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50 lines
1.4 KiB
C
50 lines
1.4 KiB
C
#ifdef RMT_COMMUNICATIONS
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#include "driver/rmt_tx.h"
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#define RMT_RESOLUTION_HZ 3 * 1000 * 1000 // 3MHz resolution
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#define RMT_DURATION_SYMBOL 1 //0.667us
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#define RMT_DURATION_MAX (2 * RMT_DURATION_SYMBOL)
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//MANCHESTER ENCODING (ETHERNET STANDARD)
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/**
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* @brief This struct represents a 1 symbol being transmitted over RMT. This will create a falling edge (low for `RMT_DURATION_SYMBOL` and high for `RMT_DURATION_SYMBOL`)
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*
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*/
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static const rmt_symbol_word_t RMT_SYMBOL_ONE = {
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.duration0 = RMT_DURATION_SYMBOL,
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.level0 = 1,
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.duration1 = RMT_DURATION_SYMBOL,
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.level1 = 0,
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};
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/**
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* @brief This struct represents a 0 symbol being transmitted over RMT. This will create a rising edge (low for `RMT_DURATION_SYMBOL` and high for `RMT_DURATION_SYMBOL`)
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*
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*/
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static const rmt_symbol_word_t RMT_SYMBOL_ZERO = {
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.duration0 = RMT_DURATION_SYMBOL,
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.level0 = 0,
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.duration1 = RMT_DURATION_SYMBOL,
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.level1 = 1,
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};
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//not used at the moment
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// static const rmt_symbol_word_t RMT_SYMBOL_HIGH_STOP = {
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// .duration0 = RMT_DURATION_SYMBOL / 2,
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// .level0 = 1,
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// .duration1 = RMT_DURATION_SYMBOL / 2,
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// .level1 = 0,
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// };
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// static const rmt_symbol_word_t RMT_SYMBOL_LOW_STOP = {
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// .duration0 = RMT_DURATION_SYMBOL / 2,
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// .level0 = 0,
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// .duration1 = RMT_DURATION_SYMBOL / 2,
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// .level1 = 1,
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// };
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#endif //RMT_COMMUNICATIONS
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