nrf52, 51 - IR Capture/Transmitter

• Capture IR Burst from any IR remote. Send captured or any predefined IR burst.
• Minimal use of CPU cycles. Completely based on PPI Channels
• This will work irrespective of the IR Protocol
• Tested with nRF SDK v15.3 & nrf52832 custom board (IR LED + TSOP38238)
• Required nRFX drivers PPI, Timer, LOG, Clock
• Have to be in 64MHz HFCLK
• Refer to the complete example project in Segger embedded studio

start_capturing(&ir_decode_task_completed);

//Capture completion callback
void ir_decode_task_completed (int number_of_bits, ir_data_t *ir_data_ptr) {
  nrf_delay_ms(5000);
  send_ir_burst(ir_data_ptr, number_of_bits, &ir_transmit_task_completed); //Sending what is received after 5 Secs
}
  
//Transmit task completed callback
void ir_transmit_task_completed (void) {
  start_capturing(&ir_decode_task_completed);
}

Sending IR Code

void send_ir_code () {

  //{{IR CARRIER ON or OFF, FOR_HOW_LONG_us}, {IR CARRIER ON or OFF, FOR_HOW_LONG_us}, ...}
  ir_data_t ir_code[] = {{1,9063}, {0,4472}, {1,541}, {0,551}, 
                         {1,538}, {0,552}, {1,537}, {0,1670}, 
                         {1,541}, {0,550}, {1,539}, {0,550}, 
                         {1,539}, {0,549}, {1,541}, {0,550}, 
                         {1,537}, {0,1670}, {1,541}, {0,550}};
  
  send_ir_burst(ir_code, sizeof(ir_code)/sizeof(ir_code[0]), &ir_transmit_task_completed);
}