121 lines
3.4 KiB
C
121 lines
3.4 KiB
C
|
// Copyright 2021 IOsetting <iosetting(at)outlook.com>
|
||
|
|
//
|
||
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
||
|
|
// you may not use this file except in compliance with the License.
|
||
|
|
// You may obtain a copy of the License at
|
||
|
|
//
|
||
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
||
|
|
//
|
||
|
|
// Unless required by applicable law or agreed to in writing, software
|
||
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
||
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||
|
|
// See the License for the specific language governing permissions and
|
||
|
|
// limitations under the License.
|
||
|
|
|
||
|
|
#ifndef __FW_DS18B20__
|
||
|
|
#define __FW_DS18B20__
|
||
|
|
|
||
|
|
#include "fw_hal.h"
|
||
|
|
|
||
|
|
/**
|
||
|
|
* DS18B20 - Programmable Resolution 1-Wire Digital Thermometer
|
||
|
|
*
|
||
|
|
* To-92 Pins:
|
||
|
|
* With the flat side facing you and with the leads pointing down, they are GND, DQ and Vdd
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
|
||
|
|
#define DS18B20_DQ P35
|
||
|
|
#define DS18B20_DQ_PULLUP() GPIO_SetPullUp(GPIO_Port_3, GPIO_Pin_5, HAL_State_ON)
|
||
|
|
#define DS18B20_DQ_INPUT() GPIO_P3_SetMode(GPIO_Pin_5, GPIO_Mode_Input_HIP)
|
||
|
|
#define DS18B20_DQ_OUTPUT() GPIO_P3_SetMode(GPIO_Pin_5, GPIO_Mode_InOut_OD)
|
||
|
|
#define DS18B20_DQ_LOW() DS18B20_DQ=RESET
|
||
|
|
#define DS18B20_DQ_HIGH() DS18B20_DQ=SET
|
||
|
|
|
||
|
|
/* OneWire commands */
|
||
|
|
#define ONEWIRE_CMD_RSCRATCHPAD 0xBE
|
||
|
|
#define ONEWIRE_CMD_WSCRATCHPAD 0x4E
|
||
|
|
#define ONEWIRE_CMD_CPYSCRATCHPAD 0x48
|
||
|
|
#define ONEWIRE_CMD_RECEEPROM 0xB8
|
||
|
|
#define ONEWIRE_CMD_RPWRSUPPLY 0xB4
|
||
|
|
#define ONEWIRE_CMD_SEARCHROM 0xF0
|
||
|
|
#define ONEWIRE_CMD_READROM 0x33
|
||
|
|
#define ONEWIRE_CMD_MATCHROM 0x55
|
||
|
|
#define ONEWIRE_CMD_SKIPROM 0xCC
|
||
|
|
|
||
|
|
#define DS18B20_FAMILY_CODE 0x28
|
||
|
|
#define DS18B20_CMD_ALARMSEARCH 0xEC
|
||
|
|
|
||
|
|
/* DS18B20 read temperature command */
|
||
|
|
#define DS18B20_CMD_CONVERTTEMP 0x44 /* Convert temperature */
|
||
|
|
#define DS18B20_DECIMAL_STEPS_12BIT 0.0625
|
||
|
|
#define DS18B20_DECIMAL_STEPS_11BIT 0.125
|
||
|
|
#define DS18B20_DECIMAL_STEPS_10BIT 0.25
|
||
|
|
#define DS18B20_DECIMAL_STEPS_9BIT 0.5
|
||
|
|
|
||
|
|
/* Bits locations for resolution */
|
||
|
|
#define DS18B20_RESOLUTION_R1 6
|
||
|
|
#define DS18B20_RESOLUTION_R0 5
|
||
|
|
|
||
|
|
typedef enum {
|
||
|
|
DS18B20_Resolution_9bits = 9, /*!< DS18B20 9 bits resolution */
|
||
|
|
DS18B20_Resolution_10bits = 10, /*!< DS18B20 10 bits resolution */
|
||
|
|
DS18B20_Resolution_11bits = 11, /*!< DS18B20 11 bits resolution */
|
||
|
|
DS18B20_Resolution_12bits = 12 /*!< DS18B20 12 bits resolution */
|
||
|
|
} DS18B20_Resolution_t;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Initialize DS18B20
|
||
|
|
*/
|
||
|
|
void DS18B20_Init(void);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Reset DS18B20
|
||
|
|
* @return bit value
|
||
|
|
*/
|
||
|
|
__BIT DS18B20_Reset(void);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Read one bit from DS18B20
|
||
|
|
* @return bit value
|
||
|
|
*/
|
||
|
|
__BIT DS18B20_ReadBit(void);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Read one byte from DS18B20
|
||
|
|
* @return byte value
|
||
|
|
*/
|
||
|
|
uint8_t DS18B20_ReadByte(void);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Write one bit to DS18B20
|
||
|
|
* @param b bit value
|
||
|
|
*/
|
||
|
|
void DS18B20_WriteBit(__BIT b);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Write one byte to DS18B20
|
||
|
|
* @param byte byte value
|
||
|
|
*/
|
||
|
|
void DS18B20_WriteByte(uint8_t byte);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Start all DS18B20
|
||
|
|
*/
|
||
|
|
void DS18B20_StartAll(void);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief If read bit is low, then device is not finished yet with calculation temperature
|
||
|
|
* @return bit value
|
||
|
|
*/
|
||
|
|
__BIT DS18B20_AllDone(void);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Read 16 bits temperature
|
||
|
|
* @return temperature value
|
||
|
|
*/
|
||
|
|
uint16_t DS18B20_ReadTemperature(void);
|
||
|
|
|
||
|
|
|
||
|
|
#endif // __DS18B20_H_
|