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Initial version of rmt driver (#1525)

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* rmt driver initial version

* supporting conti mode plus interrupts

* using conitnous mode for sending more data

* working continous mode

* rmt driver cleanup after conti mode

* initial version of rmt driver

* adding a simple example

* adding channel and block locks

* modified of rmt interface for simpler/easier usage

* adding header sentinels, split interface to common and additional settings

* Fixes per code review + support for rx callback mode

* renamed internal structures and enums, fixed formatting

* cmake support for rmt

* refactored tx-conti interrupts to function to make it more readable

* added Tx and Rx examples

* added license headers

* minor updates per review

* used struct access, renamed defines, corrected diagram
This commit is contained in:
david-cermak
2018-09-17 23:19:27 +02:00
committed by Me No Dev
parent ea61563c69
commit 4e96bffe0e
7 changed files with 1314 additions and 0 deletions
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61
libraries/ESP32/examples/RMT/RMTLoopback/RMTLoopbakc.ino Normal file
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#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "freertos/event_groups.h"
#include "Arduino.h"
#include "esp32-hal.h"
rmt_data_t my_data[256];
rmt_data_t data[256];
rmt_obj_t* rmt_send = NULL;
rmt_obj_t* rmt_recv = NULL;
static EventGroupHandle_t events;
void setup()
{
Serial.begin(115200);
if ((rmt_send = rmtInit(18, true, RMT_MEM_64)) == NULL)
{
Serial.println("init sender failed\n");
}
if ((rmt_recv = rmtInit(21, false, RMT_MEM_192)) == NULL)
{
Serial.println("init receiver failed\n");
}
float realTick = rmtSetTick(rmt_send, 100);
printf("real tick set to: %fns\n", realTick);
}
void loop()
{
// Init data
int i;
for (i=0; i<255; i++) {
data[i].val = 0x80010001 + ((i%13)<<16) + 13-(i%13);
}
data[255].val = 0;
// Start receiving
rmtReadAsync(rmt_recv, my_data, 100, events, false, 0);
// Send in continous mode
rmtWrite(rmt_send, data, 100);
// Wait for data
xEventGroupWaitBits(events, RMT_FLAG_RX_DONE, 1, 1, portMAX_DELAY);
// Printout the received data plus the original values
for (i=0; i<60; i++)
{
Serial.printf("%08x=%08x ", my_data[i], data[i] );
if (!((i+1)%4)) Serial.println("\n");
}
Serial.println("\n");
delay(2000);
}