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
*
* <h2><center>© Copyright (c) 2020 STMicroelectronics.
* All rights reserved.</center></h2>
*
* 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
",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
",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
",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
", 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)//010hz 140hz 2640hz 31280hz
#define CS1237_PGA(x) (x<<2)//01 12 264 3128
#define CS1237_CH(x) (x<<0)//0A 1 2wd 3
d
void init_cs1237(void);
unsigned long read_cs1237_data(void);
unsigned char rw_cs1237_cofig(unsigned char cmd,unsigned char data);
#endif
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