main.cpp

00001 /**
00002 
00003  Wireless Door Bell based on SPIRIT1 & NUCLEO boards
00004  RX RX RX
00005  
00006  Date:  Jan 2018
00007  Version: 1.0
00008  More info are here: 
00009  http://www.emcu.eu/wireless-doorbell-based-on-spirit1-nucleo-boards/
00010 
00011  ******************************************************************************
00012  * @file    main.cpp
00013  * @author  Rosarium PILA, STMicroelectronics
00014  * @version V1.0.0
00015  * @date    June 19th, 2017
00016  * @brief   mbed test application for the STMicroelectronics X-NUCLEO-IDB01A4/5
00017  *          Spirit1 Expansion Board
00018  ******************************************************************************
00019  * @attention
00020  *
00021  * <h2><center>&copy; COPYRIGHT(c) 2017 STMicroelectronics</center></h2>
00022  *
00023  * Redistribution and use in source and binary forms, with or without modification,
00024  * are permitted provided that the following conditions are met:
00025  *   1. Redistributions of source code must retain the above copyright notice,
00026  *      this list of conditions and the following disclaimer.
00027  *   2. Redistributions in binary form must reproduce the above copyright notice,
00028  *      this list of conditions and the following disclaimer in the documentation
00029  *      and/or other materials provided with the distribution.
00030  *   3. Neither the name of STMicroelectronics nor the names of its contributors
00031  *      may be used to endorse or promote products derived from this software
00032  *      without specific prior written permission.
00033  *
00034  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
00035  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
00036  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
00037  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
00038  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
00039  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
00040  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
00041  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
00042  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
00043  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00044  *
00045  ******************************************************************************
00046  */
00047 
00048 #include "mbed.h"
00049 #include "SimpleSpirit1.h"
00050 
00051 #include <stdio.h>
00052 #include <string.h>
00053 
00054 #define TEST_STR_LEN (32) 
00055 static char 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'};
00056 static char 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'};
00057           
00058 static SimpleSpirit1 &myspirit = SimpleSpirit1::CreateInstance(D11, D12, D3, D9, D10, D2); /* (SPI_CLK) = (D13:PA5:resistorR7 --> D3:PB3:resistorR4)*/
00059 
00060 static volatile bool rx_done_flag = false; 
00061 static volatile bool tx_done_flag = false; 
00062 static volatile bool send_data_flag = false;
00063 
00064 static DigitalOut TestLED(D5);         /* LED of IDS01A4/5 */
00065 static InterruptIn event(USER_BUTTON); /* Interrupt event to give userinterface to send pkt. */
00066 
00067 /**
00068  * @brief  callback_func
00069  * @param  callback event
00070  * @retval None.
00071  */
00072 static void callback_func(int event) 
00073 {
00074   if(event == SimpleSpirit1::RX_DONE) 
00075   {              
00076     rx_done_flag = 1;
00077   }
00078   else if (event == SimpleSpirit1::TX_DONE) 
00079   {
00080     tx_done_flag = 1;
00081   }
00082 }
00083 
00084 /**
00085  * @brief  set_send_data_flag
00086  * @param  None
00087  * @retval None
00088  */
00089 static void set_send_data_flag(void)
00090 {  
00091   send_data_flag = 1 ;
00092 }
00093 
00094 /**
00095  * @brief  send_data
00096  * @param  None
00097  * @retval None
00098  */
00099 static void send_data(void)
00100 {
00101   printf("\r\n***Sending a packet***");  
00102   
00103   while(myspirit.is_receiving()); /* wait for ongoing RX ends */
00104  
00105   size_t curr_len = strlen((const char*)send_buf) + 1;
00106   myspirit.send(send_buf, curr_len);
00107 }
00108 
00109 /**
00110  * @brief  read_rcvd_data
00111  * @param  None
00112  * @retval None
00113  */
00114 static void read_rcvd_data(void)
00115 {  
00116  
00117   for(unsigned int flush_count = 0; flush_count < TEST_STR_LEN; flush_count++) read_buf[flush_count] = 0 ;/* clear the read buffer */
00118       
00119       int ret = myspirit.read(read_buf, sizeof(read_buf));
00120       
00121       if(ret == 0) 
00122       {
00123         printf("\nNothing to read\n\r");
00124         return;
00125       }
00126       printf("\r\n***Received a packet***\r\n\rReceived string = '%s' (len=%d) \n\r", read_buf, ret); 
00127       
00128       wait_ms(100);
00129 }
00130 
00131 
00132 /**
00133  * @brief  main routine
00134  * @param  None
00135  * @retval int
00136  */
00137 int main() 
00138 {  
00139   TestLED = 0;                  /* LED off */
00140   
00141   myspirit.attach_irq_callback(callback_func);
00142   
00143   myspirit.on();
00144   
00145   printf("\n\r************** RX (X-NUCLEO-IDS01A4/5) **************\r\n");
00146   printf("Receive a strinbg and back it to Tx\n\r\n\n");
00147   
00148   event.rise(&set_send_data_flag); /*User button interrupt trigger to set send data flag */
00149   
00150   while(1) 
00151   {
00152     __WFE(); /* low power in idle condition., waiting for an event */
00153     
00154     if(rx_done_flag) 
00155     {
00156       rx_done_flag = false; 
00157       read_rcvd_data();
00158       
00159       if(strcmp(send_buf,read_buf) == 0)
00160       {
00161         printf("RxTx OK \n\r");
00162         TestLED = !TestLED;     /* Toggle LED at the receiver */
00163       }
00164       else
00165         printf("RxTx FAIL \n\r");
00166       
00167       wait_ms(100);
00168       send_data_flag = false;
00169       send_data();                
00170     }
00171     
00172     else if (tx_done_flag)
00173     {
00174       tx_done_flag = false;
00175       printf("\r\n***Packet sent ***\r\nSent string ='%s' (len=%d)\n\r", send_buf, strlen((const char*)send_buf) + 1);
00176     }
00177     
00178     // Read the red LED status
00179     if(TestLED == 1)
00180     {
00181         int n=0;
00182         for(n=0; n<=6; n++)
00183         {
00184             wait_ms(500);
00185             TestLED = 0;
00186             wait_ms(150);
00187             TestLED = 1;
00188         }       
00189         for(n=0; n<=12; n++)
00190         {
00191             wait_ms(250);
00192             TestLED = 0;
00193             wait_ms(100);
00194             TestLED = 1;
00195         }                 
00196         for(n=0; n<=18; n++)
00197         {
00198             wait_ms(150);
00199             TestLED = 0;
00200             wait_ms(70);
00201             TestLED = 1;
00202         }         
00203     TestLED = 0;
00204     }    
00205   }
00206   
00207   /* unreachable */
00208   // myspirit.off();
00209   // return 0;
00210 }