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。
Revision 4:0607a2a46238, committed 2018-05-18
- Comitter:
- Rhyme
- Date:
- Fri May 18 01:25:32 2018 +0000
- Parent:
- 3:bf8761c8eb17
- Commit message:
- Changed the display value from 0.00 to 0.000
Changed in this revision
| main.cpp | Show annotated file Show diff for this revision Revisions of this file |
| meter.cpp | Show annotated file Show diff for this revision Revisions of this file |
diff -r bf8761c8eb17 -r 0607a2a46238 main.cpp
--- a/main.cpp Fri Jul 21 02:01:05 2017 +0000
+++ b/main.cpp Fri May 18 01:25:32 2018 +0000
@@ -53,8 +53,8 @@
double value = 0.0 ;
int intvalue = 0 ;
value = ADC_MAX_VALUE * vin->read() ;
- intvalue = (int)(100.0 * value + 0.5) ;
- value = (double)intvalue / 100.0 ;
+ intvalue = (int)(1000.0 * value + 0.5) ;
+ value = (double)intvalue / 1000.0 ;
return( value ) ;
}
@@ -67,6 +67,7 @@
while(1) {
value = getRoundedValue() ;
+ printf("%.2f\n", value) ;
if (value != prev_value) {
tacho->update(value) ;
prev_value = value ;
diff -r bf8761c8eb17 -r 0607a2a46238 meter.cpp
--- a/meter.cpp Fri Jul 21 02:01:05 2017 +0000
+++ b/meter.cpp Fri May 18 01:25:32 2018 +0000
@@ -125,8 +125,8 @@
char str[32] ;
int v1, v2 ;
v1 = (int)value ;
- v2 = ((int)(100.0 * value) % 100) ;
- sprintf(str, "%d.%02d V", v1, v2) ;
+ v2 = ((int)(1000.0 * value) % 1000) ;
+ sprintf(str, "%d.%03d V", v1, v2) ;
tft->BusEnable(true) ;
tft->locate(80, 190) ;
tft->printf(str) ;