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。

meter.cpp@4:0607a2a46238, 2018-05-18 (annotated)

Committer:
Rhyme
Date:
Fri May 18 01:25:32 2018 +0000
Revision:
4:0607a2a46238
Parent:
3:bf8761c8eb17 
Changed the display value from 0.00 to 0.000

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Rhyme 0:d01def9cf41e 1 #include "mbed.h"
Rhyme 0:d01def9cf41e 2 #include <math.h>
Rhyme 0:d01def9cf41e 3 #include <string.h>
Rhyme 0:d01def9cf41e 4 #include "ILI9341.h"
Rhyme 0:d01def9cf41e 5 #include "Arial28x28.h"
Rhyme 0:d01def9cf41e 6 #include "meter.h"
Rhyme 0:d01def9cf41e 7 #include "main.h"
Rhyme 0:d01def9cf41e 8
Rhyme 0:d01def9cf41e 9 #ifndef M_PI
Rhyme 0:d01def9cf41e 10 #define M_PI 3.141593
Rhyme 0:d01def9cf41e 11 #endif
Rhyme 0:d01def9cf41e 12
Rhyme 0:d01def9cf41e 13 extern ILI9341 *tft ;
Rhyme 0:d01def9cf41e 14 extern meter *tacho ;
Rhyme 3:bf8761c8eb17 15 double SIN[451] ; /* sin table for 45 to 90 degrees in 0.1 deg step */
Rhyme 3:bf8761c8eb17 16 double COS[451] ; /* cos table for 45 to 90 degrees in 0.1 deg step */
Rhyme 0:d01def9cf41e 17
Rhyme 0:d01def9cf41e 18 static void fillTriTable(void)
Rhyme 0:d01def9cf41e 19 {
Rhyme 0:d01def9cf41e 20 double theta ;
Rhyme 0:d01def9cf41e 21 int i ;
Rhyme 1:d7f2aa328962 22 for (i = 0 ; i <= 450 ; i++ ) {
Rhyme 0:d01def9cf41e 23 theta = M_PI * (((double)(i + 450))/1800.0) ;
Rhyme 0:d01def9cf41e 24 SIN[i] = sin( theta ) ;
Rhyme 0:d01def9cf41e 25 COS[i] = cos( theta ) ;
Rhyme 0:d01def9cf41e 26 }
Rhyme 0:d01def9cf41e 27 }
Rhyme 0:d01def9cf41e 28
Rhyme 0:d01def9cf41e 29 meter::meter(int x, int y, int width, int height, float min, float max)
Rhyme 0:d01def9cf41e 30 {
Rhyme 0:d01def9cf41e 31 _x = x ;
Rhyme 0:d01def9cf41e 32 _y = y ;
Rhyme 0:d01def9cf41e 33 _w = width ;
Rhyme 0:d01def9cf41e 34 _h = height ;
Rhyme 0:d01def9cf41e 35 _min = min ;
Rhyme 0:d01def9cf41e 36 _max = max ;
Rhyme 0:d01def9cf41e 37 _center_x = _x + _w / 2 ;
Rhyme 0:d01def9cf41e 38 _center_y = _y + (2 * _h) / 3 ;
Rhyme 0:d01def9cf41e 39 fillTriTable() ;
Rhyme 0:d01def9cf41e 40 }
Rhyme 0:d01def9cf41e 41
Rhyme 0:d01def9cf41e 42 meter::~meter(void)
Rhyme 0:d01def9cf41e 43 {
Rhyme 0:d01def9cf41e 44 }
Rhyme 0:d01def9cf41e 45
Rhyme 0:d01def9cf41e 46 void meter::drawFrame(void)
Rhyme 0:d01def9cf41e 47 {
Rhyme 0:d01def9cf41e 48 tft->BusEnable(true) ;
