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3.3.9. | BlockWrite |
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Function specification | void BlockWrite(int SlaveWriteAddress, int MSB_WordAddress, int | |||||
Parameters are: | LSB_WordAddress,int NoBytesToSend, int NoTries ) | |||||
int SlaveAddress | ||||||
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| This is the address to be accessed via the I2C, e.g. A0H | ||||
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| int MSB_WordAddress, int LSB_WordAddress | ||||
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| This is the location within the slave for the data. The use of two bytes allows | ||||
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| users to communicate with devices requiring two byte pointers e.g. 24C64 | ||||
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| EEPROMS. If one (or both) of the word addresses are not required set the | ||||
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| value to a number greater than 255 and it will not be transmitted. | ||||
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| int NoBytesToSend | ||||
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| The number of bytes to be sent which MUST be pre loaded into the driver | ||||
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| buffers. The maximum size of this buffer is 2048 exceeding this WILL cause | ||||
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| the data to be corrupted. | ||||
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| Int NoTries | ||||
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| This is the number of times the Adapter is to try to send the address. | ||||
Parameters returned | None. | |||||
Prerequisites | Adapter must be configured using Setup. The data MUST be loaded into the | |||||
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| driver buffers PRIOR to calling this functions (see SetBlockData). | ||||
Functional description | This function causes the Adapter to send a block of data via the I2C bus. | |||||
3.3.10.SetBlockData
Function specification | int SetBlockData(int DataVal) |
Parameters are: | Int DataVal |
Parameters returned | Returns an unused integer. |
Prerequisites | Adapter must be configured using setup. |
Functional description | This stores data in the driver buffers read to be sent by the BlockWrite function. |
| MAXIMUM DATA SIZE 2048 bytes. |
3.3.11.BlockWriteStatus
Function specification | int BlockWriteStatus (void)) |
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Parameters are: | None |
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Parameters returned | int TransferStatus. |
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| Returns 0 if the transfer has not been completed. |
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| Returns the I2C Bus status if the transfer is completed. |
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| Returns 9009H if the transfer time out. |
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Prerequisites | Adapter must be configured using Setup. Data must have been sent using the | |||||
| BlockWrite function. |
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Functional description | Returns the current status of the BlockWrite transfer NOTE this function will |
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| time out if the block is not sent in NoBytes / 100 seconds (or 1 second which |
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3.3.12. BlockRead | ever is the greater). |
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Function specification | void | BlockRead(int | SlaveAddress, | int | MSB_WordAddress, | int |
Parameters are: | LSB_WordAddress, int NoBytesToRead, int NoTries ) |
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int SlaveAddress |
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| This is the address to be accessed via the I2C, e.g. A0H If the SlaveAddress is | |||||
| is a read address then the Word Addresses WILL NOT be sent. |
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| int MSB_WordAddress, int LSB_WordAddress |
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| This is the location within the slave for the data. The use of two bytes allows | |||||
| users to communicate with devices requiring two byte pointers e.g. 24C64 | |||||
| EEPROMS. If one (or both) of the word addresses are not required set the | |||||
| value to a number greater than 255 and it will not be transmitted. |
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| int NoBytesToRead |
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| The number of bytes to be sent which MUST be pre loaded into the driver | |||||
| buffers. The maximum size of this buffer is 2048 exceeding this WILL cause | |||||
| the data to be corrupted. |
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| Int NoTries |
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Issue 1.0 |
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| Page 10 |
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01/07/03 |
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