kopia lustrzana https://github.com/SP8EBC/ParaTNC
first sketch of the dht22 sensor driver
Mateusz Lubecki
rodzic
06e970e5d7
commit
8329a94b52
Plik diff jest za duży
Load Diff
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@ -4,31 +4,40 @@
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# Add inputs and outputs from these tool invocations to the build variables
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C_SRCS += \
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../system/src/drivers/_dht22.c \
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../system/src/drivers/dallas.c \
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../system/src/drivers/dht22.c \
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../system/src/drivers/flash.c \
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../system/src/drivers/gpio_conf.c \
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../system/src/drivers/i2c.c \
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../system/src/drivers/ms5611.c \
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../system/src/drivers/sensirion_sht3x.c \
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../system/src/drivers/serial.c \
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../system/src/drivers/tx20.c \
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../system/src/drivers/user_interf.c
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OBJS += \
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./system/src/drivers/_dht22.o \
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./system/src/drivers/dallas.o \
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./system/src/drivers/dht22.o \
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./system/src/drivers/flash.o \
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./system/src/drivers/gpio_conf.o \
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./system/src/drivers/i2c.o \
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./system/src/drivers/ms5611.o \
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./system/src/drivers/sensirion_sht3x.o \
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./system/src/drivers/serial.o \
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./system/src/drivers/tx20.o \
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./system/src/drivers/user_interf.o
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C_DEPS += \
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./system/src/drivers/_dht22.d \
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./system/src/drivers/dallas.d \
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./system/src/drivers/dht22.d \
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./system/src/drivers/flash.d \
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./system/src/drivers/gpio_conf.d \
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./system/src/drivers/i2c.d \
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./system/src/drivers/ms5611.d \
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./system/src/drivers/sensirion_sht3x.d \
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./system/src/drivers/serial.d \
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./system/src/drivers/tx20.d \
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./system/src/drivers/user_interf.d
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@ -5,6 +5,7 @@
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# Add inputs and outputs from these tool invocations to the build variables
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C_SRCS += \
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../system/src/stm32f1-stdperiph/misc.c \
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../system/src/stm32f1-stdperiph/stm32f10x_exti.c \
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../system/src/stm32f1-stdperiph/stm32f10x_gpio.c \
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../system/src/stm32f1-stdperiph/stm32f10x_i2c.c \
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../system/src/stm32f1-stdperiph/stm32f10x_rcc.c \
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@ -13,6 +14,7 @@ C_SRCS += \
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OBJS += \
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./system/src/stm32f1-stdperiph/misc.o \
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./system/src/stm32f1-stdperiph/stm32f10x_exti.o \
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./system/src/stm32f1-stdperiph/stm32f10x_gpio.o \
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./system/src/stm32f1-stdperiph/stm32f10x_i2c.o \
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./system/src/stm32f1-stdperiph/stm32f10x_rcc.o \
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@ -21,6 +23,7 @@ OBJS += \
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C_DEPS += \
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./system/src/stm32f1-stdperiph/misc.d \
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./system/src/stm32f1-stdperiph/stm32f10x_exti.d \
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./system/src/stm32f1-stdperiph/stm32f10x_gpio.d \
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./system/src/stm32f1-stdperiph/stm32f10x_i2c.d \
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./system/src/stm32f1-stdperiph/stm32f10x_rcc.d \
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6
WIRING
6
WIRING
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@ -20,8 +20,12 @@ PB8 - DTR line from TX20 aneometr - green wire in original cable but it can be j
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PC6 - Dallas One Wire pin to DS termometer. Only one termometer can be used and it should be powered via separate +5V line,
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parasite power is not recommended.
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PC4 - DHT22 pin
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LEDS:
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Blue LED - DCD - lights up while controller is receiving APRS packet from radio.
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Green LED - If meteo is enabled this blinks when transmission from TX20 anemometr is correctly received.
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In 'non-meteo' mode it works as TX indicator and lights up when controler is transmitting data.
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In 'non-meteo' mode it works as TX indicator and lights up when controler is transmitting data.
