Flowcode SPI component to max7219

[rider]

Hi members,
I want to send my frequncy counter data from flowcode5 to seven segment LCD driver Max7219. The LCD displays are 3 nos. Each 6 digits. The MCU is 16f877A with SPI interface. I am new to this interface. I appreciate if someone helps me how to use the SPI component in FC to output the segment information.

regards
rider

[kersing]

1) The MAX7219 is an LED driver, not an LCD driver.
2) Could you sign up for the Flowcode 5 forum and post over there?

To drive the MAX7219:

First you need to connect the appropriate PINs for SPI and a generic I/O pin for LOAD. Each MAX7219 needs a different I/O pin for LOAD to enable addressing them individually.

Generic way to do this:

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Set all LOAD pins high
SPI_Init()
Drive LOAD pin low.

If you want to use decode mode:

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SPI_Send_Char(0x09)
SPI_Send_Char(0xFF)

To display a digit:

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SPI_Send_Char(address in lower nibble)
SPI_Send_Char(digit to display according to table 5 or 6)

Drive LOAD pin high.

For each digit you want to display you repeat:

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Drive LOAD pin low.
SPI_Send_Char(address in lower nibble)
SPI_Send_Char(digit to display according to table 5 or 6)
Drive LOAD pin high.

With the appropriate LOAD pin, address and digit information.

[rider]

Hi Kersing,
Thankyou for the support. Could you please give me an simple example of how this is implemented in FC flowchart.

Rider