gpif.c

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// GPIF Program Code                          
                                              
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#include "fx2.h"                            
#include "fx2regs.h"                        
#include "fx2sdly.h"     // SYNCDELAY macro 
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const char xdata WaveData[128] =     
{                                      
// Wave 0 
/* LenBr */ 0x01,     0x01,     0x01,     0x01,     0x01,     0x01,     0x01,     0x07,
/* Opcode*/ 0x00,     0x00,     0x00,     0x00,     0x00,     0x00,     0x00,     0x00,
/* Output*/ 0x00,     0x00,     0x00,     0x00,     0x00,     0x00,     0x00,     0x00,
/* LFun  */ 0x00,     0x00,     0x00,     0x00,     0x00,     0x00,     0x00,     0x3F,
// Wave 1 
/* LenBr */ 0x01,     0x3F,     0x01,     0x01,     0x01,     0x01,     0x01,     0x07,
/* Opcode*/ 0x22,     0x03,     0x02,     0x02,     0x02,     0x02,     0x02,     0x00,
/* Output*/ 0x00,     0x01,     0x01,     0x01,     0x01,     0x01,     0x01,     0x00,
/* LFun  */ 0x00,     0x00,     0x00,     0x00,     0x00,     0x00,     0x00,     0x3F,
// Wave 2 
/* LenBr */ 0x01,     0x11,     0x01,     0x3F,     0x01,     0x01,     0x01,     0x07,
/* Opcode*/ 0x00,     0x03,     0x00,     0x01,     0x00,     0x00,     0x00,     0x00,
/* Output*/ 0x04,     0x04,     0x04,     0x00,     0x00,     0x00,     0x00,     0x00,
/* LFun  */ 0x00,     0x2D,     0x00,     0x2D,     0x00,     0x00,     0x00,     0x3F,
// Wave 3 
/* LenBr */ 0x01,     0x39,     0x01,     0x01,     0x01,     0x01,     0x01,     0x07,
/* Opcode*/ 0x00,     0x03,     0x02,     0x02,     0x02,     0x02,     0x02,     0x00,
/* Output*/ 0x00,     0x00,     0x00,     0x00,     0x00,     0x00,     0x00,     0x00,
/* LFun  */ 0x00,     0x2D,     0x00,     0x00,     0x00,     0x00,     0x00,     0x3F,
};                     
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const char xdata FlowStates[36] =   
{                                      
/* Wave 0 FlowStates */ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
/* Wave 1 FlowStates */ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
/* Wave 2 FlowStates */ 0x81,0x2D,0x26,0x00,0x04,0x04,0x03,0x02,0x00,
/* Wave 3 FlowStates */ 0x81,0x2D,0x21,0x00,0x04,0x04,0x03,0x02,0x00,
};                     
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const char xdata InitData[7] =                                   
{                                                                
/* Regs  */ 0xA0,0x00,0x00,0x00,0xEE,0x4E,0x00     
};                                                               
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// TO DO: You may add additional code below.

void GpifInit( void )
{
  BYTE i;
 
  // Registers which require a synchronization delay, see section 15.14
  // FIFORESET        FIFOPINPOLAR
  // INPKTEND         OUTPKTEND
  // EPxBCH:L         REVCTL
  // GPIFTCB3         GPIFTCB2
  // GPIFTCB1         GPIFTCB0
  // EPxFIFOPFH:L     EPxAUTOINLENH:L
  // EPxFIFOCFG       EPxGPIFFLGSEL
  // PINFLAGSxx       EPxFIFOIRQ
  // EPxFIFOIE        GPIFIRQ
  // GPIFIE           GPIFADRH:L
  // UDMACRCH:L       EPxGPIFTRIG
  // GPIFTRIG
  
  // Note: The pre-REVE EPxGPIFTCH/L register are affected, as well...
  //      ...these have been replaced by GPIFTC[B3:B0] registers
 
  // 8051 doesn't have access to waveform memories 'til
  // the part is in GPIF mode.
 
  IFCONFIG = 0xEE;
  // IFCLKSRC=1   , FIFOs executes on internal clk source
  // xMHz=1       , 48MHz internal clk rate
  // IFCLKOE=0    , Don't drive IFCLK pin signal at 48MHz
  // IFCLKPOL=0   , Don't invert IFCLK pin signal from internal clk
  // ASYNC=1      , master samples asynchronous
  // GSTATE=1     , Drive GPIF states out on PORTE[2:0], debug WF
  // IFCFG[1:0]=10, FX2 in GPIF master mode
 
  GPIFABORT = 0xFF;  // abort any waveforms pending
 
  GPIFREADYCFG = InitData[ 0 ];
  GPIFCTLCFG = InitData[ 1 ];
  GPIFIDLECS = InitData[ 2 ];
  GPIFIDLECTL = InitData[ 3 ];
  GPIFWFSELECT = InitData[ 5 ];
  GPIFREADYSTAT = InitData[ 6 ];
 
  // use dual autopointer feature... 
  AUTOPTRSETUP = 0x07;          // inc both pointers, 
                                // ...warning: this introduces pdata hole(s)
                                // ...at E67B (XAUTODAT1) and E67C (XAUTODAT2)
  
  // source
  AUTOPTRH1 = MSB( &WaveData );
  AUTOPTRL1 = LSB( &WaveData );
  
  // destination
  AUTOPTRH2 = 0xE4;
  AUTOPTRL2 = 0x00;
 
  // transfer
  for ( i = 0x00; i < 128; i++ )
  {
    EXTAUTODAT2 = EXTAUTODAT1;
  }
 
// Configure GPIF Address pins, output initial value,
  PORTCCFG = 0xFF;    // [7:0] as alt. func. GPIFADR[7:0]
  OEC = 0xFF;         // and as outputs
  PORTECFG |= 0x80;   // [8] as alt. func. GPIFADR[8]
  OEE |= 0x80;        // and as output
 
// ...OR... tri-state GPIFADR[8:0] pins
//  PORTCCFG = 0x00;  // [7:0] as port I/O
//  OEC = 0x00;       // and as inputs
//  PORTECFG &= 0x7F; // [8] as port I/O
//  OEE &= 0x7F;      // and as input
 
// GPIF address pins update when GPIFADRH/L written
  SYNCDELAY;                    // 
  GPIFADRH = 0x00;    // bits[7:1] always 0
  SYNCDELAY;                    // 
  GPIFADRL = 0x00;    // point to PERIPHERAL address 0x0000
 
// Configure GPIF FlowStates registers for Wave 0 of WaveData
  FLOWSTATE = FlowStates[ 0 ];
  FLOWLOGIC = FlowStates[ 1 ];
  FLOWEQ0CTL = FlowStates[ 2 ];
  FLOWEQ1CTL = FlowStates[ 3 ];
  FLOWHOLDOFF = FlowStates[ 4 ];
  FLOWSTB = FlowStates[ 5 ];
  FLOWSTBEDGE = FlowStates[ 6 ];
  FLOWSTBHPERIOD = FlowStates[ 7 ];
}