11.1 MCC Generated Code

To generate this project using MPLAB Code Configurator (MCC) the next steps need to be followed:

1. Create a new MPLAB X IDE project for PIC18F47Q10.
2. Open the MCC from the toolbar (information about how to install the MCC plug-in can be found here).
3. Go to Project Resources → System → System Module and make the following configurations:
   • Oscillator Select: HFINTOSC
   • HF Internal Clock: 4 MHz
   • Clock Divider: 1
   • In the Watchdog Timer Enable field in the WWDT tab, WDT Disabled has to be selected
   • In the Programming tab, Low-Voltage Programming Enable has to be checked
4. From the Device Resources window, add TMR2, MSSP1 and make the following configurations:

   Timer2 Configuration:

   • Enable Timer: checked
   • Timer Clock tab
     • Clock Source: HFINTOSC
     • Clock Prescaler: 1:64
     • Postscaler: 1:1
   • Set 50 µs period in the Timer Period tab

   MSSP1 Configuration:

   • Serial Protocol: SPI
   • Mode: Master
   • SPI Mode: SPI Mode 0
   • Input Data Sampled At: Middle
   • Clock Source Selection: TMR2/2
   • Actual Clock Frequency (Hz): 10000.00
5. Open Pin Manager → Grid View window, select UQFN40 in the MCU package field, and make the following pin configurations:
   • Set Port C pin 6 (RC6) as output for Slave Select 1 (SS 1)
   • Set Port C pin 7 (RC7) as output for Slave Select 2 (SS 2)

   The SCK, SDO and SDI pins appear alongside the MSSP1 peripheral and have their direction preset.

   

6. Click Pin Module in the Project Resources and set the custom names SS pins:
   • Rename RC6 to Slave1
   • Rename RC7 to Slave2
7. Click Generate in the Project Resources tab.
8. In the main.c file generated by MCC, add the following code:
   • Control of Slave devices
   • Data transmission

   uint8_t writeData = 1;          /* Data that will be transmitted */
   uint8_t receiveData;            /* Data that will be received */
   
   void main(void)
   {
       // Initialize the device
       SYSTEM_Initialize();
   
       while (1)
       {
           SPI1_Open(SPI1_DEFAULT);
           Slave1_SetLow();
           receiveData = SPI1_ExchangeByte(writeData);
           Slave1_SetHigh();
           SPI1_Close();
           
           SPI1_Open(SPI1_DEFAULT);
           Slave2_SetLow();
           receiveData = SPI1_ExchangeByte(writeData);
           Slave2_SetHigh();
           SPI1_Close();
       }
   }