Z-turn Board

The FPGA program is saved in RAM. Every time you need to download it again when power on. Here we use Platform Cable USB DLC9 to download. The Vivado version is 2014.4. The Z-turn Board JTAG interface can be used download and debug ARM and FPGA programs. ARM and FPGA are concatenated at the same JTAG interface, they are distinguished through ID numbers. The JTAG interface pinouts are as below:

GND can connect only one and NTRST no needs to be connected.

Before the development board power on, the JTAG emulator indicator is red, after power on, the indicator is green.

1. Use vivado 2014.4 to open the mys-xc7z010-trd project, click Program and Debug ->Open Hardware Manager -> Open Target->OpenNew Target on the left Flow Navigator

2. Click Next in pop-up Open New Hardware Target window until the diagram “SelectHardware Target” appears.

Select xc7z010_1 under HardwareDevice, click Next->Finish.

3. After then the Hardware Manager window will open automatically. Click program device->xc7z010_1 on the window, click Program in pop-up Program Device diagram to download program.

4. After that the downloadgrogress bar will appear.

After downloading successfully, the D25 on the board will flick on. Please dial the U20 switch 4 to L, the switch 1, 2 and 3 can control the RGB LED D34.

The JTAG interface is connected to CPU directly; there are no any components between them. If you cannot download, please check:

1)  If the JTAG emulator and Z-turn board well connected;

2)  If the JTAG emulator can be recognized at the PC terminal;

3)  If the JTAG emulator status LED is green after the development power on;

The SPI resource is as below:

Kernel Modification
Device tree has added spidev device and the kernel has modified the configuration option:
[mw_shl_code=bash,true]Device Drivers->SPI support->[/mw_shl_code]
Select User mode SPI device driver support
spi device node is at: /dev/spidev1.0
After selected this option, the spi device driver can be realized in user space. Please find relative material on net or refer to the source code: drivers/spi/spidev.c
The spi source code is at: drivers/spi/spi-cadence.c

Device tree modification

The device tree has modified two places.
The first place is as below:
[mw_shl_code=c,true]aliases {
                ethernet0 = &gem0;
                serial0 = &uart1;
                serial1 = &uart0;
                spi0 = &qspi;
                spi1 = &spi1;              // added this row
        };[/mw_shl_code]

The second place has added the spi definition.
[mw_shl_code=c,true]&spi1 {
        status = "okay";
        num-cs = <1>;
        spidev@0 {
            compatible = "spidev";
            reg = <0>;
            spi-max-frequency = <50000000>;
            //spi-cpha;
           //spi-cpol;
    };
};[/mw_shl_code]
Enclosed herewith the compiled kernel, device tree file package as below:

• uImage: kernel image
• devicetree.dtb: device tree image (binary)
• zynq-zturn.dts: device tree source file

z-turn_spi1.zip