Revision 0:ddc820578cb0, committed 2013-03-20

Comitter:

mlab4

Date:

Wed Mar 20 19:05:36 2013 +0000

Commit message:

Demo code works

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/MRF24J40/MRF24J40.cpp	Wed Mar 20 19:05:36 2013 +0000
@@ -0,0 +1,253 @@
+/* mbed MRF24J40 (IEEE 802.15.4 tranceiver) Library
+ * Copyright (c) 2011 Jeroen Hilgers
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "MRF24J40.h"
+
+// MRF20J40 Short address control register mapping.
+#define RXMCR     0x00
+#define PANIDL    0x01
+#define PANIDH    0x02
+#define SADRL     0x03
+#define SADRH     0x04
+#define EADR0     0x05
+#define EADR1     0x06
+#define EADR2     0x07
+#define EADR3     0x08
+#define EADR4     0x09
+#define EADR5     0x0a
+#define EADR6     0x0b
+#define EADR7     0x0c
+#define RXFLUSH   0x0d
+
+#define TXNMTRIG  0x1b
+#define TXSR      0x24
+
+#define ISRSTS    0x31
+#define INTMSK    0x32
+#define GPIO      0x33
+#define TRISGPIO  0x34
+
+#define RFCTL     0x36
+
+#define BBREG2    0x3A
+
+#define BBREG6    0x3E
+#define RSSITHCCA 0x3F
+
+// MRF20J40 Long address control register mapping.
+#define RFCTRL0   0x200
+
+#define RFCTRL2   0x202
+#define RFCTRL3   0x203
+
+#define RFCTRL6   0x206
+#define RFCTRL7   0x207
+#define RFCTRL8   0x208
+
+#define CLKINTCR  0x211
+#define CLCCTRL   0x220
+
+MRF24J40::MRF24J40(PinName mosi, PinName miso, PinName sck, PinName cs, PinName reset) ://, PinName irq, PinName wake) :
+    mSpi(mosi, miso, sck), // mosi, miso, sclk
+    mCs(cs),
+    mReset(reset)
+//    mIrq(irq),
+//    mWake(wake)
+{
+    mSpi.format(8, 0); // 8 bits, cpol=0; cpha=0
+    mSpi.frequency(500000);
+    Reset();
+}
+
+/*
+void MRF24J40::DebugDump(Serial &ser)
+{
+   ser.printf("MRF24J40 registers:\r");
+   ser.printf("RXMCR=0x%X\r", MrfReadShort(RXMCR));
+   ser.printf("RXFLUSH=0x%X\r", MrfReadShort(RXFLUSH)); 
+   ser.printf("TXNMTRIG=0x%X\r", MrfReadShort(TXNMTRIG));
+   ser.printf("TXSR=0x%X\r", MrfReadShort(TXSR));
+   ser.printf("ISRSTS=0x%X\r", MrfReadShort(ISRSTS)); 
+   ser.printf("INTMSK=0x%X\r", MrfReadShort(INTMSK));
+   ser.printf("GPIO=0x%X\r", MrfReadShort(GPIO));
+   ser.printf("TRISGPIO=0x%X\r", MrfReadShort(TRISGPIO));
+   ser.printf("RFCTL=0x%X\r", MrfReadShort(RFCTL));
+   ser.printf("BBREG2=0x%X\r", MrfReadShort(BBREG2));
+   ser.printf("BBREG6=0x%X\r", MrfReadShort(BBREG6));
+   ser.printf("RSSITHCCA=0x%X\r", MrfReadShort(RSSITHCCA));
+  
+  
+   ser.printf("RFCTRL0=0x%X\r", MrfReadLong(RFCTRL0));
+   ser.printf("RFCTRL2=0x%X\r", MrfReadLong(RFCTRL2));
+   ser.printf("RFCTRL3=0x%X\r", MrfReadLong(RFCTRL3));
+   ser.printf("RFCTRL6=0x%X\r", MrfReadLong(RFCTRL6));
+   ser.printf("RFCTRL7=0x%X\r", MrfReadLong(RFCTRL7));
+   ser.printf("RFCTRL8=0x%X\r", MrfReadLong(RFCTRL8));
+   ser.printf("CLKINTCR=0x%X\r", MrfReadLong(CLKINTCR));
+   ser.printf("CLCCTRL=0x%X\r", MrfReadLong(CLCCTRL));
+   ser.printf("\r");
+}
+*/
+
+void MRF24J40::Reset(void)
+{
+    mCs = 1;
+    // Pulse hardware reset.
+    mReset = 0;
+    wait_us(100);
+    mReset = 1;
+    wait_us(100);
+    
+    // Reset RF module.
+    WriteShort(RFCTL, 0x04);
+    WriteShort(RFCTL, 0x00);
+  
+    WriteShort(RFCTL, 0x00);
+  
+    WriteShort(PANIDL, 0xAA);
+    WriteShort(PANIDH, 0xAA);
+    WriteShort(SADRL, 0xAA);
+    WriteShort(SADRH, 0xAA);
+  
+    // Flush RX fifo.
+    WriteShort(RXFLUSH, 0x01);
+  
+    // Write MAC addresses here. We don't care.
+
+    WriteLong(RFCTRL2, 0x80);  // Enable RF PLL.
+  
+    WriteLong(RFCTRL3, 0x00);  // Full power.
+    WriteLong(RFCTRL6, 0x80);  // Enable TX filter (recommended)
+    WriteLong(RFCTRL8, 0x10);  // Enhanced VCO (recommended)
+      
