Diff: main.cpp

Revision:

0:9df942ea84f4

Child:

2:0e79d58be0f6

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Sun Nov 21 11:37:56 2010 +0000
@@ -0,0 +1,98 @@
+#include "mbed.h"
+#include "CC1101.h"
+#include "RingBuffer.h"
+ 
+///////////////////////////////////////////////////
+Ticker timer;
+CC1101 cc1101(p5, p6, p7, p8, p10);
+DigitalIn gdo0(p9);     // pin connected to gdo0 pin of CC1101 for checking that received a new packet
+
+DigitalOut led1(LED1);  // timer blink led
+DigitalOut led2(LED2);  // RX led
+DigitalOut led3(LED3);  // TX led
+Serial pc(USBTX, USBRX); // tx, rx
+RingBuffer pcRX(512);   // ring buffer for the pc RX data
+RingBuffer pcTX(512);   // ring buffer for the pc TX data
+Timeout pcRXtimeout;
+Timeout led2timeout;
+Timeout led3timeout;
+unsigned char buffer[128];
+///////////////////////////////////////////////////
+void led2timeout_func()
+{
+    led2 = 0;
+    led2timeout.detach();
+}
+///////////////////////////////////////////////////
+void led3timeout_func()
+{
+    led3 = 0;
+    led3timeout.detach();
+}
+///////////////////////////////////////////////////
+void pcRXtimeout_func()         // function for transmiting the RF packets - empty the pcRX ring buffer
+{
+    unsigned char txlength;
+    
+    txlength = 0;
+    while(pcRX.use() > 0)
+    {
+      led2 = 1;
+      buffer[txlength] = pcRX.getc();
+      txlength++;
+      led2timeout.attach(&led2timeout_func, 0.050);  // for switch off the led
+    }
+    if (txlength)
+      cc1101.SendPacket(buffer, txlength);    // tx packet
+    
+    pcRXtimeout.detach();
+}
+///////////////////////////////////////////////////
+void timer_func()           // check the status of the CC1101 every 100ms
+{    
+    unsigned char chip_status_rx, chip_status_tx;
+    
+    led1 = !led1;
+    chip_status_rx = cc1101.ReadChipStatusRX();  // check the rx status 
+    if ((chip_status_rx & CHIP_STATE_MASK) == CHIP_STATE_RXFIFO_OVERFLOW)   // if rx overflow flush the rx fifo
+      cc1101.FlushRX();  
+    if ((chip_status_rx & CHIP_STATE_MASK) == CHIP_STATE_IDLE)              // if state is idle go to rx state again
+      cc1101.RXMode();  
+    chip_status_tx = cc1101.ReadChipStatusTX();  // check the tx sttus
+    if ((chip_status_tx & CHIP_STATE_MASK) == CHIP_STATE_TXFIFO_UNDERFLOW)  // if tx underflow flush the tx fifo
+      cc1101.FlushTX();
+}
+///////////////////////////////////////////////////
+int main() 
+{
+    unsigned char rxlength, i;
+    
+    pcRX.clear();
+    pcTX.clear();
+    cc1101.init();
+    timer.attach(&timer_func, 0.1);
+    while(1)
+    {
+        if(gdo0)      // rx finished and CRC OK read the new packet
+        {
+            rxlength = sizeof(buffer);
+            if (cc1101.ReceivePacket(buffer, &rxlength) == 1)   // read the rx packet
+            {
+                led3 = 1;
+                for (i = 0; i < rxlength; i++)
+                    pcTX.putc(buffer[i]);                       // store the packet to the pcTX ring buffer 
+                led3timeout.attach(&led3timeout_func, 0.050);   // for switch off the led
+            }
+        }
+        if (pcTX.use() > 0)         // check if we have data to transmit to pc
+            pc.putc(pcTX.getc());   // get the data from the ring buffer and transmit it to the pc
+        if (pc.readable())          // check if we received new data from the pc
+        {
+            pcRX.putc(pc.getc());   // put the data to the pcRX buffer and wait until 20ms passed till the last byte before tx the packet in RF
+            pcRXtimeout.attach(&pcRXtimeout_func, 0.020);
+        }
+        if (pcRX.use() > 20)        // if more than 20 bytes received then tx the packet in RF
+            pcRXtimeout_func();
+    }     
+}
+///////////////////////////////////////////////////