1 | /*----------------------------------------------------------------------------
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2 | Copyright: Radig Ulrich mailto: mail@ulrichradig.de
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3 | Author: Radig Ulrich
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4 | Remarks:
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5 | known Problems: none
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6 | Version: 14.06.2007
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7 | Description: RS232 Routinen
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8 | ----------------------------------------------------------------------------*/
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9 |
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10 | #include "usart.h"
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11 |
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12 | volatile unsigned char buffercounter = 0;
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13 | char usart_rx_buffer[BUFFER_SIZE];
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14 |
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15 | //----------------------------------------------------------------------------
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16 | //Init serielle Schnittstelle
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17 | void usart_init(unsigned int baudrate)
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18 | {
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19 | //Enable TXEN im Register UCR TX-Data Enable
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20 | UCR =(1 << TXEN | 1 << RXEN | 1<< RXCIE);
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21 | //Teiler wird gesetzt
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22 | UBRR=(SYSCLK / (baudrate * 16L) - 1);
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23 | }
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24 |
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25 | //----------------------------------------------------------------------------
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26 | //Routine für die Serielle Ausgabe eines Zeichens
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27 | void usart_write_char(char c)
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28 | {
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29 | if (c == '\n')
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30 | usart_write_char('\r');
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31 | //Warten solange bis Zeichen gesendet wurde
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32 | while(!(USR & (1<<UDRE)));
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33 | //Ausgabe des Zeichens
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34 | UDR = c;
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35 | return;
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36 | }
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37 |
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38 | //------------------------------------------------------------------------------
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39 | void usart_write_P (const char *Buffer,...)
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40 | {
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41 | va_list ap;
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42 | va_start (ap, Buffer);
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43 |
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44 | int format_flag;
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45 | char str_buffer[10];
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46 | char str_null_buffer[10];
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47 | char move = 0;
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48 | char Base = 0;
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49 | int tmp = 0;
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50 | char by;
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51 | char *ptr;
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52 |
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53 | //Ausgabe der Zeichen
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54 | for(;;)
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55 | {
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56 | by = pgm_read_byte(Buffer++);
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57 | if(by==0) break; // end of format string
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58 |
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59 | if (by == '%')
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60 | {
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61 | by = pgm_read_byte(Buffer++);
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62 | if (isdigit(by)>0)
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63 | {
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64 |
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65 | str_null_buffer[0] = by;
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66 | str_null_buffer[1] = '\0';
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67 | move = atoi(str_null_buffer);
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68 | by = pgm_read_byte(Buffer++);
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69 | }
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70 |
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71 | switch (by)
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72 | {
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73 | case 's':
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74 | ptr = va_arg(ap,char *);
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75 | while(*ptr) { usart_write_char(*ptr++); }
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76 | break;
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77 | case 'b':
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78 | Base = 2;
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79 | goto ConversionLoop;
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80 | case 'c':
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81 | //Int to char
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82 | format_flag = va_arg(ap,int);
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83 | usart_write_char (format_flag++);
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84 | break;
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85 | case 'i':
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86 | Base = 10;
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87 | goto ConversionLoop;
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88 | case 'o':
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89 | Base = 8;
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90 | goto ConversionLoop;
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91 | case 'x':
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92 | Base = 16;
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93 | //****************************
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94 | ConversionLoop:
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95 | //****************************
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96 | itoa(va_arg(ap,int),str_buffer,Base);
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97 | int b=0;
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98 | while (str_buffer[b++] != 0){};
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99 | b--;
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100 | if (b<move)
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101 | {
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102 | move -=b;
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103 | for (tmp = 0;tmp<move;tmp++)
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104 | {
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105 | str_null_buffer[tmp] = '0';
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106 | }
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107 | //tmp ++;
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108 | str_null_buffer[tmp] = '\0';
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109 | strcat(str_null_buffer,str_buffer);
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110 | strcpy(str_buffer,str_null_buffer);
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111 | }
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112 | usart_write_str (str_buffer);
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113 | move =0;
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114 | break;
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115 | }
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116 |
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117 | }
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118 | else
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119 | {
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120 | usart_write_char ( by );
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121 | }
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122 | }
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123 | va_end(ap);
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124 | }
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125 |
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126 | //----------------------------------------------------------------------------
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127 | //Ausgabe eines Strings
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128 | void usart_write_str(char *str)
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129 | {
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130 | while (*str)
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131 | {
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132 | usart_write_char(*str++);
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133 | }
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134 | }
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135 |
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136 | //Empfang eines Zeichens
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137 | ISR(USART_RXC_vect)
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138 | {
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139 | PORTC &= ~ (1<<PC1); // Zur überprüfung ob ISR überhaupt aufgerufen wird
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140 | /* unsigned char receive_char;
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141 | receive_char = (UDR);
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142 |
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143 | if (usart_status.usart_ready)
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144 | {
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145 | usart_status.usart_rx_ovl = 1;
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146 | return;
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147 | }
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148 |
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149 | if (receive_char == 13 && (!(usart_rx_buffer[buffercounter-1] == '\\')))
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150 | {
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151 |
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152 | usart_rx_buffer[buffercounter] = 0;
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153 | buffercounter = 0;
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154 | usart_status.usart_ready = 1;
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155 | return;
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156 | }
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157 |
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158 | if (buffercounter < BUFFER_SIZE - 1)
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159 | {
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160 | usart_rx_buffer[buffercounter++] = receive_char;
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161 | }
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162 | return; */
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163 | }
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