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@ -0,0 +1,43 @@
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ConfigPath:
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0800242c: push {r4, lr}
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0800242e: mov r4, r0
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14 memcpy(p[0].call, "AKLPRZ", 6), p[0].ssid = 0;
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08002430: movs r2, #6
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08002432: ldr r1, [pc, #44] ; (0x8002460 <ConfigPath+52>)
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08002434: bl 0x8005d90 <memcpy>
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08002438: movs r3, #0
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0800243a: strb r3, [r4, #6]
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20 memcpy(p[1].call, _CALL, 6), p[1].ssid = _SSID;
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0800243c: movs r2, #6
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0800243e: ldr r1, [pc, #36] ; (0x8002464 <ConfigPath+56>)
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08002440: adds r0, r4, #7
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08002442: bl 0x8005d90 <memcpy>
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08002446: movs r3, #12
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08002448: strb r3, [r4, #13]
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21 memcpy(p[2].call, "WIDE2", 6), p[2].ssid = 1;
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0800244a: movs r2, #6
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0800244c: ldr r1, [pc, #24] ; (0x8002468 <ConfigPath+60>)
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0800244e: add.w r0, r4, #14
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08002452: bl 0x8005d90 <memcpy>
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08002456: movs r3, #1
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08002458: strb r3, [r4, #20]
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30 }
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0800245a: movs r0, #3
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0800245c: pop {r4, pc}
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0800245e: nop
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08002460: strh r4, [r5, #26]
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08002462: lsrs r0, r0, #32
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08002464: strh r0, [r3, #22]
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08002466: lsrs r0, r0, #32
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08002468: strh r4, [r6, #26]
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0800246a: lsrs r0, r0, #32
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path_len = ConfigPath(path);
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0800278e: ldr.w r8, [pc, #428] ; 0x800293c <main(int, char**)+468>
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08002792: mov r0, r8
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08002794: bl 0x800242c <ConfigPath>
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08002798: ldr r3, [pc, #332] ; (0x80028e8 <main(int, char**)+384>)
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0800279a: strb r0, [r3, #0]
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98 LedConfig();
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0800279c: bl 0x80023c8 <LedConfig>
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@ -12,7 +12,7 @@
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//#define _DBG_TRACE
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// Uncomment to enable all meteo functionality. TX20 anemometer, dallas termometer, MS5611 pressure sens
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//#define _METEO
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#define _METEO
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//#define _DIGI // Comment this do disable WIDE1-1 digipeating
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#define _MUTE_RF // TODO: Not yet implemented - This will make station RXonly and disable all data transmission
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19
src/main.cpp
19
src/main.cpp
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@ -36,6 +36,7 @@
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#include "drivers/ms5611.h"
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#include "drivers/i2c.h"
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#include "drivers/tx20.h"
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#include "drivers/_dht22.h"
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#include "aprs/wx.h"
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#endif
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@ -73,6 +74,8 @@ float temperature;
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float td;
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double pressure = 0.0;
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dht22Values dht;
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static void message_callback(struct AX25Msg *msg) {
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}
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@ -93,7 +96,8 @@ main(int argc, char* argv[])
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path_len = ConfigPath(path);
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#ifdef _METEO