Rhyme 0:d01def9cf41e 49 tft->fillrect(_x, _y, _x+ _w - 1, _y+(2 * _h)/3 - 1, White) ;
Rhyme 0:d01def9cf41e 50 tft->fillrect(_x, _y+(2 * _h)/3 - 1, _x + _w - 1, _y + _h - 1, Black) ;
Rhyme 0:d01def9cf41e 51 tft->rect(_x, _y, _x + _w - 1, _y + _h - 1, Green) ;
Rhyme 0:d01def9cf41e 52 tft->BusEnable(false) ;
Rhyme 0:d01def9cf41e 53 }
Rhyme 0:d01def9cf41e 54
Rhyme 0:d01def9cf41e 55 void meter::drawScale(void)
Rhyme 0:d01def9cf41e 56 {
Rhyme 0:d01def9cf41e 57 int x1, x2, y1, y2 ;
Rhyme 0:d01def9cf41e 58 double radius ;
Rhyme 0:d01def9cf41e 59 double append ;
Rhyme 0:d01def9cf41e 60 radius = _w / 2.0 ;
Rhyme 0:d01def9cf41e 61 tft->BusEnable(true) ;
Rhyme 0:d01def9cf41e 62 for (int i = 0 ; i < 450 ; i += 45 ) {
Rhyme 0:d01def9cf41e 63 x1 = (radius * COS[i] + 0.5) ;
Rhyme 0:d01def9cf41e 64 y1 = (radius * SIN[i] + 0.5) ;
Rhyme 0:d01def9cf41e 65 if ((i % 10) == 5) {
Rhyme 0:d01def9cf41e 66 append = 5 ;
Rhyme 0:d01def9cf41e 67 } else {
Rhyme 0:d01def9cf41e 68 append = 10 ;
Rhyme 0:d01def9cf41e 69 }
Rhyme 0:d01def9cf41e 70 x2 = ((radius + append) * COS[i] + 0.5) ;
Rhyme 0:d01def9cf41e 71 y2 = ((radius + append) * SIN[i] + 0.5) ;
Rhyme 0:d01def9cf41e 72 tft->line(_center_x + x1, _center_y - y1, _center_x + x2, _center_y - y2, Black) ;
Rhyme 0:d01def9cf41e 73 tft->line(_center_x - x1, _center_y - y1, _center_x - x2, _center_y - y2, Black) ;
Rhyme 0:d01def9cf41e 74 }
Rhyme 0:d01def9cf41e 75 tft->line(_center_x, _center_y - radius, _center_x, _center_y - (radius + 10), Black) ;
Rhyme 0:d01def9cf41e 76 tft->BusEnable(false) ;
Rhyme 0:d01def9cf41e 77 }
Rhyme 0:d01def9cf41e 78
Rhyme 0:d01def9cf41e 79 void meter::drawHand(float value)
Rhyme 0:d01def9cf41e 80 {
Rhyme 0:d01def9cf41e 81 static int prev_x1 = 0, prev_x2 = 0, prev_y1 = 0, prev_y2 = 0 ;
Rhyme 0:d01def9cf41e 82 int x1, x2, y1, y2 ;
Rhyme 0:d01def9cf41e 83 double theta ;
Rhyme 0:d01def9cf41e 84 double radius = _w / 20.0 ;
Rhyme 0:d01def9cf41e 85 double append = 8.0 * (_w / 20.0) ;
Rhyme 0:d01def9cf41e 86 int i ;
Rhyme 0:d01def9cf41e 87
Rhyme 0:d01def9cf41e 88 theta = 90.0 - (90.0 * (value / _max)) ;
Rhyme 1:d7f2aa328962 89 if (theta < 0.0) { theta = 0.0 ; }
Rhyme 1:d7f2aa328962 90 if (theta > 90.0) { theta = 90.0 ; }
Rhyme 0:d01def9cf41e 91 if (theta > 45.0) {
Rhyme 3:bf8761c8eb17 92 i = (10.0 * (90.0 - theta) + 0.5) ;
Rhyme 3:bf8761c8eb17 93 x1 = _center_x - (radius * COS[i] + 0.5) ;
