CS1237 STM32控制程序以及原理图需要注意事项

CS1237供电为5V的时候STM32是3.3V这时候应该加不小于5.1K的上拉电阻，不然CS1237跟32通信不上，32设置为OD驱动，同时不需要设计通信引脚的限流电阻就可以

下面是驱动程序

 

----------------------------------------------------------MAIN----------------------------------------------------------

/* USER CODE BEGIN Header */
/**
  ******************************************************************************
  * @file           : main.c
  * @brief          : Main program body
  ******************************************************************************
  * @attention
  *
  *

© Copyright (c) 2020 STMicroelectronics.
  * All rights reserved.

  *
  * This software component is licensed by ST under BSD 3-Clause license,
  * the "License"; You may not use this file except in compliance with the
  * License. You may obtain a copy of the License at:
  *                        opensource.org/licenses/BSD-3-Clause
  *
  ******************************************************************************
  */
/* USER CODE END Header */

/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "dma.h"
#include "usart.h"
#include "gpio.h"

/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include "string.h"
#include "mycs1237.h"
/* USER CODE END Includes */

/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */

/* USER CODE END PTD */

/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
/* USER CODE END PD */

/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */

/* USER CODE END PM */

/* Private variables ---------------------------------------------------------*/

/* USER CODE BEGIN PV */

/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
/* USER CODE BEGIN PFP */

/* USER CODE END PFP */

/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
uint8_t mystrlen(uint8_t *tmp)
{
    uint8_t i=0;
    while(1)
    {
        if(tmp[i]!='\0')
            i++;
        else
            return i;
    }
}
    
/* USER CODE END 0 */

/**
  * @brief  The application entry point.
  * @retval int
  */
int main(void)
{
  /* USER CODE BEGIN 1 */
    uint8_t buff[128]={0};
    uint8_t tmp=0;
    unsigned long mydata=0;
  /* USER CODE END 1 */

  /* MCU Configuration--------------------------------------------------------*/

  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
  HAL_Init();

  /* USER CODE BEGIN Init */

  /* USER CODE END Init */

  /* Configure the system clock */
  SystemClock_Config();

  /* USER CODE BEGIN SysInit */

  /* USER CODE END SysInit */

  /* Initialize all configured peripherals */
  MX_GPIO_Init();
  MX_DMA_Init();
  MX_USART1_UART_Init();
  /* USER CODE BEGIN 2 */
    init_cs1237();
    tmp=CS1237_REF(1)|CS1237_SPEED(1)|CS1237_PGA(0)|CS1237_CH(0);
    sprintf(buff,"SET CF is:0x%X\n",tmp);
    HAL_UART_Transmit(&huart1,buff,mystrlen(buff),100);
    memset(buff,0,128);
    rw_cs1237_cofig(0x65,tmp);
    
    tmp=rw_cs1237_cofig(0x56,0);
    sprintf(buff,"GET CF is:0x%X\n",tmp);
    HAL_UART_Transmit(&huart1,buff,mystrlen(buff),100);
    memset(buff,0,128);
  /* USER CODE END 2 */

  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {
    /* USER CODE END WHILE */

    /* USER CODE BEGIN 3 */
        mydata=read_cs1237_data();
        sprintf(buff,"read adc:0x%lX\n",mydata);
        HAL_UART_Transmit(&huart1,buff,mystrlen(buff),100);
        memset(buff,0,128);
        mydata=0;
  }
  /* USER CODE END 3 */
}

/**
  * @brief System Clock Configuration
  * @retval None
  */
void SystemClock_Config(void)
{
  RCC_OscInitTypeDef RCC_OscInitStruct = {0};
  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};

  /** Configure the main internal regulator output voltage 
  */
  __HAL_RCC_PWR_CLK_ENABLE();
  __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
  /** Initializes the CPU, AHB and APB busses clocks 
  */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
  RCC_OscInitStruct.HSEState = RCC_HSE_ON;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
  RCC_OscInitStruct.PLL.PLLM = 4;
  RCC_OscInitStruct.PLL.PLLN = 168;
  RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
  RCC_OscInitStruct.PLL.PLLQ = 4;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  {
    Error_Handler();
  }
  /** Initializes the CPU, AHB and APB busses clocks 
  */
  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
                              |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_5) != HAL_OK)
  {
    Error_Handler();
  }
}

