Ksenia Kondrashova / Mbed 2 deprecated Temp_&_RH_at_TFT_with_touchscreen

[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

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.

/media/uploads/Ksenia/4_-22-.jpg

You have to connect VDD to BLVDD at Break Out Board if you use the board:

/media/uploads/Ksenia/4_-5-.jpg

MCU-board to HYT sensor

MCU-board is connected to sensor via I2C. Remember to use pull-up resisrors there:

/media/uploads/Ksenia/freshpaint-20-2016.09.16-10.37.03.png

Подробнее в статьях Как перестать бояться и полюбить mbed [Часть 1 - 5] на https://habrahabr.ru/users/uuuulala/topics/

TFT/display.StringsTransforming.cpp

Committer:
Ksenia
Date:
2016-09-26
Revision:
0:1f5444f2977d

File content as of revision 0:1f5444f2977d:

#include "display.h"

/**************************************************************************************************************************
************************** Transform humiditity / temperature float value to string ***************************************
**************************************************************************************************************************/
// If isTemp = 0, string includes
// 1. current humididty
// 3. " %"

// If isTemp = 1, string includes
// 1. "-" (optional),
// 2. current temperature with decimal mark
// 3. " С"
void Display::CreateStringTempHum(char *str, float number, bool isTemp)
{
    short int multipedNumber = (short int)(number * 100);
    char strCnt = 0;
    if (isTemp) {
        if (multipedNumber < 0) {
            multipedNumber = -multipedNumber;
            str[strCnt] = '-';
            strCnt++;
        }
    }
    if (multipedNumber >= 10000) {
        str[strCnt] = '0' + (multipedNumber % 100000) / 10000;
        strCnt++;
    }
    if (multipedNumber >= 1000) {
        str[strCnt] = '0' + (multipedNumber % 10000) / 1000;
        strCnt++;
    }
    if (multipedNumber >= 100) {
        str[strCnt] = '0' + (multipedNumber % 1000) / 100;
        strCnt++;
    }
    if (isTemp) {
        str[strCnt] = '.';
        strCnt++;
        str[strCnt] = '0' + (multipedNumber % 100) / 10;
        strCnt++;
        str[strCnt] = ' ';
        strCnt++;
        str[strCnt] = 'C';
        strCnt++;
    } else {
        str[strCnt] = '%';
        strCnt++;
    }
    str[strCnt] = 0;
}