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i2cConfigure();
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// DHT22_Init();
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// i2cConfigure();
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#endif
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LedConfig();
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AFSK_Init(&a);
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@ -102,6 +106,7 @@ main(int argc, char* argv[])
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TimerConfig();
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#ifdef _METEO
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dht22_init();
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DallasInit(GPIOC, GPIO_Pin_6, GPIO_PinSource6);
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TX20Init();
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#endif
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@ -115,10 +120,11 @@ main(int argc, char* argv[])
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TelemInterval = 10;
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#ifdef _METEO
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SensorReset(0xEC);
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// volatile uint32_t dht22_status = DHT22_GetReadings();
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// SensorReset(0xEC);
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td = DallasQuery();
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SensorReadCalData(0xEC, SensorCalData);
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SensorStartMeas(0);
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// SensorReadCalData(0xEC, SensorCalData);
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// SensorStartMeas(0);
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#endif
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aprs_msg_len = sprintf(aprs_msg, "=%07.2f%c%c%08.2f%c%c %s\0", (float)_LAT, _LATNS, _SYMBOL_F, (float)_LON, _LONWE, _SYMBOL_S, _COMMENT);
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@ -137,10 +143,11 @@ main(int argc, char* argv[])
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#ifdef _METEO
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temperature = SensorBringTemperature();
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dht22_comm(&dht);
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// temperature = SensorBringTemperature();
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td = DallasQuery();
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trace_printf("temperatura DS: %d\r\n", (int)td);
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pressure = (float)SensorBringPressure();
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// pressure = (float)SensorBringPressure();
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trace_printf("cisnienie MS: %d\r\n", (int)pressure);
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#endif
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@ -0,0 +1,43 @@
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/*
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* _dht22.h
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*
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* Created on: 17.04.2018
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* Author: mateusz
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*/
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#ifndef INCLUDE_DRIVERS__DHT22_H_
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#define INCLUDE_DRIVERS__DHT22_H_
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#define DHT22_START_SIG_DURATION 200
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#define DHT22_WAITING_FOR_START_RESP_DURATION 12
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#define DHT22_LOW_LEVEL_BEFORE_BIT 10
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#define DHT22_MAX_ZERO_DURATION 6
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#define DHT22_MIN_ONE_DURATION 10
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#define DHT22_INTERRUPT_DURATION 40
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#define DHT22_PIN_PORT GPIOC
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#define DHT22_PIN_CLOCK RCC_APB2Periph_GPIOC
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#define DHT22_PIN_PIN GPIO_Pin_4
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typedef enum dht22QF {
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DHT22_QF_FULL,
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DHT22_QF_DEGRADATED,
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DHT22_QF_UNAVALIABLE
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} dht22QF;
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typedef struct dht22Values {
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uint8_t humidity;
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uint16_t scaledTemperature;
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dht22QF qf;
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}dht22Values;
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#ifdef __cplusplus
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extern "C" {
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#endif
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void dht22_init(void);
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void dht22_comm(dht22Values *data);
