feat: onewire and ds18b20 driver

lib/ds18b20/ds18b20.c

@@ -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;
+}

lib/ds18b20/ds18b20.h

@@ -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

lib/onewire/onewire.c

@@ -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;
+}

lib/onewire/onewire.h

@@ -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

lib/peripheral/temp.c

@@ -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;
-}

lib/peripheral/temp.h

@@ -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