Revision 4:458f974bb580, committed 2017-10-26

Comitter:

zhangyx

Date:

Thu Oct 26 08:48:54 2017 +0000

Parent:

3:61afd8d17063

Commit message:

set transfer length to 1

Changed in this revision

diff -r 61afd8d17063 -r 458f974bb580 main.cpp
--- a/main.cpp	Wed Oct 11 06:29:40 2017 +0000
+++ b/main.cpp	Thu Oct 26 08:48:54 2017 +0000
@@ -6,22 +6,11 @@
 //                 mosi, miso, sck, csn, ce, irq
 nRF24L01P my_nrf24l01p(D4, D5, D3, D7, D8, D6);
 
-DigitalOut myled1(LED1);
-DigitalOut myled2(LED2);
-
-int main() {
-    
-    pc.printf("init\r\n");
+// The nRF24L01+ supports transfers from 1 to 32 bytes
+#define TRANSFER_SIZE   1
 
-// The nRF24L01+ supports transfers from 1 to 32 bytes, but Sparkfun's
-//  "Nordic Serial Interface Board" (http://www.sparkfun.com/products/9019)
-//  only handles 4 byte transfers in the ATMega code.
-#define TRANSFER_SIZE   4
-
-    char txData[TRANSFER_SIZE], rxData[TRANSFER_SIZE];
-    int txDataCnt = 0;
-    int rxDataCnt = 0;
-
+void initNrf24L01()
+{
     my_nrf24l01p.powerUp();
 
     // Display the (default) setup of the nRF24L01+ chip
@@ -37,42 +26,21 @@
 
     my_nrf24l01p.setReceiveMode();
     my_nrf24l01p.enable();
-
+}
+int main() {
+    char data[TRANSFER_SIZE];
+    initNrf24L01();
     while (1) {
-
-        // If we've received anything over the host serial link...
-        if ( pc.readable() ) {
-
-            // ...add it to the transmit buffer
-            txData[txDataCnt++] = pc.getc();
-
-            // If the transmit buffer is full
-            if ( txDataCnt >= sizeof( txData ) ) {
-
-                // Send the transmitbuffer via the nRF24L01+
-                my_nrf24l01p.write( NRF24L01P_PIPE_P0, txData, txDataCnt );
-
-                txDataCnt = 0;
-            }
-
-            // Toggle LED1 (to help debug Host -> nRF24L01+ communication)
-            myled1 = !myled1;
-        }
-
         // If we've received anything in the nRF24L01+...
         if ( my_nrf24l01p.readable() ) {
-
             // ...read the data into the receive buffer
-            rxDataCnt = my_nrf24l01p.read( NRF24L01P_PIPE_P0, rxData, sizeof( rxData ) );
-
-            // Display the receive buffer contents via the host serial link
-            for ( int i = 0; rxDataCnt > 0; rxDataCnt--, i++ ) {
-
-                pc.putc( rxData[i] );
-            }
-
-            // Toggle LED2 (to help debug nRF24L01+ -> Host communication)
-            myled2 = !myled2;
+            my_nrf24l01p.read( NRF24L01P_PIPE_P0, data, TRANSFER_SIZE);
+            pc.putc(data[0]);
+        }
+        if ( pc.readable() ) {
+            data[0] = pc.getc();
+            // Send the transmitbuffer via the nRF24L01+
+            my_nrf24l01p.write( NRF24L01P_PIPE_P0, data, TRANSFER_SIZE );
         }
     }
 }