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RMT refactoring based on IDF (#6024)

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Summary

RMT HAL refactoring based on IDF.

Impact

Improves RMT by adding IDF v4.4 support.
Receiving RMT can handle any size of data.
rmtInit() has a new parameter - RxBufferSize - to hold any number of data when receiving RMT.
rmtWrite() has a new parameter - wait_tx_done - to block writing until sending all data.

Related links

fix #5905
This commit is contained in:
Rodrigo Garcia
2021-12-21 10:02:40 -03:00
committed by GitHub
parent c66c7fe27e
commit 7cf162346a
6 changed files with 344 additions and 763 deletions
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18
libraries/ESP32/examples/RMT/RMTLoopback/RMTLoopback.ino
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@ -5,6 +5,17 @@
#include "esp32-hal.h"
#if CONFIG_IDF_TARGET_ESP32C3
// ESP32 C3 has only 2 channels for RX and 2 for TX, thus MAX RMT_MEM is 128
#define RMT_TX_PIN 4
#define RMT_RX_PIN 5
#define RMT_MEM_RX RMT_MEM_128
#else
#define RMT_TX_PIN 18
#define RMT_RX_PIN 21
#define RMT_MEM_RX RMT_MEM_192
#endif
rmt_data_t my_data[256];
rmt_data_t data[256];
@ -18,18 +29,19 @@ void setup()
Serial.begin(115200);
events = xEventGroupCreate();
if ((rmt_send = rmtInit(18, true, RMT_MEM_64)) == NULL)
if ((rmt_send = rmtInit(RMT_TX_PIN, RMT_TX_MODE, RMT_MEM_64)) == NULL)
{
Serial.println("init sender failed\n");
}
if ((rmt_recv = rmtInit(21, false, RMT_MEM_192)) == NULL)
if ((rmt_recv = rmtInit(RMT_RX_PIN, RMT_RX_MODE, RMT_MEM_RX)) == NULL)
{
Serial.println("init receiver failed\n");
}
float realTick = rmtSetTick(rmt_send, 100);
printf("real tick set to: %fns\n", realTick);
// both will keep same tick
realTick = rmtSetTick(rmt_recv, 100);
}
void loop()