Hello! I am sorry English is not my mother tongue!
I use TNT4882 chip for GPIB support implementation and AT89S52 for control. I use generic pin
configuration to access TNT4882-AQ. The tnt not seems to work. I do not know if the problem is hardware
or software problems. Who can help me? You can see the pin configuration on the attachment.Here is the
initialization code:
void main(void)
{
MCU_Init();
TNT_RST = 0;
delay();
TNT_RST = 1;
delay();
CMDR = 0x22; //soft reset
SPMR = 0x80; //place chip in turbo+7210 mode
AUXMR = 0x80;
SPMR = 0x99;
AUXMR = 0x99;
KEYREG = 0x00; //0x00 to KEYREG
HSSEL = 0x01; //put in one-chip mode
AUXMR = 0x02; //assert local pon message
ADMR = 0x31; //dual primary addressing mode
ADR = 0x01; //set primary GPIB address as 1
ADR = 0xE0; //disable secondary address
AUXMR = 0x00; //clear local power-on message
SBUF = XBYTE[0x00];
while (!TI);
TI = 0;
SBUF = XBYTE[0x01];
while (!TI);
TI = 0;
SBUF = XBYTE[0x02];
while (!TI);
TI = 0;
SBUF = XBYTE[0x03];
while (!TI);
TI = 0;
SBUF = XBYTE[0x04];
while (!TI);
TI = 0;
SBUF = XBYTE[0x05];
while (!TI);
TI = 0;
SBUF = XBYTE[0x06];
while (!TI);
TI = 0;
SBUF = XBYTE[0x07];
while (!TI);
TI = 0;
SBUF = XBYTE[0x08];
while (!TI);
TI = 0;
SBUF = XBYTE[0x09];
while (!TI);
TI = 0;
SBUF = XBYTE[0x0A];
while (!TI);
TI = 0;
SBUF = XBYTE[0x0B];
while (!TI);
TI = 0;
SBUF = XBYTE[0x0C];
while (!TI);
TI = 0;
SBUF = XBYTE[0x0D];
while (!TI);
TI = 0;
SBUF = XBYTE[0x0E];
while (!TI);
TI = 0;
SBUF = XBYTE[0x0F];
while (!TI);
TI = 0;
SBUF = XBYTE[0x10];
while (!TI);
TI = 0;
SBUF = XBYTE[0x11];
while (!TI);
TI = 0;
SBUF = XBYTE[0x12];
while (!TI);
TI = 0;
SBUF = XBYTE[0x13];
while (!TI);
TI = 0;
SBUF = XBYTE[0x14];
while (!TI);
TI = 0;
SBUF = XBYTE[0x15];
while (!TI);
TI = 0;
SBUF = XBYTE[0x16];
while (!TI);
TI = 0;
SBUF = XBYTE[0x17];
while (!TI);
TI = 0;
SBUF = XBYTE[0x18];
while (!TI);
TI = 0;
SBUF = XBYTE[0x19];
while (!TI);
TI = 0;
SBUF = XBYTE[0x1A];
while (!TI);
TI = 0;
SBUF = XBYTE[0x1B];
while (!TI);
TI = 0;
SBUF = XBYTE[0x1C];
while (!TI);
TI = 0;
SBUF = XBYTE[0x1D];
while (!TI);
TI = 0;
SBUF = XBYTE[0x1E];
while (!TI);
TI = 0;
SBUF = XBYTE[0x1F];
while (!TI);
TI = 0;
while (1);
}
Here is the data which i read from all TNT4882 registers after the initialization, somebody can see
wrong values?
Reg: 0x00 -> Val: 0x00
Reg: 0x01 -> Val: 0xFF
Reg: 0x02 -> Val: 0x00
Reg: 0x03 -> Val: 0xFF
Reg: 0x04 -> Val: 0x00
Reg: 0x05 -> Val: 0xFF
Reg: 0x06 -> Val: 0x00
Reg: 0x07 -> Val: 0xFF
Reg: 0x08 -> Val: 0x00
Reg: 0x09 -> Val: 0xFF
Reg: 0x0A -> Val: 0x00
Reg: 0x0B -> Val: 0xFF
Reg: 0x0C -> Val: 0x00
Reg: 0x0D -> Val: 0xFF
Reg: 0x0E -> Val: 0x00
Reg: 0x0F -> Val: 0xFF
Reg: 0x10 -> Val: 0x00
Reg: 0x11 -> Val: 0x00
Reg: 0x12 -> Val: 0x00
Reg: 0x13 -> Val: 0x00
Reg: 0x14 -> Val: 0xFF
Reg: 0x15 -> Val: 0x3C
Reg: 0x16 -> Val: 0xFF
Reg: 0x17 -> Val: 0x3C
Reg: 0x18 -> Val: 0x19
Reg: 0x19 -> Val: 0x00
Reg: 0x1A -> Val: 0x19
Reg: 0x1B -> Val: 0x00
Reg: 0x1C -> Val: 0x00
Reg: 0x1D -> Val: 0x00
Reg: 0x1E -> Val: 0x00
Reg: 0x1F -> Val: 0x00
Through those values,it simply does not work. I suspect my TNT4882 bad. Thinks!
