#QSPI CONTROLLER CODE#

but i am unable to get the ID CODE in quad mode it is showing all FF. then flash memory will be configured in quad mode and we have to configure the controller in quad mode.ДЇor basic testing i was just trying to READ ID code in quad mode by sending command 0XAF in quad mode. before that we have to send write enable command 0x06. it says by default QSPI flash memory is in single mode to activate in quad mode.ДЇirst we configure the QSPI controller in default mode and then we have to write 0x7F in enhanced volatile configuration register with command of 0ењ†1. In vcu118 kit we have Micron MT25Q flash memory, i can able to read and write in single extended mode.

#QSPI CONTROLLER DRIVER#

i have QSPI controller using basic device driver i am trying to read and write the data in quad mode. If you fail to enable the User mode SPI support then the SPI device files will not be created.Д®dit the file subsystems/linux/configs/device-tree/system-top.dts in your PetaLinux project directory, then add the following lines.I am using vcu118 kit, i am trying to access QSPI flash present in it. Navigate to Device Drivers-> SPI support and make sure that Cadence SPI controller, Xilinx SPI controller command module, Xilinx Zynq QSPI controller, and User mode SPI device driver support are all enabled. Therefore there is a need for each family of flash devices to be tested and validated individually to confirm compatibility with Intel Stratix 10. To configure the kernel run the following command. The standard for QSPI flash devices has a lot of variability, and the QSPI flash controller has some limitations.

Then you need to enable SPI support for your kernel. The first step after creating your project is to use petalinux-config to read theВ hardware description that you exported from Vivado. This step is critical: without it, Linux wonвЂ™t create the SPI device file to control your device.

Before you build PetaLinux, though, you need to modify the device tree to create the appropriate device file for your SPI device. You need to create a PetaLinux project and extract the hardware description from your project SDK directory as discussed in tutorial 23. These steps are covered in other tutorials, so I wonвЂ™t go into details here. The core operates in various data modes from 4 bits to 32 bits (8 modes are supported in multiples of 4 data bits). Reading and writing the core is done on the AMBA AHB bus interface.

#QSPI CONTROLLER SOFTWARE#

Generate a bitstream and export your design to SDK. The IPC-QSPI-AHB bus controller can be configured under software control to be a master component or slave component device. Now synthesize the design and use the I/O Planner to place the outputs where you want on your FPGA. This can be really useful for debugging your software using the embedded logic analyzer feature of Vivado. Note that I have also marked the pins for debug. DonвЂ™t worry about not having those in your design. On my FPGA, I also connect to a DS3231 realtime clock over I2C and have some GPIOs connected as well. Wire that to the SPI0_SS_I pin on the ARMВ processor. To do this, instantiate a constant IP module and set the value to 1. Also, the SPI0_SS_I pin must be connected to a logic 1 value due to a bug in the toolchain. Note: there will be many unused pins, since the controller can be used as a master, slave, or both. Wire them up to the corresponding pin on the SPI controller. In my case I am connecting to a MAX 5216 DAC which does not have read capability so I only have three output pins which I call MAX5216_SCLK, MAX5216_MOSI, and MAX5216_SSN. If you wish to read from the SPI device, youвЂ™ll also need a data input.

For a SPI master, youвЂ™ll need at least one chip select output, one clock output, and probably a data output to write to the SPI device. Next, youвЂ™re going to need to make ports on the FPGA which will connect to the SPI controller. This programs the SPI control signals to use the Programmable Logic rather than pins dedicated to the Processor Subsystem. In the IO column make sure that EMIO is selected. Expand the I/O Peripherals section and scroll down to SPI 0. Next, go to the MIO Configuration section of the Page Navigator. Click on the Peripheral I/O Pins section of the Page Navigator and check the box next to SPI 0.В Note that Quad SPI or QSPI is unrelated to this discussion. This will bring up the IP configuration window. Double-click on the ZYNQ processing subsystem in your Block Design in the IP Integrator window. Enabling the SPI controllerДЇirst you need to enable the SPI controller on the ZYNQ subsystem. For this tutorial I am using Vivado 2016.2 and PetaLinux 2016.2.

In this tutorial, weвЂ™ll do things the вЂњofficialвЂќ way, and use the one of the hard IPВ SPI controllers present on the ZYNQ chip. In T utorial 24, I covered controlling a SPI device by just taking control of the memory mapped GPIO and bit-banging the SPI without a driver.

Qspi controller