Rhyme 3:bf8761c8eb17 94 x2 = _center_x - ((radius + append) * COS[i] + 0.5) ;
Rhyme 0:d01def9cf41e 95 } else {
Rhyme 3:bf8761c8eb17 96 i = (10.0 * theta + 0.5) ;
Rhyme 2:204e60dbd73d 97 x1 = _center_x + (radius * COS[i] + 0.5) ;
Rhyme 2:204e60dbd73d 98 x2 = _center_x + ((radius + append) * COS[i] + 0.5) ;
Rhyme 0:d01def9cf41e 99 }
Rhyme 1:d7f2aa328962 100
Rhyme 2:204e60dbd73d 101 y1 = _center_y - (radius * SIN[i] + 0.5) ;
Rhyme 2:204e60dbd73d 102 y2 = _center_y - ((radius + append) * SIN[i] + 0.5) ;
Rhyme 0:d01def9cf41e 103 tft->BusEnable(true) ;
Rhyme 3:bf8761c8eb17 104 tft->line(prev_x1, prev_y1, prev_x2, prev_y2, White) ; /* erase prev */
Rhyme 3:bf8761c8eb17 105 tft->line(x1, y1, x2, y2, Black) ; /* draw current */
Rhyme 0:d01def9cf41e 106 tft->BusEnable(false) ;
Rhyme 0:d01def9cf41e 107 prev_x1 = x1 ;
Rhyme 0:d01def9cf41e 108 prev_x2 = x2 ;
Rhyme 0:d01def9cf41e 109 prev_y1 = y1 ;
Rhyme 0:d01def9cf41e 110 prev_y2 = y2 ;
Rhyme 0:d01def9cf41e 111 }
Rhyme 0:d01def9cf41e 112
Rhyme 0:d01def9cf41e 113 void meter::draw(float value)
Rhyme 0:d01def9cf41e 114 {
Rhyme 0:d01def9cf41e 115 tft->BusEnable(true) ;
Rhyme 3:bf8761c8eb17 116 drawFrame() ;
Rhyme 3:bf8761c8eb17 117 drawScale() ;
Rhyme 3:bf8761c8eb17 118 drawHand(value) ;
Rhyme 3:bf8761c8eb17 119 drawValue(value) ;
Rhyme 0:d01def9cf41e 120 tft->BusEnable(false) ;
Rhyme 0:d01def9cf41e 121 }
Rhyme 0:d01def9cf41e 122
Rhyme 0:d01def9cf41e 123 void meter::drawValue(float value)
Rhyme 0:d01def9cf41e 124 {
Rhyme 0:d01def9cf41e 125 char str[32] ;
Rhyme 0:d01def9cf41e 126 int v1, v2 ;
Rhyme 0:d01def9cf41e 127 v1 = (int)value ;
Rhyme 4:0607a2a46238 128 v2 = ((int)(1000.0 * value) % 1000) ;
Rhyme 4:0607a2a46238 129 sprintf(str, "%d.%03d V", v1, v2) ;
Rhyme 0:d01def9cf41e 130 tft->BusEnable(true) ;
Rhyme 0:d01def9cf41e 131 tft->locate(80, 190) ;
Rhyme 0:d01def9cf41e 132 tft->printf(str) ;
Rhyme 0:d01def9cf41e 133 wait(0.01) ;
Rhyme 0:d01def9cf41e 134 tft->BusEnable(false) ;
Rhyme 0:d01def9cf41e 135 }
Rhyme 0:d01def9cf41e 136
Rhyme 0:d01def9cf41e 137 void meter::update(float value)
Rhyme 0:d01def9cf41e 138 {
Rhyme 3:bf8761c8eb17 139 tft->BusEnable(true) ;
Rhyme 3:bf8761c8eb17 140 drawHand(value) ;
Rhyme 3:bf8761c8eb17 141 drawValue(value) ;
Rhyme 3:bf8761c8eb17 142 tft->BusEnable(false) ;
Rhyme 0:d01def9cf41e 143 }