problem de code to calcul with arduino nano

Development Boards Arduino
1

i have an accelerometer who give me a value and with the line up i want transform value in acceleration value in G :

value send by accelerometer * quantum= acceleration value directly

512*0,00198= 1,01376 g that’s terrestrial gravity

with this code i don’t arrive to calcul temp 2

temp2 = temp2*0,00198;

error: invalid digit “9” in octal constant

i have change the equation in that

temp2 = temp2*(198/100000)

but when a look temp2 it’s 0

delay_us(100);

temp = read(ACCXMSB); //read msb

temp2 = temp << 8; // temp2 = 16BITS = msb (8bits) and lsb (8bits)

temp2 |= read(ACCXLSB);

temp2 = temp2 >> 2; // Get rid of two non-value bits in LSB

// temp2 = temp2*(198/100000);

Serial.print(“\t”);

Serial.print(“\t”);

Serial.print(temp2);

all work good without this line temp2 = temp2*(198/100000);

that show 512 as value

how can resolve this problem please and happy new year every boby!

2

Is temp2 of type (float)?

3

temp2 is : signed short

4

darche_j:
with this code i don’t arrive to calcul temp 2

temp2 = temp2*0,00198;

error: invalid digit “9” in octal constant

Quick thought: Does the Arduino IDE accept "," as a decimal marker, or does it accept only "."?

Happy Hunting,

Eric

5

that’s the solution think you !!! very think you

and happy new years