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#ifdef __cplusplus
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}
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#endif
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#endif /* INCLUDE_DRIVERS__DHT22_H_ */
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@ -0,0 +1,23 @@
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/* Port and pin with DHT22 sensor*/
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#define DHT22_GPIO_PORT GPIOC
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#define DHT22_GPIO_CLOCK RCC_APB2Periph_GPIOC
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#define DHT22_GPIO_PIN GPIO_Pin_4
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/* DHT22_GetReadings response codes */
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#define DHT22_RCV_OK 0 // Return with no error
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#define DHT22_RCV_NO_RESPONSE 1 // No response from sensor
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#define DHT22_RCV_BAD_ACK1 2 // Bad first half length of ACK impulse
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#define DHT22_RCV_BAD_ACK2 3 // Bad second half length of ACK impulse
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#define DHT22_RCV_RCV_TIMEOUT 4 // It was timeout while receiving bits
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#ifdef __cplusplus
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extern "C" {
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#endif
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void DHT22_Init(void);
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uint32_t DHT22_GetReadings(void);
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uint16_t DHT22_DecodeReadings(void);
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uint16_t DHT22_GetHumidity(void);
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uint16_t DHT22_GetTemperature(void);
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#ifdef __cplusplus
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}
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#endif
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@ -0,0 +1,32 @@
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/*
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* sensirion_sht3x.h
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*
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* Created on: 02.01.2018
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* Author: mateusz
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*/
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#ifndef INCLUDE_DRIVERS_SENSIRION_SHT3X_H_
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#define INCLUDE_DRIVERS_SENSIRION_SHT3X_H_
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#include "drivers/i2c.h"
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#include <stdint.h>
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#define SHT3X_RADDR ((0x44 << 1) | 1 )
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#define SHT3X_WADDR (0x44 << 1)
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#define SHT3X_SS_LOW_NOSTREACH 0x2416
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/* C++ detection */
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#ifdef __cplusplus
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extern "C" {
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#endif
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void sht3x_start_measurement(void);
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void sht3x_read_measurements(uint16_t *temperature, uint16_t *humidity);
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/* C++ detection */
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#ifdef __cplusplus
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}
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#endif
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#endif /* INCLUDE_DRIVERS_SENSIRION_SHT3X_H_ */
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@ -0,0 +1,107 @@
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/*
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* _dht22.c
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*
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* Created on: 17.04.2018
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* Author: mateusz
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*/
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#include <stm32f10x_gpio.h>
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#include <stm32f10x_exti.h>
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#include "../drivers/_dht22.h"
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#include "../drivers/dallas.h" // for delay
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#include <stdint.h>
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#include <stdio.h>
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uint8_t bitsDuration[40];
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uint8_t currentBit;
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GPIO_InitTypeDef PORT_out, PORT_in;
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EXTI_InitTypeDef exti, exti_disable;
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void dht22_init(void) {
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memset(bitsDuration, 0x00, 40);
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currentBit = 0;
