C++ send_byte函数代码示例

/*
 *    reset the floppy.
 *
 *    The first thing that the driver needs to do is reset the controller.This 
 * will put it in a known state. To reset the primary floppy controller,(in C)
 *
 * 1.write 0x00 to the DIGITAL_OUTPUT_REG of the desired controller
 * 2.write 0x0C to the DIGITAL_OUTPUT_REG of the desired controller
 * 3.wait for an interrupt from the controller
 * 4.check interrupt status (this is function 0x08 of controllers)
 * 5.write 0x00 to the CONFIG_CONTROL_REG
 * 6.configure the drive desired on the controller (function 0x03 of controller)
 * 7.calibrate the drive (function 0x07 of controller)
 *
 */
static void reset( )
{
        //LOG("reset() called ...\n");

        /* stop the motor and disable IRQ/DMA */
        outb_p(0x0c,FD_DOR);

        /* program data rate (500K/s) */
        outb_p(0,FD_DCR);
        
        /* re-enable interrupts */
        outb_p(0x1c,FD_DOR);

        /* resetting triggered an interrupt - handle it */
        done = TRUE;
        wait_fdc(TRUE);

        /* specify drive timings (got these off the BIOS) */
        send_byte(FD_SPECIFY);
        send_byte(0xdf);      /* SRT = 3ms, HUT = 240ms */
        send_byte(0x06);      /* HLT = 16ms, ND = 0     */

        recalibrate();
}

void send_byte(uint8_t b) {

    switch(b) {
        case '\n':
            send_byte('\r');
            USART_SendData(USART3, '\n');
            while(USART_GetFlagStatus(USART3, USART_FLAG_TXE) == RESET);
            break;

        default:
            USART_SendData(USART3, b);
            break;

    }
    while(USART_GetFlagStatus(USART3, USART_FLAG_TXE) == RESET);
}

void send_data(unsigned char* data, int len)
{
    int i  = 0;

    output_38k();
    delay_us(NEC_HDR_MARK);
    output_38k_off();
    delay_us(NEC_HDR_MARK - PWM_DELAY);

    for (i = 0; i < len; i++)
        send_byte(data[i]);

    send_bit(1);
    delay_us(NEC_HDR_MARK- PWM_DELAY);

}

int Radio::connect() {
// Used on the arduino
   _rec = 0;
   if (is_connected()) return 0;
   for (int i=0; i<_max_connect_tries; i++) {
      _rec = get_byte();
      if (_rec == WAITING){
         while(!send_byte(CONNECT));
         return 0;
      }
      else delay(_WAITING_delay);
   }
   // failure to connect
   DEBUG("Failure to connect");
   return 1;
}

// log_num is used for logging numbers.
void log_num(int num)
{
  if(num < 0)
  {
    num *= -1;
    send_byte('-');
  }
    send_byte('0' + num/10000);
    send_byte('0' + (num/1000)%10);
    send_byte('0' + (num/100)%10);
    send_byte('0' + (num/10)%10);
    send_byte('0' + num%10);
    send_byte('|');
}

void graph_link_hle_device::rcv_complete()
{
	receive_register_extract();
	if (m_ready)
	{
		assert(m_empty);

		send_byte(get_received_char());
		m_ready = false;
	}
	else
	{
		m_buffer[m_head] = get_received_char();
		m_head = (m_head + 1) % BUFLEN;
		m_empty = false;
	}
}

void YADA_E7(U8 YY,U8 MM,U8 DD,U8 HH,U8 M,U8 SS)
{
    send_xy(0xaae7,0x55aa);
    send_word(0x5aa5);
    send_byte(YY);
    send_byte(MM);
    send_byte(DD);
    send_byte(HH);
    send_byte(M);
    send_byte(SS);
    send_end();
}

void send_int(int a)
{
    int temp;
    int rev=0;
    int dummy =a;
     while (dummy)
       {
          rev = rev * 10;
          rev = rev + dummy%10;
          dummy = dummy/10;
       }
    while(rev)
    {
        temp=rev%10;
        send_byte(0x30+temp);
        rev /=10;
    }
}

int8_t I2C::wait_dev_busy(uint8_t slaveAddress)
{
	int8_t ret;
	uint8_t i = 0;
	do
	{
		start();
		ret = send_7bits_address(slaveAddress);
		send_ack();
		send_byte(slaveAddress);
		stop();
		if(i++==100)
		{
			return -1;
		}
	}while(ret != 0);//如果返回值不是0，继续等待
	return 0;
}

void rs232_xmit_msg_task( void *pvParameters )
{
    serial_str_msg msg;
    int curr_char;

    while(1) {
        /* Read from the queue.  Keep trying until a message is received.  This
         * will block for a period of time (specified by portMAX_DELAY). */
        while(!xQueueReceive(serial_str_queue, &msg, portMAX_DELAY));

