1 | #ifndef UARTInit
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2 | #define UARTInit
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3 |
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4 | #define EVEN 0
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5 | #define ODD 1
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6 |
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7 |
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8 | #include <math.h>
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9 | #include <avr/io.h>
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10 |
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11 | unsigned char ReceiveUART0(void)
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12 | {
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13 | while (! (UCSR0A & (1 << RXC0)) );
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14 |
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15 | return (UDR0);
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16 |
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17 | }
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18 |
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19 | void TransmitUART0(unsigned char data)
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20 | {
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21 | //Wait until the Transmitter is ready
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22 | while (! (UCSR0A & (1 << UDRE0)) );
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23 |
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24 | //Get that data outa here!
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25 | UDR0 = data;
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26 | }
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27 |
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28 | void InitializeUART0(int baud, char AsyncDoubleSpeed, char DataSizeInBits, char ParityEVENorODD, char StopBits, char USARTInterruptEnable)
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29 | {
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30 | uint16_t UBBRValue = lrint ((F_CPU / (16UL * baud) ) -1);
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31 |
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32 | if (AsyncDoubleSpeed == 1) UCSR0A = (1 << U2X0); //setting the U2X bit to 1 for double speed asynchronous
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33 | //UCSRA &= ~(1 << U2X); //setting the U2X bit to 0 for normal asynchronous
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34 |
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35 | //Put the upper part of the baud number here (bits 8 to 11)
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36 | UBRR0H = (unsigned char) (UBBRValue >> 8);
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37 |
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38 | //Put the remaining part of the baud number here
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39 | UBRR0L = (unsigned char) UBBRValue;
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40 |
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41 | //Enable the receiver and transmitter
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42 | UCSR0B = (1 << RXEN0) | (1 << TXEN0) |(1<<RXCIE0);
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43 |
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44 | //Enable interrupt
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45 | //if USARTinteruptEnable
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46 |
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47 | if (USARTInterruptEnable) UCSR0B |= (1<<RXCIE0);
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48 |
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49 | //Set 2 stop bits
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50 | if (StopBits == 2) UCSR0C = (1 << USBS0);
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51 |
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52 |
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53 | if (ParityEVENorODD == EVEN) UCSR0C |= (1 << UPM01); //Sets parity to EVEN
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54 | if (ParityEVENorODD == ODD) UCSR0C |= (3 << UPM00); //Alternative way to set parity to ODD
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55 |
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56 | if (DataSizeInBits == 6) UCSR0C |= (1 << UCSZ00); //6-bit data length
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57 | if (DataSizeInBits == 7) UCSR0C |= (2 << UCSZ00); //7-bit data length, or
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58 | if (DataSizeInBits == 8) UCSR0C |= (3 << UCSZ00); //8-bit data length, or
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59 | if (DataSizeInBits == 9) UCSR0C |= (7 << UCSZ00); //9-bit data length
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60 | }
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61 |
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62 | void InitializeUART1(int baud, char AsyncDoubleSpeed, char DataSizeInBits, char ParityEVENorODD, char StopBits, char USARTInterruptEnable )
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63 | {
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64 | uint16_t UBBRValue = lrint ((F_CPU / (16L * baud) ) -1);
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65 |
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66 | if (AsyncDoubleSpeed == 1) UCSR0A = (1 << U2X0); //setting the U2X bit to 1 for double speed asynchronous
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67 | //UCSRA &= ~(1 << U2X); //setting the U2X bit to 0 for normal asynchronous
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68 |
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69 | //Put the upper part of the baud number here (bits 8 to 11)
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70 | UBRR1H = (unsigned char) (UBBRValue >> 8);
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71 |
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72 | //Put the remaining part of the baud number here
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73 | UBRR1L = (unsigned char) UBBRValue;
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74 |
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75 | //Enable the receiver and transmitter
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76 | UCSR1B = (1 << RXEN1) | (1 << TXEN1);
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77 |
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78 | //Enable interrupt
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79 | //if USARTinteruptEnable
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80 |
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81 | if (USARTInterruptEnable) UCSR1B |= (1<<RXCIE1);
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82 |
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83 | //Set 2 stop bits
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84 | if (StopBits == 2) UCSR1C = (1 << USBS1);
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85 |
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86 |
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87 | if (ParityEVENorODD == EVEN) UCSR1C |= (1 << UPM11); //Sets parity to EVEN
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88 | if (ParityEVENorODD == ODD) UCSR1C |= (3 << UPM10); //Alternative way to set parity to ODD
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89 |
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90 | if (DataSizeInBits == 6) UCSR1C |= (1 << UCSZ10); //6-bit data length
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91 | if (DataSizeInBits == 7) UCSR1C |= (2 << UCSZ10); //7-bit data length, or
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92 | if (DataSizeInBits == 8) UCSR1C |= (3 << UCSZ10); //8-bit data length, or
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93 | if (DataSizeInBits == 9) UCSR1C |= (7 << UCSZ10); //9-bit data length
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94 | }
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95 |
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96 | #endif
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