Ksenia Kondrashova
[SIMPLE PROGRAM] HYT humidity & temp sensor polling / showing received data at TFT with capacitive touchscreen
Dependencies: FT800_2 HYT mbed
HYT humidity and temperature sensor polling & showing received data at TFT via graphical controller FT800/FT801.
Hardware
- HYT-271 / HYT-221 / HYT-939 humidity and temperature sensor by IST-AG
- TFT module uxTouch by Riverdi
- Break Out Board 20 by Riverdi
- Any mbed platform with I2C interface, SPI interface and 2 free GPIO for PD and INT signals
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:
Подробнее в статьях Как перестать бояться и полюбить mbed [Часть 1 - 5] на https://habrahabr.ru/users/uuuulala/topics/
Diff: TFT/display.Draw_CurrentValuesGraphs.cpp
- Revision:
- 0:1f5444f2977d
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/TFT/display.Draw_CurrentValuesGraphs.cpp Mon Sep 26 15:39:09 2016 +0000
@@ -0,0 +1,163 @@
+#include "display.h"
+
+/**************************************************************************************************************************
+************************** Display real-time humidity *********************************************************************
+**************************************************************************************************************************/
+void Display::CurrentHumidity(float humidity)
+{
+ // accelerator for x-axis data output
+ char accelerator = 6;
+ // create string including current humididty and " %"
+ CreateStringTempHum(humidityStr, humidity, 0);
+ // write the new scalable (* 1.5) data to the next available array position
+ currentHumidity_Y[currentHumidity_X] = (char)(humidity * 1.5);
+
+ // start FT800 display list
+ StartDL();
+
+ // draw bottom color for graph line
+ (*_TFT).DL(COLOR_RGB(200, 200, 200));
+ (*_TFT).DL(BEGIN(EDGE_STRIP_B));
+ for (int i = 0; i < 68; i++) {
+ if (currentHumidity_Y[i] != 0 && i <= currentHumidity_X) {
+ (*_TFT).DL(VERTEX2F((i * accelerator + 15) * 16, (220 - currentHumidity_Y[i]) * 16));
+ }
+ }
+
+ // draw horisontal grid for humidity (0 .. 100)
+ HorisontalGrid_CurrentHumidity();
+
+ // draw main graph line
+ (*_TFT).DL(COLOR_RGB(9, 0, 63));
+ (*_TFT).DL(BEGIN(POINTS));
+ (*_TFT).DL(POINT_SIZE(25));
+ for (int i = 0; i < 68; i++) {
+ if (currentHumidity_Y[i] != 0 && (i < currentHumidity_X || i >= currentHumidity_X + 13)) {
+ (*_TFT).DL(VERTEX2F((i * accelerator + 15) * 16, (222 - currentHumidity_Y[i]) * 16));
+ }
+ }
+
+ // draw subtitle for main graph line
+ (*_TFT).DL(COLOR_RGB(255, 255, 255));
+ (*_TFT).DL(BEGIN(RECTS));
+ (*_TFT).DL(VERTEX2II((currentHumidity_X * accelerator + 40) + 25, (200 - currentHumidity_Y[currentHumidity_X]), 0, 0));
+ (*_TFT).DL(VERTEX2II((currentHumidity_X * accelerator + 40), (177 - currentHumidity_Y[currentHumidity_X]), 0, 0));
+ (*_TFT).DL(COLOR_RGB(255, 0, 0));
+ (*_TFT).Text((currentHumidity_X * accelerator + 30), (180 - currentHumidity_Y[currentHumidity_X] - 7), 28, 0, humidityStr);
+ (*_TFT).DL(BEGIN(LINES));
+ (*_TFT).DL(LINE_WIDTH(8));
+ (*_TFT).DL(VERTEX2F((currentHumidity_X * accelerator + 15) * 16, (220 - currentHumidity_Y[currentHumidity_X]) * 16));
+ (*_TFT).DL(VERTEX2F((currentHumidity_X * accelerator + 35) * 16, (200 - currentHumidity_Y[currentHumidity_X]) * 16));
+ (*_TFT).DL(COLOR_RGB(255, 30, 33));
+ (*_TFT).DL(BEGIN(POINTS));
+ (*_TFT).DL(POINT_SIZE(33));
+ (*_TFT).DL(VERTEX2F((currentHumidity_X * accelerator + 15) * 16, (220 - currentHumidity_Y[currentHumidity_X]) * 16));
+ (*_TFT).DL(END());
+
+ // write main title
+ (*_TFT).DL(COLOR_RGB(0, 0, 0));
+ (*_TFT).Text(15, 15, 30, 0, "Current humidity, rH");
+
+ // clean the space under the plot, create link to the main menu
+ (*_TFT).DL(SCISSOR_XY(15, 222));
+ (*_TFT).DL(SCISSOR_SIZE(420, 53));
