8.2.1. altera-cyclone-v (Intel Cyclone V)¶

This BSP offers only one variant, the altcycv_devkit. This variant supports the Intel Cyclone V system on chip. The basic hardware initialization is not performed by the BSP. A boot loader with device tree support must be used to start the BSP, e.g. U-Boot.

The BSP is known to run on these boards:

8.2.1.1. Boot via U-Boot¶

The application executable file (ELF file) must be converted to an U-Boot image. Use the following commands:

arm-rtems6-objcopy -O binary app.exe app.bin
gzip -9 -f -c app.bin > app.bin.gz
mkimage -A arm -O linux -T kernel -a 0x00300000 -e 0x00300000 -n RTEMS -d app.bin.gz app.img

Use the following U-Boot commands to boot an application via TFTP download:

tftpboot ${loadaddr} app.img && run loadfdt && bootm ${loadaddr} - ${fdt_addr} ; reset

The loadfdt command may be not defined in your U-Boot environment. Just replace it with the appropriate commands to load the device tree at ${fdt_addr}.

8.2.1.2. Clock Driver¶

The clock driver uses the Cortex-A9 MPCore Global Timer.

8.2.1.3. Console Driver¶

The console driver supports up to two on-chip NS16550 UARTs. The console driver does not configure the pins.

8.2.1.4. I2C Driver¶

There is a legacy I2C driver. It should be converted to the I2C driver framework.

8.2.1.5. Network Interface Driver¶

The network interface driver is provided by the libbsd. It is initialized according to the device tree. It supports checksum offload.

8.2.1.6. MMC/SDCard Driver¶

The MMC/SDCard driver is provided by the libbsd. It is initialized according to the device tree. Pin re-configuration according to the serial clock frequency is not supported. DMA transfers are supported.

8.2.1.7. USB Host Driver¶

The USB host driver is provided by the libbsd. It is initialized according to the device tree. The driver works in polled mode.

8.2.1.8. Caveats¶

The clock and pin configuration support is quite rudimentary and mostly relies on the boot loader.