+    WriteShort(BBREG2,0x78);   // Clear Channel Assesment use carrier sense.
+    WriteShort(BBREG6,0x40);   // Calculate RSSI for Rx packet.
+    WriteShort(RSSITHCCA,0x00);// RSSI threshold for CCA. 
+      
+    WriteLong(RFCTRL0, 0x00);  // Channel 11.
+  
+    WriteShort(RXMCR, 0x01); // Don't check address upon reception.
+//  MrfWriteShort(RXMCR, 0x00); // Check address upon reception.
+  
+    // Reset RF module with new settings.
+    WriteShort(RFCTL, 0x04);
+    WriteShort(RFCTL, 0x00);
+}
+
+void MRF24J40::Send(uint8_t *data, uint8_t length)
+{
+  uint8_t i;
+  
+  WriteLong(0x000, 0);   // No addresses in header.
+  WriteLong(0x001, length); // 11 bytes
+  for(i=0; i<length; i++)
+    WriteLong(0x002+i, data[i]); 
+    
+  WriteShort(TXNMTRIG, 0x01);
+}
+
+uint8_t MRF24J40::Receive(uint8_t *data, uint8_t maxLength)
+{
+  uint8_t i, length;
+  uint8_t lqi, rssi;
+  
+  if(ReadShort(ISRSTS)& 0x08)
+  {
+    length = ReadLong(0x300);
+    lqi = ReadLong(0x301 + length);
+    rssi = ReadLong(0x302 + length);
+    for(i=0; i<length; i++)
+      if(i<maxLength)
+          *data++ = ReadLong(0x301 + (uint16_t)i);
+      else
+          ReadLong(0x301 + (uint16_t)i);
+    if(length < maxLength)
+       return length;          
+  }
+  return 0;
+}
+
+uint8_t MRF24J40::ReadShort (uint8_t address)
+{
+  uint8_t value;
+  mCs = 0;
+  wait_us(1);
+  mSpi.write((address<<1) & 0x7E);
+  wait_us(1);
+  value = mSpi.write(0xFF);
+  wait_us(1);
+  mCs = 1;
+  wait_us(1);
+  return value;
+}
+
+void MRF24J40::WriteShort (uint8_t address, uint8_t data)
+{
+  mCs = 0;
+  wait_us(1);
+  mSpi.write(((address<<1) & 0x7E) | 0x01);
+  wait_us(1);
+  mSpi.write(data);
+  wait_us(1);
+  mCs = 1;
+  wait_us(1);
+}
+
+uint8_t MRF24J40::ReadLong (uint16_t address)
+{
+  uint8_t value;
+  mCs = 0;
+  wait_us(1);
+  mSpi.write((address>>3) | 0x80);
+  wait_us(1);
+  mSpi.write((address<<5) & 0xE0);
+  wait_us(1);
+  value = mSpi.write(0xFF);
+  wait_us(1);
+  mCs = 1;
+  wait_us(1);
+  return value;
+}
+
+void MRF24J40::WriteLong (uint16_t address, uint8_t data)
+{
+  mCs = 0;
+  wait_us(1);
+  mSpi.write((address>>3) | 0x80);
+  wait_us(1);
+  mSpi.write(((address<<5) & 0xE0) | 0x10);
+  wait_us(1);
+  mSpi.write(data);
+  wait_us(1);
+  mCs = 1;
+  wait_us(1);
+}
+
+void MRF24J40::SetChannel(uint8_t channel)
+{ 
+    WriteLong(RFCTRL0, (channel & 0x0F)<<4 | 0x03); // Set channel, leave RFOPT bits at recommended
+    
+    //Reset the board by first writing a 4 to RFCTL, then writing a 0
+    WriteShort(RFCTL, 0x04);
+    WriteShort(RFCTL, 0x00);
+    wait(0.5);
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/MRF24J40/MRF24J40.h	Wed Mar 20 19:05:36 2013 +0000
@@ -0,0 +1,167 @@
+/* mbed MRF24J40 (IEEE 802.15.4 tranceiver) Library
+ * Copyright (c) 2011 Jeroen Hilgers
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+  
+#ifndef MRF24J40_H
+#define MRF25J40_H
+
+#include "mbed.h"
+
+/** MRF24J40 class. Provides a simple send/receive API for a microchip
+ ** MFR24J40 IEEE 802.15.4 tranceiver. The tranceiver is available on a 
+ ** module that can easilly be soldered to some header pins to use it with
+ ** an mbed on a breadboard. The module is called 'MRF24J40MA' and can be 
+ ** ordered for example by www.farnell.com.
+ *
+ * Example:
+ * @code
+ * #include "mbed.h"
+ * #include "MRF24J40.h"
+ * 
+ * // RF tranceiver to link with handheld.
+ * MRF24J40 mrf(p11, p12, p13, p14, p21);
+ * 
+ * // LEDs
+ * DigitalOut led1(LED1);
+ * DigitalOut led2(LED2);
+ * DigitalOut led3(LED3);
+ * DigitalOut led4(LED4);
+ * 
+ * // Timer.
+ * Timer timer;
+ * 
+ * // Serial port for showing RX data.
+ * Serial pc(USBTX, USBRX); 
+ * 
+ * // Send / receive buffers.
