Diff: MRF24J40.cpp

Revision:

0:0630ffe718d3

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/MRF24J40.cpp	Wed Feb 16 07:50:54 2011 +0000
@@ -0,0 +1,243 @@
+/* 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);
+}