I'm writing an Arduino port for the LPC1114 chip (towards a systematically porting method for any microcontroller) and so far so good, until I discovered a (n extremely) code size increase when using floating point arithmetic (FPA). When Arduino UNO uses FPA the size code is barely increased; however in my Cortex-M0 the increasing is about 7 KB!
There must be something I'm overseeing in the LPCXpresso toolchain, so any hint is welcomed.
In both cases, LPCXpresso IDE and Wiring, the code is (roughly):
pinMode( LED_BUILTIN, OUTPUT );
digitalWrite( LED_BUILTIN, LOW );
Serial.begin( 115200, SERIAL_8N1 );
while( 1 )
int adcVal = analogRead( A0 );
Serial.println( (adcVal * 3.3) / 1023 );
delay( 100 );
ARDUINO: Sketch uses 3670 bytes from 32256
LPCXPRESSO: 13972 bytes out of 32KB (with -Os and NewLibNano(nohost) enabled)
Any comments are welcomed!