79 lines
2.1 KiB
C
79 lines
2.1 KiB
C
// Copyright 2021 IOsetting <iosetting(at)outlook.com>
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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/***
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* Example code of communication with single DS18B20
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*
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* Board: STC8H3K32
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*
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* Normal Power Mode:
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* P35 -> DQ
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* GND -> GND
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* 5V/3.3V -> VDD
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*
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* Parasite Power Mode:
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* Parasite power mode requires both DS18B20 GND and Vdd to be
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* connected to ground. The DQ pin is the data/parasite power line,
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* which requires a pull-up resistor (set by PxPU command)
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*
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* P35 -> DQ
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* GND -> GND -> VDD
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* 5V
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*/
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#include "fw_hal.h"
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#include "ds18b20.h"
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void PrintArray(uint8_t *arr, uint8_t start, uint8_t end)
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{
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uint8_t i;
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for (i = start; i < end; i++)
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{
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UART1_TxHex(*(arr + i));
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}
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}
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int main(void)
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{
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uint8_t buff[9], i;
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SYS_SetClock();
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// UART1, baud 115200, baud source Timer1, 1T mode, no interrupt
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UART1_Config8bitUart(UART1_BaudSource_Timer1, HAL_State_ON, 115200);
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DS18B20_Init();
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while(1)
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{
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DS18B20_StartAll();
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/*
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In Parasite Power Mode, replace the while block below with
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SYS_Delay(x), x can be [500, 1000]
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*/
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while (!DS18B20_AllDone())
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{
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UART1_TxChar('.');
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SYS_Delay(50);
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}
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DS18B20_ReadScratchpad(buff);
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PrintArray(buff, 0, 9);
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UART1_TxChar(' ');
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i = DS18B20_Crc(buff, 8);
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UART1_TxString("CRC:");
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UART1_TxHex(i);
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UART1_TxChar(' ');
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UART1_TxString("\r\n");
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SYS_Delay(1000);
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}
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}
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