File content as of revision 3:c6caae712d5d:

#include "Microduino_Protocol_HardSer.h"
#include "MicroduinoPinNames.h"

extern Timer g_Timer;
//DigitalOut myled(D13);
uint8_t getChecksum(uint8_t length, uint8_t cmd, uint8_t mydata[])
{
    //三个参数分别为： 数据长度  ，  指令代码  ，  实际数据数组
    uint8_t checksum = 0;
    checksum ^= (length & 0xFF);
    checksum ^= (cmd & 0xFF);
    for (int i = 0; i < length; i++) checksum ^= (mydata[i] & 0xFF);
    return checksum;
}

/* Protocol::Protocol(PRO_PORT *ser , byte _channel) {
  //  common_init();  // Set everything to common state, then...
  this->channel = _channel;
  this->num = 0;
  this->sta = false;
  this->error = false;
  P_Serial = ser; // ...override P_Serial with value passed.
  } */
#if 0
static void uart_callback(void)
{
    //myled = !myled;
}
#endif
void Protocol::begin(uint16_t _baud)
{
    //myled = 0;
    //_timer.start();
    //P_Serial->begin(_baud);
    P_Serial->baud(_baud);
    //P_Serial->attach(uart_callback, Serial::RxIrq);
    //delay(20);
    //wait_ms(20);
}

bool Protocol::available(bool _sta)
{
    //if (P_Serial->available() > 0) {
    if (P_Serial->readable() > 0) {
        if (_sta) {
            this->inCache = this->inChar;
            //this->inChar = P_Serial->read();
            this->inChar = P_Serial->getc();
            this->buffer[num] = this->inChar;

            if (this->num > BUFFER_MAX - 1) {
                this->num = 0;
                return false;
            } else {
                this->num++;
            }
        }
        return true;
    }
    return false;
}

uint8_t Protocol::parse(uint16_t* _data, bool _mod)
{
    if (available(!_mod)) {
        //time = millis();
        //time = _timer.read_ms();
        time = g_Timer.read_ms();
        do {
            if (this->sta) {
                this->sta = false;
                this->num = 0;
                if (this->inChar == this->channel) {
                    this->error = false;
                    if (!_mod) {
                        return P_BUSY;
                    }
                } else  {
                    this->error = true;
                    return P_ERROR;
                }
            }

            if (this->inChar == 0xBB && this->inCache == 0xAA) {
                this->sta = true;
                if (!_mod) {
                    return P_BUSY;
                }
            }

            if (this->num  == (CHANNEL_NUM * 2 + 1) && !this->error) {
                this->inCache = this->buffer[CHANNEL_NUM * 2];
                this->buffer[CHANNEL_NUM * 2] = NULL;
                this->inChar = getChecksum(CHANNEL_NUM * 2, 200, this->buffer);

                this->num = 0;
                if (!this->error && this->inCache == this->inChar) {
                    for (uint8_t a = 0; a < CHANNEL_NUM; a++) {
                        _data[a] = ((uint16_t)(this->buffer[a * 2])) | ((uint16_t)this->buffer[a * 2 + 1] << 8);
                    }
                    return P_FINE;
                } else {
                    return P_ERROR;
                }
            } else if (!_mod) {
                return P_BUSY;
            }
        } while (_mod && (available(true) && g_Timer.read_ms() - time < 100));

        if (_mod) {
            return P_TIMEOUT;
        }
    } else {
        return P_NONE;
    }
    return P_NONE;
}