File content as of revision 0:2ddc0583bcec:

/**
 ******************************************************************************
 * @file    main.cpp
 * @author  Rosarium PILA, STMicroelectronics
 * @version V1.0.0
 * @date    May 17th, 2017
 * @brief   mbed HelloWorld P2P example for the STMicroelectronics X-NUCLEO-IDB01A4/5
 *          Spirit1 Expansion Board
 ******************************************************************************
 * @attention
 *
 * <h2><center>&copy; COPYRIGHT(c) 2017 STMicroelectronics</center></h2>
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *   1. Redistributions of source code must retain the above copyright notice,
 *      this list of conditions and the following disclaimer.
 *   2. Redistributions in binary form must reproduce the above copyright notice,
 *      this list of conditions and the following disclaimer in the documentation
 *      and/or other materials provided with the distribution.
 *   3. Neither the name of STMicroelectronics nor the names of its contributors
 *      may be used to endorse or promote products derived from this software
 *      without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 ******************************************************************************
 */

#include "mbed.h"
#include "SimpleSpirit1.h"

#define TEST_STR_LEN (32)  //512
static uint8_t send_buf[TEST_STR_LEN] ={'S','P','I','R','I','T','1',' ','H','E','L','L','O',' ','W','O','R','L','D',' ','P','2','P',' ','D','E','M','O'};
static uint8_t read_buf[TEST_STR_LEN] ={'0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0'};

#define PCKT_MARGIN (2) //32

//#define SIGNAL_BIT (0x1)                                                      //RPi //Removed OS dependency for mbed classic
//static osThreadId main_thread_id;                                             //RPi //Removed OS dependency for mbed classic

          
static SimpleSpirit1 &myspirit = SimpleSpirit1::CreateInstance(D11, D12, D3, D9, D10, D2); //RPi
bool SIGNAL_BIT = 0; //RPi
static int curr_len = 0;
unsigned char myValue = 0;

InterruptIn event(USER_BUTTON);                                                 //RPi //Added interrupt event to give userinterface to send pkt.

static void callback_func(int event) 
{
	if(event == SimpleSpirit1::RX_DONE) {
//		osSignalSet(main_thread_id, SIGNAL_BIT);                        //RPi //Removed OS dependency for mbed classic                
          SIGNAL_BIT = 1;
	} else if (event != SimpleSpirit1::TX_DONE) {
		printf("Got unexpected event %d\r\n", event);
	} else {
		printf("TX done!\n\r\n");
	}
}

void send_data(void)
{
  int cnt = 0;
  cnt++;
  if(cnt >= MAX_PACKET_LEN) cnt = 0;
  
  printf("\r\n***Sending a packet***\r\nSent string ='%s' (len=%d)\n\r", send_buf, strlen((const char*)send_buf) + 1);  
  
  uint32_t before_cca = us_ticker_read();
  while(myspirit.is_receiving()); // wait for ongoing RX ends
  uint32_t after_cca = us_ticker_read();
  
  curr_len = strlen((const char*)send_buf) + 1;
  myspirit.send(send_buf, curr_len);
  uint32_t after_send = us_ticker_read();
  
  printf("CCA time: %uus\n", (unsigned int)(after_cca - before_cca));
  printf("Send time: %uus\n\r", (unsigned int)(after_send - after_cca));
}

int main() 
{
  //	osStatus ret;                                                           //RPi //Removed OS dependency for mbed classic

  unsigned int pckts_fails = 0;
  unsigned int first_failed_packet = 0;
  unsigned int last_failed_packet = 0;
  int validate_cnt = -1;
  
  //	main_thread_id = Thread::gettid();                                      //RPi //Removed OS dependency for mbed classic
  
  
  DigitalOut TestLED = D5; //RPi //LED of IDS01A4/5
  TestLED = 0; //RPi //LED off
  
  myspirit.attach_irq_callback(callback_func);
  
  myspirit.on();
  
  printf("\n**************HelloWorld mbed demo for Spirit1 (X-NUCLEO-IDS01A4/5)**************\r\n");
  printf("\nPress User Button on one of the two boards to send a packaet to the other and the LED D1 on the receiver X-NUCLEO-IDS01A4/5 should toggle \n\r\n");
  
  while(1) 
  {
    
    event.rise(&send_data); //RPi // Added User button interrupt trigger to send data
    
    if(SIGNAL_BIT) //RPi //Data pkt received
    {
      SIGNAL_BIT = 0; 
      
      for(unsigned int flush_count = 0; flush_count < TEST_STR_LEN; flush_count++) read_buf[flush_count] = 0 ;//RPi//clear the read buffer
      
      int ret = myspirit.read(read_buf, sizeof(read_buf));
      
      myValue = 1 - myValue; //RPi //Toggle LED at the receiver
      TestLED = myValue;     //RPi //Toggle LED at the receiver
      
      if(ret == 0) {
        printf("\nNothing to read\n\r");
        continue;
      }
      int len = strlen((const char*)read_buf) + 1;
      if(validate_cnt < 0) {
        validate_cnt = ret;
      } else {
        validate_cnt++;
        if(validate_cnt > MAX_PACKET_LEN) validate_cnt = 1;
      }

      if(ret != len) {
        pckts_fails++;
        if((ret > (int)(first_failed_packet + PCKT_MARGIN) || (ret < (int)(first_failed_packet - PCKT_MARGIN)))) {
          first_failed_packet = ret;
        }
        last_failed_packet = ret;
      }

      printf("\r\n***Received a packet***\r\n\rReceived string = '%s' (len=%d) \n\r", read_buf, ret); 
      printf("RSSI: %f, LQI: %u\r\n", myspirit.get_last_rssi_dbm(), (unsigned int)myspirit.get_last_sqi());
      printf("Packets failed:\t%d\t(ff=%d, lf=%d)\r\n", pckts_fails, first_failed_packet, last_failed_packet);
      
      while(myspirit.is_receiving()); // wait for ongoing RX ends
    } 
  }
  
  myspirit.off();
  
  return 0;
}