Hello Alan
On 07/18/14 14:06, Alan Cudmore wrote:
Hi André,
I have a couple of SPI devices to try now. I have the SPI FRAM chip:
https://www.adafruit.com/product/1897
I have here a similar device
http://www.microchip.com/wwwproducts/Devices.aspx?product=23K256
Will try to test it with the PI this weekend.
I also have the following devices here:
(I2C) http://www.microchip.com/wwwproducts/Devices.aspx?product=MCP23008
(SPI)(I2C) http://www.newhavendisplay.com/nhd0216k3zflgbwv3-p-5738.html
and something that could be interesting, an SPI based LCD/touchscreen:
https://www.adafruit.com/products/1601
It does look interesting.
I can also verify that the RTEMS BSP works fine on the new Raspberry
Pi Model B+
Nice. By the way, currently the BSP does not recognize (or I have missed
it) which raspberry Pi version it is running on, and as new peripherals
are added to the BSP it becomes important to have that info. For
instance, the I2C interface on the P1 GPIO header uses different pin
numbers for model A and model B/B+.
Alan
On Sat, Jul 5, 2014 at 6:58 PM, Andre Marques
<andre.lousa.marq...@gmail.com <mailto:andre.lousa.marq...@gmail.com>>
wrote:
Hello,
The Raspberry Pi GPIO interrupts are already working, and a test
case is available to test that [1]. A function is also provided to
debounce a switch if needed. The test case requires two switches
and two LEDS using the same setup described at [2] by only
changing the pin numbers.
The test works by setting interrupts on both edges of the
switches, which handlers will turn on or off the corresponding
LED. One of the LEDs also has a level interrupt which prints a
message on the screen when the LED is on (high level).
While I wait for some feedback on that, I will be looking at the
next step: the I2C interface. To test both the I2C and the SPI
interfaces I have here a simple display [3]. The idea is to create
a low level driver for I2C to provide the needed directives for
the libi2c API, so the driver for the display will actually use
the libi2c API. Any thoughts here are welcome too!
Thanks,
André Marques.
[1] -
https://github.com/asuol/rtems/blob/GPIO_API/testsuites/samples/LIBGPIO_TEST_IQR/init.c
[2] -
http://asuolgsoc2014.wordpress.com/2014/06/22/testing-the-gpio-api/
[3] - http://www.newhavendisplay.com/nhd0216k3zflgbwv3-p-5738.html
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