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feat: onewire and ds18b20 driver

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This commit is contained in:
Timothy Yin 2024-11-28 02:35:59 +08:00
parent 31482c9a70
commit 8edaf36a1a
9 changed files with 141 additions and 105 deletions
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3
.idea/editor.xml generated
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@ -147,7 +147,7 @@
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@ -338,5 +338,6 @@
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7
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@ -0,0 +1,7 @@
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18
lib/ds18b20/ds18b20.c Normal file
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@ -0,0 +1,18 @@
#include "ds18b20.h"
#include "onewire.h"
void DS18B20_startConvert(void) {
OneWire_init();
OneWire_writeByte(DS18B20_SKIP_ROM);
OneWire_writeByte(DS18B20_CONVERT_TEMP);
}
int DS18B20_readTemperature(void) {
OneWire_init();
OneWire_writeByte(DS18B20_SKIP_ROM);
OneWire_writeByte(DS18B20_READ_SCRATCHPAD);
uchar T_LSB = OneWire_readByte();
uchar T_MSB = OneWire_readByte();
int temp = T_MSB << 8 | T_LSB;
return temp;
}

20
lib/ds18b20/ds18b20.h Normal file
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@ -0,0 +1,20 @@
#ifndef __TEMP_H
#define __TEMP_H
#ifndef uchar
#define uchar unsigned char
#endif
#ifndef uint
#define uint unsigned int
#endif
#define DS18B20_SKIP_ROM 0xCC
#define DS18B20_CONVERT_TEMP 0x44
#define DS18B20_READ_SCRATCHPAD 0xBE
void DS18B20_startConvert(void);
int DS18B20_readTemperature(void);
#endif

58
lib/onewire/onewire.c Normal file
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@ -0,0 +1,58 @@
//
// Created by 5ANK41 on 2024/11/28.
#include "onewire.h"
uchar OneWire_init(void) {
uchar i;
ONE_WIRE_P = 1;
ONE_WIRE_P = 0;
i = 247;
while (--i);
ONE_WIRE_P = 1;
i = 32;
while (--i);
uchar ack = ONE_WIRE_P;
i = 247;
while (--i);
return ack;
}
void OneWire_writeBit(uchar _bit) {
uchar i;
ONE_WIRE_P = 0;
i = 4;
while (--i);
ONE_WIRE_P = _bit;
i = 24;
while (--i);
ONE_WIRE_P = 1;
}
void OneWire_writeByte(uchar _byte) {
for (uchar i = 0; i < 8; i++) {
OneWire_writeBit(_byte & 0x01 << i);
}
}
uchar OneWire_readBit(void) {
uchar i, _bit;
ONE_WIRE_P = 0;
i = 2;
while (--i);
ONE_WIRE_P = 1;
i = 2;
while (--i);
_bit = ONE_WIRE_P;
i = 24;
while (--i);
return _bit;
}
uchar OneWire_readByte(void) {
uchar _byte = 0x00;
for (uchar i = 0; i < 8; i++) {
if (OneWire_readBit()) { _byte |= 0x01 << i; }
}
return _byte;
}

30
lib/onewire/onewire.h Normal file
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@ -0,0 +1,30 @@
//
// Created by 5ANK41 on 2024/11/28.
//
#ifndef ONEWIRE_H
#define ONEWIRE_H
#include <8052.h>
#ifndef uchar
#define uchar unsigned char
#endif
#ifndef uint
#define uint unsigned int
#endif
#define ONE_WIRE_P P3_7
uchar OneWire_init(void);
void OneWire_writeBit(uchar _bit);
void OneWire_writeByte(uchar _byte);
uchar OneWire_readBit(void);
uchar OneWire_readByte(void);
#endif //ONEWIRE_H

78
lib/peripheral/temp.c
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@ -1,78 +0,0 @@
#include "temp.h"
void Delay1ms(uint y) {
uint x;
for(; y > 0; y--) {
for(x = 110; x > 0; x--);
}
}
uchar Ds18b20Init(void) {
uchar i;
DSPORT = 0; // Pull down bus
i = 70;
while(i--) {}
DSPORT = 1; // Pull up bus
i = 0;
while(DSPORT) {
Delay1ms(1);
i++;
if(i > 5) return 0;
}
return 1;
}
void Ds18b20WriteByte(uchar payload) {
uint i, j;
for(j = 0; j < 8; j++) {
DSPORT = 0;
i++;
DSPORT = payload & 0x01;
i = 6;
while(i--){}
DSPORT = 1;
payload >>= 1;
}
}
uchar Ds18b20ReadByte(void) {
uchar byte, bi;
uint i, j;
for(j = 8; j > 0; j--) {
DSPORT = 0;
i++;
DSPORT = 1;
i++;
i++;
bi = DSPORT;
byte = (byte >> 1) | (bi << 7);
i = 4;
while(i--);
}
return byte;
}
void Ds18b20ChangTemp(void) {
Ds18b20Init();
Delay1ms(1);
Ds18b20WriteByte(0xCC);
Ds18b20WriteByte(0x44);
}
void Ds18b20ReadTempCom() {
Ds18b20Init();
Delay1ms(1);
Ds18b20WriteByte(0xCC);
Ds18b20WriteByte(0xBE);
}
int Ds18b20ReadTemp() {
int temp = 0;
uchar th, tl;
Ds18b20ChangTemp();
Ds18b20ReadTempCom();
temp = th;
temp <<= 8;
temp |= tl;
return temp;
}

24
lib/peripheral/temp.h
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@ -1,24 +0,0 @@
#ifndef __TEMP_H
#define __TEMP_H
#include <8052.h>
#ifndef uchar
#define uchar unsigned char
#endif
#ifndef uint
#define uint unsigned int
#endif
#define DSPORT P3_7
void Delay1ms(uint y);
uchar Ds18b20Init(void);
void Ds18b20WriteByte(uchar payload);
uchar Ds18b20ReadByte(void);
void Ds18b20ChangTemp(void);
void Ds18b20ReadTempCom(void);
int Ds18b20ReadTemp(void);
#endif

8
src/main.c
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@ -1,7 +1,8 @@
#include <8052.h>
#include "serial_command.h"
#include "temp.h"
#include "onewire.h"
#include "ds18b20.h"
typedef unsigned int u16;
typedef unsigned char u8;
@ -199,7 +200,8 @@ void ProcessTempCmd(void) {
#endif
if (tempCmdCode == CTRL_CODE_TEMP_Enable) {
EA = 0;
temp = Ds18b20ReadTemp();
DS18B20_startConvert();
temp = DS18B20_readTemperature();
EA = 1;
tc = MCU_CMD_TEMP << 12;
td = (u16) temp & 0xFFF;
@ -222,6 +224,8 @@ int ProcessGasCmd(void) {
void main(void) {
int gasFlag, bodyFlag;
DS18B20_startConvert();
delay(100);
UsartInit();
while (1) {
ProcessCommand();