/* USER CODE BEGIN 4 */

/* USER CODE END 4 */

/**
  * @brief  This function is executed in case of error occurrence.
  * @retval None
  */
void Error_Handler(void)
{
  /* USER CODE BEGIN Error_Handler_Debug */
  /* User can add his own implementation to report the HAL error return state */

  /* USER CODE END Error_Handler_Debug */
}

#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(uint8_t *file, uint32_t line)
{ 
  /* USER CODE BEGIN 6 */
  /* User can add his own implementation to report the file name and line number,
     tex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
  /* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
 

 

----------------------------------------------------------CS1237.C----------------------------------------------------------

 

#include "mycs1237.h"

static GPIO_InitTypeDef GPIO_InitStruct = {0};

#define CS1237_PINSCLK GPIO_PIN_14
#define CS1237_PINDD GPIO_PIN_13

#define CS1237_SCLK(x) HAL_GPIO_WritePin(GPIOB, CS1237_PINSCLK,x)
#define CS1237_DD(x) HAL_GPIO_WritePin(GPIOB, CS1237_PINDD,x)

#define READ_SCLK HAL_GPIO_ReadPin(GPIOB,CS1237_PINSCLK)
#define READ_DD HAL_GPIO_ReadPin(GPIOB,CS1237_PINDD)

#define CS1237_GPIO_OUT(x)  GPIO_InitStruct.Pull = GPIO_NOPULL;GPIO_InitStruct.Pin = x;GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_OD;GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;HAL_GPIO_Init(GPIOB, &GPIO_InitStruct)
#define CS1237_GPIO_IN(x)  GPIO_InitStruct.Pull = GPIO_NOPULL;GPIO_InitStruct.Pin = x;GPIO_InitStruct.Mode = GPIO_MODE_INPUT;GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;HAL_GPIO_Init(GPIOB, &GPIO_InitStruct)

//SCLK高100uS会关闭ADC！！！

static void cs1237_nop(void)
{
    unsigned int i=0;
    for(i=0;i<20;i++)
__asm {
    nop
}
}

void init_cs1237(void)
{
    
    CS1237_DD(GPIO_PIN_SET);
    CS1237_SCLK(GPIO_PIN_RESET);
    
  CS1237_GPIO_OUT(CS1237_PINDD);
    CS1237_GPIO_OUT(CS1237_PINSCLK);
    
    CS1237_SCLK(GPIO_PIN_SET);
    HAL_Delay(500);//ms
    CS1237_SCLK(GPIO_PIN_RESET);
    HAL_Delay(500);//ms
}

unsigned long read_cs1237_data(void)
{
    unsigned short i=0;
    unsigned long tmp=0;
    

    CS1237_GPIO_IN(CS1237_PINDD);//输入数据
    CS1237_GPIO_OUT(CS1237_PINSCLK);//输出脉冲
    
  while((GPIO_PIN_SET==READ_DD)&&(i<320))
    {
        i++;
        HAL_Delay(1);//ms
    }
    if(i<320)
    {}
    else
    {
        return 0;
    }
    for(i=0;i<24;i++)//1-24读取数据
    {    
        tmp<<=1;
        CS1237_SCLK(GPIO_PIN_SET);
        cs1237_nop();//460ns
        CS1237_SCLK(GPIO_PIN_RESET);
        cs1237_nop();//460ns        
        if(GPIO_PIN_SET==READ_DD)
            tmp++;
    }
    for(i=0;i<3;i++)//25-27拉高数据脚
    {
        CS1237_SCLK(GPIO_PIN_SET);
        cs1237_nop();//ns
        CS1237_SCLK(GPIO_PIN_RESET);
        cs1237_nop();//ns
    }
    CS1237_GPIO_IN(CS1237_PINDD);
    tmp^=0x800000;
    return tmp;
}

unsigned char rw_cs1237_cofig(unsigned char cmd,unsigned char data)
{
    unsigned char tmp=0;
    unsigned short i=0;
    unsigned char rw_flag=0;
    unsigned char cnoo = 0;
    
    if(0x65==cmd)
        rw_flag=1;
    else
        rw_flag=0;
    
