uchar SPI_Transmit_sw(uchar send_byte)
{
uchar rec_byte = 0;
uchar i;
for (i = 0; i < 8; i++)
{
// Transmit MSB first
if ((send_byte & 0x80) != 0)
{
SET_MOSI(); // Set MOSI high
}
else
{
CLR_MOSI(); // Set MOSI low
}
// Shift 2nd msb to msb
send_byte = send_byte << 1;
// Get data from MISO pin
rec_byte = rec_byte << 1;
if (GET_MISO())
{
rec_byte++;
}
// Pulse clock
SET_SCK();
ten_us_delay(sw_delay_time);
CLR_SCK();
ten_us_delay(sw_delay_time);
}
return rec_byte;
}
//egy bitet kiküld a ledmeghajtó SDI lábára
//b=0: low
//b!=0: high
static void send_one_bit(int b){
if(b) SET_SDI();
else CLR_SDI();
SET_SCK();
CLR_SCK();
}
