diff options
Diffstat (limited to 'c/src/lib/libbsp/arm/raspberrypi/README')
-rw-r--r-- | c/src/lib/libbsp/arm/raspberrypi/README | 65 |
1 files changed, 0 insertions, 65 deletions
diff --git a/c/src/lib/libbsp/arm/raspberrypi/README b/c/src/lib/libbsp/arm/raspberrypi/README deleted file mode 100644 index d0c32a748d..0000000000 --- a/c/src/lib/libbsp/arm/raspberrypi/README +++ /dev/null @@ -1,65 +0,0 @@ -BSP for the Raspberry Pi ARM board -This is a basic port that should work on either Model A or Model B. - -It currently supports the following devices: - o Console using the PL011 UART0 - The console driver only works with polled mode right now, - the interrupt code is there, but it does not work yet. - The console driver is currently hardcoded at 115k 8N1 - o Clock uses the internal ARM timer - The Raspberry Pi can be overclocked through the config.txt file, this - would affect the duration of the clock tick. - o Benchmark timer reads the lower 32 bit GPU timer register - -To run an RTEMS binary, it must be stripped and loaded on the SD card along with -the following files: - bootcode.bin - config.txt - loader.bin - start.elf - kernel.img ( the RTEMS binary, you can change the name in config.txt ) - -These files can be obtained from a Linux installation image, or from here: -https://github.com/raspberrypi/firmware - -I used an old 256MB SD card to boot RTEMS. -Much more information about the SD card file and bootloader can be found here: -http://elinux.org/RPi_Hub -http://www.raspberrypi.org - -The linker script is set up for 128MB, so it can be used with a GPU/ARM split -of 128/128. -The bootloader that is used on the SD card determines the split of RAM between the -ARM and the GPU. It might make sense to adjust the GPU/ARM memory split to give -more memory to RTEMS, especially on a 512MB board. - -To do: - It would be nice to get support in the BSP for the following: - o SD card - o USB and USB 10/100 network chip on Model B - o SPI - o GPIO - o ARM MMU - o Graphics console - o Sound - -Credits and links: - - There is a wealth of code and information to reference on the raspberrypi.org bare metal forums: - http://www.raspberrypi.org/phpBB3/viewforum.php?f=72 - - I found information about how to program the timers, interrupts, and UART 0 - from the examples provided by: - - David Welch: - https://github.com/dwelch67/raspberrypi - The readme file at his github repository has valuable information about connecting a UART cable, JTAG etc. - - Steve Bate: - http://www.stevebate.net/chibios-rpi/GettingStarted.html - Steve provided a port of the Chibios RTOS to the raspberry Pi - - James Walmsley: - http://www.raspberrypi.org/phpBB3/viewtopic.php?f=72&t=22423 - James ported FreeRTOS to the raspberry Pi. - |