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/*
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* Initializing of the GPIO pin used to communicatie with sensor
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*/
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GPIO_StructInit(&PORT_out);
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GPIO_StructInit(&PORT_in);
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PORT_out.GPIO_Mode = GPIO_Mode_Out_OD;
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PORT_out.GPIO_Pin = DHT22_PIN_PIN;
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PORT_out.GPIO_Speed = GPIO_Speed_50MHz;
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GPIO_Init(DHT22_PIN_PORT,&PORT_out);
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PORT_in.GPIO_Mode = GPIO_Mode_IN_FLOATING;
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PORT_in.GPIO_Pin = DHT22_PIN_PIN;
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PORT_in.GPIO_Speed = GPIO_Speed_50MHz;
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EXTI_StructInit(&exti);
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exti.EXTI_Line = EXTI_Line4;
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exti.EXTI_Mode = EXTI_Mode_Interrupt;
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exti.EXTI_Trigger = EXTI_Trigger_Falling;
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exti.EXTI_LineCmd = ENABLE;
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EXTI_StructInit(&exti_disable);
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exti.EXTI_Line = EXTI_Line4;
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exti.EXTI_Mode = EXTI_Mode_Interrupt;
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exti.EXTI_Trigger = EXTI_Trigger_Falling;
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exti.EXTI_LineCmd = DISABLE;
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}
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void dht22_comm(dht22Values *in) {
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GPIO_Init(DHT22_PIN_PORT,&PORT_out);
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GPIO_SetBits(DHT22_PIN_PORT, DHT22_PIN_PIN);
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DallasConfigTimer();
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/*
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* Setting pin logic-low to initialize transfer.
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*/
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GPIO_ResetBits(DHT22_PIN_PORT, DHT22_PIN_PIN);
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delay_5us = DHT22_START_SIG_DURATION;
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while (delay_5us != 0);
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GPIO_SetBits(DHT22_PIN_PORT, DHT22_PIN_PIN);
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/*
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* Waiting for the response pulse from sensor
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*/
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GPIO_Init(DHT22_PIN_PORT,&PORT_in);
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delay_5us = DHT22_WAITING_FOR_START_RESP_DURATION;
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while (delay_5us != 0);
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uint8_t sensorResp = GPIO_ReadInputDataBit(DHT22_PIN_PORT, DHT22_PIN_PIN);
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if (sensorResp == Bit_SET) {
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in->qf = DHT22_QF_UNAVALIABLE;
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return; // if pin is still high it usually means that there is a problem with comm with the sensor
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}
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else;
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/*
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* Starting the edge detected interrupt on this pin (EXTI)
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*/
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GPIO_EXTILineConfig(GPIO_PortSourceGPIOC, GPIO_PinSource4);
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EXTI_Init(&exti);
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EXTI->FTSR |= 1 << 4;
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EXTI->IMR |= 1 << 4;
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NVIC_EnableIRQ(EXTI4_IRQn);
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delay_5us = DHT22_INTERRUPT_DURATION;
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return;
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/*
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* Now
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*/
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}
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void EXTI4_IRQHandler(void) {
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EXTI->PR |= EXTI_PR_PR4;
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bitsDuration[currentBit++] = delay_5us;
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delay_5us = DHT22_INTERRUPT_DURATION;
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if (currentBit >= 40) {
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EXTI_Init(&exti_disable);
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currentBit = 0;
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}
