STM32F030C8读取CS1237采集模拟

Chapter1 【问题解决记录】STM32F030C8读取CS1237采集模拟
- 问题描述
- 原因分析：
- 解决方案：
Chapter2 CS1237 STM32控制程序以及原理图需要注意事项

Chapter1 【问题解决记录】STM32F030C8读取CS1237采集模拟

原文链接：https://blog.csdn.net/weixin_40058986/article/details/133160155

问题描述

使用STM32F030C8读取CS1237采集模拟电压时，遇到CS1237的CONFIG寄存器无法读写正常的困扰；就是配置 RefOut_OFF | SpeedSelct_1280HZ | PGA_1 | CH_A 这些参数无法正确写入，实际是我要写入0x70，但是读出来是随机值；而修改代码，上电MCU直接读取CONFIG，得到数值是0x0C（和手册默认值是对应的，说明读操作正常）。
而直接读取CS1237的ADC转换数值是和外界输入电压是一致的，只是设置CONFG寄存器读写不一致。

原因分析：

第一个想到的原因是，CS1237的操作时序问题，有几个注意点是：
（1）设置STM32的DOUT端口为INPUT，监测来自CS1237的DOUT电平，一般芯片上电后，CS1237的DOUT会不断地输出高脉冲（示波器测量约20us的高脉冲），代码中要监测到DOUT的”下降沿“，然后才是读写配置和读取ADC转换数值的操作；
（2）参考了网络好多示例代码，尤其是”技小新“的CS1237模块，LCSC立创商城可以搜到有；我的代码基本和他的demo一样；
（3）CS1237上电后需要延时300毫秒的启动时间？这个实际测试后发现，这个时间不是必须；
在这里插入图片描述
一顿仔细检查代码，发现了STM32端口配置的”笔误“，修改后，仍然无法正确配置CONFIG；
第二个想到的原因是，硬件CS1237和STM32的电平兼容问题，我的电路CS1237是5V供电，stm32是3V3供电，它们之间SPI通过22欧姆电阻串联。修改硬件电路，将CS1237的电源电压改为3V3后，虽然仍无法正确配置CONFIG，但是采集电压变得稳定许多；
修改串联电阻为100欧姆，600欧姆，6k5欧姆，几乎没有改善；
第三个原因是，设置CS1237的转换速率是不是对于STM32F0这个MCU来说有点太快了？于是我配置了SpeedSelct_1280HZ 是配置不正常，而设置其他SpeedSelct_640HZ及以下频率，发现CONFIG寄存器正常读写，没错！是可以正常读写，而PGA的放大倍数也可以正常设置了。

