Robbie King / DMX

This is a fork for okini3939's great DMX library with added support for the EA LPC4088 QuickStart mbed-enabled board. I have added support and tested the 3 UARTs which are accessible on the DIP pins. This forked of okini3939's library was created in the hopes a pull request could be accepted and re-integrated into the library. Important Note: To use the special UART on "pins 41" (rx) and "pin 42" (tx) you must access them by their port names, which are P0_3 (rx) and P0_2 (tx), because the symbols p41 and p42 do not exist in the mbed world (yet).

Fork of DMX by Suga koubou

DMX.h

Committer:
robodude
Date:
2013-12-02
Revision:
13:197c0fea0c62
Parent:
12:1f176eee2d28

File content as of revision 13:197c0fea0c62:

/*
 * DMX512 send/recv library
 * Copyright (c) 2013 Hiroshi Suga
 * Released under the MIT License: http://mbed.org/license/mit
 */

/** @file
 * @brief DMX512 send/recv
 */
 
#ifndef DMX_H
#define DMX_H

#include "mbed.h"

#define DMX_UART_DIRECT

#define DMX_SIZE 512
#define DMX_TIME_BREAK 100 // 100us (88us-1s)
#define DMX_TIME_MAB 10 // 10us (8us-1s)
#define DMX_TIME_BETWEEN 10 // 10us (0-1s)
#define DMX_START_CODE 0

enum DMX_MODE {
    DMX_MODE_BEGIN,
    DMX_MODE_START,
    DMX_MODE_BREAK,
    DMX_MODE_MAB,
    DMX_MODE_DATA,
    DMX_MODE_ERROR,
    DMX_MODE_STOP,
};

/** DMX512 class (sender/client)
 */
class DMX {
public:
    /** init DMX class
     * @param p_tx TX serial port (p9, p13, p28)
     * @param p_rx RX serial port (p10, p14, p27)
     */
    DMX (PinName p_tx, PinName p_rx); 

    /** Send the data
     * @param addr DMX data address (0-511)
     * @param data DMX data (0-255)
     */
    void put (int addr, int data);
    /** Send the data
     * @param buf DMX data buffer
     * @param addr DMX data address
     * @param len data length
     */
    void put (unsigned char *buf, int addr = 0, int len = DMX_SIZE);

    /** Send the data
     * @param addr DMX data address (0-511)
     * @return DMX data (0-255)
     */
    int get (int addr);
    /** Send the data
     * @param buf DMX data buffer
     * @param addr DMX data address
     * @param len data length
     */
    void get (unsigned char *buf, int addr = 0, int len = DMX_SIZE);

    /** Start DMX send operation
     */
    void start ();
    /** Stop DMX send operation
     */
    void stop ();
    /** Clear DMX data
     */
    void clear ();

    volatile int is_recived, is_sent;

protected:

    void int_timer ();
    void int_tx ();
    void int_rx ();

    Serial _dmx;
    Timeout timeout01;
    volatile DMX_MODE mode_tx, mode_rx;
    volatile int addr_tx, addr_rx;
    unsigned char data_tx[DMX_SIZE];
    unsigned char data_rx[DMX_SIZE];

private:
#if defined(TARGET_LPC1768) || defined(TARGET_LPC2368) || defined(TARGET_LPC4088)
    LPC_UART_TypeDef *_uart;
#elif defined(TARGET_LPC11U24)
    LPC_USART_Type *_uart;
#elif defined(TARGET_LPC11XX)
    LPC_UART_TypeDef *_uart;
#endif

};

#endif