snapclient/components/protocol/protocol.c

// MADIF protocol handler

// Read incomming messeage from queue and do the work

// Protocol description
/*
  0 Interface functions
      Scan clients on i2c bus.
      Get host system  (ESP32, RPI, Cypress)
      Select audio source (Snapcast, RTPrx, Bluetooth, Signal generator)
      Enable DSP processing
  1 Device communication I2C
  2 GPIO manipulation
  3 Audio generator
  4 Telemetri subsystem
  5 Test function
  6 RTPrx module
  7 DSP processor configuration
*/

#include "esp_log.h"
#include "esp_system.h"
#include "esp_types.h"
#include "freertos/FreeRTOS.h"
#include "freertos/queue.h"
#include "freertos/task.h"
#include "stdint.h"
//#include "MerusAudio.h"
#include "dsp_processor.h"
#include "i2s.h"
#include "protocol.h"
#include "rtprx.h"

extern enum dspFlows dspFlow;

xQueueHandle prot_queue;

// Protcol format
// Byte     0         1           2          3      4     ...
// Cont: Function   length   subCommand    data   <data>  ...

enum audio_sources
{
  SNAPCAST,
  RTPRX,
  BLUETOOTH,
  SIGNALGENERATOR
};
static const char TAG[] = "PROT";
static uint8_t audio_source;
extern uint8_t muteCH[4];

void
protocolHandlerTask (void *pvParameter)
{
  audio_source = 1;
  ESP_LOGI (TAG, "Protocol handler started");
  while (1)
    {
      uint8_t *msg;
      xQueueReceive (prot_queue, &msg, portMAX_DELAY);
      // ESP_LOGI(TAG,"Recieved message %d length %d",*(msg),*(msg+1));
      switch (*msg)
        {
        case 0: // Interface functions
          switch (*(msg + 2))
            {
            case 0:
              {
                ESP_LOGI (TAG, "Change Source to : %d\n", (int)*(msg + 3));
                if (audio_source != *(msg + 3))
                  {
                    if (audio_source == SNAPCAST)
                      {
                        i2s_custom_zero_dma_buffer (0);
                        // Not implemnted do nothing
                      }
                    else if (audio_source == RTPRX)
                      {
                        ESP_LOGI (TAG, "Stop RTPrx");
                        rtp_rx_stop ();
                      }
                    else if (audio_source == BLUETOOTH)
                      { // Not implemnted do nothing
                      }
                    else if (audio_source == SIGNALGENERATOR)
                      { // signalgenerator_stop();
                        ESP_LOGI (TAG, "Stop generator");
                      }
                  }
                audio_source = *(msg + 3);
                switch (audio_source)
                  {
                  case SNAPCAST:
                    break;
                  case RTPRX:
                    {
                      ESP_LOGI (TAG, "Start RTPrx");
                      rtp_rx_start ();
                    }
                    break;
                  case BLUETOOTH:
                    break;
                    // case SIGNALGENERATOR : { ESP_LOGI(TAG,"Start signal ");
                    //                       signalgenerator_start();
                    //                     }
                    //                  break;
                  default:
                    break;
                  }
              }
              break;
            case 1:
              {
                ESP_LOGI (TAG, "Measure system PVDD");
              }
              break;
            case 2:
              {
                ESP_LOGI (TAG, "Scan i2s bus...");
              }
              break;
            default:
              break;
            }
          break;
        case 1: // Device communication  // Fuse and otp decoding
          switch (*(msg + 2))
            {
            case 0: //   Byte read
              {
                uint8_t value = 0; // ma_read_byte( *(msg+3), *(msg+4),
                                   // (*(msg+5)<<8)+*(msg+6) ) ;
                printf ("Value read : %d\n", value);
                // return value to sender
                break;
              }
            case 1:
              { //   Byte write
                // ma_write_byte(*(msg+3),*(msg+4),(*(msg+5)<<8)+*(msg+6),*(msg+7)
                // );
                printf ("i2c_write : \n");
                break;
              }
            case 3:
              {
                uint8_t l = (*(msg + 1) - 7);
                uint8_t *writebuf;
                // ESP_LOGI(TAG,"I2C write block : %d\n",*(msg+7));
                writebuf = malloc (l);
                for (int8_t i = 0; i < l; i++)
                  writebuf[i] = *(msg + 7 + i);
                // ma_write(*(msg+3),*(msg+4),(*(msg+5)<<8)+*(msg+6),writebuf,l);
                break;
              }

            default:
              break;
            }
          break;
        case 2: // GPIO
          break;
        /*case 3 : // Signal Generator
                 switch (*(msg+2)) {
                     case 0: // Stop generator
                             signalgenerator_stop();
                             ESP_LOGI(TAG, "Stop_SignalGenerator
           :%d",*(msg+2)); break; case 1: // Start generator
                             signalgenerator_start();
                             ESP_LOGI(TAG, "Start_SignalGenerator
           :%d",*(msg+2)); break; case 2: // Change Mode :
                             signalgenerator_mode(*(msg+3));          // cont,
           sweep, burst ESP_LOGI(TAG, "SignalGenerator change mode
           :%d",*(msg+3)); break; case 3: // Change Oscillator Type  : // Sine,
           tri, square,  noise signalgenerator_osctype(*(msg+3)); ESP_LOGI(TAG,
           "SignalGenerator change oscType :%d",*(msg+3)); break; case 4:
           signalgenerator_freq(*(msg+3),*(msg+4),*(msg+5));   // freq int >> 4
                             break;
                     default : break;
                 }
                 break;
  */
        case 4:
          break;
        case 5:
          break;

        case 6: // RTPrx
          switch (*(msg + 2))
            {
            case 0: // Stop RX reciever
              rtp_rx_stop ();
              break;
            case 1: // Start Rx reciever
              rtp_rx_start ();
              break;
            default:
              break;
            }
          break;
        case 7: // DSP
          switch (*(msg + 2))
            {

            case 0: // Bypass 0 or 1 or 2
              dspFlow = (int)*(msg + 3);
              break;
            case 1: // Change Xover frequency
              // dsp_set_xoverfreq(*(msg+3),*(msg+4));
              break;
            case 99:
              {
                uint8_t ch = *(msg + 3);
                uint8_t state = *(msg + 4);
                printf ("Mute %d %d\n", ch, state);
                if ((ch <= 1) & (state <= 1))
                  {
                    muteCH[ch] = state;
                  }
              }
              break;

            default:
              break;
            }
          break;

        default:
          break;
        }
      free (msg);
    }
}