1 | /*-------------------------------------------------------------------------+ |
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2 | | printk.c v1.1 - PC386 BSP - 1997/08/07 |
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3 | +--------------------------------------------------------------------------+ |
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4 | | (C) Copyright 1997 - |
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5 | | - NavIST Group - Real-Time Distributed Systems and Industrial Automation |
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6 | | |
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7 | | http://pandora.ist.utl.pt |
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8 | | |
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9 | | Instituto Superior Tecnico * Lisboa * PORTUGAL |
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10 | +--------------------------------------------------------------------------+ |
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11 | | Disclaimer: |
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12 | | |
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13 | | This file is provided "AS IS" without warranty of any kind, either |
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14 | | expressed or implied. |
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15 | +--------------------------------------------------------------------------+ |
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16 | | This code is based on code by: Jose Rufino - IST |
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17 | | |
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18 | | $Id$ |
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19 | +--------------------------------------------------------------------------*/ |
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20 | |
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21 | |
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22 | #include <stdarg.h> |
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23 | #include <stdio.h> |
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24 | #include <bspIo.h> |
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25 | #include <libcpu/cpu.h> |
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26 | |
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27 | /*-------------------------------------------------------------------------+ |
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28 | | Function: printNum |
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29 | | Description: print number in a given base. |
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30 | | Global Variables: None. |
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31 | | Arguments: num - number to print, base - base used to print the number. |
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32 | | Returns: Nothing. |
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33 | +--------------------------------------------------------------------------*/ |
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34 | static void |
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35 | printNum(long unsigned int num, int base, int sign) |
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36 | { |
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37 | long unsigned int n; |
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38 | int count; |
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39 | char toPrint[20]; |
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40 | |
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41 | if ( (sign == 1) && ((long)num < 0) ) { |
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42 | BSP_output_char('-'); |
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43 | num = -num; |
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44 | } |
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45 | |
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46 | count = 0; |
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47 | while ((n = num / base) > 0) { |
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48 | toPrint[count++] = (num - (n*base)); |
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49 | num = n ; |
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50 | } |
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51 | toPrint[count++] = num; |
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52 | |
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53 | for (n = 0; n < count; n++){ |
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54 | BSP_output_char("0123456789ABCDEF"[(int)(toPrint[count-(n+1)])]); |
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55 | } |
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56 | } /* printNum */ |
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57 | |
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58 | |
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59 | /*-------------------------------------------------------------------------+ |
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60 | | Function: printk |
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61 | | Description: a simplified version of printf intended for use when the |
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62 | console is not yet initialized or in ISR's. |
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63 | | Global Variables: None. |
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64 | | Arguments: as in printf: fmt - format string, ... - unnamed arguments. |
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65 | | Returns: Nothing. |
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66 | +--------------------------------------------------------------------------*/ |
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67 | void |
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68 | printk(char *fmt, ...) |
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69 | { |
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70 | va_list ap; /* points to each unnamed argument in turn */ |
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71 | char c, *str; |
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72 | int lflag, base, sign; |
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73 | unsigned int level; |
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74 | |
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75 | _CPU_ISR_Disable(level); |
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76 | |
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77 | va_start(ap, fmt); /* make ap point to 1st unnamed arg */ |
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78 | for (; *fmt != '\0'; fmt++) |
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79 | { |
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80 | lflag = 0; |
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81 | base = 0; |
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82 | sign = 0; |
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83 | if (*fmt == '%') |
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84 | { |
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85 | if ((c = *++fmt) == 'l') |
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86 | { |
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87 | lflag = 1; |
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88 | c = *++fmt; |
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89 | } |
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90 | switch (c) |
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91 | { |
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92 | case 'o': case 'O': base = 8; sign = 0; break; |
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93 | case 'd': case 'D': base = 10; sign = 1; break; |
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94 | case 'u': case 'U': base = 10; sign = 0; break; |
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95 | case 'x': case 'X': base = 16; sign = 0; break; |
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96 | case 's': |
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97 | for (str = va_arg(ap, char *); *str; str++) |
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98 | BSP_output_char(*str); |
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99 | break; |
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100 | case 'c': |
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101 | BSP_output_char(va_arg(ap, char)); |
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102 | break; |
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103 | default: |
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104 | BSP_output_char(c); |
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105 | break; |
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106 | } /* switch*/ |
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107 | |
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108 | if (base) |
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109 | printNum(lflag ? va_arg(ap, long int) : (long int)va_arg(ap, int), |
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110 | base, sign); |
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111 | } |
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112 | else |
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113 | { |
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114 | BSP_output_char(*fmt); |
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115 | } |
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116 | } |
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117 | va_end(ap); /* clean up when done */ |
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118 | _CPU_ISR_Enable(level); |
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119 | |
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120 | } /* printk */ |
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121 | |
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