Totally biased, but there a book titled Beginning C for Arduino, 2nd Ed. by a guy named Purdum and the first two chapters contain exactly what you're looking for. Go to Amazon, read the reviews and see if it might fit your needs.
From: Jeffrey Peters <dek9jp@...> To:[email protected] Sent: Friday, December 15, 2017 9:31 PM Subject: [BITX20] Programing Help for updating Bitx40
#Bitx40help
Greetings group,
I am very new to programing and would really appreciate anyone who would be willing to reprogram my new BITX40 with the newest software . I would like to use my Bitx40 on the CW mode.? I am willing to learn about the reprogramming, but I do not have a clue where to start.? I have programed a Leno? with the blinking program, and even adjusted the time on and off by changing the code and reprogramming.? I just do not understand how to copy the updated code sketch and the libraries needed.?