    CS1237_GPIO_IN(CS1237_PINDD);
    
    while((READ_DD==1)&&(i<320))
    {
        i++;
        HAL_Delay(1);//ms
    }
    if(i<320)
    {}
    else
    {
        return 0;
    }
    for(i=1;i<25;i++)//1-24脉冲
    {
        CS1237_SCLK(GPIO_PIN_SET);
        cs1237_nop();//ns
        CS1237_SCLK(GPIO_PIN_RESET);
        cs1237_nop();//ns
    }
    for(i=25;i<27;i++)//25-26
    {
        cnoo<<=1;
        CS1237_SCLK(GPIO_PIN_SET);
        cs1237_nop();//ns        
        CS1237_SCLK(GPIO_PIN_RESET);
        cs1237_nop();//ns    
        if(1==READ_DD)
            cnoo++;
    }
    CS1237_SCLK(GPIO_PIN_SET);//27
    cs1237_nop();//ns
    CS1237_SCLK(GPIO_PIN_RESET);
    cs1237_nop();//ns
    CS1237_SCLK(GPIO_PIN_SET);//28
    cs1237_nop();//ns
    CS1237_SCLK(GPIO_PIN_RESET);
    cs1237_nop();//ns
    CS1237_SCLK(GPIO_PIN_SET);//29
    cs1237_nop();//ns
    CS1237_SCLK(GPIO_PIN_RESET);
    cs1237_nop();//ns    
  CS1237_GPIO_OUT(CS1237_PINDD);
    for(i=30;i<37;i++)//30-36
    {
        CS1237_SCLK(GPIO_PIN_SET);
        cs1237_nop();//ns
        if((cmd&0x40)==(0x40))
            CS1237_DD(1);
        else
            CS1237_DD(0);
        CS1237_SCLK(GPIO_PIN_RESET);
        cs1237_nop();//ns
        cmd<<=1;
    }
    CS1237_SCLK(GPIO_PIN_SET);//37
    cs1237_nop();//ns
    CS1237_SCLK(GPIO_PIN_RESET);
    cs1237_nop();//ns        
    if(rw_flag==1)
    {
        for(i=38;i<46;i++)//38-45
        {
            CS1237_SCLK(GPIO_PIN_SET);
            cs1237_nop();//ns
            if((data&0x80)==0x80)
                CS1237_DD(1);
            else
                CS1237_DD(0);
            CS1237_SCLK(GPIO_PIN_RESET);
            cs1237_nop();//ns    
            data<<=1;
        }
    }
    else
    {
        CS1237_GPIO_IN(CS1237_PINDD);
        for(i=38;i<46;i++)//38-45
        {
            tmp<<=1;
            CS1237_SCLK(GPIO_PIN_SET);
            cs1237_nop();//ns
            CS1237_SCLK(GPIO_PIN_RESET);
            cs1237_nop();//ns    
            if(READ_DD==1)
                tmp++;
        }
    }
    CS1237_SCLK(GPIO_PIN_SET);//46
    cs1237_nop();//ns
    CS1237_SCLK(GPIO_PIN_RESET);
    cs1237_nop();//ns    
    CS1237_GPIO_IN(CS1237_PINDD);
    return tmp;
}

 

 

----------------------------------------------------------CS1237.H----------------------------------------------------------

 

#ifndef __MYCS1237__
#define __MYCS1237__

#include "stm32f4xx_hal.h"

#define CS1237_REF(x) (x<<6)//1off
#define CS1237_SPEED(x) (x<<4)//0\10hz 1\40hz 2\640hz 3\1280hz
#define CS1237_PGA(x)  (x<<2)//0\1 1\2 2\64 3\128
#define CS1237_CH(x)  (x<<0)//0\A 1\ 2\wd 3\nd 

void init_cs1237(void);
unsigned long read_cs1237_data(void);
unsigned char rw_cs1237_cofig(unsigned char cmd,unsigned char data);

#endif