Форум РадиоКот

Код: Выделить всё

#define RDY     PORTC.4 //27 out
#define SCK     PORTC.2 //25 out
#define DAT     PORTC.0 // 23 in/out
#define INDAT     PINC.0//  23
#define DAT_DDR DDRC.0 // 23
#define EN      PORTC.5 //28   out
#define PSB     PORTD.1  //3 out
#define INT     PIND.2  // 4 in
//#define DRSSI   PIND.6

flash unsigned char regs[25]={
0xA8,// 0x28 T/R Channel index
0x03,// Crystal Frequency and RF Power
0x78,// Data Function Control
0x87,// RSSI Function Control
0x20,// RSSI Value
0x0F,// Data format control
0x30,// Multi Burst Packet Repeat Control
0x21,// Power Ramp Control
0x03,// Addres Length
0x02,// Destination Addres 0x34
0x02,// Destination Addres 0x22
0x02,// Destination Addres 0x55
0x00,// Destination Addres
0x00,// Destination Addres
0x01,// Device Addres
0x01,// Device Addres
0x01,// Device Addres
0x00,// Device Addres
0x00,// Device Addres
0x00,// Reserved
0x00,// PLL Pre-Turn-On Time
0xB4,// PLL Lock Time
0x00,// Reserved
0x22,// Option
0x04 // RX Turn On Time
}  ;


void spi_access_mode(void)
{
DAT=1;
PSB=1;
EN=1;
RDY=0;
SCK=0; 
#asm("nop")
};

void active_mode(void)
{
DAT=1;
PSB=1;
EN=0;
SCK=0;
RDY=1; 
#asm("nop")

};

// Output eight-bit value using selected bit-bang pins
void spi_bitbang_out(char value)
{
  char x;
  for(x=8;x>0;x--){
    if(value & 0x80)DAT=1;                                    
    else DAT=0;
    #asm("nop")
    SCK=1;
    value<<=1;
    #asm("nop")
    SCK=0;
    #asm("nop")
    }
}  ;

// Input eight-bit value using selected bit-bang pins
char spi_bitbang_in()
{
  unsigned char x=0;
  unsigned char y;
        x=0;
  for(y=8;y>0;y--){
    SCK=1;
    #asm("nop")
    x<<=1;
    if(INDAT==1){x|=0b00000001;} 
    SCK=0;
    #asm("nop")
    
    }                                         // Store next bit
  return(x);
} 

void spi_write_regs(unsigned char addres,unsigned char data)
{
spi_access_mode();
DAT_DDR=1;                                 
    spi_bitbang_out(addres|0x80);            // Send address
    spi_bitbang_out(data);                   // Send data
    EN=0;          
} ;         
 
unsigned char spi_read_reg(unsigned char addres)
{  unsigned char data;
spi_access_mode();
DAT_DDR=1;                                 
    spi_bitbang_out(addres);                  // Send address
DAT_DDR=0;                                 
   data=spi_bitbang_in();                    //read data
    EN=0;  
    return(data);
};  


void tr24f_init(void)
{unsigned char  y;
for(y=0;y<24;y++)
spi_write_regs(y,regs[y]);
};

unsigned char *fifo_read(unsigned char data_length)
{unsigned char *data, y;
active_mode();
DAT_DDR=0;
for(y=data_length;y>0;y--)
data[y]=spi_bitbang_in();
return(data);
};

void fifo_write(unsigned char *data,unsigned char data_length)
{
unsigned char y;
active_mode();
DAT_DDR=1;    
delay_us(20);
spi_bitbang_out(regs[0x09]);
spi_bitbang_out(regs[0x0A]);
spi_bitbang_out(regs[0x0B]);
for(y=data_length;y>0;y--)
spi_bitbang_out(data[y]); 
spi_bitbang_out(1); 
spi_bitbang_out(1); 
spi_bitbang_out(1); 
RDY=0;
};