本文主要是介绍SGM41511电源管理芯片与STM32L496通讯源码虚拟I2C协议实测成功读写cubemx设置裸机和freertos操作系统源码通用，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
不用它的I2C设置，容易出错不通讯，只打开GPIO输出就可以；
如果是RTOS的话请打开系统定时器提供参考时间基准，那个定时器都行；
以下是经过验证的代码，同样适用于SGM同类系列电源管理芯片；
准备好jlink进行RTT打印观测：
SGM41511.c
/******************************************************************************* Description : SGM41511 电源管理芯片驱动* Author :* Date : 2021.01.22******************************************************************************/
#include "SGM41511.h"
#include "SEGGER_RTT.h"/******************************************************************************** Function Name : delay_us* Description : us延时* Input : None* Output : None* Return : None******************************************************************************/
void delay_us(unsigned short time)
{unsigned short i = 0;while(time--){i = 100;while(i--);}
}/******************************************************************************** Function Name : SGM41511_IIC_Init* Description : IIC初始化* Input : None* Output : None* Return : None******************************************************************************/
void SGM41511_IIC_Init(void)
{GPIO_InitTypeDef GPIO_InitStruct = {0};/* 使能GPIOB时钟 */__HAL_RCC_GPIOB_CLK_ENABLE();__HAL_RCC_GPIOE_CLK_ENABLE();/* 配置SCL和SDA引脚 */GPIO_InitStruct.Pin = SCL_PIN | SDA_PIN;GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_OD;GPIO_InitStruct.Pull = GPIO_NOPULL;GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);/* 配置BAT_NCS引脚 */GPIO_InitStruct.Pin = BAT_NCS_PIN|BAT_Psel_PIN;GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_OD;GPIO_InitStruct.Pull = GPIO_NOPULL;GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;HAL_GPIO_Init(GPIOE, &GPIO_InitStruct);/* 初始化SCL和SDA为低电平 */SCL_H();SDA_H();BAT_NCS_L();
// BAT_Psel_L();SEGGER_RTT_printf(0,"SGM41511_IIC_Init!\n");
}/******************************************************************************** Function Name : IIC_Sda_Mod* Description : SDA输入输出选择* Input : mod - SDA输入输出选择* Output : None* Return : None******************************************************************************/
void IIC_Sda_Mod(unsigned char mod)
{GPIO_InitTypeDef GPIO_InitStruct = {0};/* 配置SCL引脚 */GPIO_InitStruct.Pin = SCL_PIN;GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_OD;GPIO_InitStruct.Pull = GPIO_NOPULL;GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);if(mod != 0) // mod = 1, SDA输出模式{GPIO_InitStruct.Pin = SDA_PIN;GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_OD;}else // mod = 0, SDA输入模式{GPIO_InitStruct.Pin = SDA_PIN;GPIO_InitStruct.Mode = GPIO_MODE_INPUT;}GPIO_InitStruct.Pull = GPIO_NOPULL;GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
}/******************************************************************************** Function Name : IIC_Start* Description : 产生IIC起始信号* Input : None* Output : None* Return : None******************************************************************************/
void IIC_Start(void)
{IIC_Sda_Mod(1); // SDA设置为输出SCL_H();SDA_H();delay_us(4);SDA_L();delay_us(4);SCL_L();}/******************************************************************************** Function Name : IIC_Stop* Description : 产生IIC停止信号* Input : None* Output : None* Return : None******************************************************************************/
void IIC_Stop(void)
{IIC_Sda_Mod(1); // SDA设置为输出SCL_L();SDA_L();delay_us(4);SCL_H();SDA_H();delay_us(4);
}/******************************************************************************** Function Name : IIC_Wait_Ack* Description : 等待应答信号到来* Input : None* Output : None* Return : 0 - 接收应答成功, 1 - 接收应答失败******************************************************************************/
