Download BL600 smartBASIC Module

smart BASIC
User Manual
SPI Interface
This section describes all the events and routines used to interact with the SPI peripheral
available on the platform.
The BL600 module can only be configured as a SPI master.
The three signal lines are called SCK, MOSI and MISO, where the first two are outputs and the last
is an input.
A very good introduction to SPI can be found at
http://en.wikipedia.org/wiki/Serial_Peripheral_Interface_Bus and the reader is encouraged to
refer to it before using the api described in this section.
It is possible to configure the interface to operate in any one of the 4 modes defined for the SPI
bus which relate to the phase and polarity of the SCK clock line in relation to the data lines MISO
and MOSI. In addition, the clock frequency can be configured from 125,000 to 8000000 and it
can be configured so that it shifts data in/out most significant bit first or last.
Note: A dedicated SPI Chip Select (CS) line is not provided and it is up to the developer to
dedicate any spare gpio line for that function if more than one SPI slave is connected to the bus.
The SPI interface in this module assumes that prior to calling SPIREADWRITE, SPIREAD or SPIWRITE
functions the slave device has been selected via the appropriate gpio line.
SPI Events
The api provided in the module is synchronous and so there is no requirement for events.
SpiOpen
This function is used to open the main SPI peripheral using the parameters specified.
SPIOPEN (nMode, nClockHz, nCfgFlags, nHande)
Function
Returns:
INTEGER Indicates success of command:
0
0x5200
0x5207
0x5225
0x521D
0x522B
Exceptions
Opened successfully
Driver not found
Driver already open
Invalid Clock Frequency Requested
Driver resource unavailable
Invalid mode
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Arguments:
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