1 | /*
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2 | * File: usart26K80.c
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3 | * Author: vloki
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4 | *
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5 | * Created on 22. Juni 2017, 09:30
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6 | */
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7 |
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8 |
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9 | #include <xc.h>
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10 |
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11 | // #pragma config statements should precede project file includes.
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12 | // Use project enums instead of #define for ON and OFF.
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13 |
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14 | // CONFIG1L
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15 | #pragma config RETEN = OFF // VREG Sleep Enable bit (Ultra low-power regulator is Disabled (Controlled by REGSLP bit))
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16 | #pragma config INTOSCSEL = HIGH // LF-INTOSC Low-power Enable bit (LF-INTOSC in High-power mode during Sleep)
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17 | #pragma config SOSCSEL = HIGH // SOSC Power Selection and mode Configuration bits (High Power SOSC circuit selected)
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18 | #pragma config XINST = OFF // Extended Instruction Set (Disabled)
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19 |
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20 | // CONFIG1H
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21 | #pragma config FOSC = INTIO2 // Oscillator (Internal RC oscillator)
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22 | #pragma config PLLCFG = ON // PLL x4 Enable bit (Enabled)
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23 | #pragma config FCMEN = OFF // Fail-Safe Clock Monitor (Disabled)
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24 | #pragma config IESO = OFF // Internal External Oscillator Switch Over Mode (Disabled)
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25 |
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26 | // CONFIG2L
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27 | #pragma config PWRTEN = ON // Power Up Timer (Enabled)
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28 | #pragma config BOREN = OFF // Brown Out Detect (Disabled in hardware, SBOREN disabled)
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29 | #pragma config BORV = 3 // Brown-out Reset Voltage bits (1.8V)
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30 | #pragma config BORPWR = ZPBORMV // BORMV Power level (ZPBORMV instead of BORMV is selected)
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31 |
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32 | // CONFIG2H
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33 | #pragma config WDTEN = SWDTDIS // Watchdog Timer (WDT enabled in hardware; SWDTEN bit disabled)
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34 | #pragma config WDTPS = 1048576 // Watchdog Postscaler (1:1048576)
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35 |
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36 | // CONFIG3H
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37 | #pragma config CANMX = PORTB // ECAN Mux bit (ECAN TX and RX pins are located on RB2 and RB3, respectively)
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38 | #pragma config MSSPMSK = MSK7 // MSSP address masking (7 Bit address masking mode)
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39 | #pragma config MCLRE = ON // Master Clear Enable (MCLR Enabled, RE3 Disabled)
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40 |
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41 | // CONFIG4L
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42 | #pragma config STVREN = ON // Stack Overflow Reset (Enabled)
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43 | #pragma config BBSIZ = BB2K // Boot Block Size (2K word Boot Block size)
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44 |
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45 | // CONFIG5L
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46 | ...
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47 |
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48 |
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49 | #define _XTAL_FREQ 64000000UL
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50 |
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51 | void putByte(char data);
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52 | void writeString(char *str);
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53 | void UARTInit(void);
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54 |
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55 | void main(void) {
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56 | OSCCONbits.IRCF = 0b111; // interner Oszillator 16MHz
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57 | OSCTUNEbits.PLLEN = 1;
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58 | // while(OSCCONbits.HFIOFS == 0){;} // wait until stable
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59 | __delay_ms(1);
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60 |
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61 | UARTInit();
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62 |
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63 | volatile char a = 'a';
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64 | volatile char d;
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65 | volatile char c;
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66 | while(1)
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67 | {
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68 | while(TXSTA1bits.TRMT!=1 || PIR1bits.TX1IF!=1);
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69 | TXREG1 = a; // -> funktioniert
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70 | __delay_ms(500);
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71 |
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72 | while(TXSTA1bits.TRMT!=1 || PIR1bits.TX1IF!=1);
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73 | TXREG1 = 'b'; // -> funktioniert
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74 |
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75 | __delay_ms(200);
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76 |
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77 | c = 'c';
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78 | while(TXSTA1bits.TRMT!=1 || PIR1bits.TX1IF!=1);
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79 | TXREG1 = c; // -> funktioniert
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80 |
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81 |
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82 | d = 'd';
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83 | putByte(d); // -> funktioniert
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84 | __delay_ms(200);
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85 |
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86 | while(TXSTA1bits.TRMT!=1 || PIR1bits.TX1IF!=1);
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87 | TXREG1 = '\r';
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88 | __delay_ms(200);
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89 | writeString("HelloWorld"); // -> funktioniert
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90 | __delay_ms(1000);
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91 | char test[]= "Test-String";
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92 | writeString(test); // -> funktioniert
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93 |
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94 | __delay_ms(1000);
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95 | }
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96 | // return;
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97 | }
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98 |
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99 | void putByte(char data)
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100 | {
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101 | while(TXSTA1bits.TRMT!=1 || PIR1bits.TX1IF!=1);
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102 | TXREG1 = data;
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103 | }
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104 |
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105 | void writeString(char *str)
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106 | {
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107 | while(*str)
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108 | {
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109 | putByte(*str);
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110 | ++str;
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111 | }
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112 | }
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113 |
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114 | void UARTInit(void)
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115 | {
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116 | TRISCbits.TRISC6 = 1;
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117 | TRISCbits.TRISC7 = 1;
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118 |
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119 | // Values from data sheet with Baudrate 9600
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120 | // Initialising BaudRate value
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121 | SPBRGH1 = 0x06;
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122 | SPBRG1 = 0x82;
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123 |
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124 | TXSTA1bits.BRGH = 1; // 1 = high speed baud rate
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125 | // 0 = low speed baud rate
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126 | BAUDCON1bits.BRG16 = 1; // 1 = 16 bit baud rate generator
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127 | // 0 = 8 bit baud rate generator
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128 | TXSTA1bits.TX9 = 0; // 0 = select 8-bit transmission
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129 | TXSTA1bits.SYNC = 0; // 0 = async mode
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130 | TXSTA1bits.SENDB = 0; // 1 = send sync break on next transmission
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131 | // 0 = sync break transmission completed
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132 | RCSTA1bits.SPEN = 1; // 1 = serial port enable
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133 | RCSTA1bits.CREN = 1; // 1 = enable receiver
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134 | // BAUDCON1bits.TXCKP = 0; // 1 = idle state for transmit is HIGH
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135 | // 0 = idle state for transmit is LOW
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136 |
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137 | TXSTA1bits.TXEN = 1; // 1 = transmit is enabled
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138 | }
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