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Diff: MRF24J40/MRF24J40.h
- Revision:
- 0:ddc820578cb0
--- /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