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Avoid converting value to a double

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No need to convert a value to double when all we want is a two digits converted to string.
This also avoids linking some math library, which saved almost 8K och program storage space.
This commit is contained in:
Mikael Degerfält 2019-06-04 23:25:21 +02:00
parent 5a3ccec2e6
commit 883dbf605e
1 changed files with 4 additions and 4 deletions
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8
NuEVI/menu.cpp
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@ -487,7 +487,7 @@ void drawMenuScreen(){
//Construct the title including voltage reading.
//Involves intricate splicing of the title string with battery voltage
char menuTitle[] = "MENU XXX Y.Y "; //Allocate string buffer of appropriate size with some placeholders
char menuTitle[] = "MENU XXX Y.YV"; //Allocate string buffer of appropriate size with some placeholders
char* splice1 = menuTitle + 13;
char* splice2 = menuTitle + 17;
@ -496,9 +496,9 @@ void drawMenuScreen(){
if (vMeterReading < 2294) {
memcpy(splice2, "LOW ", 3);
} else {
double voltage = map(vMeterReading,0,3030,0,50)*0.1;
dtostrf(voltage, 3, 1, splice2);
splice2[3]='V'; //Put the V at the end (last char of buffer before \0)
int voltage = map(vMeterReading,0,3030,0,50);
splice2[0] = (voltage/10)+'0';
splice2[2] = (voltage%10)+'0';
}
drawMenu(menuTitle, mainMenuCursor, 6,