67 lines
1.8 KiB
C++
67 lines
1.8 KiB
C++
#include <IRBlaster.hpp>
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/**
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* @brief Destroy the IRBlaster object
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*/
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IRBlaster::~IRBlaster()
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{
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ESP_ERROR_CHECK(rmt_driver_uninstall(channel));
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}
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/**
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* @brief Send an IR signal
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*
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* @param data The microseconds timing array produced by IRReceiver
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* @param size The number of elements in the array
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*/
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void IRBlaster::send(const uint16_t *data, const size_t size)
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{
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// Send a raw IR signal
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rmt_item32_t *items = new rmt_item32_t[size / 2 + size % 2];
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// data is in microseconds, we need to convert it to ticks
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// If the number of elements is odd, we need to add a 0 at the end
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for (size_t i = 0, j = 0; i < size; i += 2, j++)
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{
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items[j].level0 = 1;
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items[j].duration0 = data[i];
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items[j].level1 = 0;
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if (i + 1 < size)
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{
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items[j].duration1 = data[i+1];
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} else {
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items[j].duration1 = 0;
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}
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}
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ESP_ERROR_CHECK(rmt_write_items(channel, items, size / 2 + size % 2, false));
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delete[] items;
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}
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/**
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* @brief Construct a new IRBlaster object
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*
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* @param pin The pin to use for IR transmission
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* @param channel The RMT channel to use
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*/
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IRBlaster::IRBlaster(const uint8_t pin, rmt_channel_t channel)
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{
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this->channel = channel;
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gpio_num_t gpio = gpio_num_t(pin);
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rmt_config_t config = RMT_DEFAULT_CONFIG_TX(gpio, channel);
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config.clk_div = 80;
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config.tx_config.carrier_en = true;
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config.tx_config.carrier_freq_hz = 38000;
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ESP_ERROR_CHECK(rmt_config(&config));
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ESP_ERROR_CHECK(rmt_driver_install(channel, 0, 0));
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}
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/**
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* @brief Construct a new IRBlaster object
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* @note This constructor uses RMT_CHANNEL_0
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*
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* @param pin The pin to use for IR transmission
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*/
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IRBlaster::IRBlaster(const uint8_t pin)
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{
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IRBlaster(pin, RMT_CHANNEL_0);
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} |