DSPIC33EP512MU810 SPI Problem..!

[kartal_0689]

Hi,
I'm using DSPIC33EP5121MU810 processor.
SPI pins of the processor which.
And how the use?
Can you give examples of software?

Ismail SORAN
R&D Engineering
TURKEY/ANK.

[VCC]

Hi,
this is a test program for a custom board, but I hope is a good example . It sends 8 16-bit packets in an SPI transaction (active CS).

Code: Select all

{ Declarations section }

var
  LED0: sbit at LATF.5;
  LED1: sbit at LATF.4;
  LED2: sbit at LATD.15;
  LED3: sbit at LATD.14;
  
  CS: sbit at LATG.9;
  
  Ch0, Ch1, Ch2, Ch3: Word;
  Ch4, Ch21, Ch20, Ch8: Word;
  
procedure SetOSC;
begin
  //PLLPRE := 0;
  CLKDIV.4 := 0;
  CLKDIV.3 := 0;
  CLKDIV.2 := 0;
  CLKDIV.1 := 0;
  CLKDIV.0 := 0;
  
  //PLLPOST := 0;
  CLKDIV.7 := 0;
  CLKDIV.6 := 0;
  
  //PLLDIV := 68
  PLLFBD := 68;
end;

procedure SetUSBOsc;
begin
  //use primary oscillator - 8MHz
  ACLKCON3.ASRCSEL := 1; //1= Primary Oscillator is the clock source for APLL
  ACLKCON3.FRCSEL := 0; //0= Auxiliary Oscillator or Primary Oscillator is the clock source for APLL (determined by ASRCSEL bit)
  ACLKCON3.SELACLK := 1; //1= Auxiliary PLL or oscillator provides the source clock for auxiliary clock divider
  
  //APLLPOST := 6  //110= Divided by 2
  ACLKCON3.7 := 1;
  ACLKCON3.6 := 1;
  ACLKCON3.5 := 0;
  
  //APLLPRE := 1  = N1 //001= Divided by 2       => FAREF = 4MHz (input to APLL)
  ACLKCON3.2 := 0;
  ACLKCON3.1 := 0;
  ACLKCON3.0 := 1;
  
  //FAVCO must be 96MHz (output from APLL)
  //FAVCO = FAIN * M / N1 = 8MHz * M / 2 = 4MHz * M
  //M = 24  => FAVCO = 4MHz * 24 = 96MHz
  ACLKDIV3 := 7; //111= 24
  
  ACLKCON3.ENAPLL := 1; //1= APLL is enabled, the USB clock source is the APLL output
end;

begin
  Delay_ms(100);
  
  SetOSC;
  SetUSBOsc;
  
  TRISF.5 := 0;
  TRISF.4 := 0;
  TRISD.15 := 0;
  TRISD.14 := 0;
  
  TRISG.9 := 0;    //CS
  TRISG.6 := 0;    //SCK
  TRISG.8 := 0;    //SDO
  
  LED0 := not LED0;
  LED1 := not LED1;
  LED2 := not LED2;
  LED3 := not LED3;
  Delay_ms(200);
  
  LED0 := not LED0;
  LED1 := not LED1;
  LED2 := not LED2;
  LED3 := not LED3;
  Delay_ms(200);
  
  LED0 := not LED0;
  LED1 := not LED1;
  LED2 := not LED2;
  LED3 := not LED3;
  Delay_ms(200);

  LED0 := not LED0;
  LED1 := not LED1;
  LED2 := not LED2;
  LED3 := not LED3;
  //Delay_ms(200);
  
  CS := 1;
  
  SPI2_Init_Advanced(_SPI_MASTER, _SPI_16_BIT, _SPI_PRESCALE_SEC_1, _SPI_PRESCALE_PRI_1, _SPI_SS_DISABLE, _SPI_DATA_SAMPLE_MIDDLE, _SPI_CLK_IDLE_LOW, _SPI_IDLE_2_ACTIVE);
  
