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Code: Select all

If LED_ON = 1, then LED's on : delay 300us 
Else  LED's off: no delay

Code: Select all

FCV_COUNTER = 0;
FCV_J = 0;

for (FCV_I = 0; FCV_I < 8; FCV_I++)
{
    while (FCV_COUNTER < 3) // Seems like counter < 3 is a good value for the display to be refreshed fast enough
    {
        // clear column ports
        FCM_MCP23018_Write(0, 0x13, 0xFF);
        FCM_MCP23018_Write(0, 0x12, 0xFF);

        // check which row will be detected : 0 for the 8 higher rows, 1 for the 8 lower rows
        FCV_J = FCV_COUNTER % 2;

        if (FCV_J == 0)
        {
            // clear lower 8 rows and enable one of the first rows
            FCM_MCP23018_Write(7, 0x13, 0);
            FCM_MCP23018_Write(7, 0x12, FCV_ROW_SELECT[FCV_I]);
        }
        else
        {
            // clear 8 higher rows and enable one of the last rows
            FCM_MCP23018_Write(7, 0x12, 0);
            FCM_MCP23018_Write(7, 0x13, FCV_ROW_SELECT[FCV_I]);
        }

        // get the higher byte and lower byte of an integer variable
        FCV_HIGHER_BYTE = ~((FCV_GAME_OF_LIFE_PREV[FCV_I + FCV_J * 8] >> 8 ) & 0xFF);
        FCV_LOWER_BYTE = ~(FCV_GAME_OF_LIFE_PREV[FCV_I + FCV_J * 8] & 0xFF);
   
       // send the data to the port expanders (column data)
        FCM_MCP23018_Write(0, 0x13, FCV_HIGHER_BYTE);
        FCM_MCP23018_Write(0, 0x12, FCV_LOWER_BYTE);

        // delay for 10ms
        delay_10us(1);

        // counter = counter + 1
        ++FCV_COUNTER;
    }

    // reset counter
    FCV_COUNTER = 0;
}

// clear column ports
FCM_MCP23018_Write(0, 0x13, 0xFF);
FCM_MCP23018_Write(0, 0x12, 0xFF);