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Rev | Author | Line No. | Line |
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41 | ingob | 1 | #ifndef __I2C_H |
2 | #define __I2C_H |
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1 | ingob | 3 | |
241 | killagreg | 4 | extern volatile u32 I2C1_Timeout; |
1 | ingob | 5 | |
241 | killagreg | 6 | // I2C states |
7 | #define I2C_STATE_UNDEF 0 |
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8 | #define I2C_STATE_IDLE 1 |
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9 | #define I2C_STATE_TX_PENDING 2 |
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10 | #define I2C_STATE_TX_PROGRESS 3 |
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11 | #define I2C_STATE_RX_PENDING 4 |
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12 | #define I2C_STATE_RX_PROGRESS 5 |
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13 | #define I2C_STATE_OFF 6 |
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41 | ingob | 14 | |
241 | killagreg | 15 | // current I2C state |
16 | extern volatile u8 I2C_State; |
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1 | ingob | 17 | |
241 | killagreg | 18 | #define I2C1_TIMEOUT 500 // 500 ms |
1 | ingob | 19 | |
241 | killagreg | 20 | // define the sizte of the rx and tx buffer |
21 | #define I2C_TXBUFFER_LEN 50 |
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22 | #define I2C_RXBUFFER_LEN 50 |
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23 | // transfer buffer should be filled before start of transmission only when I2C_State is I2C_STATE_IDLE |
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24 | extern volatile u8 I2C_TxBufferSize; |
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25 | extern volatile u8 I2C_TxBuffer[]; |
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41 | ingob | 26 | |
241 | killagreg | 27 | void I2C1_Init(void); |
1 | ingob | 28 | |
241 | killagreg | 29 | void I2C1_Deinit(void); |
41 | ingob | 30 | |
241 | killagreg | 31 | // the pointer to the rxbuffer handler function |
32 | // called by the IRQ routine after all bytes are recieved from slave |
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33 | typedef void (*I2C_pRxHandler_t) (u8* pRxBuffer, u8 RxBufferSize); |
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34 | // initiate i2c transmission |
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35 | // first all bytes from TxBuffer are send to slave |
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36 | // and then all bytes are read from slave and the RxHandler function is called |
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37 | // returns 1 if a transmission was started, otherwise 0 |
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38 | u8 I2C_Transmission(u8 SlaveAddr, I2C_pRxHandler_t pRxHandler, u8 RxBytes); |
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1 | ingob | 39 | |
41 | ingob | 40 | #endif // I2C_H |
1 | ingob | 41 |