unsigned char IIC_Wait_Ack(void)
{unsigned char ucErrTime = 0;IIC_Sda_Mod(0); // SDA设置为输入SDA_H();delay_us(1);SCL_H();delay_us(1);while(HAL_GPIO_ReadPin(IIC_PORT, SDA_PIN)){ucErrTime++;if(ucErrTime > 250){IIC_Stop();return 1;}}SCL_L();return 0;
}/******************************************************************************** Function Name : IIC_Ack* Description : 产生IIC应答信号* Input : None* Output : None* Return : None******************************************************************************/
void IIC_Ack(void)
{SCL_L();IIC_Sda_Mod(1); // SDA设置为输出SDA_L();delay_us(2);SCL_H();delay_us(2);SCL_L();
}/******************************************************************************** Function Name : IIC_NAck* Description : 产生IIC非应答信号* Input : None* Output : None* Return : None******************************************************************************/
void IIC_NAck(void)
{SCL_L();IIC_Sda_Mod(1); // SDA设置为输出SDA_H();delay_us(2);SCL_H();delay_us(2);SCL_L();
}/******************************************************************************** Function Name : IIC_Send_Byte* Description : IIC发送一个字节* Input : txd - 要发送的字节* Output : None* Return : None******************************************************************************/
void IIC_Send_Byte(unsigned char txd)
{unsigned char t;IIC_Sda_Mod(1); // SDA设置为输出SCL_L();for(t = 0; t < 8; t++){if((txd & 0x80) >> 7)SDA_H();elseSDA_L();txd <<= 1;delay_us(2);SCL_H();delay_us(2);SCL_L();delay_us(2);}
}/******************************************************************************** Function Name : IIC_Read_Byte* Description : IIC读取一个字节* Input : ack - 是否发送ACK* Output : None* Return : 读取到的字节******************************************************************************/
unsigned char IIC_Read_Byte(unsigned char ack)
{unsigned char i, receive = 0;IIC_Sda_Mod(0); // SDA设置为输入for(i = 0; i < 8; i++){SCL_L();delay_us(2);SCL_H();receive <<= 1;if(HAL_GPIO_ReadPin(IIC_PORT, SDA_PIN)){receive++;}delay_us(1);}if(!ack)IIC_NAck();elseIIC_Ack();return receive;
}/******************************************************************************** Function Name : SgmWriteByte* Description : IIC写一个字节* Input : reg - 寄存器地址, data - 要写入的数据* Output : None* Return : 0 - 正常, 1 - 错误******************************************************************************/
unsigned char SgmWriteByte(unsigned char reg, unsigned char data)
{IIC_Start();IIC_Send_Byte(SGM_WRITE_ADDR); // 发送写命令if(IIC_Wait_Ack()){IIC_Stop();return 1;}IIC_Send_Byte(reg); // 写寄存器地址IIC_Wait_Ack();IIC_Send_Byte(data);if(IIC_Wait_Ack()){IIC_Stop();return 1;}IIC_Stop();return 0;
}/******************************************************************************** Function Name : SgmReadByte* Description : IIC读取一个字节* Input : reg - 寄存器地址* Output : None* Return : 读到的数据******************************************************************************/
unsigned char SgmReadByte(unsigned char reg)
{unsigned char temp1;IIC_Start();IIC_Send_Byte(SGM_WRITE_ADDR); // 发送写命令IIC_Wait_Ack();IIC_Send_Byte(reg); // 写寄存器地址IIC_Wait_Ack();IIC_Start();IIC_Send_Byte(SGM_READ_ADDR); // 发送读命令IIC_Wait_Ack();temp1 = IIC_Read_Byte(0);IIC_Stop();SEGGER_RTT_printf(0, "SgmReadByte: Reg 0x%02X = 0x%02X\n", reg, temp1);return temp1;
}/******************************************************************************** Function Name : SgmReadLen* Description : IIC连续读取* Input : reg - 寄存器地址, len - 要读取的长度, buf - 读取到的数据存储缓冲区* Output : None* Return : 0 - 正常, 1 - 错误******************************************************************************/