+ * // IMPORTANT: The MRF24J40 is intended as zigbee tranceiver; it tends
+ * // to reject data that doesn't have the right header. So the first 
+ * // 8 bytes in txBuffer look like a valid header. The remaining 120
+ * // bytes can be used for anything you like.
+ * uint8_t txBuffer[128]= {1, 8, 0, 0xA1, 0xB2, 0xC3, 0xD4, 0x00};
+ * 
+ * uint8_t rxBuffer[128];
+ * uint8_t rxLen;
+ * 
+ * int main (void)
+ * {
+ *     uint8_t count = 0;
+ *     pc.baud(115200);
+ *     timer.start();
+ *     while(1)
+ *     {
+ *         // Check if any data was received. 
+ *         rxLen = mrf.Receive(rxBuffer, 128);
+ *         if(rxLen) 
+ *         {
+ *             // Toggle LED 1 upon each reception of data.
+ *             led1 = led1^1;
+ *             // Send to serial.
+ *             // IMPORTANT: The last two bytes of the received data
+ *             // are the checksum used in the transmission. 
+ *             for(uint8_t i=0; i<rxLen; i++)
+ *             {
+ *                 pc.printf("0x%02X ", rxBuffer[i]);
+ *             }
+ *             pc.printf("\r\n");
+ *         }
+ *         
+ *         // Each second, send some data.
+ *         if(timer.read_ms() >= 1000) 
+ *         {
+ *             timer.reset();
+ *             // Toggle LED 2.
+ *             led2 = led2^1;
+ *             
+ *             // UART.
+ *             pc.printf("TXD\r\n");
+ *             
+ *             // Send counter value.
+ *             count++;
+ *             txBuffer[8] = count;
+ *             mrf.Send(txBuffer, 9);
+ *         }
+ *     }
+ * }
+ * @endcode
+ */
+
+
+class MRF24J40
+{
+  public:
+    /** Create a MRF24J40 object and initizalize it.
+     *
+     * @param pin mosi Spi MOSI pin connected to MRF's SDI.
+     * @param pin miso Spi MISO pin connected to MRF's SDO.
+     * @param pin sck  Spi SCK pin connected to MRF's SCK.
+     * @param pin cs Pin connected to MRF's #CS.
+     * @param pin reset Pin connected to MRF's #Reset.
+     */
+    MRF24J40(PinName mosi, PinName miso, PinName sck, PinName cs, PinName reset);//, PinName irq, PinName wake);
+    
+    /** Reset the MRF24J40 and initialize it.
+     */
+    void Reset(void);                             // Reset chip and configure it.
+    
+    /** Send data.
+     *
+     * Note that the MRF24J40 only handles data with a valid IEEE 802.15.4
+     * header. See the example how to get around this.
+     *
+     * @param data Pointer to data to be send.
+     * @param length Length of the data to be send in bytes.
+     */
+    void Send(uint8_t *data, uint8_t length);         // Send data.
+
+    /** Check if any data was received.
+     *
+     * Note that the MRF24J40 appends two bytes of CRC for each packet.
+     * So you will receive two bytes more than were send with the 'Send' function.
+     *
+     * @param data Pointer to buffer where received data can be placed.
+     * @param maxLength Maximum amount of data to be placed in the buffer.
+     * @param returns The number of bytes written into the buffer.
+     */
+    uint8_t Receive(uint8_t *data, uint8_t maxLength);  // Receive data if ready.
+    
+     /** Sets the channel of the MRF24J40
+     *
+     * @param channel A number between 0-15 (0=2405MHz 15=2480MHz) 
+     */
+    void SetChannel(uint8_t channel);
+    
+    // void DebugDump(Serial &ser);
+
+  private:
+    SPI mSpi;
+    DigitalOut mCs;
+    DigitalOut mReset;
+    // DigitalIn mIrq;
+    // DigitalIn mWake;
+
+    uint8_t ReadShort (uint8_t address);
+    void WriteShort (uint8_t address, uint8_t data);
+    uint8_t ReadLong (uint16_t address);
+    void WriteLong (uint16_t address, uint8_t data);
+};
+
+#endif
\ No newline at end of file

