Diff: main.cpp

Revision:

0:b709611436a1

diff -r 000000000000 -r b709611436a1 main.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Fri Dec 16 20:37:06 2016 +0000
@@ -0,0 +1,169 @@
+/* FXOS8700Q Example Program
+ * Copyright (c) 2014-2015 ARM Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "mbed.h"
+#include "FXOS8700Q.h"
+#include "nRF24L01P.h"
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+/*Pin Declarations*/
+Serial pc(USBTX, USBRX);
+I2C i2c(PTE25, PTE24);
+FXOS8700QAccelerometer acc(i2c, FXOS8700CQ_SLAVE_ADDR1);    // Configured for the FRDM-K64F with onboard sensors
+DigitalIn sw3(SW3); //Enable button for sending data
+
+/*RF Module Instantiations*/
+nRF24L01P my_nrf24l01p (PTD6,PTD7,PTD5,PTD4,PTB20,PTC18); // mosi, miso, sck, csn, ce, irq
+
+DigitalOut myled1(LED1);
+DigitalOut myled2(LED2);
+
+/*Function Prototypes*/
+void packetize(int16_t raX, int16_t raY, int16_t raZ, char* buffer);
+
+int main(void)
+{
+    
+#define TRANSFER_SIZE   15
+
+    int16_t raX, raY, raZ;
+    
+    char buffer[TRANSFER_SIZE];/*first char is sign, the rest are ints*/
+    
+    my_nrf24l01p.powerUp();
+     
+    // Display the (default) setup of the nRF24L01+ chip
+    pc.printf( "nRF24L01+ Frequency    : %d MHz\r\n",  my_nrf24l01p.getRfFrequency() );
+    pc.printf( "nRF24L01+ Output power : %d dBm\r\n",  my_nrf24l01p.getRfOutputPower() );
+    pc.printf( "nRF24L01+ Data Rate    : %d kbps\r\n", my_nrf24l01p.getAirDataRate() );
+    pc.printf( "nRF24L01+ TX Address   : 0x%010llX\r\n", my_nrf24l01p.getTxAddress() );
+    pc.printf( "nRF24L01+ RX Address   : 0x%010llX\r\n", my_nrf24l01p.getRxAddress() );
+
+    /*setting intializations and enable of RF module*/
+    my_nrf24l01p.setTransferSize( TRANSFER_SIZE );
+    my_nrf24l01p.setReceiveMode();
+    my_nrf24l01p.enable();
+    
+    /*enable accelerometer*/
+    acc.enable();
+
+    
+    while (true) {
+        
+        /* get accelerometer data*/
+        acc.getX(raX);
+        acc.getY(raY);
+        acc.getZ(raZ);
+                
+        /*print data to terminal*/
+        printf("ACC: X=%d Y=%d Z=%d \r\n", raX, raY, raZ);
+    
+        /*packetize data to be sent*/
+        packetize(raX,raY,raZ,buffer); 
+        
+        
+        if(!sw3){/*only send data via RF module when sw2 button is held*/
+            
+            /* Send the transmit buffer via the RF module*/
+            my_nrf24l01p.write( NRF24L01P_PIPE_P0, buffer, TRANSFER_SIZE );
+         
+            pc.printf( "\n\rData has been sent!\n\r");
+
+        }/*end if*/
+        
+        // Toggle LED1 (to help debug Host -> nRF24L01+ communication)
+        myled1 = !myled1;
+            
+        wait(1);
+        
+    }/*end while*/
+}/*end main*/
+
+void packetize(int16_t raX, int16_t raY, int16_t raZ, char* buffer){
+/*Packetize is called upon when a char buffer should be loaded to send
+data via RF module. In this particular instance the char buffer "buffer"
+holds three signed - four digit numbers, therefore the sign of each of the
+three numbers are determined first and loaded to it's corresponding index 
+in buffer. Then, the Thousands, Hundreds, Tens and Ones digits are converted 
+to ASCII chars by adding the hex ASCII value of 0 to the corresponding digit.*/
+    
+    
+    /*determine sign char for raX,raY,raZ*/ 
+        if(raX >= 0){ 
+        
+            buffer[0] = ' ';
+        }
+        else{/*raX is negative*/
+            
+            buffer[0] = '-';
+            
+            raX = raX * (-1);/*get the absolute value of raX*/
+            
+        }
+        if(raY >= 0){ /*determine sign char*/
+        
+            buffer[5] = ' ';
+        }
+        else{/*raY is negative*/
+            
+            buffer[5] = '-';
+            
+            raY = raY * (-1);/*get the absolute value of raY*/
+            
+        }
+        if(raZ >= 0){ /*determine sign char*/
+        
+            buffer[10] = ' ';
+        }
+        else{/*raZ is negative*/
+            
+            buffer[10] = '-';
+            
+            raZ = raZ * (-1);/*get the absolute value of raZ*/
+            
+        }
+        
+        /*int to string for raX,raY,raZ*/
+        /*raX*/
+        buffer[1] = (raX/1000)+'0'; /*thousands char*/
+        raX = raX % 1000;
+        buffer[2] = (raX/100) + '0';/*hundreds char*/
+        raX = raX % 100;
+        buffer[3] = (raX/10) + '0'; /*tens char*/
+        raX = raX % 10;
+        buffer[4] = raX + '0';      /*ones char*/
+        
+        /*raY*/
+        buffer[6] = (raY/1000)+'0'; /*thousands char*/
+        raY = raY % 1000;
+        buffer[7] = (raY/100) + '0';/*hundreds char*/
+        raY = raY % 100;
+        buffer[8] = (raY/10) + '0'; /*tens char*/
+        raY = raY % 10;
+        buffer[9] = raY + '0';      /*ones char*/
+        
+        /*raZ*/
+        buffer[11] = (raZ/1000)+'0'; /*thousands char*/
+        raZ = raZ % 1000;
+        buffer[12] = (raZ/100) + '0';/*hundreds char*/
+        raZ = raZ % 100;
+        buffer[13] = (raZ/10) + '0'; /*tens char*/
+        raZ = raZ % 10;
+        buffer[14] = raZ + '0';      /*ones char*/
+        
+}/*end packetize()*/
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