        /* Write each character of the message to the RS232 port. */
        curr_char = 0;
        while(msg.str[curr_char] != '\0') {
            send_byte(msg.str[curr_char]);
            curr_char++;
        }
    }
}

irom i2c_error_t i2c_send(int address, int length, const uint8_t *bytes)
{
	int current;
	i2c_error_t error;
	bool_t ack;

	if(!i2c_flags.init_done)
		return(i2c_error_no_init);

	if(state != i2c_state_idle)
		return(i2c_error_invalid_state_not_idle);

	state = i2c_state_header_send;

	if((error = send_header(address, i2c_direction_send)) != i2c_error_ok)
		return(error);

	for(current = 0; current < length; current++)
	{
		state = i2c_state_data_send_data;

		if((error = send_byte(bytes[current])) != i2c_error_ok)
			return(error);

		state = i2c_state_data_send_ack_receive;

		if((error = receive_ack(&ack)) != i2c_error_ok)
			return(error);

		state = i2c_state_data_send_ack_received;

		if(!ack)
			return(i2c_error_data_nak);
	}

	state = i2c_state_stop_send;

	if((error = send_stop()) != i2c_error_ok)
		return(error);

	state = i2c_state_idle;

	return(i2c_error_ok);
}

int send_string(int socketfd, const char* str)
{
	byte len;
	len = strlen(str);
	byte byte_str[len];

	// Send the length of the string
	if (send_byte(socketfd, len) != 1) {
		return -1;
	}

	// Now send the string itself
	strncpy(byte_str, str, len);
	if (send(socketfd, byte_str, len, 0) <= 0) {
		return -1;
	}

	return len;
}

/**********************************************************
函数名：HD7279初始化函数	
功  能：初始化HD7279（管脚配置、HD7279复位）
输  入：无
返  回：无
备  注：使用先，选配置管脚的宏定义
*********************************************************/		
void init_7279(void)	
{
	unsigned int tmr;
	
	DR7279 |= cs7279;		         //cs7279定义为输出
	DR7279 |= clk7279;		         //clk7279定义为输出
	DR7279 |= dat7279;		         //dat7279定义为输出
	DR7279 &= ~(key7279);		     //key7279定义为输入
	
	WR7279 |= cs7279;		         //cs7279初始化为1
 	WR7279 |= clk7279;		         //clk7279初始化为1
 	WR7279 |= dat7279;		         //dat7279初始化为1
 	WR7279 |= key7279;		         //key7279初始化为有弱上拉 
 	
 	for(tmr=0;tmr<0xf000;tmr++);	 //上电延时
 		
	send_byte(CMD_RESET);		     //复位HD7279
 		 	 		
}  	 

void printnum(uint32_t number)
{
	uint32_t temp = number;
	uint32_t max = 10;
	uint32_t counter = 0;
	do
	{
		temp /= 10;
		counter++;
	} while(temp > 0);
	for(temp = 0; temp < counter-1; temp++)
	{
		max *= 10;
	}
	for (; max > 1; max/=10)
	{
		send_byte((number%(max))/(max/10) + '0');
	}
}

SHT11::SHT11(DigitalInOut const& data, DigitalOut const& sck)
    : data_(data), sck_(sck)
{
    data_.mode(OpenDrain);
    data_ = 1;
    sck_ = 0;
    SHT11_setup_delay();
    /* Interface reset */
    for (int i=0; i<9; i++)
    {
        sck_ = 1;
        SHT11_clock_delay();
        sck_ = 0;
        SHT11_clock_delay();
    }
    start();
    send_byte(SHT11_RESET);
    delay_ms(SHT11_RESET_TIME_MS);
}