Avr Gcc Printf Serial Number

Does anyone know how to read the serial number from an Amontec Tiny? I'm trying to use two of them with the ft2232serial command in the interface section, but without a serial number I'm out of luck. We have seven of the Tinys here and if they came in with the serial number on the packing slip, no one wrote it on the device. A: The maximum download speed is currently about 1 MByte/s for J-Link BASE/PLUS and 3 MBytes/s for J-Link ULTRA+ and J-Link PRO when downloading into RAM. However, the actual speed depends on various factors, such as JTAG, clock speed, host CPU core etc. Dec 01, 2015  The Problem With printf printf is an excellent function that adds lots of utility to your programs. The big problem with it is that it is pretty large. When you use printf in your program, your code size automatically jumps by about 1,444 bytes to your code. This is a one time penalty, so if you are going to use printf once, you might as well use it as often as you want.

  1. Stm32 Gcc Printf
Avr gcc manual

Stm32 Gcc Printf

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I am trying to write a program that detects pixel level collision of bitmaps on a Teensy micro controller compiling with AVR-GCC. I am trying to work out how to calculate the position of a single byte of the bitmap on the screen and have been told I should be using pointers. I don't see the relationship between the physical address of a bitmap byte and it's position on the screen, but I would like to investigate. The problem is, I have no way of printing this address. AVR doesn't have printf and I don't know how to get it to display on the screen. Does anyone have a way of producing this address somehow in the terminal?

i.e. if I have a bitmap and want to print out the address of the first byte, what would I need to write to complete this:

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2 Answers

Avr gcc tutorial

Use snprintf and send the string to the terminal. It is very costly on the AVR uC. If you use gcc address spaces extensions you may have to link the support for the long numbers.

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Assuming you have a working printf(), this should work:

Where %p is how to print a void *. Other pointer types should be cast to void * in order to match, but I used a void * for the address into the framebuffer anyway.

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