+ (*_TFT).Gradient(0, 256, 0xFFFFFF, 450, 16, 0xFFFFFF);
+ MainMenuReference();
+
+ // finish FT801 display list
+ FinishDL();
+
+ // manage the index for array
+ if (currentHumidity_X >= 68) {
+ currentHumidity_X = 0;
+ } else {
+ currentHumidity_X ++;
+ }
+ if (pressedButton == MENU_PRESS) {
+ for (int i = 0; i < 68; i++) {
+ currentHumidity_Y[i] = 0;
+ currentHumidity_X = 0;
+ }
+ }
+}
+
+/**************************************************************************************************************************
+************************** Display real-time temperature ******************************************************************
+**************************************************************************************************************************/
+void Display::CurrentTemperature(float temperature)
+{
+ // accelerator for x-axis data output
+ char accelerator = 6;
+ // create string including current temperature with decimal mark and " С"
+ CreateStringTempHum(temperatureStr, temperature, 1);
+ // write the new scalable (* 0.88 + 45) data to the next available array position
+ currentTemperature_Y[currentTemperature_X] = (char)(temperature * 0.88 + 45);
+
+ // start FT800 display list
+ StartDL();
+
+ // draw bottom color for graph line
+ (*_TFT).DL(COLOR_RGB(200, 177, 199));
+ (*_TFT).DL(BEGIN(EDGE_STRIP_B));
+ for (int i = 0; i < 68; i++) {
+ if (currentTemperature_Y[i] != 0 && i <= currentTemperature_X) {
+ (*_TFT).DL(VERTEX2F((i * accelerator + 15) * 16, (220 - currentTemperature_Y[i]) * 16));
+ }
+ }
+
+ // draw horisontal grid for temperature (-50 .. +125)
+ HorisontalGrid_CurrentTemp();
+
+ // draw main graph line
+ (*_TFT).DL(COLOR_RGB(9, 0, 63));
+ (*_TFT).DL(BEGIN(POINTS));
+ (*_TFT).DL(POINT_SIZE(25));
+ for (int i = 0; i < 68; i++) {
+ if (currentTemperature_Y[i] != 0 && (i < currentTemperature_X || i >= currentTemperature_X + 13)) {
+ (*_TFT).DL(VERTEX2F((i * accelerator + 15) * 16, (222 - currentTemperature_Y[i]) * 16));
+ }
+ }
+
+ // draw subtitle for main graph line
+ (*_TFT).DL(COLOR_RGB(255, 255, 255));
+ (*_TFT).DL(BEGIN(RECTS));
+ (*_TFT).DL(VERTEX2II((currentTemperature_X * accelerator + 40) + 25, (200 - currentTemperature_Y[currentTemperature_X]), 0, 0));
+ (*_TFT).DL(VERTEX2II((currentTemperature_X * accelerator + 40), (177 - currentTemperature_Y[currentTemperature_X]), 0, 0));
+ (*_TFT).DL(COLOR_RGB(255, 0, 0));
+ (*_TFT).Text((currentTemperature_X * accelerator + 25), (173 - currentTemperature_Y[currentTemperature_X]), 28, 0, temperatureStr);
+ (*_TFT).DL(BEGIN(LINES));
+ (*_TFT).DL(LINE_WIDTH(8));
+ (*_TFT).DL(VERTEX2F((currentTemperature_X * accelerator + 15) * 16, (220 - currentTemperature_Y[currentTemperature_X]) * 16));
+ (*_TFT).DL(VERTEX2F((currentTemperature_X * accelerator + 35) * 16, (200 - currentTemperature_Y[currentTemperature_X]) * 16));
+ (*_TFT).DL(COLOR_RGB(255, 30, 33));
+ (*_TFT).DL(BEGIN(POINTS));
+ (*_TFT).DL(POINT_SIZE(33));
+ (*_TFT).DL(VERTEX2F((currentTemperature_X * accelerator + 15) * 16, (220 - currentTemperature_Y[currentTemperature_X]) * 16));
+ (*_TFT).DL(END());
+
+ // write main title
+ (*_TFT).DL(COLOR_RGB(0, 0, 0));
+ (*_TFT).Text(15, 15, 30, 0, "Current temperature");
+
+ // clean the space under the plot, create link to the main menu
+ (*_TFT).DL(SCISSOR_XY(15, 225));
+ (*_TFT).DL(SCISSOR_SIZE(420, 53));
+ (*_TFT).Gradient(0, 256, 0xFFFFFF, 450, 16, 0xFFFFFF);
+ MainMenuReference();
+
+ // finish FT801 display list
+ FinishDL();
+
+ // manage the index for array
+ if (currentTemperature_X >= 68) {
+ currentTemperature_X = 0;
+ } else {
+ currentTemperature_X ++;
+ }
+ if (pressedButton == MENU_PRESS) {
+ for (int i = 0; i < 68; i++) {
+ currentTemperature_Y[i] = 0;
+ currentTemperature_X = 0;
+ }
+ }
+}
\ No newline at end of file