1 | #include <stdio.h> /* standard I/O .h-file */
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2 | #include <LPC213x.H> /* LPC213x definitions */
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3 |
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4 | typedef struct
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5 | {
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6 | unsigned long int baudrate;
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7 | unsigned char dataBits;
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8 | unsigned char stopBits;
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9 | unsigned char parity;
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10 | unsigned char PCD_adress;
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11 | } COM_TYP;
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12 |
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13 | COM_TYP com_var_1;
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14 | /******************************************************************************/
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15 | void init_serial (void)
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16 | {
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17 | IODIR1 = 0x03000000; /* LEDs P1.24,P1.23 defined as Outputs */
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18 | PINSEL0 = 0x00050005; /*Enable TxD1,TxD0,RxD1,RxD0*/
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19 | IODIR0 = 0x10400410; /*OUT: RTS0_P0.4, RTS1_P0.14, COM1_P0.22, COM0_P0.28*/
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20 | IOCLR0 = 0x10400010; /*LOW auf 0 COM1,0 = 0(RS485), RTS0=0(Sender)*/
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21 | IOSET0 = 0x00000400; /*HIGH auf 1 RTS1=1(Empfänger),P0.10*/
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22 | }
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23 | /******************************************************************************/
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24 | void init_uart1(void)
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25 | {
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26 | U1LCR = 0x83; /*8 bits, 1 stopbit, no Parity, enable DLAB*/
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27 | U1DLM = 0x01; /*9600 Baud Rate, 55.296.000 PCLK*/
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28 | U1DLL = 0x68; /*360dez=0x0168*/
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29 | U1LCR = 0x03; /*disable DLAB*/
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30 | U1FCR = 0x01; /*enable UART1-FIFO*/
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31 | }
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32 | /******************************************************************************/
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33 | funktion_mit_pcd_werten_fuellen(COM_TYP *pointer)
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34 | {
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35 | pointer->baudrate = 9600;
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36 | pointer->dataBits = 8;
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37 | pointer->stopBits = 1;
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38 | pointer->parity = 0;
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39 | pointer->PCD_adress = 77;
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40 | }
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41 | /******************************************************************************/
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42 | int uart0_init(COM_TYP *pointer)
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43 | {
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44 | unsigned char ucTemp;
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45 |
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46 | ucTemp = 0;
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47 | // Word Lenght Select
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48 | if (dataBits == 8)
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49 | ucTemp |= 0x03;
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50 | else if (dataBits == 7)
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51 | ucTemp |= 0x02;
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52 | else
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53 | return(1);
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54 |
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55 | // Stop Bit Select
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56 | if (stopBits == 1 )
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57 | ucTemp |= 0x00;
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58 | else if ( stopBits == 2 )
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59 | ucTemp |= 0x04;
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60 | else
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61 | return(1);
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62 |
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63 | // Parity Enable
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64 | if (parity == 0) //disable
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65 | ucTemp |= 0x00;
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66 | else if (parity == 1) //enable
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67 | ucTemp |= 0x04;
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68 | else
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69 | return(1);
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70 |
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71 | //Parity Select
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72 | if (parity == 'o')
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73 | ucTemp |= 0x00;
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74 | else if (parity == 'e')
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75 | ucTemp |= 0x10;
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76 | else if (parity == 1)
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77 | ucTemp |= 0x20;
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78 | else if (parity == 0)
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79 | ucTemp |= 0x30;
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80 | else
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81 | return(1);
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82 |
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83 | // Devisor Latch Access Bit(DLAB) enable
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84 | ucTemp |= 0x80;
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85 | U0LCR = ucTemp; /*8 bits, 1 stopbit, no Parity, enable DLAB*/
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86 |
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87 | // Baudrate Select
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88 | switch ( baudrate )
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89 | {
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90 | case 4800:
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91 | U0DLM = 0x02; /*4800 Baud Rate, 55.296.000 PCLK*/
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92 | U0DLL = 0xD0; /*720dez=0x02Do*/
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93 | break;
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94 | case 9600:
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95 | U0DLM = 0x01; /*9600 Baud Rate, 55.296.000 PCLK*/
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96 | U0DLL = 0x68; /*360dez=0x0168*/
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97 | break;
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98 | case 19200:
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99 | U0DLM = 0x00; /*19200 Baud Rate, 55.296.000 PCLK*/
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100 | U0DLL = 0x64; /*180dez=0x0064*/
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101 | break;
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102 | case 38400:
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103 | U0DLM = 0x00; /*38400 Baud Rate, 55.296.000 PCLK*/
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104 | U0DLL = 0x5A; /*90dez=0x005A*/
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105 | break;
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106 | case 76800:
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107 | U0DLM = 0x00; /*9600 Baud Rate, 55.296.000 PCLK*/
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108 | U0DLL = 0x68; /*45dez=0x003D*/
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109 | break;
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110 | default:
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111 | //return(ERR_COM_INIT_LINE_SETTINGS);
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112 | break;
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113 |
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114 | }
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115 |
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116 | // Devisor Latch Access Bit(DLAB) disable
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117 | ucTemp = 0;
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118 | ucTemp |= 0x00;
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119 | U0LCR = ucTemp;
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120 |
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121 | //FIFO UART enable
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122 | U0FCR = 0x01;
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123 | return 1;
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124 | }
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125 | /******************************************************************************/
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126 | void sendchar (void) { /* Write character to Serial Port */
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127 | while (!(U0LSR & 0x20));
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128 | (U0THR = 0x89);
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129 | (U0THR = 0x89);
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130 | (U0THR = 0x89);
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131 | (U0THR = 0x89);
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132 | (U0THR = 0x89);
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133 | (U0THR = 0x89);
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134 | (U0THR = 0x89);
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135 | (U0THR = 0x89);
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136 | }
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137 | /******************************************************************************/
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138 | int receivechar (void) { /* Read character from Serial Port */
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139 |
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140 | while (!(U1LSR & 0x01));
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141 |
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142 | return (U1RBR);
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143 | }
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144 | /******************************************************************************/
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145 |
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146 | int main (void)
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147 | {
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148 |
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149 | init_serial(); /* Initialize Serial Interface */
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150 | funktion_mit_pcd_werten_fuellen(&com_var_1);
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151 | init_uart1();
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152 | uart0_init(&com_var_1);
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153 | do
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154 | { /* Loop forever */
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155 | {
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156 | sendchar ();
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157 | }
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158 | } while(1);
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159 | }
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