Motoo Tanaka
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。
Diff: meter.cpp
- Revision:
- 3:bf8761c8eb17
- Parent:
- 2:204e60dbd73d
- Child:
- 4:0607a2a46238
--- a/meter.cpp Fri Jul 21 01:24:53 2017 +0000
+++ b/meter.cpp Fri Jul 21 02:01:05 2017 +0000
@@ -2,25 +2,18 @@
#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] ;
+double SIN[451] ; /* sin table for 45 to 90 degrees in 0.1 deg step */
+double COS[451] ; /* cos table for 45 to 90 degrees in 0.1 deg step */
static void fillTriTable(void)
{
@@ -39,7 +32,6 @@
_y = y ;
_w = width ;
_h = height ;
- _value = min ;
_min = min ;
_max = max ;
_center_x = _x + _w / 2 ;
@@ -97,11 +89,11 @@
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) ;
+ i = (10.0 * (90.0 - theta) + 0.5) ;
+ 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 ;
+ i = (10.0 * theta + 0.5) ;
x1 = _center_x + (radius * COS[i] + 0.5) ;
x2 = _center_x + ((radius + append) * COS[i] + 0.5) ;
}
@@ -109,8 +101,8 @@
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->line(prev_x1, prev_y1, prev_x2, prev_y2, White) ; /* erase prev */
+ tft->line(x1, y1, x2, y2, Black) ; /* draw current */
tft->BusEnable(false) ;
prev_x1 = x1 ;
prev_x2 = x2 ;
@@ -118,14 +110,13 @@
prev_y2 = y2 ;
}
-void meter::draw(void)
-{
-}
-
void meter::draw(float value)
{
tft->BusEnable(true) ;
- drawHand(_value) ;
+ drawFrame() ;
+ drawScale() ;
+ drawHand(value) ;
+ drawValue(value) ;
tft->BusEnable(false) ;
}
@@ -145,4 +136,8 @@
void meter::update(float value)
{
+ tft->BusEnable(true) ;
+ drawHand(value) ;
+ drawValue(value) ;
+ tft->BusEnable(false) ;
}
\ No newline at end of file