORT)
{
  volatile int16_t tem = 0;
 
  tem= ((refOutable&0x1)<<6)|((msel&0x03)<<4)|((mselPga&0x03)<<2)|((mselChn&0x03)<<0);
	
	rcu_periph_clock_enable(CS1237_Data_RCU);//PG时钟使能
	
	ADC_REG_REG_SET = tem;
   C1237_WriteReg(tem,CS1237_Data_PIN, CS1237_CLK_PIN,CS1237_Data_PORT,CS1237_CLK_PORT);
}
// End of C1237_Init(BOOL refOutable,C1237_SPEED msel,C1237_PGA mselPga,C1237_CHN mselChn)
//*************************************************************************************************************
int32_t C1237_ReadResult(C1237_GPIO CS1237_Data_PIN,C1237_GPIO CS1237_CLK_PIN,C1237_GPIO_PORT CS1237_Data_PORT,C1237_GPIO_PORT CS1237_CLK_PORT)
{
    int16_t i;
    int32_t rdata = 0;
    CS1237_SCLK_LOW(CS1237_CLK_PORT,CS1237_CLK_PIN);
		delay(50);//Wakeup MCU
    CS1237_Data_IS_INPUT( CS1237_Data_PORT,CS1237_Data_PIN);
    while (CS1237_Data_PIN_STATE())//需要实际工程使用中断替换
		{
		   i++;
       delay_1ms(1);//ms
		}
    for (i = 0; i < 24; i++)
    {
        rdata <<= 1;
        C1237_OneClk(CS1237_CLK_PORT, CS1237_CLK_PIN);
        if (CS1237_Data_PIN_STATE()) // read data
            rdata++;
    }
    C1237_OneClk(CS1237_CLK_PORT, CS1237_CLK_PIN);
    C1237_OneClk(CS1237_CLK_PORT, CS1237_CLK_PIN);
    C1237_OneClk(CS1237_CLK_PORT, CS1237_CLK_PIN);
    return rdata;
}
// End of C1237_ReadResult()

ADC值转温度文件（使用的PT1000）

#define LOW_LIMIT_TEMP 	(-1)            //最低温度8度
#define MAX_LIMIT_TEMP  (1)          //最高温度150度

// PT1000分度表   8~ 150度
const float PT1000_Table[143]=
{
    1031.23, 1035.13,	//8 ~ 9
    1039.03, 1042.92, 1046.82, 1050.71, 1054.60, 1058.49, 1062.38, 1066.27, 1070.16, 1074.05,	//10 ~ 19
    1077.94, 1081.82, 1085.70, 1089.59, 1093.47, 1097.35, 1101.23, 1105.10, 1108.98, 1112.86,	//20 ~ 29
    1116.73, 1120.60, 1124.47, 1128.35, 1132.21, 1136.08, 1139.95, 1143.82, 1147.68, 1151.55, 	//30 ~ 39
    1155.41, 1159.27, 1163.13, 1166.99, 1170.85, 1174.70, 1178.56, 1182.41, 1186.27, 1190.12,	//40 ~ 49
    1193.97, 1197.82, 1201.67, 1205.52, 1209.36, 1213.21, 1217.05, 1220.90, 1224.74, 1228.58,	//50 ~ 59
    1232.42, 1236.26, 1240.09, 1243.93, 1247.77, 1251.60, 1255.43, 1259.26, 1263.09, 1266.92,	//60 ~ 69
    1270.75, 1274.58, 1278.40, 1282.23, 1286.05, 1289.87, 1293.70, 1297.52, 1301.33, 1305.15,	//70 ~ 79
    1308.97, 1312.78, 1316.60, 1320.41, 1324.22, 1328.03, 1331.84, 1335.65, 1339.46, 1343.26,	//80 ~ 89
    1347.07, 1350.87, 1354.68, 1358.48, 1362.28, 1366.08, 1369.87, 1373.67, 1377.47, 1381.26,	//90 ~ 99
    1385.06, 1388.85, 1392.64, 1396.43, 1400.22, 1404.00, 1407.79, 1411.58, 1415.36, 1419.14, 	//100 ~ 109
    1422.93, 1426.71, 1430.49, 1434.26, 1438.04, 1441.82, 1445.59, 1449.37, 1453.14, 1456.91,	//110 ~ 119
    1460.68, 1464.45, 1468.22, 1471.99, 1475.75, 1479.52, 1483.28, 1487.04, 1490.81, 1494.56, //120 ~ 129
	  1498.32, 1502.08, 1505.84, 1509.59, 1513.35, 1517.10, 1520.85, 1524.60, 1528.39, 1532.14,  //130 ~ 139
	  1535.85, 1539.59, 1543.34, 1547.08, 1550.82, 1554.57, 1558.31, 1562.05, 1565.78, 1569.52, //140 ~ 149
	  1573.26   //150
};

/******************************************************************************
 函数名   : resistance_to_temprature(float resistance)
 功能     : 计算PT1000阻值对应的温度
 输入参数 : 阻值
 返回值   : 温度值
******************************************************************************
*/
float resistance_to_temprature(float resistance)
{
    int i=0;
    float 	 temprature;

    if (resistance < PT1000_Table[0]) //超出范围
    {
        return LOW_LIMIT_TEMP;
    }

    if (resistance > PT1000_Table[142])//超出范围
    {
        return MAX_LIMIT_TEMP;
    }
    
		while(i<143)
		{
		    if (resistance < PT1000_Table[i])
        {
          break;
        }
				i++;
		}

    temprature = 8+i;

    return temprature;
}

主函数调用方法

float ADC_REG_REG;
float ADC_TEMPERATURE;
C1237_Init(0,C1237_40HZ,C1237_PGA_1,C1237_CHA,C1237_RCUG,C1237_PIN_2,C1237_PIN_3,C1237_PORTG,C1237_PORTG);																				// 0Cs1237初始化 
delay_1ms(50); 
ADC_REG_REG=C1237_ReadResult(C1237_PIN_2,C1237_PIN_3,C1237_PORTG,C1237_PORTG)/4068060.199*1000;
delay_1ms(50);
ADC_TEMPERATURE=resistance_to_temprature(ADC_REG_REG);

三.引用

1.在C1237_Init初始化函数中设置好CS1237的工作模式和设置DO和SCLK接脚；
2.调用C1237_ReadResult函数，设置DO和SCLK接脚；文章来源地址https://www.toymoban.com/news/detail-770677.html

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