1 | void UART1_Init(void)
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2 | {
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3 | IPC2bits.U1RXIP = 4;
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4 | IPC3bits.U1TXIP = 4;
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5 |
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6 | // UART konfigurieren:
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7 | // Baudrate (aufgerundet) einstellen
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8 | U1BRG = (unsigned int)((((unsigned long)FCY + ((4*(unsigned long)BAUDRATE)/2)) / (4*(unsigned long)BAUDRATE)) - 1);
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9 | // Modus: enable, stop in idle mode, use only U2TX and U2RX, 8-N, 1 stop bit
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10 | // U1MODE = (1 << 15) | (1 << 13) | (0 << 8) | (0 << 1) | (0 << 0);
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11 | U1MODE = (1 << 15);
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12 |
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13 | U1MODEbits.BRGH = 1;
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14 |
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15 | // Status: irq when tx done, transmit enable, irq when rx done
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16 | U1STA = (1 << 10);
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17 |
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18 | // TX-Interrupt-Flag löschen (wird durch Initialisierung ausgelöst)
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19 | IFS0bits.U1TXIF = 0;
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20 |
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21 | // Interrupts aktivieren
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22 | IEC0bits.U1TXIE = 1; // TX
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23 | IEC0bits.U1RXIE = 1; // RX
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24 | }
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25 |
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26 |
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27 | void hardwareInit(void)
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28 | {
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29 | //Oszillator initialisieren
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30 |
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31 | OSCCON = 0x0000;
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32 |
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33 | OSCCONbits.COSC0 = 1; //Interner FRC mit Postscaler (FRCDIV) ist eingestellt.
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34 | OSCCONbits.COSC1 = 1;
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35 | OSCCONbits.COSC2 = 1;
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36 |
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37 | OSCCONbits.SOSCEN = 0; //Secondary Oscillator deaktiviert.
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38 |
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39 | CLKDIV = 0x0000;
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40 |
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41 | CLKDIVbits.RCDIV0 = 0;
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42 | CLKDIVbits.RCDIV1 = 1;
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43 | CLKDIVbits.RCDIV2 = 0;
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44 |
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45 | //PPS initialisieren
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46 |
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47 |
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48 | //*************************************************************
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49 | // Unlock Registers
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50 | //*************************************************************
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51 | __builtin_write_OSCCONL(OSCCON & 0xbf); //clear the bit 6 of OSCCONL to
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52 | //unlock Pin Re-map
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53 | //******************************************************************
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54 |
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55 | //************************************************************
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56 | // Configure Input Functions
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57 | //************************************************************
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58 | //
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59 | // Zuweisen U1Rx zu Pin RP15
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60 | RPINR18bits.U1RXR = 15;
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61 |
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62 | // #ifdef DEBUG
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63 | // Zuweisen U2Rx zu Pin RP11
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64 | RPINR19bits.U2RXR = 11;
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65 | // #endif
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66 |
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67 | //************************************************************
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68 | // Configure Output Functions
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69 | //************************************************************
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70 | //
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71 | // Zuweisen U1Tx zu Pin RP13
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72 | //***************************
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73 | RPOR6bits.RP13R = 3;
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74 |
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75 | // #ifdef DEBUG
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76 | // Zuweisen U2TX zu Pin RP10
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77 | RPOR5bits.RP10R = 5;
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78 | // #endif
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79 |
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80 | // Zuweisen OC1 zu Pin RP21
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81 | RPOR10bits.RP21R = 18;
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82 |
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83 | //************************************************************
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84 | // Lock Registers
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85 | //************************************************************
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86 | __builtin_write_OSCCONL(OSCCON | 0x40); //set the bit 6 of OSCCONL to
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87 | //lock Pin Re-map
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88 | //******************************************************************
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89 |
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90 |
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91 | //PORTs initialisieren
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92 |
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93 | TRISA = (1<<0) //RA0,RA1,RA7 sind Eingänge, RA8-RA10 sind Ausgänge
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94 | | (1<<1)
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95 | | (1<<7)
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96 | ;
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97 | TRISB = (1<<0) //RB0,RB1,RB2,RB3,RB11,RB12,RB15 sind Eingänge
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98 | | (1<<1)
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99 | | (1<<2)
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100 | | (1<<3)
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101 | | (1<<11)
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102 | | (1<<12)
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103 | | (1<<15)
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104 | ;
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105 |
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106 | TRISC = (1<<0) //RC0,RC1,RC2 sind Eingänge
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107 | | (1<<1)
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108 | | (1<<2)
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109 | ;
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110 |
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111 | AD1PCFG = 0xFFFF; //Alle Portpins erstmal digitale I/Os
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112 |
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113 | LATA = 0x0000;
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114 | LATB = 0x0000;
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115 | LATC = 0x0000;
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116 | }
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117 |
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118 |
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119 |
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120 | // JTAG | Code Protect | Write Protect | Background Debugger | Clip-on Emulation mode
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121 | // ICD pins select | Watchdog Timer | Windowed WDT | Watchdog prescaler | Watchdog postscale)
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122 | _CONFIG1(JTAGEN_OFF & GCP_OFF & GWRP_OFF & BKBUG_OFF & COE_OFF & ICS_PGx2 & FWDTEN_OFF & WINDIS_OFF & FWPSA_PR32 & WDTPS_PS4096)
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123 | // Two Speed Start-up | Secondary Oscillator | Voltage Regulator Standby-mode Wake-up Timer
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124 | // Oscillator Selection | Clock switching and clock monitor | OSCO/RC15 function
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125 | // RP Register Protection | I2C1 pins Select | Oscillator Selection)
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126 | _CONFIG2(IESO_ON & SOSCSEL_SOSC & WUTSEL_LEG & FNOSC_FRCDIV & FCKSM_CSDCMD & OSCIOFNC_ON & IOL1WAY_OFF & I2C1SEL_PRI & POSCMOD_NONE)
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127 |
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128 |
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129 |
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130 | int main(void)
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131 | {
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132 | EnableWDT(WDT_ENABLE); //Watchdog-Timer per Software (SWDTEN) aktivieren.
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133 | hardwareInit();
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134 | ...
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135 |
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136 | while(1)
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137 | {
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138 | ClrWdt();
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139 |
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140 | ...
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141 |
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142 | //EnableWDT(WDT_DISABLE);
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143 | U1MODE |= (1 << 7); //Set WAKE-Bit für UART1
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144 | Sleep();
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145 |
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146 | }
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147 |
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148 | }
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