Ksenia Kondrashova
Measuring air flow, relative humidity & temperature, then showing results at TFT
Dependencies: FT800_2 HYT mbed
Air flow is measured with FS7 sensor by IST-AG, humidity & temperature are measured by HYT-271 sensor by IST. Graphs displayed it TFT by Riverdi via graphical controller FFT801.
Hardware
- HYT-271 / HYT-221 / HYT-939 humidity and temperature sensor by IST-AG
- FS7 gas flow sensor by IST-AG
- FS-flowmodule for FS7 sensors
- TFT module uxTouch by Riverdi
- Break Out Board 20 by Riverdi
- Any mbed platform with I2C interface, SPI interface, 2 free GPIO for PD and INT signals and one ADC input.
For documentation on the FT800 library, please refer to the library pages.
Connection
MCU-board to TFT-module
MCU-board is connected to TFT-module via Break Out Board. You need 6 signals to connect: SCK, MOSI and MISO are connected to a SPI channel, SS is the chip select signal, PD work as powerdown and INT for interrupts from TFT to MCU.
You have to connect VDD to BLVDD at Break Out Board if you use the board:
MCU-board to HYT sensor
MCU-board is connected to sensor via I2C. Remember to use pull-up resisrors there:
MCU-board to FS7 sensor
MCU-board is connected to sensor via FS flowmodule. FS-flowmodul is a PCB implementing bridge circuit which is necessary for FS7.
Diff: TFT/Display.h
- Revision:
- 0:3f440c2facb0
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/TFT/Display.h Thu Mar 16 08:58:18 2017 +0000
@@ -0,0 +1,104 @@
+#include "mbed.h"
+#include "FT_Platform.h"
+#include "fonts.h"
+#include <string>
+
+#ifndef DISPLAY_H_
+#define DISPLAY_H_
+
+#define X_AXIS_MULTIPLIER 6
+#define POINTS_NUMBER 70
+
+#define Y_BOTTOM_OFFSET 17
+#define Y_UPPER_OFFSET 10
+#define X_LEFT_OFFSET 10
+
+#define BUTTON_1_WIDTH 136
+#define BUTTON_2_WIDTH 145
+#define BUTTON_3_WIDTH 120
+#define BUTTON_HEIGHT 30
+
+#define SET_FLOW_COLOR COLOR_RGB(100,46,79)
+#define SET_HUMIDITY_COLOR COLOR_RGB(52,67,94)
+#define SET_TEMPERATURE_COLOR COLOR_RGB(40,66,36)
+
+#define SET_FLOW_LOW_COLOR COLOR_RGB(66,40,52)
+#define SET_HUMIDITY_LOW_COLOR COLOR_RGB(33,43,61)
+#define SET_TEMPERATURE_LOW_COLOR COLOR_RGB(20,34,18)
+
+#define SET_GRAY_COLOR COLOR_RGB(100,100,100)
+#define SET_WHITE_COLOR COLOR_RGB(255,255,255)
+
+#define SET_BACKGROUND_COLOR COLOR_RGB(240,240,240)
+
+#define CLEAR_BACKGROUND_COLOR CLEAR_COLOR_RGB(240,240,240)
+#define BACKGROUND_COLOR 0xF0F0F0
+
+/**************************************************************************************************************************
+************************** Defines using for drawing **********************************************************************
+**************************************************************************************************************************/
+
+// all tracking touch screen areas
+typedef enum {
+ NONE_PRESS,
+ SHOW_HUMIDITY,
+ SHOW_FLOW,
+ SHOW_TEMPERATURE
+} pressValues;
+
+
+/**************************************************************************************************************************
+************************** User class for drawing at FT800 ****************************************************************
+**************************************************************************************************************************/
+
+class Display
+{
+public:
+ // in Display class we use FT800 TFT (definition is available in main.cpp)
+ Display(FT800 *TFT) {
+ _TFT = TFT;
+ }
+
+ void UpdateDataToDraw(uint8_t humidity, int8_t temperature, float flow);
+
+ // functions describing all available screens (screens-functions)
+ void MainScreen(); // [display.Draw_MainScreen.cpp]
+
+ // functions using to prepare FT800
+ void Calibration(void); // [display.Calibration.cpp]
+
+ void LoadImagesAndFonts(void); // [display.LoadImagesAndFonts.cpp]
+ void HandleAllBitmaps(void); // [display.LoadImagesAndFonts.cpp]
+
+ // functions for touch screen tracking
+ void GetTouch(void); // [display.GetTouch.cpp]
+
+ uint8_t pressedButton, buttonPressedPrev;
+ bool showHumidity, showFlow, showTemperature;
+
+private:
+ FT800 *_TFT;
+
+ void StartDL(void); // [display.DisplayListFunctions.cpp]
+ void FinishDL(void); // [display.DisplayListFunctions.cpp]
+
+ void VerticalGrid(void);
+ void HorisontalGrid(void);
+ void HorisontalGrid_Temperature(void); // [display.Draw_Grids.cpp]
+ void HorisontalGrid_Humidity(void); // [display.Draw_Grids.cpp]
+ void HorisontalGrid_Flow(void); // [display.Draw_Grids.cpp]
+
+
+ void CreateStringHumidity(char *str, uint8_t humidity); // [display.StringsTransforming.cpp]
+ void CreateStringFlow(char *str, float flow); // [display.StringsTransforming.cpp]
+ void CreateStringTemperature(char *str, int8_t temperature); // [display.StringsTransforming.cpp]
+ void CreateStringRussian(const string rustext); // [display.StringsTransform.cpp]
+
+ char humidityStr[8], temperatureStr[8], flowStr[8];
+ char russianStr[150];
+
+ uint8_t current_X;
+ int humidity_Y[POINTS_NUMBER + 1], temperature_Y[POINTS_NUMBER + 1], flow_Y[POINTS_NUMBER + 1];
+};
+
+#endif /* DISPLAY_H_ */