IR remote + STM32 to usb, firmware and board

Simply combine decoding algorithm from post about decoding and USB keyboard driver from that post. Only one deal is left is decoding table. It will match codes of ir with keyboard button codes. Maybe if I get unuseful keyboard I will make IR wireless keyboard from it.

As for building and board assembling all like in previous devices. Building with my libraries and makefile using gcc. Two layer board using film photoresist, laser printer photomask and micro 1mm rivets. Here are some photos:

Decode table

Main work of that device is in matching IR codes to a keyboard codes. Then I can configure a applications on my PC to be runnable by keyboard hotkeys, written in this codetable. Here is fragment of codetable init function from file ir_remote.c:

void codeTableInit()
{
    codeTable[0].irCode = 0xd02f;
    codeTable[0].keyboardCode = 0x52;
    codeTable[1].irCode = 0xd629;
    codeTable[1].keyboardCode = 0x51;
    codeTable[2].irCode = 0x827d;
    ...
}

Firmware

As sayed in header the main idea of whole firmware in this function. It reads port with IR receiver connected to it. Applies just got sample to the decoder function. Then if decoder function is already recognized the code from any amount of concequtive samples, this function will find keyboard codes appropriate to obtained IR code. After it will send a USB keyboard report with necessary codes.

uint16_t code = detect((uint8_t)(IR_PORT & IR_PIN), 0xffff);
uint8_t report[8] = {0};
   if(code != 0xffff) {
   report[0] = codeTable[findCode(code)].tabCode;
   report[2] = codeTable[findCode(code)].keyboardCode;
   sendKbdReport(report);
   delay = 100;
}

This function is quiet compact, I like when I succeeed in writing compact and transparent code. Which do not need in any comments or any other documentation. Device usage example see in the next post.