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annotate packages/hal/arm/edb7xxx/current/support/io.c @ 208:e0c0827131d1 ecos

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Merge from eCos master repository on 2002-05-20-20:11:54-BST
author jlarmour
date Mon, 20 May 2002 22:19:26 +0000
parents d60da272beeb
children d2c90368aeef
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1 //==========================================================================
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2 //
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3 // io.c
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4 //
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5 // Linux I/O support for Cirrus Logic EDB7xxx eval board tools
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6 //
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7 //==========================================================================
208
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8 //####ECOSGPLCOPYRIGHTBEGIN####
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9 // -------------------------------------------
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10 // This file is part of eCos, the Embedded Configurable Operating System.
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11 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
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12 //
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13 // eCos is free software; you can redistribute it and/or modify it under
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14 // the terms of the GNU General Public License as published by the Free
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15 // Software Foundation; either version 2 or (at your option) any later version.
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16 //
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17 // eCos is distributed in the hope that it will be useful, but WITHOUT ANY
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18 // WARRANTY; without even the implied warranty of MERCHANTABILITY or
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19 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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20 // for more details.
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21 //
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22 // You should have received a copy of the GNU General Public License along
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23 // with eCos; if not, write to the Free Software Foundation, Inc.,
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24 // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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25 //
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26 // As a special exception, if other files instantiate templates or use macros
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27 // or inline functions from this file, or you compile this file and link it
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28 // with other works to produce a work based on this file, this file does not
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29 // by itself cause the resulting work to be covered by the GNU General Public
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30 // License. However the source code for this file must still be made available
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31 // in accordance with section (3) of the GNU General Public License.
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32 //
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33 // This exception does not invalidate any other reasons why a work based on
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34 // this file might be covered by the GNU General Public License.
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35 //
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36 // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
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37 // at http://sources.redhat.com/ecos/ecos-license
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38 // -------------------------------------------
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39 //####ECOSGPLCOPYRIGHTEND####
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40 //==========================================================================
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41 //#####DESCRIPTIONBEGIN####
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42 //
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43 // Author(s): gthomas
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44 // Contributors: gthomas
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45 // Date: 1999-06-16
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46 // Description: Linux I/O support for Cirrus Logic EDB7xxx FLASH tools
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47 //####DESCRIPTIONEND####
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48
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49 //
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50 // io.c - I/O functions
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51 //
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52
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53 #include <stdio.h>
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54 #include <sys/ioctl.h>
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55 #include <fcntl.h>
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56 #include <termios.h>
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57 #include <errno.h>
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58
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59 char _ReceiveChar(long port)
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60 {
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61 char buf;
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62 int res;
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63 // Port is in non-blocking mode, this needs to have a loop
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64 do {
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65 res = read(port, &buf, 1);
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66 } while (res < 0);
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67 // printf("Read: %c\n", buf);
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68 return buf;
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69 }
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70
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71 static void
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72 uspin(int len)
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73 {
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74 volatile int cnt;
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75 while (--len >= 0) {
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76 for (cnt = 1; cnt < 2000; cnt++) ;
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77 }
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78 }
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79
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80 void _SendChar(long port, char ch)
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81 {
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82 char buf = ch;
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83 write(port, &buf, 1);
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84 // printf("Send: %x\n", ch);
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85 // usleep(100);
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86 uspin(100);
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87 }
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88
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89 void _SetBaud(long port, long reqRate)
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90 {
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91 struct termios buf;
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92 int rate;
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93
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94 // Get original configuration
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95 if (tcgetattr(port, &buf)) {
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96 fprintf(stderr, "Can't get port config\n");
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97 return;
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98 }
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99
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100 // Reset to raw.
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101 buf.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
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102 |INLCR|IGNCR|ICRNL|IXON);
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103 buf.c_oflag &= ~OPOST;
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104 buf.c_lflag &= ~(ECHO|ECHONL|ICANON|ISIG|IEXTEN);
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105 buf.c_cflag &= ~(CSIZE|PARENB);
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106 buf.c_cflag |= CS8;
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107
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108 // Set baud rate.
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109 switch (reqRate) {
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110 case 9600:
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111 rate = B9600;
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112 break;
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113 case 38400:
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114 rate = B38400;
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115 break;
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116 case 57600:
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117 rate = B57600;
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118 break;
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119 case 115200:
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120 rate = B115200;
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121 break;
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122 }
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123 cfsetispeed(&buf, rate);
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124 cfsetospeed(&buf, rate);
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125
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126 // Set data bits.
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127 buf.c_cflag &= ~CSIZE;
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128 buf.c_cflag |= CS8;
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129
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130 // Set stop bits.
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131 buf.c_cflag &= ~CSTOPB; // One stop
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132
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133 // Set parity.
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134 buf.c_cflag &= ~(PARENB | PARODD); // no parity.
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135
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136 // Set the new settings
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137 if (tcsetattr(port, TCSADRAIN, &buf)) {
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138 fprintf(stderr, "Error: tcsetattr\n");
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139 return;
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140 }
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141
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142 tcdrain(port);
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143 usleep(1000000/10*2);
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144 sleep(2);
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145 }
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146
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147 int _CharReady(long port)
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148 {
169
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149 #ifdef __CYGWIN__
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150 // Windows doesn't support the below ioctl
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151 return 1;
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152 #else
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153 int n, res;
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154 res = ioctl(port, FIONREAD, &n);
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155 if (res < 0) {
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156 fprintf(stderr, "I/O error: %s\n", strerror(errno));
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157 exit(1);
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158 }
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159 return n; // Non-zero if characters ready to read
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160 #endif
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161 }
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162
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163 void _WaitForOutputEmpty(long port)
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164 {
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165 usleep(2000000);
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166 }
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167
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168 long _OpenPort(char *name)
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169 {
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170 int fd;
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171 fd = open(name, O_RDWR|O_NONBLOCK);
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172 return fd;
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173 }