1- // Copyright 2023 Espressif Systems (Shanghai) PTE LTD
1+ // Copyright 2025 Espressif Systems (Shanghai) PTE LTD
22//
33// Licensed under the Apache License, Version 2.0 (the "License");
44// you may not use this file except in compliance with the License.
3535rmt_data_t my_data[256 ];
3636rmt_data_t data[256 ];
3737
38- static EventGroupHandle_t events;
39- 4038#define RMT_FREQ 10000000 // tick time is 100ns
41- #define RMT_NUM_EXCHANGED_DATA 30
39+ #define RMT_NUM_EXCHANGED_DATA 32
4240
4341void setup () {
4442 Serial.begin (115200 );
45- events = xEventGroupCreate ();
4643
4744 if (!rmtInit (RMT_TX_PIN, RMT_TX_MODE, RMT_MEM_NUM_BLOCKS_1, RMT_FREQ)) {
4845 Serial.println (" init sender failed\n "
4946 }
5047 if (!rmtInit (RMT_RX_PIN, RMT_RX_MODE, RMT_MEM_RX, RMT_FREQ)) {
5148 Serial.println (" init receiver failed\n "
5249 }
50+ Serial.println ();
51+ Serial.println (" RMT tick set to: 100ns"
5352
5453 // End of transmission shall be detected when line is idle for 2us = 20*100ns
5554 rmtSetRxMaxThreshold (RMT_RX_PIN, 20 );
5655 // Disable Glitch filter
5756 rmtSetRxMinThreshold (RMT_RX_PIN, 0 );
5857
59- Serial.println (" real tick set to: 100ns"
60- Serial.printf (" \n Please connect GPIO %d to GPIO %d, now.\n "
61- }
62- 63- void loop () {
64- // Init data
65- int i;
66- for (i = 0 ; i < 255 ; i++) {
67- data[i].val = 0x80010001 + ((i % 13 ) << 16 ) + 13 - (i % 13 );
58+ // create multiple pulses with different width to be sent
59+ for (int i = 0 ; i < 255 ; i++) {
60+ data[i].level0 = 1 ; // HIGH
61+ data[i].duration0 = 1 + 13 - (i % 13 ); // number of Tick on High
62+ data[i].level1 = 0 ; // LOW
63+ data[i].duration1 = 1 + (i % 13 ); // number of Ticks on Low
6864 my_data[i].val = 0 ;
6965 }
7066 data[255 ].val = 0 ;
67+ Serial.println ();
68+ Serial.println (" ===================================================================================================="
69+ Serial.println (" Preloaded Data that will sent (time in 0.1us):"
70+ // Printout the received data plus the original values
71+ for (int i = 0 ; i < RMT_NUM_EXCHANGED_DATA; i++) {
72+ Serial.printf (" %08lx=[%c 0x%02x|%c 0x%02x] " val , data[i].level0 ? ' H' ' L' duration0 , data[i].level1 ? ' H' ' L' duration1 );
7173
74+ if (!((i + 1 ) % 4 )) {
75+ Serial.println ();
76+ }
77+ }
78+ Serial.println (" ===================================================================================================="
79+ Serial.printf (" Please connect GPIO %d to GPIO %d, now."
80+ Serial.println ();
81+ Serial.println ();
82+ }
83+ 84+ void loop () {
7285 // Start an async data read
7386 size_t rx_num_symbols = RMT_NUM_EXCHANGED_DATA;
7487 rmtReadAsync (RMT_RX_PIN, my_data, &rx_num_symbols);
@@ -84,13 +97,13 @@ void loop() {
8497 Serial.printf (" Got %d RMT symbols\n "
8598
8699 // Printout the received data plus the original values
87- for (i = 0 ; i < 60 ; i++) {
100+ for (int i = 0 ; i < RMT_NUM_EXCHANGED_DATA ; i++) {
88101 Serial.printf (" %08lx=%08lx " val , data[i].val );
89102 if (!((i + 1 ) % 4 )) {
90- Serial.println (" "
103+ Serial.println ();
91104 }
92105 }
93- Serial.println (" \n "
106+ Serial.println ();
94107
95- delay (500 );
108+ delay (2000 );
96109}
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