下面是关键部分的代码：

#include "gp8211s.h"
#include "main.h"
#include "delay.h"uint8_t Gp8211s_Channel_Sel;void Gp8211s_Choose_Channel(uint8_t ch)
{if( !ch ) Gp8211s_Channel_Sel = 0;elseGp8211s_Channel_Sel = 1;
}void Gp8211s_SCL_Clr()
{if( !Gp8211s_Channel_Sel )HAL_GPIO_WritePin(GP1_SCLK_GPIO_Port, GP1_SCLK_Pin, GPIO_PIN_RESET);else	HAL_GPIO_WritePin(GP2_SCLK_GPIO_Port, GP2_SCLK_Pin, GPIO_PIN_RESET);
}
void Gp8211s_SCL_Set()
{if( !Gp8211s_Channel_Sel )HAL_GPIO_WritePin(GP1_SCLK_GPIO_Port, GP1_SCLK_Pin, GPIO_PIN_SET);else	HAL_GPIO_WritePin(GP2_SCLK_GPIO_Port, GP2_SCLK_Pin, GPIO_PIN_SET);
}
void Gp8211s_SDA_Clr()
{if( !Gp8211s_Channel_Sel )HAL_GPIO_WritePin(GP1_SDA_GPIO_Port, GP1_SDA_Pin, GPIO_PIN_RESET);else	HAL_GPIO_WritePin(GP2_SDA_GPIO_Port, GP2_SDA_Pin, GPIO_PIN_RESET);
}
void Gp8211s_SDA_Set()
{if( !Gp8211s_Channel_Sel )HAL_GPIO_WritePin(GP1_SDA_GPIO_Port, GP1_SDA_Pin, GPIO_PIN_SET);else	HAL_GPIO_WritePin(GP2_SDA_GPIO_Port, GP2_SDA_Pin, GPIO_PIN_SET);
}void Gp8211s_IIC_SdaOut()
{GPIO_InitTypeDef GPIO_InitStruct;if( !Gp8211s_Channel_Sel ){GPIO_InitStruct.Pin = GP1_SDA_Pin;GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP; GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;GPIO_InitStruct.Pull = GPIO_PULLUP;HAL_GPIO_Init( GP1_SDA_GPIO_Port, &GPIO_InitStruct );}else{GPIO_InitStruct.Pin = GP2_SDA_Pin;GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP; GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;GPIO_InitStruct.Pull = GPIO_PULLUP;HAL_GPIO_Init( GP2_SDA_GPIO_Port, &GPIO_InitStruct );}
}void Gp8211s_IIC_SdaIn()
{GPIO_InitTypeDef GPIO_InitStruct;//return;if( !Gp8211s_Channel_Sel ){GPIO_InitStruct.Pin = GP1_SDA_Pin;GPIO_InitStruct.Mode = GPIO_MODE_INPUT; GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;GPIO_InitStruct.Pull = GPIO_PULLUP;HAL_GPIO_Init( GP1_SDA_GPIO_Port, &GPIO_InitStruct );}else{GPIO_InitStruct.Pin = GP2_SDA_Pin;GPIO_InitStruct.Mode = GPIO_MODE_INPUT; GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;GPIO_InitStruct.Pull = GPIO_PULLUP;HAL_GPIO_Init( GP2_SDA_GPIO_Port, &GPIO_InitStruct );}
}void Gp8211s_IIC_Init()
{Gp8211s_IIC_SdaOut();Gp8211s_SDA_Set();Gp8211s_SCL_Set();delay_us(10);
}void Gp8211s_IIC_Start(void)
{Gp8211s_IIC_SdaOut();Gp8211s_SDA_Set();Gp8211s_SCL_Set();delay_us(10);Gp8211s_SDA_Clr();delay_us(10);
}void Gp8211s_IIC_Stop(void)
{Gp8211s_IIC_SdaOut();Gp8211s_SDA_Clr();Gp8211s_SCL_Set();delay_us(10);Gp8211s_SDA_Set();delay_us(10);
}void Gp8211s_IIC_SendByte(uint8_t txd)
{uint8_t t;  uint8_t tdata = txd;	Gp8211s_IIC_SdaOut();Gp8211s_SCL_Clr();delay_us(10);for(t=0; t<8; t++){              if( tdata & 0x80 )Gp8211s_SDA_Set();elseGp8211s_SDA_Clr();tdata <<= 1; 	  delay_us(10);Gp8211s_SCL_Set();delay_us(10);Gp8211s_SCL_Clr();delay_us(10);}	 
}uint8_t Gp8211s_IIC_SdaState()
{uint8_t ret;if( !Gp8211s_Channel_Sel )ret = HAL_GPIO_ReadPin(GP1_SDA_GPIO_Port, GP1_SDA_Pin);elseret = HAL_GPIO_ReadPin(GP2_SDA_GPIO_Port, GP2_SDA_Pin);return ret;
}uint8_t Gp8211s_IIC_ReadByte(void)
{uint8_t t;  uint8_t rdata=0;	Gp8211s_IIC_SdaIn();for(t=0; t<8; t++){      Gp8211s_SCL_Set();delay_us(10);rdata <<= 1; if( Gp8211s_IIC_SdaState() )rdata|=0x01;Gp8211s_SCL_Clr();delay_us(10);}	 return rdata;
}uint8_t Gp8211s_IIC_WaitAck(void)
{uint32_t ucErrTime = 0;GPIO_PinState sda_state;uint8_t RetValue = 0;Gp8211s_SCL_Set();delay_us(20);#if 0	Gp8211s_IIC_SdaIn();while(ucErrTime++ < 10000){delay_us(20);sda_state = Gp8211s_IIC_SdaState();if( sda_state == GPIO_PIN_RESET ){RetValue = 1;break;}}if( ucErrTime >= 10000 ){printf("Gp8211s_IIC_WaitAck timeout\n");Gp8211s_IIC_Stop();}#endifreturn RetValue;
}void Gp8211s_Init(void)
{	//Range 0 to 5VGp8211s_IIC_Start();Gp8211s_IIC_SendByte(0xB0);Gp8211s_IIC_WaitAck();Gp8211s_IIC_SendByte(0x01);Gp8211s_IIC_WaitAck();Gp8211s_IIC_SendByte(0x55);   //0x44, 5V; 0x55: 10V; 0x77:12V;Gp8211s_IIC_WaitAck();Gp8211s_IIC_Stop(); 
}// data_hex max: 0x7FFF
void gp8211s_send_cmd(uint16_t data_hex )
{	uint8_t data8_tmp = 0;//Set Reg valueGp8211s_IIC_Start();Gp8211s_IIC_SendByte(0xB0);Gp8211s_IIC_WaitAck();Gp8211s_IIC_SendByte(0x02);Gp8211s_IIC_WaitAck();data8_tmp = data_hex & 0xFF;Gp8211s_IIC_SendByte(data8_tmp);//DATA Low//Gp8211s_IIC_WaitAck();   //!!! add this, not OK;data8_tmp = (data_hex & 0x7F00 )>> 8;Gp8211s_IIC_SendByte(data8_tmp);//DATA HighGp8211s_IIC_WaitAck();Gp8211s_IIC_Stop(); 
}void gp8211s_OutPutVolt(uint16_t volt_in_mv )
{	uint32_t VoltRange = 10*1000; //10Vuint16_t  RegVal = 0;if( volt_in_mv > VoltRange )volt_in_mv = VoltRange;RegVal = volt_in_mv * 0x7FFF / VoltRange;RegVal &= 0x7FFF;//printf("volt_in_mv: %d, RegVal: %X  \n ", volt_in_mv, RegVal);gp8211s_send_cmd(RegVal);
//		gp8211s_send_cmd(0x4000);//printf("volt_in_mv: %d, RegVal: %X  \n ", volt_in_mv, RegVal);
}

