Enlarging sum variable to avoid overflow. #38

Arduino UNO 16bit int overflows with a large summation, switching to int32_t
upsidedownlabs · Jan 3, 2024 · 18bd185 · 18bd185
1 parent 0c7e3bd
commit 18bd185
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/software/ClawController/ClawController.ino b/software/ClawController/ClawController.ino
@@ -25,6 +25,8 @@
 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 // SOFTWARE.
 
+#include <inttypes.h>
+
 #if defined(ESP32) 
   #include <ESP32Servo.h>
 #else
@@ -42,7 +44,8 @@
 #define SERVO_MAX 180
 
 int circular_buffer[BUFFER_SIZE];
-int data_index, sum;
+int32_t sum;
+int data_index;
 int flag=0;
 Servo servo;