  ADC1_Init; //TAD = 32*Tcy
  
  //TAD = 12*Tcy
  AD1CON3.7 := 0;
  AD1CON3.6 := 0;
  AD1CON3.5 := 0;
  AD1CON3.4 := 1;
  AD1CON3.3 := 0;
  AD1CON3.2 := 1;
  AD1CON3.1 := 1;
  
  {repeat
    LED0 := not LED0;
    LED1 := not LED1;
    LED2 := not LED2;
    LED3 := not LED3;
    Delay_ms(500);
  until False;   }
  
  repeat
    Ch0 := ADC1_Get_Sample(0);
    Ch1 := ADC1_Get_Sample(1);
    Ch2 := ADC1_Get_Sample(2);
    Ch3 := ADC1_Get_Sample(3);
    
    Ch4 := ADC1_Get_Sample(4);
    Ch21 := ADC1_Get_Sample(21);
    Ch20 := ADC1_Get_Sample(20);
    Ch8 := ADC1_Get_Sample(8);
    
    CS := 0;
    SPI2_Write(Ch0);
    SPI2_Write(Ch1);
    SPI2_Write(Ch2);
    SPI2_Write(Ch3);
    
    SPI2_Write(Ch4);
    SPI2_Write(Ch21);
    SPI2_Write(Ch20);
    SPI2_Write(Ch8);
    CS := 1;
  until False;
end.

And here are the PIC settings generated using Dany's Project configuration tool http://www.libstock.com/projects/view/9 ... ne-version

Code: Select all

MCU Name     : P33EP512MU810

FGS: $F80004:$0003
General Segment Write-Protect bit (GWRP)          : Disabled (= "1")
General Segment Code-Protect bit (GSS)            : Disabled (= "1")
General Segment Key bits (GSSK)                   : Disabled (= "00")

FOSCSEL: $F80006:$0003
Initial Oscillator Source Selection Bits (FNOSC)  : Primary Oscillator (XT, HS, EC) with PLL (= "011")
Two-speed Oscillator Start-up (IESO)              : Disabled (= "0")

FOSC: $F80008:$00A5
Primary Oscillator Mode (POSCMD)                  : XT Crystal Oscillator Mode (= "01")
OSC2 Pin Function (OSCIOFNC)                      : OSC2 is clock output (= "1")
Peripheral pin select configuration (IOL1WAY)     : Allow only one reconfiguration (= "1")
Clock Switching Modes (FCKSM)                     : Both Clock switching and Fail-safe Clock Monitor are disabled (= "10")

FWDT: $F8000A:$007F
Watchdog Timer Postscaler Bits (WDTPOST)          : 1:32,768 (= "1111")
Watchdog Timer Prescaler bit (WDTPRE)             : 1:128 (= "1")
PLL Lock Wait (PLLKEN)                            : Enabled (= "1")
Watchdog Timer Window (WINDIS)                    : Disabled (= "1")
Watchdog Timer (FWDTEN)                           : Disabled (= "0")

FPOR: $F8000C:$003F
Power-on Reset Timer Value (FPWRT)                : 128ms (= "111")
Brown-out Reset (BOR) Detection (BOREN)           : Enabled (= "1")
Alternate I2C pins for I2C1 (ALTI2C1)             : Disabled (= "1")
Alternate I2C pins for I2C2 (ALTI2C2)             : Disabled (= "1")

FICD: $F8000E:$00D7
ICD Communication Channel (ICS)                   : Communicate on PGEC1 and PGED1 (= "11")
Reset Target Vector (RSTPRI)                      : Device will obtain reset instruction from Primary flash (= "1")
... (ATMOD8)                                      : Disabled (= "1")
JTAG (JTAGEN)                                     : Disabled (= "0")
Debugger/Emulation Enable Bit (COE)               : Enabled (= "1")
Background Debug (BACKBUG)                        : Disabled (= "1")

FAS: $F80010:$0003
Auxiliary Segment Write-protect bit (AWRP)        : Disabled (= "1")
Auxiliary Segment Code-protect bit (APL)          : Disabled (= "1")
Auxiliary Segment Key bits (APLK)                 : Disabled (= "00")