main部分

configData = RefOut_OFF | SpeedSelct_640HZ | PGA_1 | CH_A;Con_CS1237(configData);if( Read_CON() != configData )printf("config in1 error! set: %X, get:%X \r\n ", configData,  Read_CON());printf("> config ch1 ok! \n");

解决方案：

实物照片：外部输入1.50V，OLED的IN1显示1.472V；基本正确；
在这里插入图片描述
例如：新建一个 Message 对象，并将读取到的数据存入 Message，然后 mHandler.obtainMessage(READ_DATA, bytes, -1, buffer).sendToTarget();换成 mHandler.sendMessage()。

Chapter2 CS1237 STM32控制程序以及原理图需要注意事项

原文链接：https://blog.csdn.net/qq_34991787/article/details/111083226

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>&copy; 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++;elsereturn 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);//msCS1237_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();//460nsCS1237_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();//nsCS1237_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;elserw_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();//nsCS1237_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);//27cs1237_nop();//nsCS1237_SCLK(GPIO_PIN_RESET);cs1237_nop();//nsCS1237_SCLK(GPIO_PIN_SET);//28cs1237_nop();//nsCS1237_SCLK(GPIO_PIN_RESET);cs1237_nop();//nsCS1237_SCLK(GPIO_PIN_SET);//29cs1237_nop();//nsCS1237_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();//nsif((cmd&0x40)==(0x40))CS1237_DD(1);elseCS1237_DD(0);CS1237_SCLK(GPIO_PIN_RESET);cs1237_nop();//nscmd<<=1;}CS1237_SCLK(GPIO_PIN_SET);//37cs1237_nop();//nsCS1237_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();//nsif((data&0x80)==0x80)CS1237_DD(1);elseCS1237_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();//nsCS1237_SCLK(GPIO_PIN_RESET);cs1237_nop();//ns    if(READ_DD==1)tmp++;}}CS1237_SCLK(GPIO_PIN_SET);//46cs1237_nop();//nsCS1237_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