1 | #include <stdint.h>
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2 |
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3 | #include <avr/io.h>
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4 |
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5 | #include <avr/pgmspace.h>
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6 |
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7 | //mtE
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8 |
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9 |
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10 |
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11 | #include "dataflash.h"
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12 |
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13 |
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14 |
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15 | const uint8_t DF_pagebits[] PROGMEM ={ 9, 9, 9, 9, 9, 10, 10, 11}; //index of internal page address bits
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16 |
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17 | const uint16_t DF_pagesize[] PROGMEM ={264,264, 264, 264, 264, 528, 528,1056}; //index of pagesizes
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18 |
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19 |
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20 |
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21 |
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22 |
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23 |
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24 |
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25 | unsigned char PageBits = 0;
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26 |
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27 | unsigned int PageSize = 0;
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28 |
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29 |
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30 |
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31 | void DF_SPI_init (void)
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32 |
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33 | {
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34 |
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35 | PORTB |= (1<<PB1) | (1<<PB3) | (1<<PB4) | (1<<PB5);
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36 |
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37 | DDRB |= (1<<DDB1) | (1<<DDB3) | (1<<DDB5); //Set MOSI, SCK AND SS as outputs
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38 |
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39 | // mtE
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40 |
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41 | SPSR = (1<<SPI2X); //SPI double speed settings
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42 |
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43 | SPCR = (1<<SPE) | (1<<MSTR) | (1<<CPHA) | (1<<CPOL); //Enable SPI in Master mode, mode 3, Fosc/4
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44 |
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45 | }
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46 |
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47 |
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48 |
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49 | unsigned char DF_SPI_RW (unsigned char output)
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50 |
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51 | {
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52 |
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53 | unsigned char input;
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54 |
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55 |
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56 |
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57 | SPDR = output; //put byte 'output' in SPI data register
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58 |
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59 | while(!(SPSR & 0x80)); //wait for transfer complete, poll SPIF-flag
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60 |
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61 | input = SPDR; //read value in SPI data reg.
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62 |
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63 |
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64 |
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65 | return input; //return the byte clocked in from SPI slave
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66 |
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67 | }
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68 |
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69 |
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70 |
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71 |
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72 |
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73 |
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74 |
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75 | unsigned char Read_DF_status (void)
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76 |
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77 | {
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78 |
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79 | unsigned char result,index_copy;
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80 |
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81 | DF_CS_inactive; //make sure to toggle CS signal in order
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82 |
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83 | DF_CS_active; //to reset dataflash command decoder
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84 |
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85 | result = DF_SPI_RW(0x57); //send status register read op-code
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86 |
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87 | result = DF_SPI_RW(0x00); //dummy write to get result ### Hier hängt er###
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88 |
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89 |
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90 |
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91 | index_copy = ((result & 0x38) >> 3); //get the size info from status register
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92 |
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93 |
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94 |
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95 | PageBits = pgm_read_byte(&DF_pagebits[index_copy]); //get number of internal page address bits from look-up table
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96 |
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97 | PageSize = pgm_read_word(&DF_pagesize[index_copy]); //get the size of the page (in bytes)
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98 |
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99 |
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100 |
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101 | return result; //return the read status register value
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102 |
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103 | }
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104 |
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105 | int main(void)
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106 |
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107 | {
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108 |
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109 | unsigned char puffer[10];
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110 |
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111 |
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112 |
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113 |
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114 |
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115 | uart_init();
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116 |
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117 | uart_puts("Hallo");
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118 |
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119 |
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120 |
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121 | DF_SPI_init(); // init the SPI interface to communicate with the DataFlash
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122 |
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123 |
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124 |
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125 | char result = Read_DF_status();
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126 |
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127 |
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128 | sprintf(puffer,"%.2x\r\n",result);
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129 |
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130 | uart_puts("DF-Status 0x");
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131 | uart_puts(puffer);
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132 |
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133 |
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134 |
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135 |
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136 |
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137 | while(1) {
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138 |
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139 |
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140 |
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141 | }
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142 |
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143 |
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144 |
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145 | return 0;
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146 |
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147 | }
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