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| CALIBRE |
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| Usually a data pointer would already have been written using WriteByte. | ||||
Functional description | Sends a start code and the slave address. | |||||
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| The function waits for the address to be sent. Should a | ||||
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| the sending of an address then an error code 8004H is returned, otherwise the | ||||
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| status is returned. | ||||
3.3.6. | GetStatus |
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Function specification: | Int GetStatus(void) | |||||
Parameters are: | None | |||||
Parameters returned | int I2Cstatus | |||||
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| The current value of the bus status is returned. | ||||
Prerequisites | Adapter must be configured using Setup. | |||||
Functional description | The function reads status word from the Adapter and returns it. | |||||
3.3.7. | Recover |
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Function specification | Int Recover(void) | |||||
Parameters are: | None | |||||
Parameters returned | int ErrCode. | |||||
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| If the bus recovery failed error code 800FH is returned otherwise the status is | ||||
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| returned. | ||||
Prerequisites | Adapter must be configured using Setup. | |||||
Functional description | This function clears all USB buffers and issues three consecutive stop | |||||
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| commands on the bus, with a delay of about 5uS in between. It then clears the | ||||
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| Adapter registers and reads the status. This should normally set the Adapter | ||||
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| into a known idle state when a bus error or other problem has occurred. | ||||
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| If the status does not indicate bus free or the Bus Error bit is still set then | ||||
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| 800FH is returned otherwise the status is returned. | ||||
3.3.8.SlaveLastByte
Function specification | void SlaveLastByte(void) |
Parameters are: | None |
Parameters returned | None. |
Prerequisites | Adapter must be configured using setup. This function would normally only be |
| called following the end of a transmission in slave write mode - when the |
| Adapter is being read as a slave, by another master, not when writing to a slave |
| using the Adapter. |
Functional description | This function is used when the Adapter is a slave being read by a master |
| elsewhere on the bus - the Adapter is in slave write mode. The function must |
| be called immediately after the master indicates the last byte has been read (by |
| not acknowledging that byte). This function is required to clear the I2C data |
| lines so that the master can send a stop signal. |
Issue 1.0 | Page 9 |
01/07/03 |
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