1 | TestStatus read_byte_24CXX(I2C_Master_t *i2c, uint8_t DeviceType, uint8_t DeviceAddress, uint8_t * stuff, uint16_t memAddr)
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2 | {
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3 | uint8_t slaveAddr;
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4 | uint32_t TimeOut = 10;
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5 |
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6 |
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7 | if (DeviceType == EEPROM_24C04)
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8 | {
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9 | if (memAddr >= 512)
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10 | return FAILED;
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11 |
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12 | // Hardwarepins sind nur E1 und E2 vorhanden, E0 wird zur Adressierung verwendet
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13 | slaveAddr = 0xA0 + ((DeviceAddress&0x02)<<2);
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14 |
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15 | if (memAddr >= 256)
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16 | slaveAddr += 0x02;
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17 | }
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18 | else
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19 | {
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20 | if (memAddr >= 8192)
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21 | return FAILED;
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22 |
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23 | slaveAddr = 0xA0 + ((DeviceAddress&0x07)<<1);
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24 | }
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25 |
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26 | TimeOut += SystemTicks;
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27 | /*----- Transmission Phase -----*/
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28 |
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29 | /* Send I2C1 START condition */
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30 | I2C_GenerateSTART(i2c->I2Cx, ENABLE);
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31 |
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32 | /* Test on I2C1 EV5 and clear it */
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33 | while(!I2C_CheckEvent(i2c->I2Cx, I2C_EVENT_MASTER_MODE_SELECT)) /* EV5 */
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34 | {
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35 | if(TimeOut == SystemTicks)
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36 | {
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37 | SET_I2C_NEW_ERROR(*i2c);
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38 | return FAILED;
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39 | }
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40 | }
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41 |
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42 | /* Send slave address for write */
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43 | I2C_Send7bitAddress(i2c->I2Cx, slaveAddr, I2C_Direction_Transmitter);
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44 |
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45 | /* Test on I2C1 EV6 and clear it */
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46 | while(!I2C_CheckEvent(i2c->I2Cx, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED)) /* EV6 */
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47 | {
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48 | if(TimeOut == SystemTicks)
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49 | {
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50 | // HIER TRITT EIN FEHLER AUF UND DIE ABARBEITUNG WIRD ABGEBROCHEN
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51 | SET_I2C_NEW_ERROR(*i2c);
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52 | return FAILED;
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53 | }
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54 | }
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55 |
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56 | if (DeviceType == EEPROM_24C64)
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57 | {
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58 | /* Send the specified register data pointer */
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59 | I2C_SendData(i2c->I2Cx, (uint8_t) (memAddr >> 8));
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60 |
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61 | /* Test on I2C1 EV8 and clear it */
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62 | while(!I2C_CheckEvent(i2c->I2Cx, I2C_EVENT_MASTER_BYTE_TRANSMITTED)) /* EV8 */
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63 | {
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64 | if(TimeOut == SystemTicks)
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65 | {
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66 | SET_I2C_NEW_ERROR(*i2c);
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67 | return FAILED;
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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 | /* Send the specified register data pointer */
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73 | I2C_SendData(i2c->I2Cx, (uint8_t)(memAddr));
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74 |
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75 | /* Test on I2C1 EV8 and clear it */
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76 | while(!I2C_CheckEvent(i2c->I2Cx, I2C_EVENT_MASTER_BYTE_TRANSMITTED)) /* EV8 */
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77 | {
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78 | if(TimeOut == SystemTicks)
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79 | {
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80 | SET_I2C_NEW_ERROR(*i2c);
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81 | return FAILED;
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82 | }
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83 | }
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84 |
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85 | /*----- Recieve Phase -----*/
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86 | /* Send I2C1 START condition */
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87 | I2C_GenerateSTART(i2c->I2Cx, ENABLE);
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88 |
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89 | /* Test on I2C1 EV5 and clear it */
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90 | while(!I2C_CheckEvent(i2c->I2Cx, I2C_EVENT_MASTER_MODE_SELECT)) /* EV5 */
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91 | {
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92 | if(TimeOut == SystemTicks)
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93 | {
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94 | SET_I2C_NEW_ERROR(*i2c);
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95 | return FAILED;
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96 | }
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97 | }
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98 |
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99 | /* Send STAD5627R slave address for write */
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100 | I2C_Send7bitAddress(i2c->I2Cx, slaveAddr, I2C_Direction_Receiver);
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101 |
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102 | /* Test on I2C1 EV6 and clear it */
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103 | while(!I2C_CheckEvent(i2c->I2Cx, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED)) /* EV6 */
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104 | {
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105 | if(TimeOut == SystemTicks)
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106 | {
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107 | SET_I2C_NEW_ERROR(*i2c);
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108 | return FAILED;
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109 | }
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110 | }
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111 |
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112 | /* Disable I2C1 acknowledgement */
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113 | I2C_AcknowledgeConfig(i2c->I2Cx, DISABLE);
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114 |
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115 | /* Send I2C1 STOP Condition */
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116 | I2C_GenerateSTOP(i2c->I2Cx, ENABLE);
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117 |
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118 | /* Test on EV7 and clear it */
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119 | while(!I2C_CheckEvent(i2c->I2Cx, I2C_EVENT_MASTER_BYTE_RECEIVED)) /* EV7 */
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120 | {
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121 | if(TimeOut == SystemTicks)
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122 | {
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123 | SET_I2C_NEW_ERROR(*i2c);
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124 | return FAILED;
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125 | }
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126 | }
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127 |
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128 | /* Store I2C1 received data */
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129 | *stuff = I2C_ReceiveData(i2c->I2Cx) ;
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130 |
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131 | return PASSED;
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132 | }
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