unsigned char SgmReadLen(unsigned char reg, unsigned char len, unsigned char *buf)
{IIC_Start();IIC_Send_Byte(SGM_WRITE_ADDR); // 发送写命令if(IIC_Wait_Ack()){IIC_Stop();return 1;}IIC_Send_Byte(reg); // 写寄存器地址IIC_Wait_Ack();IIC_Start();IIC_Send_Byte(SGM_READ_ADDR); // 发送读命令IIC_Wait_Ack();while(len){if(len == 1)*buf = IIC_Read_Byte(0);else*buf = IIC_Read_Byte(1);len--;buf++;}IIC_Stop();return 0;
}/******************************************************************************** Function Name : SGM41511_ReadAllRegisters* Description : Reads all registers from REG00 to REG0B* Input : None* Output : None* Return : None******************************************************************************/
void SGM41511_ReadAllRegisters(void)
{unsigned char reg_values[12];for (int i = 0; i <= 0x0B; i++){reg_values[i] = SgmReadByte(i);SEGGER_RTT_printf(0, "REG%02X: 0x%02X (0B:", i, reg_values[i]);// Print binary representationfor (int j = 7; j >= 0; j--){SEGGER_RTT_printf(0, "%d", (reg_values[i] >> j) & 1);}SEGGER_RTT_printf(0, ")\n");}
}void SGM41511_WriteReg00(uint8_t value)
{if (SgmWriteByte(REG00_ADDR, value) == 0){SEGGER_RTT_printf(0, "Successfully wrote 0x%02X to REG00\n", value);}else{SEGGER_RTT_printf(0, "Failed to write to REG00\n");}
}void SGM41511_WriteReg01(uint8_t value)
{if (SgmWriteByte(REG01_ADDR, value) == 0){SEGGER_RTT_printf(0, "Successfully wrote 0x%02X to REG01\n", value);}else{SEGGER_RTT_printf(0, "Failed to write to REG01\n");}
}void SGM41511_WriteReg07(uint8_t value)
{if (SgmWriteByte(REG07_ADDR, value) == 0){SEGGER_RTT_printf(0, "Successfully wrote 0x%02X to REG07\n", value);}else{SEGGER_RTT_printf(0, "Failed to write to REG07\n");}
}void SGM41511_WriteReg06(uint8_t value)
{if (SgmWriteByte(REG06_ADDR, value) == 0){SEGGER_RTT_printf(0, "Successfully wrote 0x%02X to REG06\n", value);}else{SEGGER_RTT_printf(0, "Failed to write to REG06\n");}
}void SGM41511_WriteReg05(uint8_t value)
{if (SgmWriteByte(REG05_ADDR, value) == 0){SEGGER_RTT_printf(0, "Successfully wrote 0x%02X to REG05\n", value);}else{SEGGER_RTT_printf(0, "Failed to write to REG05\n");}
}void SGM41511_WriteReg04(uint8_t value)
{if (SgmWriteByte(REG04_ADDR, value) == 0){SEGGER_RTT_printf(0, "Successfully wrote 0x%02X to REG04\n", value);}else{SEGGER_RTT_printf(0, "Failed to write to REG04\n");}
}void SGM41511_WriteReg03(uint8_t value)
{if (SgmWriteByte(REG03_ADDR, value) == 0){SEGGER_RTT_printf(0, "Successfully wrote 0x%02X to REG03\n", value);}else{SEGGER_RTT_printf(0, "Failed to write to REG03\n");}
}void SGM41511_WriteReg02(uint8_t value)
{if (SgmWriteByte(REG02_ADDR, value) == 0){SEGGER_RTT_printf(0, "Successfully wrote 0x%02X to REG02\n", value);}else{SEGGER_RTT_printf(0, "Failed to write to REG02\n");}
}
void SGM41511_WriteReg0B(uint8_t value)
{if (SgmWriteByte(REG0B_ADDR, value) == 0){SEGGER_RTT_printf(0, "Successfully wrote 0x%02X to REG0B\n", value);}else{SEGGER_RTT_printf(0, "Failed to write to REG0B\n");}
}SGM41511. h
/******************************************************************************
*Description :SGM41511 电源管理芯片驱动
*Author :
*Date :2021.01.22
*******************************************************************************/
#ifndef _SGM41511_H_
#define _SGM41511_H_
#include <stdint.h>
#include "main.h"
#include "stm32l4xx_hal.h"#define SCL_PIN GPIO_PIN_8
#define SDA_PIN GPIO_PIN_9
#define IIC_PORT GPIOB#define BAT_NCS_PIN GPIO_PIN_11
#define BAT_NCS_PORT GPIOE#define BAT_Psel_PIN GPIO_PIN_10
#define BAT_Psel_PORT GPIOE#define SGM_DEVICE_ADDR 0x6B
#define SGM_WRITE_ADDR ((SGM_DEVICE_ADDR<<1) | 0) // 0X6B <<1 0xD6
