Optimize PPM writer
Optimize PPM writer

iabdalkader/openmv,openmv/openmv,tianzhihen/openmv,SmartArduino/openmv,openmv/openmv,tianzhihen/openmv,iabdalkader/openmv,openmv/openmv,SmartArduino/openmv,kwagyeman/openmv,kwagyeman/openmv,kwagyeman/openmv,openmv/openmv,tianzhihen/openmv,SmartArduino/openmv,tianzhihen/openmv,SmartArduino/openmv,kwagyeman/openmv,iabdalkader/openmv,iabdalkader/openmv