Ksenia Kondrashova
Very simple SW polling HYT humidity & temp sensor and show received data at TFT [NO TOUCHSCREEN USED]
Dependencies: FT800_2 HYT mbed
There is only one screen with relative humidity and temperature data received from HYT sensor, no touchscreen functionality.
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 HYT and FT800 libraries, please refer to the respective 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:
Photo
Проект для статьи "Как перестать бояться и полюбить mbed.[Часть 3]"
См. https://habrahabr.ru/users/uuuulala/topics/
Diff: main.cpp
- Revision:
- 0:580de84e379c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Tue Sep 20 14:00:46 2016 +0000
@@ -0,0 +1,82 @@
+#include "mbed.h"
+#include "FT_Platform.h"
+#include "HYT.h"
+
+/***********************************************************************************************************************/
+/* Declare and initialize FTDI FT800 controller according to SPI lines connected */
+
+//// SLSTK3400A
+HYT SENSOR (PD6, PD7); // sda, scl
+FT800 TFT (PE10, PE11, PE12, PE13, PB11, PD4); // mosi, miso, sck, ss, int, pd
+
+//// WIZwiki-W7500P
+//HYT SENSOR (D14, D15); // sda, scl
+//FT800 TFT (D11, D12, D13, D10, D9, D8); // mosi, miso, sck, ss, int, pd
+
+// ATSAMD21-XPRO
+//HYT SENSOR (PA08, PA09); // sda, scl
+//FT800 TFT (PA18, PA16, PA19, PA17, PA20, PA21); // mosi, miso, sck, ss, int, pd
+
+
+/***********************************************************************************************************************/
+/* HYT sensor polling cycle */
+void dataUpdate(void)
+{
+ SENSOR.MRCommand();
+ wait_ms(100);
+ SENSOR.DFCommand();
+}
+
+/***********************************************************************************************************************/
+/* Construct the screen and downloasd it to the TFT */
+void drawTimeScreen(void)
+{
+ // start FT800 display list
+ TFT.DLstart();
+ TFT.DL(CLEAR_COLOR_RGB(255, 255, 255));
+ TFT.DL(CLEAR(1, 1, 1));
+
+ TFT.DL(COLOR_RGB(0, 0, 0));
+ TFT.Text(11, 15, 30, 0, "Demo-project for habrahabr.ru");
+ TFT.Text(13, 15 + 40, 28, 0, "Using FT800 library and HYT library");
+
+ TFT.DL(COLOR_RGB(9, 40, 3));
+ TFT.DL(BEGIN(RECTS));
+ TFT.DL(VERTEX2II(11, 105, 0, 0));
+ TFT.DL(VERTEX2II(11 + 222, 105 + 100, 0, 0));
+
+ TFT.DL(COLOR_RGB(255, 255, 255));
+ TFT.Text(11 + 10, 105 + 10, 28, 0, "Relative humidity, %");
+ TFT.Number(11 + 10, 105 + 10 + 30, 31, 0, SENSOR.humidity);
+
+ TFT.DL(COLOR_RGB(9, 3, 40));
+ TFT.DL(BEGIN(RECTS));
+ TFT.DL(VERTEX2II(11 + 222 + 14, 105, 0, 0));
+ TFT.DL(VERTEX2II(11 + 222 + 14 + 222, 105 + 100, 0, 0));
+
+ TFT.DL(COLOR_RGB(255, 255, 255));
+ TFT.Text(11 + 222 + 14 + 10, 105 + 10, 28, 0, "Temperature, C");
+ TFT.Number(11 + 222 + 14 + 10, 105 + 10 + 30, 31, 0, SENSOR.temperature);
+
+ TFT.DL(COLOR_RGB(0, 0, 0));
+ TFT.Text(300, 105 + 100 + 35, 28, 0, "e-mail: xk@efo.ru");
+
+ TFT.DL(BEGIN(LINES));
+ TFT.DL(LINE_WIDTH(8));
+ TFT.DL(VERTEX2II(11, 15 + 40 + 30, 0, 0));
+ TFT.DL(VERTEX2II(460, 15 + 40 + 30, 0, 0));
+
+ // finish FT800 display list
+ TFT.DL(DISPLAY());
+ TFT.Swap();
+}
+
+/***********************************************************************************************************************/
+/* Main function */
+int main()
+{
+ while(1) {
+ dataUpdate();
+ drawTimeScreen();
+ }
+}
\ No newline at end of file