翻訳を編集
I2C Code with 8051(Sensor ID:0x58)
/**
******************************************************************************
* @file Sencoch_Sensor_0x58_Driver.c
* @brief Generic I2C driver for Sencoch sensors with device address 0x58
* @version V2.0
* @date 2025-07-19
* @note Compatible with: 8051 series (AT89S52, STC89C52, 等)
* Supports all Sencoch sensors with I2C address 0x58
******************************************************************************
*/
#include <reg52.h>
#include <intrins.h>
#include <math.h>
#include <stdio.h>
/*============================================================================*/
/* Pin Definitions */
/*============================================================================*/
sbit SCL_PIN= P1^0;
sbit SDA_PIN= P1^1;
/*============================================================================*/
/* Sencoch Sensor I2C Configuration */
/*============================================================================*/
#define SENCOCH_I2C_ADDR0x58
#define SENCOCH_REG_DATA0x04
#define SENCOCH_REG_EOF0x20
#define SENCOCH_REG_SHIFT0x21
/*============================================================================*/
/* Sencoch Sensor Parameters */
/*============================================================================*/
/*
* NOTE: Modify PMIN and PMAX according to your specific sensor model
*
* Common Ranges for I2C ADD 0x58 Sensors (unit: Pa):
* 0 ~ 0.5kPa: PMIN = 0.0f, PMAX = 500.0f
* 0 ~ 5kPa: PMIN = 0.0f, PMAX = 5000.0f
* 0 ~ 1000kPa: PMIN = 0.0f, PMAX = 1000000.0f
* -1 ~ 1kPa: PMIN = -1000.0f, PMAX = 1000.0f
* -5 ~ 5kPa: PMIN = -5000.0f, PMAX = 5000.0f
* -100 ~ 100kPa: PMIN = -100000.0f, PMAX = 100000.0f
*/
#define PMIN-100000.0f
#define PMAX100000.0f
/*============================================================================*/
/* Data Buffer Definitions */
/*============================================================================*/
#define SENCOCH_READ_LEN5
/*============================================================================*/
/* Public Data Structure */
/*============================================================================*/
typedef struct {
signed long pressure_AD;
signed int temperature_AD;
unsigned char temp_calib_offset_code;
unsigned char temp_calib_gain_exp;
signed int eof_out;
float shift_n;
float プレッシャー;
float 温度;
} Sencoch_Sensor_Data_t;
/*============================================================================*/
/* Delay Functions */
/*============================================================================*/
static void delay_us(unsigned int us)
{
unsigned int i, j;
for (i= 0; i< us; i++) {
for (j= 0; j< 5; j++) {
_nop_();
}
}
}
static void delay_ms(unsigned int MS)
{
unsigned int i, j;
for (i= 0; i< MS; i++) {
for (j= 0; j< 125; j++) {
delay_us(8);
}
}
}
/*============================================================================*/
/* I2C Timing Generation */
/*============================================================================*/
static void I2C_Start(void)
{
SDA_PIN= 1;
delay_us(5);
SCL_PIN= 1;
delay_us(5);
SDA_PIN= 0;
delay_us(5);
SCL_PIN= 0;
delay_us(5);
}
static void I2C_Stop(void)
{
SDA_PIN= 0;
delay_us(5);
SCL_PIN= 1;
delay_us(5);
SDA_PIN= 1;
delay_us(5);
}
static unsigned char I2C_WaitAck(void)
{
unsigned char ack= 0;
SDA_PIN= 1;
delay_us(5);
SCL_PIN= 1;
delay_us(5);
if (SDA_PIN) {
ack= 1;
}
SCL_PIN= 0;
delay_us(5);
SDA_PIN= 0;
return ack;
}
static void I2C_SendByte(unsigned char byte)
{
unsigned char i;
for (i= 0; i< 8; i++) {
SCL_PIN= 0;
delay_us(5);
if (byte& 0x80) {
SDA_PIN= 1;
} else {
SDA_PIN= 0;
}
byte<<= 1;
delay_us(5);
SCL_PIN= 1;
delay_us(5);
}
SCL_PIN= 0;
delay_us(5);
}
static unsigned char I2C_ReadByte(unsigned char ack)
{
unsigned char i, byte= 0;
SDA_PIN= 1;
for (i= 0; i< 8; i++) {
byte<<= 1;
SCL_PIN= 1;
delay_us(5);
if (SDA_PIN) {
byte|= 0x01;
}
SCL_PIN= 0;
delay_us(5);
}
SDA_PIN= 0;
if (ack) {
SDA_PIN= 0;
} else {
SDA_PIN= 1;
}
delay_us(5);
SCL_PIN= 1;
delay_us(5);
SCL_PIN= 0;
delay_us(5);
return byte;
}
/*============================================================================*/
/* High-Level I2C Operations */
/*============================================================================*/
unsigned char Sencoch_ReadBytes(unsigned char reg_addr, unsigned char *data, unsigned char len)
{
I2C_Start();
I2C_SendByte(SENCOCH_I2C_ADDR<< 1);
if (I2C_WaitAck()) {
I2C_Stop();
return 1;
}
I2C_SendByte(reg_addr);
if (I2C_WaitAck()) {
I2C_Stop();
return 1;
}
I2C_Start();
I2C_SendByte((SENCOCH_I2C_ADDR<< 1) | 0x01);
if (I2C_WaitAck()) {
I2C_Stop();
return 1;
}