A simple meter using Adafruit 2.8 TFT with touch v2
Dependencies: SPI_STMPE610 UniGraphic mbed vt100
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
- Committer:
- Rhyme
- Date:
- 2017-07-21
- Revision:
- 2:204e60dbd73d
- Parent:
- 1:d7f2aa328962
- Child:
- 3:bf8761c8eb17
File content as of revision 2:204e60dbd73d:
#include "mbed.h" #include <math.h> #include <string.h> #include "ILI9341.h" #include "Arial12x12.h" #include "Arial24x23.h" #include "Arial28x28.h" #include "Arial43x48_numb.h" #include "SPI_STMPE610.h" #include "meter.h" #include "vt100.h" #include "main.h" #ifndef M_PI #define M_PI 3.141593 #endif extern vt100 *tty ; extern ILI9341 *tft ; extern SPI_STMPE610 *tsc ; extern meter *tacho ; double SIN[451] ; double COS[451] ; static void fillTriTable(void) { double theta ; int i ; for (i = 0 ; i <= 450 ; i++ ) { theta = M_PI * (((double)(i + 450))/1800.0) ; SIN[i] = sin( theta ) ; COS[i] = cos( theta ) ; } } meter::meter(int x, int y, int width, int height, float min, float max) { _x = x ; _y = y ; _w = width ; _h = height ; _value = min ; _min = min ; _max = max ; _center_x = _x + _w / 2 ; _center_y = _y + (2 * _h) / 3 ; fillTriTable() ; } meter::~meter(void) { } void meter::drawFrame(void) { tft->BusEnable(true) ; tft->fillrect(_x, _y, _x+ _w - 1, _y+(2 * _h)/3 - 1, White) ; tft->fillrect(_x, _y+(2 * _h)/3 - 1, _x + _w - 1, _y + _h - 1, Black) ; tft->rect(_x, _y, _x + _w - 1, _y + _h - 1, Green) ; tft->BusEnable(false) ; } void meter::drawScale(void) { int x1, x2, y1, y2 ; double radius ; double append ; radius = _w / 2.0 ; tft->BusEnable(true) ; for (int i = 0 ; i < 450 ; i += 45 ) { x1 = (radius * COS[i] + 0.5) ; y1 = (radius * SIN[i] + 0.5) ; if ((i % 10) == 5) { append = 5 ; } else { append = 10 ; } x2 = ((radius + append) * COS[i] + 0.5) ; y2 = ((radius + append) * SIN[i] + 0.5) ; tft->line(_center_x + x1, _center_y - y1, _center_x + x2, _center_y - y2, Black) ; tft->line(_center_x - x1, _center_y - y1, _center_x - x2, _center_y - y2, Black) ; } tft->line(_center_x, _center_y - radius, _center_x, _center_y - (radius + 10), Black) ; tft->BusEnable(false) ; } void meter::drawHand(float value) { static int prev_x1 = 0, prev_x2 = 0, prev_y1 = 0, prev_y2 = 0 ; int x1, x2, y1, y2 ; double theta ; double radius = _w / 20.0 ; double append = 8.0 * (_w / 20.0) ; int i ; theta = 90.0 - (90.0 * (value / _max)) ; if (theta < 0.0) { theta = 0.0 ; } if (theta > 90.0) { theta = 90.0 ; } if (theta > 45.0) { i = (10.0 * (90.0 - theta + 45.0) + 0.5) - 450 ; x1 = _center_x -(radius * COS[i] + 0.5) ; x2 = _center_x -((radius + append) * COS[i] + 0.5) ; } else { i = (10.0 * (theta + 45.0) + 0.5) - 450 ; x1 = _center_x + (radius * COS[i] + 0.5) ; x2 = _center_x + ((radius + append) * COS[i] + 0.5) ; } y1 = _center_y - (radius * SIN[i] + 0.5) ; y2 = _center_y - ((radius + append) * SIN[i] + 0.5) ; tft->BusEnable(true) ; tft->line(prev_x1, prev_y1, prev_x2, prev_y2, White) ; tft->line(x1, y1, x2, y2, Black) ; tft->BusEnable(false) ; prev_x1 = x1 ; prev_x2 = x2 ; prev_y1 = y1 ; prev_y2 = y2 ; } void meter::draw(void) { } void meter::draw(float value) { tft->BusEnable(true) ; drawHand(_value) ; tft->BusEnable(false) ; } void meter::drawValue(float value) { char str[32] ; int v1, v2 ; v1 = (int)value ; v2 = ((int)(100.0 * value) % 100) ; sprintf(str, "%d.%02d V", v1, v2) ; tft->BusEnable(true) ; tft->locate(80, 190) ; tft->printf(str) ; wait(0.01) ; tft->BusEnable(false) ; } void meter::update(float value) { }