Motoo Tanaka / Mbed 2 deprecated tester

A simple meter using Adafruit 2.8 TFT with touch v2

Dependencies:   SPI_STMPE610 UniGraphic mbed vt100

/media/uploads/Rhyme/tester_s.jpg

A dumb simple voltage tester using ADC.
With FRDM-KL25Z, you can measure about 0V to 3.28V.
Nothing to drop your jaw nor holding your breath
but I wanted one, so I wrote one ;-)

とても単純はADCを使用した電圧テスターです。
FRDM-KL25Z を使用した場合、0V ～ 3.28V くらいが測定範囲です。
特に目新しいことも、驚くこともありませんが、
自分が欲しいので書いてみました (^ - ^)

On 18-May-2018　
I changed the number display from 0.00 to 0.000
so that I can measure the change of a small loadcell.

2018年5月18日　
ロードセル (重量センサ)の出力値の変化を見たかったので
有効数字を小数点以下2桁から3桁に変更しました。

main.cpp@3:bf8761c8eb17, 2017-07-21 (annotated)

Committer:
Rhyme
Date:
Fri Jul 21 02:01:05 2017 +0000
Revision:
3:bf8761c8eb17
Parent:
0:d01def9cf41e
Child:
4:0607a2a46238
Some source code clean-ups done; The first document added

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Rhyme 3:bf8761c8eb17 1 /**
Rhyme 3:bf8761c8eb17 2 * main.cpp
Rhyme 3:bf8761c8eb17 3 */
Rhyme 0:d01def9cf41e 4 #include "mbed.h"
Rhyme 0:d01def9cf41e 5 #include "ILI9341.h"
Rhyme 0:d01def9cf41e 6 #include "Arial28x28.h"
Rhyme 0:d01def9cf41e 7 #include "vt100.h"
Rhyme 0:d01def9cf41e 8 #include "meter.h"
Rhyme 0:d01def9cf41e 9 #include "main.h"
Rhyme 0:d01def9cf41e 10
Rhyme 3:bf8761c8eb17 11 #define ADC_MAX_VALUE 3.28
Rhyme 3:bf8761c8eb17 12
Rhyme 0:d01def9cf41e 13 vt100 *tty = 0 ;
Rhyme 0:d01def9cf41e 14 ILI9341 *tft = 0 ;
Rhyme 0:d01def9cf41e 15 meter *tacho = 0 ;
Rhyme 0:d01def9cf41e 16
Rhyme 0:d01def9cf41e 17 DigitalOut *backlight = 0 ;
Rhyme 0:d01def9cf41e 18 AnalogIn *vin = 0 ;
Rhyme 0:d01def9cf41e 19
Rhyme 0:d01def9cf41e 20 float min_value = 0.0 ;
Rhyme 0:d01def9cf41e 21 float max_value = 3.3 ;
Rhyme 0:d01def9cf41e 22
Rhyme 0:d01def9cf41e 23 void initTFT(void)
Rhyme 0:d01def9cf41e 24 {
Rhyme 0:d01def9cf41e 25 //Configure the display driver
Rhyme 0:d01def9cf41e 26 tft->BusEnable(true) ;
Rhyme 0:d01def9cf41e 27 tft->FastWindow(true) ;
Rhyme 0:d01def9cf41e 28 tft->background(Black);
Rhyme 0:d01def9cf41e 29 tft->foreground(White);
Rhyme 0:d01def9cf41e 30 wait(0.01) ;
Rhyme 0:d01def9cf41e 31 tft->cls();
Rhyme 0:d01def9cf41e 32 tft->BusEnable(false) ;
Rhyme 0:d01def9cf41e 33 backlight = new DigitalOut(PIN_BL_TFT, 1) ;
Rhyme 0:d01def9cf41e 34 }
Rhyme 0:d01def9cf41e 35
Rhyme 0:d01def9cf41e 36 void init_hardware(void)
Rhyme 0:d01def9cf41e 37 {
Rhyme 0:d01def9cf41e 38 tty = new vt100() ;
Rhyme 0:d01def9cf41e 39 tty->cls() ;
Rhyme 0:d01def9cf41e 40 tft = new ILI9341(SPI_8, 10000000,
Rhyme 3:bf8761c8eb17 41 PIN_MOSI, PIN_MISO, PIN_SCLK,
Rhyme 3:bf8761c8eb17 42 PIN_CS_TFT, PIN_RESET_TFT, PIN_DC_TFT, "Adafruit2.8") ;
Rhyme 0:d01def9cf41e 43 initTFT() ;
Rhyme 0:d01def9cf41e 44 tft->set_font((unsigned char*) Arial28x28);
Rhyme 0:d01def9cf41e 45 tft->foreground(White) ;
Rhyme 0:d01def9cf41e 46 tacho = new meter(5, 5, 230, 230, 0.0, 3.3) ;
Rhyme 0:d01def9cf41e 47 vin = new AnalogIn(PIN_ADC_CH0) ;
Rhyme 3:bf8761c8eb17 48 *backlight = 1 ;
Rhyme 3:bf8761c8eb17 49 }
Rhyme 3:bf8761c8eb17 50
Rhyme 3:bf8761c8eb17 51 double getRoundedValue(void)
Rhyme 3:bf8761c8eb17 52 {
Rhyme 3:bf8761c8eb17 53 double value = 0.0 ;
Rhyme 3:bf8761c8eb17 54 int intvalue = 0 ;
Rhyme 3:bf8761c8eb17 55 value = ADC_MAX_VALUE * vin->read() ;
Rhyme 3:bf8761c8eb17 56 intvalue = (int)(100.0 * value + 0.5) ;
Rhyme 3:bf8761c8eb17 57 value = (double)intvalue / 100.0 ;
Rhyme 3:bf8761c8eb17 58 return( value ) ;
Rhyme 0:d01def9cf41e 59 }
Rhyme 0:d01def9cf41e 60
Rhyme 0:d01def9cf41e 61 int main() {
Rhyme 0:d01def9cf41e 62 float value = 0.0 ;
Rhyme 0:d01def9cf41e 63 float prev_value = 0.0 ;
Rhyme 3:bf8761c8eb17 64
Rhyme 0:d01def9cf41e 65 init_hardware() ;
Rhyme 3:bf8761c8eb17 66 tacho->draw(value) ;
Rhyme 3:bf8761c8eb17 67
Rhyme 0:d01def9cf41e 68 while(1) {
Rhyme 3:bf8761c8eb17 69 value = getRoundedValue() ;
Rhyme 0:d01def9cf41e 70 if (value != prev_value) {
Rhyme 3:bf8761c8eb17 71 tacho->update(value) ;
Rhyme 0:d01def9cf41e 72 prev_value = value ;
Rhyme 0:d01def9cf41e 73 }
Rhyme 3:bf8761c8eb17 74 wait(0.1) ;
Rhyme 0:d01def9cf41e 75 }
Rhyme 0:d01def9cf41e 76 }