STC micro STC8A8K64D4 Series - Page 600

STC8A8K64D4 Series Manual
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#define ESPI 0x02
sfr P0M1 = 0x93;
sfr P0M0 = 0x94;
sfr P1M1 = 0x91;
sfr P1M0 = 0x92;
sfr P2M1 = 0x95;
sfr P2M0 = 0x96;
sfr P3M1 = 0xb1;
sfr P3M0 = 0xb2;
sfr P4M1 = 0xb3;
sfr P4M0 = 0xb4;
sfr P5M1 = 0xc9;
sfr P5M0 = 0xca;
sbit SS = P1^0;
sbit LED = P1^1;
sbit KEY = P0^0;
void main()
{
P0M0 = 0x00;
P0M1 = 0x00;
P1M0 = 0x00;
P1M1 = 0x00;
P2M0 = 0x00;
P2M1 = 0x00;
P3M0 = 0x00;
P3M1 = 0x00;
P4M0 = 0x00;
P4M1 = 0x00;
P5M0 = 0x00;
P5M1 = 0x00;
LED = 1;
KEY = 1;
SS = 1;
SPCTL = 0x40; //Enable SPI slave mode and standby
SPSTAT = 0xc0; //Clear interrupt flag
while (1)
{
if (!KEY) //Wait for the key to trigger
{
SPCTL = 0x50; //Enable SPI master mode
SS = 0; //Pull down the slave SS pin
SPDAT = 0x5a; //Send test data
while (!KEY); //Wait for the keys to be released
}
if (SPSTAT & 0x80)
{
SPSTAT = 0xc0; //Clear interrupt flag
if (SPCTL & 0x10)
{ //Master mode
SS = 1; //Pull up the SS pin of the slave
SPCTL = 0x40; //Reset to slave and standby
}