mirror of
https://github.com/mytechnotalent/Embedded-Hacking.git
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Kevin Thomas
73 lines
2.5 KiB
C
73 lines
2.5 KiB
C
/**
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* @file 0x0a_ir.c
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* @brief NEC IR (infrared) receiver driver for the Raspberry Pi Pico 2
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* @author Kevin Thomas
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* @date 2025
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*
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* MIT License
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*
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* Copyright (c) 2025 Kevin Thomas
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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* -----------------------------------------------------------------------------
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*
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* This driver demonstrates NEC infrared remote decoding using the
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* ir.c/ir.h driver. The IR receiver module output is connected to GPIO 5.
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* ir_getkey() blocks until a valid NEC frame is received or a timeout
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* occurs. Each decoded command byte is printed over UART in hex and decimal.
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*
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* Wiring:
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* GPIO5 -> IR receiver module OUT pin (e.g. VS1838B or TSOP4838)
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* 3.3V -> IR receiver module VCC
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* GND -> IR receiver module GND
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*/
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#include <stdio.h>
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#include "pico/stdlib.h"
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#include "ir.h"
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#define IR_GPIO 5
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/**
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* @brief Poll for an NEC frame and print the command if received
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*/
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static void _poll_and_print(void) {
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int command = ir_getkey();
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if (command >= 0)
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printf("NEC command: 0x%02X (%d)\r\n", command, command);
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}
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/**
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* @brief Application entry point for the NEC IR receiver demo
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*
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* Initializes the IR receiver on GPIO5 and continuously decodes
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* NEC frames, printing each command byte over UART.
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*
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* @return int Does not return
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*/
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int main(void) {
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stdio_init_all();
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ir_init(IR_GPIO);
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printf("NEC IR driver initialized on GPIO %d\r\n", IR_GPIO);
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printf("Press a button on your NEC remote...\r\n");
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while (true)
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_poll_and_print();
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}
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