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WhackAMole.cpp	Wed Mar 20 19:05:36 2013 +0000
@@ -0,0 +1,113 @@
+#include "mbed.h"
+#include "MRF24J40.h"
+
+#include <string>
+
+// RF tranceiver to link with handheld.
+MRF24J40 mrf(p11, p12, p13, p14, p21);
+
+// LEDs you can treat these as variables (led2 = 1 will turn led2 on!)
+DigitalOut led1(LED1);
+DigitalOut led2(LED2);
+DigitalOut led3(LED3);
+DigitalOut led4(LED4);
+
+// Timer
+Timer timer;
+
+// Serial port for showing RX data.
+Serial pc(USBTX, USBRX);
+
+// Used for sending and receiving
+char txBuffer[128];
+char rxBuffer[128];
+int rxLen;
+
+//***************** Do not change these methods (please) *****************//
+
+/**
+* Receive data from the MRF24J40.
+*
+* @param data A pointer to a char array to hold the data
+* @param maxLength The max amount of data to read.
+*/
+int rf_receive(char *data, uint8_t maxLength)
+{
+    uint8_t len = mrf.Receive((uint8_t *)data, maxLength);
+    uint8_t header[8]= {1, 8, 0, 0xA1, 0xB2, 0xC3, 0xD4, 0x00};
+
+    if(len > 10) {
+        //Remove the header and footer of the message
+        for(uint8_t i = 0; i < len-2; i++) {
+            if(i<8) {
+                //Make sure our header is valid first
+                if(data[i] != header[i])
+                    return 0;
+            } else {
+                data[i-8] = data[i];
+            }
+        }
+
+        //pc.printf("Received: %s length:%d\r\n", data, ((int)len)-10);
+    }
+    return ((int)len)-10;
+}
+
+/**
+* Send data to another MRF24J40.
+*
+* @param data The string to send
+* @param maxLength The length of the data to send.
+*                  If you are sending a null-terminated string you can pass strlen(data)+1
+*/
+void rf_send(char *data, uint8_t len)
+{
+    //We need to prepend the message with a valid ZigBee header
+    uint8_t header[8]= {1, 8, 0, 0xA1, 0xB2, 0xC3, 0xD4, 0x00};
+    uint8_t *send_buf = (uint8_t *) malloc( sizeof(uint8_t) * (len+8) );
+
+    for(uint8_t i = 0; i < len+8; i++) {
+        //prepend the 8-byte header
+        send_buf[i] = (i<8) ? header[i] : data[i-8];
+    }
+    //pc.printf("Sent: %s\r\n", send_buf+8);
+
+    mrf.Send(send_buf, len+8);
+    free(send_buf);
+}
+
+
+//***************** You can start coding here *****************//
+int main (void)
+{
+    uint8_t channel = 2;
+
+    //Set the Channel. 0 is default, 15 is max
+    mrf.SetChannel(channel);
+
+    //Start the timer
+    timer.start();
+
+    while(true) {
+        //Try to receive some data
+        rxLen = rf_receive(rxBuffer, 128);
+        if(rxLen > 0) {
+            //Toggle the Led
+            led1 = led1^1;
+            pc.printf("Received: %s\r\n", rxBuffer);
+        }
+        
+        //Send some data every second
+        if(timer.read_ms() >= 1000) {
+            //Reset the timer to 0
+            timer.reset();
+            // Toggle LED 2.
+            led2 = led2^1;
+            //Add to the buffer. You may want to check out sprintf
+            strcpy(txBuffer, "Jeff is the best TA!");
+            //Send the buffer
+            rf_send(txBuffer, strlen(txBuffer) + 1);
+            pc.printf("Sent: %s\r\n", txBuffer);
+        }
+    }
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Wed Mar 20 19:05:36 2013 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed/builds/5e5da4a5990b
\ No newline at end of file