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464 | ingob | 1 | #ifndef __I2C0_H |
2 | #define __I2C0_H |
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3 | |||
4 | #include "i2c.h" |
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5 | extern volatile u32 I2C0_Timeout; |
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6 | |||
7 | |||
8 | // current I2C state |
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9 | extern volatile u8 I2C0_State; |
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10 | // the last I2C error |
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11 | extern volatile u8 I2C0_Error; |
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12 | |||
13 | #define I2C0_TIMEOUT 500 // 500 ms |
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14 | |||
15 | // define the size of the rx/tx buffer |
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16 | #define I2C0_Buffer_LEN 100 |
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17 | // transfer buffer should be filled after a successful |
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18 | // I2C_LockBuffer(...) and before a start of transmission |
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19 | // initiated by I2C_Transmission(...). |
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20 | extern volatile u8 I2C0_Buffer[]; |
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21 | |||
22 | void I2C0_Init(void); |
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23 | |||
24 | void I2C0_Deinit(void); |
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25 | |||
26 | // the pointer to the rxbuffer handler function |
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27 | // called by the IRQ routine after all bytes are recieved from slave |
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28 | |||
29 | // Initiate i2c transmission |
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30 | // A transmission sends first TxBytes from I2C_Buffer0 to slave |
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31 | // and then RxBytes are read from slave to I2C_Buffer0 |
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32 | // replacing the byte that have been sent. |
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33 | // Then the RxHandler function is called to handle the result. |
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34 | // This function returns imediatly after a start condition. |
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35 | // returns 1 if a transmission has been started, otherwise 0 |
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36 | u8 I2C0_Transmission(u8 SlaveAddr, u8 TxBytes, I2C_pRxHandler_t pRxHandler, u8 RxBytes); |
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37 | // try to allocate the I2C_Buffer0 within the timeout limit |
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38 | // returns 1 on success |
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39 | u8 I2C0_LockBuffer(u32 timeout); |
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40 | // wait until transmission progess is finished or timeout |
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41 | // returns 1 if no timeout occurs |
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42 | u8 I2C0_WaitForEndOfTransmission(u32 timeout); |
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43 | |||
44 | #endif // I2C_H |
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45 |