spi zynq

[Ram]

how many bits we can transmit or receive at a time while using spi communication in zynq 

or how many bits shift  register can stored in master and slave , like 8-bits, 16-bits, 32-bits ..

 

thanks 

ram

[jpeyron]

Hi @Ram,

On page 11 of the AXI Quad SPI v3.2 LogiCORE IP Product Guide  in section Optional FIFOs discusses shift registers with the AXI quad SPI IP Core.

cheers,

Jon

[Ram]

hi,@jon

can you please tell me , the meaning of this code,,, actually this code exist for ethernet , by this code when we send hex code from hercules utility terminal from pc , then led will be on zybo board

void set_led(char cmd[4])
{
    uint8_t led_value = 0;

    // translate command to led value

    led_value = (cmd[0] == '1') ?
            (led_value | (1 << 3)) : (led_value & ~(1 << 3));

    led_value = (cmd[1] == '1') ?
                (led_value | (1 << 2)) : (led_value & ~(1 << 2));

    led_value = (cmd[2] == '1') ?
                (led_value | (1 << 1)) : (led_value & ~(1 << 1));

    led_value = (cmd[3] == '1') ?
                (led_value | (1 << 0)) : (led_value & ~(1 << 0));

    xil_printf("LED value = %\n", led_value);

    // write led value to AXI GPIO

    XGpio_DiscreteWrite(& led, 1, led_value);

}

[jpeyron]

Hi @Ram,

This code looks like it takes the 4 bit cmd input and blinks the LEDs  if the bit is set to 1 otherwise the LED stays off.

thank you,

Jon

[Ram]

On 8/7/2018 at 4:00 AM, jpeyron said:

Hi @Ram,

This code looks like it takes the 4 bit cmd input and blinks the LEDs  if the bit is set to 1 otherwise the LED stays off.

thank you,

Jon

Hi,jon

can you explain this code in more detail ,, it is like command line argument

Thank-you

Ram

[JColvin]

Hi @Ram,

Check out this page to get an idea of what each of the operators do. In general it says if a statement is true, do the statement before the ":", if not true, do the statement after the ":".

Thanks,
JColvin