/* * *	Stuff that handles UART dte stuff. * *	Copyright (c) 1999 Richard J.M. Close * *	Can be freely distributed and used under the terms of the GNU GPL. */#include "io_dte.h"// Check wheteher dte or dce!// UART routines.void UART_ri_off(void){  if (io_uart_status != 4) {    io_uart_status = io_uart_status | 0x2000;    io_uart_msr = io_uart_msr | 4;  }  io_uart_status = io_uart_status & 0xFFFB;  io_uart_msr = io_uart_msr & 0xBF;}void UART_dsr_on(void){  if (io_uart_status == 2) {    io_uart_status = io_uart_status | 0x10;    io_uart_msr = io_uart_msr | 2;  }  io_uart_status = io_uart_status | 2;  io_uart_msr = io_uart_msr | 0x20;}void UART_dsr_off(void){  if (io_uart_status != 2) {    io_uart_status = io_uart_status | 0x10;    io_uart_msr = io_uart_msr | 2;  }  io_uart_status = io_uart_status & 0xFFFD;  io_uart_msr = io_uart_msr & 0xDF;}void UART_cts_off(void){  if (io_uart_status != 8) {    io_uart_status = io_uart_status | 0x20;    io_uart_msr = io_uart_msr | 1;  }  io_uart_status = io_uart_status & 0xFFF7;  io_uart_msr = io_uart_msr & 0xEF;}void UART_cts_on(void){  if (io_uart_status == 8) {    io_uart_status = io_uart_status | 0x20;    io_uart_msr = io_uart_msr | 1;  }  io_uart_status = io_uart_status | 8;  io_uart_msr = io_uart_msr | 0x10;}void UART_cd_off(void){  if (io_uart_status != 1) {    io_uart_status = io_uart_status | 0x1000;    io_uart_msr = io_uart_msr | 8;  }  io_uart_status = io_uart_status & 0xFFFE;  io_uart_msr = io_uart_msr & 0x7F;}void UART_cd_on(void){  if (io_uart_status == 1) {    io_uart_status = io_uart_status | 0x1000;    io_uart_msr = io_uart_msr | 8;  }  io_uart_status = io_uart_status | 1;  io_uart_msr = io_uart_msr | 0x80;}void UART_xoff_off(void){   io_uart_status = io_uart_status & 0x7FFF;}void UART_xoff_on(void){   io_uart_status = io_uart_status | 0x8000;}void UART_SetTxQue (unsigned char* app_pqTx, unsigned short app_cbqTx){   // arg_0		 = dword ptr  4  // arg_4		 = word	ptr  8  //eax = app_pqTx;  //cx = app_cbqTx;  if (app_pqTx != NULL){	// Save old values.	old_app_pqTx = app_pqTx;	old_app_cbqTx = app_cbqTx;  }  if ((app_pqTx == NULL) || (io_state == 9)){	// Setup buffer pointers.	io_dte_rx_sptr = &io_dte_rx_buff[0]; // buffer start.	io_dte_rx_eptr = &io_dte_rx_buff[0x1001]; // buffer end.	io_app_tx_sptr = &io_dte_rx_buff[0]; // buffer start.	io_app_tx_eptr = &io_dte_rx_buff[0x1001]; // buffer end.  }  else{	io_app_tx_sptr = app_pqTx;	io_app_tx_eptr = app_pqTx + app_cbqTx;  }  io_app_tx_data_update = 0;  UART_Flush(0);  io_esc_dte_wptr = io_dte_rx_wptr;}void UART_Flush(unsigned int arg1){  if (arg1 == 0) {	if (io_app_tx_sptr == io_dte_rx_sptr) {	  io_dte_rx_wptr = io_dte_rx_sptr;	  io_dte_rx_rptr = io_dte_rx_sptr;	}	io_app_tx_wptr = io_app_tx_sptr;	io_app_tx_rptr = io_app_tx_sptr;  }  if (arg1 == 1) {	io_dte_tx_wptr = io_dte_tx_sptr;	io_dte_tx_rptr = io_dte_tx_sptr;  }  io_app_tx_data_update = 0;}//--------------------------------------------------------------// More interesting stuff.bool io_get_dte_rx_char(unsigned char* the_rx_char){  unsigned char al;  // Check if read and write pointers are the same.  if (io_dte_rx_rptr == io_dte_rx_wptr) return false;  // Copy char from read position to supplied pointer.  al = *io_dte_rx_rptr;  *the_rx_char = al;  // Wind read position on one.  io_dte_rx_rptr++;  // Check whether the end of the buffer has been reached.  if (io_dte_rx_rptr >= io_dte_rx_eptr){    // Reached end of buffer so reset pointer.    io_dte_rx_rptr = io_dte_rx_sptr;  }  return true;}bool io_at_esc_seq_detected(void){  printf("io_at_esc_seq_detected: Warning not yet implemented!\n");  return false;}