File content as of revision 1:ce081666d225:

#include "Dynamixel.h"
#include "mbed.h"

Serial pc(USBTX, USBRX);

Dynamixel::Dynamixel(PinName tx, PinName rx, PinName txEnable, uint8_t motorID, int baudrate) :  m_link(tx, rx), m_txEnable(txEnable), m_motorID(motorID), m_baudrate(baudrate)
{
    m_link.baud(m_baudrate);
}

uint8_t Dynamixel::ping()
{
    uint8_t elements = 6;
    uint8_t instructionBuffer[elements];
    uint8_t statusBuffer[STATUS_PACKET_LENGTH];
    
    if (m_link.writeable() ) {
        instructionBuffer[0] = 0xff;
        instructionBuffer[1] = 0xff;
        instructionBuffer[2] = m_motorID;    // ID
        instructionBuffer[3] = 0x02;         // Length
        instructionBuffer[4] = PING;         // Instruction
        instructionBuffer[5] = ~(instructionBuffer[2] + instructionBuffer[3] + instructionBuffer[4]) & 0xFF;   // Check sum

        m_txEnable = 1;     // Enable Tx / Disable Rx
        for (int i = 0; i<= elements; i++) {
            m_link.putc(instructionBuffer[i]);
        }
        wait_ms(1);         // fix this!!!
        m_txEnable = 0;     // Disable Tx / Enable Rx
    } else {
        pc.printf("Dynamixel not writeable\n");
    }
    wait_ms(10);            // fix this!!!
    if ( m_link.readable() && m_motorID != BROADCAST_ID ) {
        for (int i = 0; i<= STATUS_PACKET_LENGTH; i++) {
            statusBuffer[i] = m_link.getc();    // Read status packet
        }
    }
    return statusBuffer[4]; // Return error
}

uint8_t Dynamixel::toggleLED(uint8_t ledState)
{
    uint8_t elements = 8;
    uint8_t instructionBuffer[elements];
    uint8_t statusBuffer[STATUS_PACKET_LENGTH];
    
    if (m_link.writeable() ) {
        instructionBuffer[0] = 0xff;
        instructionBuffer[1] = 0xff;
        instructionBuffer[2] = m_motorID;    // ID
        instructionBuffer[3] = 0x04;         // Length
        instructionBuffer[4] = WRITE_DATA;   // Instruction
        instructionBuffer[5] = ADDRESS_LED;  // Parameter 1: Starting address
        instructionBuffer[6] = ledState;     // Parameter 2: First value to be writen
        instructionBuffer[7] = ~(instructionBuffer[2] + instructionBuffer[3] + instructionBuffer[4] + instructionBuffer[5] + instructionBuffer[6]) & 0xFF;   // Check sum

        m_txEnable = 1;       // Enable Tx / Disable Rx
        for (int i = 0; i<= elements; i++) {
            m_link.putc(instructionBuffer[i]);
        }
        wait_ms(2);         // fix this!!!
        m_txEnable = 0;       // Disable Tx / Enable Rx
    } else {
        //pc.printf("Dynamixel not writeable\n");
    }
    wait_ms(10);
    if ( m_link.readable() && m_motorID != BROADCAST_ID ) {
        for (int i = 0; i<= STATUS_PACKET_LENGTH; i++) {
            statusBuffer[i] = m_link.getc();    // Read status packet
        }
    }
    return statusBuffer[4]; // Return error
}

uint8_t Dynamixel::move(uint16_t position)
{
    // 0 to 1023 (0x3FF)
    uint8_t elements = 9;
    uint8_t instructionBuffer[elements];
    uint8_t statusBuffer[STATUS_PACKET_LENGTH];
    
    uint16_t checkSum = 0;
    if (m_link.writeable() ) {
        instructionBuffer[0] = 0xff;
        instructionBuffer[1] = 0xff;
        instructionBuffer[2] = m_motorID;                    // ID
        instructionBuffer[3] = 0x05;                         // Length
        instructionBuffer[4] = WRITE_DATA;                   // Instruction
        instructionBuffer[5] = ADDRESS_GOAL_POSITION;        // Parameter 1: Starting address
        instructionBuffer[6] = (uint8_t) position & 0xff;    // Parameter 2: First value to be writen
        instructionBuffer[7] = (uint8_t) (position >> 8);    // Parameter 3: Second value to be writen
        checkSum = instructionBuffer[2] + instructionBuffer[3] + instructionBuffer[4] + instructionBuffer[5] + instructionBuffer[6] + instructionBuffer[7];
        instructionBuffer[8] = (uint8_t) (~checkSum & 0xff); // Check sum

        /*
        for (int i = 0; i<= elements; i++) {
            pc.printf("%c ", instructionBuffer[i]);
        }
        pc.printf("\n");
        */
        m_txEnable = 1;       // Enable Tx / Disable Rx
        for (int i = 0; i<= elements; i++) {
            m_link.putc(instructionBuffer[i]);
        }
        wait_ms(2);         // fix this!!!
        m_txEnable = 0;       // Disable Tx / Enable Rx
    } else {
        //pc.printf("Dynamixel not writeable\n");
    }
    wait_ms(10);
    if ( m_link.readable() && m_motorID != BROADCAST_ID ) {
        for (int i = 0; i<= STATUS_PACKET_LENGTH; i++) {
            statusBuffer[i] = m_link.getc();    // Read status packet
        }
    }
    return statusBuffer[4]; // Return error
}

uint8_t Dynamixel::setSpeed(uint16_t speed)
{
    // 0 to 1023 (0x3FF)
    uint8_t elements = 9;
    uint8_t instructionBuffer[elements];
    uint16_t checkSum = 0;
    uint8_t statusBuffer[STATUS_PACKET_LENGTH];
    
    if (m_link.writeable() ) {
        instructionBuffer[0] = 0xff;
        instructionBuffer[1] = 0xff;
        instructionBuffer[2] = m_motorID;                    // ID
        instructionBuffer[3] = 0x05;                         // Length
        instructionBuffer[4] = WRITE_DATA;                   // Instruction
        instructionBuffer[5] = ADDRESS_MOVING_SPEED;         // Parameter 1: Starting address
        instructionBuffer[6] = (uint8_t) speed & 0xff;       // Parameter 2: First value to be writen
        instructionBuffer[7] = (uint8_t) (speed >> 8);       // Parameter 3: Second value to be writen
        checkSum = instructionBuffer[2] + instructionBuffer[3] + instructionBuffer[4] + instructionBuffer[5] + instructionBuffer[6] + instructionBuffer[7];
        instructionBuffer[8] = (uint8_t) (~checkSum & 0xff); // Check sum

        /*
        for (int i = 0; i<= elements; i++) {
            pc.printf("%c ", instructionBuffer[i]);
        }
        pc.printf("\n");
        */
        m_txEnable = 1;       // Enable Tx / Disable Rx
        for (int i = 0; i<= elements; i++) {
            m_link.putc(instructionBuffer[i]);
        }
        wait_ms(2);         // fix this!!!
        m_txEnable = 0;       // Disable Tx / Enable Rx
    } else {
        //pc.printf("Dynamixel not writeable\n");
    }
    wait_ms(10);
       if ( m_link.readable() && m_motorID != BROADCAST_ID ) {
        for (int i = 0; i<= STATUS_PACKET_LENGTH; i++) {
            statusBuffer[i] = m_link.getc();    // Read status packet
        }
    }
    return statusBuffer[4]; // Return error
}