/********************************** (C) COPYRIGHT ******************************* * File Name : temperature.c * Author : WCH * Version : V1.0.0 * Date : 2023/11/17 * Description : Temperature program body. ********************************************************************************* * Copyright (c) 2021 Nanjing Qinheng Microelectronics Co., Ltd. * Attention: This software (modified or not) and binary are used for * microcontroller manufactured by Nanjing Qinheng Microelectronics. *******************************************************************************/ /* *@Note *Internal temperature sensor routine: *Through the ADC channel 16, the output voltage value and temperature value of the internal *temperature sensor are collected. * */ #include "debug.h" #include "lib/telemetry/telemetry.h" /* Global Variable */ s16 Calibrattion_Val = 0; /********************************************************************* * @fn ADC_Function_Init * * @brief Initializes ADC collection. * * @return none */ void ADC_Function_Init(void) { ADC_InitTypeDef ADC_InitStructure={0}; RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE ); RCC_ADCCLKConfig(RCC_PCLK2_Div8); ADC_DeInit(ADC1); ADC_InitStructure.ADC_Mode = ADC_Mode_Independent; ADC_InitStructure.ADC_ScanConvMode = DISABLE; ADC_InitStructure.ADC_ContinuousConvMode = DISABLE; ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None; ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right; ADC_InitStructure.ADC_NbrOfChannel = 1; ADC_Init(ADC1, &ADC_InitStructure); ADC_Cmd(ADC1, ENABLE); ADC_BufferCmd(ADC1, DISABLE); //disable buffer ADC_ResetCalibration(ADC1); while(ADC_GetResetCalibrationStatus(ADC1)); ADC_StartCalibration(ADC1); while(ADC_GetCalibrationStatus(ADC1)); Calibrattion_Val = Get_CalibrationValue(ADC1); ADC_BufferCmd(ADC1, ENABLE); //enable buffer ADC_TempSensorVrefintCmd(ENABLE); } /********************************************************************* * @fn Get_ADC_Val * * @brief Returns ADCx conversion result data. * * @param ch - ADC channel. * ADC_Channel_0 - ADC Channel0 selected. * ADC_Channel_1 - ADC Channel1 selected. * ADC_Channel_2 - ADC Channel2 selected. * ADC_Channel_3 - ADC Channel3 selected. * ADC_Channel_4 - ADC Channel4 selected. * ADC_Channel_5 - ADC Channel5 selected. * ADC_Channel_6 - ADC Channel6 selected. * ADC_Channel_7 - ADC Channel7 selected. * ADC_Channel_8 - ADC Channel8 selected. * ADC_Channel_9 - ADC Channel9 selected. * ADC_Channel_10 - ADC Channel10 selected. * ADC_Channel_11 - ADC Channel11 selected. * ADC_Channel_12 - ADC Channel12 selected. * ADC_Channel_13 - ADC Channel13 selected. * ADC_Channel_14 - ADC Channel14 selected. * ADC_Channel_15 - ADC Channel15 selected. * ADC_Channel_16 - ADC Channel16 selected. * ADC_Channel_17 - ADC Channel17 selected. * * @return none */ u16 Get_ADC_Val(u8 ch) { u16 val; ADC_RegularChannelConfig(ADC1, ch, 1, ADC_SampleTime_239Cycles5 ); ADC_SoftwareStartConvCmd(ADC1, ENABLE); while(!ADC_GetFlagStatus(ADC1, ADC_FLAG_EOC )); val = ADC_GetConversionValue(ADC1); return val; } /********************************************************************* * @fn Get_ADC_Average * * @brief Returns ADCx conversion result average data. * * @param ch - ADC channel. * ADC_Channel_0 - ADC Channel0 selected. * ADC_Channel_1 - ADC Channel1 selected. * ADC_Channel_2 - ADC Channel2 selected. * ADC_Channel_3 - ADC Channel3 selected. * ADC_Channel_4 - ADC Channel4 selected. * ADC_Channel_5 - ADC Channel5 selected. * ADC_Channel_6 - ADC Channel6 selected. * ADC_Channel_7 - ADC Channel7 selected. * ADC_Channel_8 - ADC Channel8 selected. * ADC_Channel_9 - ADC Channel9 selected. * ADC_Channel_10 - ADC Channel10 selected. * ADC_Channel_11 - ADC Channel11 selected. * ADC_Channel_12 - ADC Channel12 selected. * ADC_Channel_13 - ADC Channel13 selected. * ADC_Channel_14 - ADC Channel14 selected. * ADC_Channel_15 - ADC Channel15 selected. * ADC_Channel_16 - ADC Channel16 selected. * ADC_Channel_17 - ADC Channel17 selected. * * @return val - The Data conversion value. */ u16 Get_ADC_Average(u8 ch,u8 times) { u32 temp_val=0; u8 t; u16 val; for(t=0;t4095||val==4095) return 4095; return (val+Calibrattion_Val); } s32 TempSensor_Volt_To_Temper_x10(s32 Value) { s32 Temper_x10; s32 Refer_Volt, Refer_Temper; s32 k = 43; // slope in mV/ˇăC // Read factory calibration values Refer_Volt = (s32)((*(u32 *)0x1FFFF720) & 0x0000FFFF); // mV at reference temp Refer_Temper = (s32)(((*(u32 *)0x1FFFF720) >> 16) & 0x0000FFFF); // ˇăC // Compute temperature in decicelsius // Formula: T_x10 = Tref*10 - ((V - Vref)*100 + k/2) / k // Multiply (V - Vref) by 100 to get tenths of ˇăC Temper_x10 = Refer_Temper * 10 - ((Value - Refer_Volt) * 100 + (k / 2)) / k; return Temper_x10; } s32 getTemperature(void) { u16 ADC_val; s32 val_mv; ADC_val = Get_ADC_Average( ADC_Channel_TempSensor, 10 ); ADC_val = Get_ConversionVal(ADC_val); val_mv = (ADC_val*3300/4096); return TempSensor_Volt_To_Temper(val_mv); } s16 getDeciTemperature(void) { u16 ADC_val; s32 val_mv; ADC_val = Get_ADC_Average( ADC_Channel_TempSensor, 10 ); ADC_val = Get_ConversionVal(ADC_val); val_mv = (ADC_val*3300/4096); s32 temp_x10 = TempSensor_Volt_To_Temper_x10(val_mv); int16_t temp16 = (int16_t)temp_x10; // store in 2 bytes return temp16; } s32 getVoltage(void) { u16 ADC_val; s32 val_mv; ADC_val = Get_ADC_Average( ADC_Channel_0, 10 ); ADC_val = Get_ConversionVal(ADC_val); val_mv = (ADC_val*3300/4096); return val_mv; } // Helper: convert signed 24-bit int to 3 bytes (big-endian) void int24_to_bytes(int32_t value, uint8_t *bytes) { if (value < 0) value += 0x1000000; // 2's complement for 24-bit bytes[0] = (value >> 16) & 0xFF; bytes[1] = (value >> 8) & 0xFF; bytes[2] = value & 0xFF; } // Encode GPS into CayenneLPP payload void encode_gps(uint8_t channel, float lat, float lon, float alt, uint8_t *payload) { payload[0] = channel; payload[1] = LPP_GPS; // GPS type int32_t latInt = lat * 10000; int32_t lonInt = lon * 10000; int32_t altInt = alt * 100; int24_to_bytes(latInt, &payload[2]); int24_to_bytes(lonInt, &payload[5]); int24_to_bytes(altInt, &payload[8]); }