75 lines
1.7 KiB
C++
75 lines
1.7 KiB
C++
#include "freertos/FreeRTOS.h"
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#include "freertos/task.h"
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#include "freertos/event_groups.h"
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#include "Arduino.h"
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#include "esp32-hal.h"
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#if CONFIG_IDF_TARGET_ESP32C3
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// ESP32 C3 has only 2 channels for RX and 2 for TX, thus MAX RMT_MEM is 128
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#define RMT_TX_PIN 4
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#define RMT_RX_PIN 5
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#define RMT_MEM_RX RMT_MEM_128
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#else
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#define RMT_TX_PIN 18
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#define RMT_RX_PIN 21
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#define RMT_MEM_RX RMT_MEM_192
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#endif
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rmt_data_t my_data[256];
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rmt_data_t data[256];
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rmt_obj_t* rmt_send = NULL;
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rmt_obj_t* rmt_recv = NULL;
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static EventGroupHandle_t events;
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void setup()
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{
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Serial.begin(115200);
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events = xEventGroupCreate();
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if ((rmt_send = rmtInit(RMT_TX_PIN, RMT_TX_MODE, RMT_MEM_64)) == NULL)
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{
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Serial.println("init sender failed\n");
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}
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if ((rmt_recv = rmtInit(RMT_RX_PIN, RMT_RX_MODE, RMT_MEM_RX)) == NULL)
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{
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Serial.println("init receiver failed\n");
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}
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float realTick = rmtSetTick(rmt_send, 100);
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printf("real tick set to: %fns\n", realTick);
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// both will keep same tick
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realTick = rmtSetTick(rmt_recv, 100);
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}
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void loop()
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{
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// Init data
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int i;
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for (i=0; i<255; i++) {
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data[i].val = 0x80010001 + ((i%13)<<16) + 13-(i%13);
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}
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data[255].val = 0;
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// Start receiving
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rmtReadAsync(rmt_recv, my_data, 100, events, false, 0);
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// Send in continous mode
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rmtWrite(rmt_send, data, 100);
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// Wait for data
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xEventGroupWaitBits(events, RMT_FLAG_RX_DONE, 1, 1, portMAX_DELAY);
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// Printout the received data plus the original values
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for (i=0; i<60; i++)
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{
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Serial.printf("%08x=%08x ", my_data[i].val, data[i].val );
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if (!((i+1)%4)) Serial.println("\n");
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}
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Serial.println("\n");
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delay(2000);
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}
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