#define SGM_READ_ADDR ((SGM_DEVICE_ADDR<<1) | 1) // (0X6B << 1) + 1 0xD7#define REG00_ADDR 0x00REG00 (地址0x00):
//控制输入电流限制(IINDPM)
//使能/禁用HIZ模式
//控制STAT引脚功能#define REG01_ADDR 0x01#define REG02_ADDR 0x02
#define REG03_ADDR 0x03
#define REG04_ADDR 0x04
#define REG05_ADDR 0x05
#define REG06_ADDR 0x06
#define REG07_ADDR 0x07
#define REG08_ADDR 0x08
#define REG09_ADDR 0x09#define REG0A_ADDR 0x0A#define REG0B_ADDR 0x0B//REG0B (0x14):
//包含芯片ID信息，0x14可能表示这是SGM41511芯片。#define SDA_H() HAL_GPIO_WritePin(IIC_PORT, SDA_PIN, GPIO_PIN_SET)
#define SDA_L() HAL_GPIO_WritePin(IIC_PORT, SDA_PIN, GPIO_PIN_RESET)
#define SCL_H() HAL_GPIO_WritePin(IIC_PORT, SCL_PIN, GPIO_PIN_SET)
#define SCL_L() HAL_GPIO_WritePin(IIC_PORT, SCL_PIN, GPIO_PIN_RESET)#define BAT_NCS_H() HAL_GPIO_WritePin(BAT_NCS_PORT, BAT_NCS_PIN, GPIO_PIN_SET)
#define BAT_NCS_L() HAL_GPIO_WritePin(BAT_NCS_PORT, BAT_NCS_PIN, GPIO_PIN_RESET)#define BAT_Psel_H() HAL_GPIO_WritePin(BAT_Psel_PORT, BAT_Psel_PIN, GPIO_PIN_SET)
#define BAT_Psel_L() HAL_GPIO_WritePin(BAT_Psel_PORT, BAT_Psel_PIN, GPIO_PIN_RESET)void SGM41511_IIC_Init(void);
void IIC_Sda_Mod(unsigned char mod);
void IIC_Start(void);
void IIC_Stop(void);
void IIC_Send_Byte(unsigned char txd);
unsigned char IIC_Read_Byte(unsigned char ack);unsigned char IIC_Wait_Ack(void);
void IIC_Ack(void);
void IIC_NAck(void);
unsigned char SgmWriteByte(unsigned char reg,unsigned char data);
unsigned char SgmReadByte(unsigned char reg);
unsigned char SgmReadLen(unsigned char reg,unsigned char len,unsigned char *buf);
void SGM41511_ReadAllRegisters(void);
void SGM41511_WriteReg00(uint8_t value);
void SGM41511_WriteReg01(uint8_t value);
void SGM41511_WriteReg07(uint8_t value);
void SGM41511_WriteReg06(uint8_t value);
void SGM41511_WriteReg05(uint8_t value);
void SGM41511_WriteReg04(uint8_t value);
void SGM41511_WriteReg03(uint8_t value);
void SGM41511_WriteReg02(uint8_t value);
void SGM41511_WriteReg0B(uint8_t value);
#endif移植的话你只需把引脚定义改下即可。
freertos任务源码；
void Sgm41511_task(void *argument)
{/* USER CODE BEGIN Sgm41511_task *//* Infinite loop */SGM41511_IIC_Init();SGM41511_WriteReg00(0x17); // Write 0x17 to REG00 00010111SGM41511_WriteReg07(0xDC) ;// Write 0xDC to REG07 11011100 SGM41511_WriteReg06(0x9E) ;// Write 0x9E to REG06 10011110SGM41511_WriteReg05(0xB8) ;// Write 0xB8 to REG05 10111000SGM41511_WriteReg04(0x5B) ;// Write 0x5B to REG04 01011011SGM41511_WriteReg03(0x21) ;// Write 0x21 to REG03 00100001SGM41511_WriteReg02(0xE2) ;// Write 0xE2 to REG02 11100010SGM41511_WriteReg01(0x7E) ;// Write 0x7E to REG02 01111110SGM41511_WriteReg0B(0x94) ;// Write 0x94 to REG0B 10010100for(;;){SGM41511_ReadAllRegisters();//5s循环读取SGM41511所有寄存器信息osDelay(5000);}/* USER CODE END Sgm41511_task */
}逻辑main.c简单调用
void main(void)
{SGM41511_IIC_Init();SGM41511_WriteReg00(0x17); // Write 0x17 to REG00 00010111SGM41511_WriteReg07(0xDC) ;// Write 0xDC to REG07 11011100 SGM41511_WriteReg06(0x9E) ;// Write 0x9E to REG06 10011110SGM41511_WriteReg05(0xB8) ;// Write 0xB8 to REG05 10111000SGM41511_WriteReg04(0x5B) ;// Write 0x5B to REG04 01011011SGM41511_WriteReg03(0x21) ;// Write 0x21 to REG03 00100001SGM41511_WriteReg02(0xE2) ;// Write 0xE2 to REG02 11100010SGM41511_WriteReg01(0x7E) ;// Write 0x7E to REG02 01111110SGM41511_WriteReg0B(0x94) ;// Write 0x94 to REG0B 10010100
while(1){SGM41511_ReadAllRegisters();//5s循环读取SGM41511所有寄存器信息HAL_Delay(5000);}}SGM41511 寄存器各个的深度含义请在我的发布文章里找；
完整例程代码请下载：
通过网盘分享的文件：charge_iic.rar
链接: https://pan.baidu.com/s/1M393qc0XidG8LWjDKJmqAQ?pwd=4syw 提取码: 4syw
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