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}
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@ -0,0 +1,124 @@
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#include <stm32f10x_rcc.h>
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#include <stm32f10x_gpio.h>
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#include "../drivers/dallas.h"
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#include "../drivers/dht22.h"
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uint16_t bits[40];
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uint8_t hMSB = 0;
|
||||
uint8_t hLSB = 0;
|
||||
uint8_t tMSB = 0;
|
||||
uint8_t tLSB = 0;
|
||||
uint8_t parity_rcv = 0;
|
||||
|
||||
static GPIO_InitTypeDef PORT;
|
||||
|
||||
|
||||
void DHT22_Init(void) {
|
||||
RCC_APB2PeriphClockCmd(DHT22_GPIO_CLOCK,ENABLE);
|
||||
PORT.GPIO_Mode = GPIO_Mode_Out_PP;
|
||||
PORT.GPIO_Pin = DHT22_GPIO_PIN;
|
||||
PORT.GPIO_Speed = GPIO_Speed_50MHz;
|
||||
GPIO_Init(DHT22_GPIO_PORT,&PORT);
|
||||
}
|
||||
|
||||
uint32_t DHT22_GetReadings(void) {
|
||||
uint32_t wait;
|
||||
uint8_t i;
|
||||
|
||||
DallasConfigTimer();
|
||||
|
||||
// Generate start impulse for sensor
|
||||
DHT22_GPIO_PORT->BRR = DHT22_GPIO_PIN; // Pull down SDA (Bit_SET)
|
||||
delay_5us = 175; // delay 875us
|
||||
while (delay_5us != 0);
|
||||
DHT22_GPIO_PORT->BSRR = DHT22_GPIO_PIN; // Release SDA (Bit_RESET)
|
||||
|
||||
// Switch pin to input with Pull-Up
|
||||
PORT.GPIO_Mode = GPIO_Mode_IPU;
|
||||
GPIO_Init(DHT22_GPIO_PORT,&PORT);
|
||||
|
||||
// Wait for AM2302 to start communicate
|
||||
delay_5us = 80;
|
||||
while ((DHT22_GPIO_PORT->IDR & DHT22_GPIO_PIN) && (delay_5us > 0));
|
||||
if (delay_5us < 10) return DHT22_RCV_NO_RESPONSE;
|
||||
|
||||
// Check ACK strobe from sensor
|
||||
delay_5us = 20;
|
||||
while (!(DHT22_GPIO_PORT->IDR & DHT22_GPIO_PIN) && (delay_5us > 0));
|
||||
if ((delay_5us > 1) || (delay_5us < 3)) return DHT22_RCV_BAD_ACK1;
|
||||
|
||||
delay_5us = 20;
|
||||
while ((DHT22_GPIO_PORT->IDR & DHT22_GPIO_PIN) && (delay_5us > 0));
|
||||
if ((wait > 1) || (wait < 3)) return DHT22_RCV_BAD_ACK2;
|
||||
|
||||
// ACK strobe received --> receive 40 bits
|
||||
i = 0;
|
||||
while (i < 40) {
|
||||
// Measure bit start impulse (T_low = 50us)
|
||||
delay_5us = 4;
|
||||
while (!(DHT22_GPIO_PORT->IDR & DHT22_GPIO_PIN) && (delay_5us > 0));
|
||||
if (delay_5us <= 3) {
|
||||
// invalid bit start impulse length
|
||||
bits[i] = 0xffff;
|
||||
delay_5us = 4;
|
||||
while ((DHT22_GPIO_PORT->IDR & DHT22_GPIO_PIN) && (delay_5us > 0));
|
||||
} else {
|
||||
// Measure bit impulse length (T_h0 = 25us, T_h1 = 70us)
|
||||
delay_5us = 4;
|
||||
while ((DHT22_GPIO_PORT->IDR & DHT22_GPIO_PIN) && (delay_5us > 0));
|
||||
bits[i] = (delay_5us <= 3) ? delay_5us * 5 : 0xffff;
|
||||
}
|
||||
|
||||
i++;
|
||||
}
|
||||
|
||||
DallasDeConfigTimer();
|
||||
|
||||
for (i = 0; i < 40; i++) if (bits[i] == 0xffff) return DHT22_RCV_RCV_TIMEOUT;
|
||||
|
||||
return DHT22_RCV_OK;
|
||||
}
|
||||
|
||||
uint16_t DHT22_DecodeReadings(void) {
|
||||
uint8_t parity;
|
||||
uint8_t i = 0;
|
||||
|
||||
hMSB = 0;
|
||||
for (; i < 8; i++) {
|
||||
hMSB <<= 1;
|
||||
if (bits[i] > 7) hMSB |= 1;
|
||||
}
|
||||
hLSB = 0;
|
||||
for (; i < 16; i++) {
|
||||
hLSB <<= 1;
|
||||
if (bits[i] > 7) hLSB |= 1;
|
||||
}
|
||||
tMSB = 0;
|
||||
for (; i < 24; i++) {
|
||||
tMSB <<= 1;
|
||||
if (bits[i] > 7) tMSB |= 1;
|
||||
}
|
||||
tLSB = 0;
|
||||
for (; i < 32; i++) {
|
||||
tLSB <<= 1;
|
||||
if (bits[i] > 7) tLSB |= 1;
|
||||
}
|
||||
for (; i < 40; i++) {
|
||||
parity_rcv <<= 1;
|
||||
if (bits[i] > 7) parity_rcv |= 1;
|
||||
}
|
||||
|
||||
parity = hMSB + hLSB + tMSB + tLSB;
|
||||
|
||||
return (parity_rcv << 8) | parity;
|
||||
}
|
||||
|
||||
uint16_t DHT22_GetHumidity(void) {
|
||||
return (hMSB << 8) + hLSB;
|
||||
}
|
||||
|
||||
uint16_t DHT22_GetTemperature(void) {
|
||||
return (tMSB << 8) + tLSB;
|
||||
}
|
||||
|
|
@ -0,0 +1,44 @@
|
|||
/*
|
||||
* sensirion_sht3x.c
|
||||
*
|
||||
* Created on: 02.01.2018
|
||||
* Author: mateusz
|
||||
*/
|
||||
|
||||
|
||||
#include "drivers/sensirion_sht3x.h"
|
||||
|
||||
void sht3x_start_measurement(void) {
|
||||
uint32_t txbuff[3] = {0, 0, 0};
|
||||
txbuff[0] = (uint32_t)(SHT3X_SS_LOW_NOSTREACH & 0xFF00) >> 8;
|
||||
txbuff[1] = (uint32_t)SHT3X_SS_LOW_NOSTREACH & 0xFF;
|
||||
|
||||
while(i2cTXing != 0 && i2cRXing !=0); // je<6A>eli magistala i2c nie jest zaj<61>ta, tj nie nadaj<61> i nie odbiera
|
||||
i2cSendData(SHT3X_WADDR, txbuff, 0); // wys<79>anie danych pod adres 0xEC czyli do czujnika
|
||||
while(i2cTXing != 0);
|
||||
}
|
||||
|
||||
void sht3x_read_measurements(uint16_t *temperature, uint16_t *humidity) {
|
||||
// int rxbuff[6];
|
||||
// memset(rxbuff, 0x00, 6);
|
||||
|
||||
uint16_t temperature_raw = 0;
|
||||
uint16_t humidity_raw = 0;
|
||||
|
||||
float temperature_phy = 0;
|
||||
float himidity_phy = 0;
|
||||
|
||||
while(i2cTXing != 0 && i2cRXing !=0); // je<6A>eli magistala i2c nie jest zaj<61>ta, tj nie nadaj<61> i nie odbiera
|
||||
i2cReceiveData(SHT3X_RADDR, 0, 9); // odbi<62>r danych z czujnika
|
||||
while(i2cRXing !=0); // je<6A>eli magistala i2c nie jest zaj<61>ta, tj nie nadaj<61> i nie odbiera
|
||||
|
||||
temperature_raw = ((i2cRXData[0] << 8) | i2cRXData[1]);
|
||||
humidity_raw = ((i2cRXData[3] << 8) | i2cRXData[4]);
|
||||
|
||||
temperature_phy = -45.0f + 175.0f * (float)( temperature_raw / 65535.0f);
|
||||
|
||||
*temperature = (uint16_t)temperature_phy;
|
||||
|
||||
return;
|
||||
}
|
||||
|
||||
Ładowanie…
Reference in New Issue