unsigned char WriteSPIM( unsigned char data_out )
{
#ifdef __PIC32MX__
BYTE clear;
putcSPI((BYTE)data_out);
clear = getcSPI();
return ( 0 ); // return non-negative#
#elif defined __18CXX
BYTE clear;
clear = SPIBUF;
SPI_INTERRUPT_FLAG = 0;
SPIBUF = data_out;
if (SPICON1 & 0x80)
return -1;
else
while (!SPI_INTERRUPT_FLAG);
return 0;
#else
BYTE clear;
SPIBUF = data_out; // write byte to SSP1BUF register
while( !SPISTAT_RBF ); // wait until bus cycle complete
clear = SPIBUF;
return ( 0 ); // return non-negative#
#endif
}
void process_flash_read(void){
__xdata char msg[] = "?? ?? ?? ?? ?? ?? ?? ?? ";
BYTE i,d;
busy_polling();
FLASH_ENABLE; // assert chip select
putcSPI(SPI_READ); // send read command
putcSPI(flash_addr_h); // send high byte of address
putcSPI(flash_addr_m); // send high byte of address
putcSPI(flash_addr_l); // send low byte of address
for(i = 0; i < 8; i++){
d = getcSPI();
msg[i*3] = hex_char_h(d);
msg[i*3+1] = hex_char_l(d);
msg[i*3+2] = ' ';
}
FLASH_DISABLE; // negate chip select
if(flash_addr_l == (256 - 8)){
flash_addr_l = 0x00;
if(flash_addr_m == 0xFF)
flash_addr_h++;
flash_addr_m++;
}
else
flash_addr_l += 8;
print_ep6_string(msg);
}
// *------------------------------------------------------*
inline void __attribute__((always_inline)) vSPIPut(UINT8 data){
UINT8 clear;
putcSPI((UINT8)data);
clear = getcSPI();
return;
}
void getsSPI( unsigned char *rdptr, unsigned char length )
{
while ( length ) // stay in loop until length = 0
{
*rdptr++ = getcSPI(); // read a single byte
length--; // reduce string length count by 1
}
}
void process_flash_status(void){
BYTE sr1, sr2;
char msg[] = "SR1 ?? SR2 ??";
FLASH_ENABLE; // assert chip select
putcSPI(SPI_RDSR1); // Read Status Register 1
sr1 = getcSPI();
FLASH_DISABLE; // negate chip select
FLASH_ENABLE; // assert chip select
putcSPI(SPI_RDSR2); // Read Status Register 1
sr2 = getcSPI();
FLASH_DISABLE; // negate chip select
msg[4] = hex_char_h(sr1);
msg[5] = hex_char_l(sr1);
msg[11] = hex_char_h(sr2);
msg[12] = hex_char_l(sr2);
print_ep6_string(msg);
}
void process_flash_id(void){
BYTE mid, did, uid;
char msg[] = "IDCODE ??????";
busy_polling();
FLASH_ENABLE; // assert chip select
putcSPI(SPI_RDID); // get ID command
mid = getcSPI();
did = getcSPI();
uid = getcSPI();
FLASH_DISABLE; // negate chip select
msg[7] = hex_char_h(mid);
msg[8] = hex_char_l(mid);
msg[9] = hex_char_h(did);
msg[10] = hex_char_l(did);
msg[11] = hex_char_h(uid);
msg[12] = hex_char_l(uid);
print_ep6_string(msg);
//if((mid == 0xEF) && (did == 0x40) && (uid == 0x17))
// print_ep6_string("W25Q64FV");
//if((mid == 0x20) && (did == 0x20) && (uid == 0x16))
// print_ep6_string("M25P32");
}
void process_flash_erase(void){
BYTE status_reg = 1;
busy_polling();
FLASH_ENABLE; // assert chip select
putcSPI(SPI_WREN); // write status command
FLASH_DISABLE; // negate chip select
FLASH_ENABLE; // assert chip select
putcSPI(SPI_BE); // Bulk Erase command
FLASH_DISABLE; // negate chip select
while((status_reg & 0x01) != 0){// Pulling Flash Busy
FLASH_ENABLE; //assert chip select
putcSPI(SPI_RDSR1); //send read status command
status_reg = getcSPI(); //read data byte
FLASH_DISABLE; //negate chip select
}
print_ep6_string("Done");
}
/*****************************************************************************
Function:
BYTE MDD_SDSPI_ReadMedia (void)
Summary:
Reads a byte of data from the SD card.
Conditions:
None.
Input:
None.
Return:
The byte read.
Side Effects:
None.
Description:
The MDD_SDSPI_ReadMedia function will read one byte from the SPI port.
Remarks:
This function replaces ReadSPI, since some implementations of that function
will initialize SSPBUF/SPIBUF to 0x00 when reading. The card expects 0xFF.
***************************************************************************************/
BYTE MDD_SDSPI_ReadMedia(void)
{
#ifdef __C32__
putcSPI((BYTE)0xFF);
return (BYTE)getcSPI();
#elif defined __18CXX
BYTE clear;
clear = SPIBUF;
SPI_INTERRUPT_FLAG = 0;
SPIBUF = 0xFF;
while (!SPI_INTERRUPT_FLAG);
return SPIBUF;
#else
SPIBUF = 0xFF; //Data Out - Logic ones
while(!SPISTAT_RBF); //Wait until cycle complete
return(SPIBUF); //Return with byte read
#endif
}
// *------------------------------------------------------*
inline UINT8 __attribute__((always_inline)) uiSPIGet(void){
putcSPI((UINT8)0xFF);
return((UINT8)getcSPI());
}
