This disables changing pinmux as this is envisioned to be done through acpi
provided by u-boot
Signed-off-by: Ferry Toth <ftoth@exalondelft.nl>
Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>
This adds logic to save PWM duty when disabling the pin (which sets
the duty to 0), and restore it when re-enabling the pin.
Signed-off-by: Alex Tereschenko <alext.mkrs@gmail.com>
Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>
Edison pwm can stuck at high if pin is disabled during ON pwm peroid.
Workaround is to force zero duty time before disabling the pin.
Signed-off-by: Billy Bai <belugon@outlook.com>
Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>
As described in issue #91, on Edison setting 0% duty doesn't
disable the PWM on a pin completely.
Therefore we add a couple of Edison-specific _pre functions
and an internal PWM state variable, which we use to toggle PWM
enabled/disabled based on what duty is set for the pin.
Closes#91.
Signed-off-by: Alex Tereschenko <alext.mkrs@gmail.com>
Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>
mraa_intel_edison_misc_spi is specific to the Arduino board.
Call it only when miniboard is not 1.
Signed-off-by: Constantin Musca <constantin.musca@intel.com>
Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>
Move mraa_intel_edison_misc_spi to mraa_intel_edison_spi_init_pre.
There is no point in initializing SPI if it's not used.
Set the direction of GPIO 214 (TRI_STATE_ALL) only if it's not set
to *out*.
Signed-off-by: Constantin Musca <constantin.musca@intel.com>
Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>
Switch to using calloc on all calls to malloc where the memory isn't
initialized. For things like the mraa_board_t, not allocating all to zero
causes issues such as with the sub_platform member, where if that's not zero
mraa_get_platform_type will try to dereference a random memory location for the
sub_platform->platform_name, which can result in segmentation faults and other
issues.
Note that in some places where immediately after the malloc call is a copy
operation, there is no need for calloc, as all the memory gets overwritten
anyways, but in cases where there may or may not be memory written to (such as
in mraa_file_contains, with reading from a file), even though in most cases the
memory is overwritten, it could be the case that the read operation does
nothing, but the memory still has non-zero values, by virtue of the fact it
wasn't overwritten.
Signed-off-by: Ian Johnson <ijohnson@wolfram.com>
Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>
Since on most 3rd party breakout boards the i2c bus exposed is 1 and not 6, it
makes more sense to have that as the default i2c bus
Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>
The MRAA library needs the debugfs interface in order to access GPIO
pin modes attributes. Mounting the debugfs is not always desirable so this
patch instructs libmraa to first check for the required attributes in
the normal SYSFS CLASS GPIO interface and to use debugfs as a fallback.
Signed-off-by: Mihai Serban <mihai.serban@intel.com>
Signed-off-by: Constantin Musca <constantin.musca@intel.com>
Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>
Calling mraa_intel_edison_misc_spi() is not really needed, because the
GPIO 10..13 pins will be configured correctly when the user actually
inits them as GPIO pins. When using these pins for GPIO,
mraa_setup_mux_mapped() and mraa_intel_edison_gpio_init_post() will do
all this work based on the pin map and pinmodes for the Edison Arduino
board.
On the contrary, this function would break any user of the SPI bus
that is already running.
Signed-off-by: Jonas Norling <jonas.norling@connode.com>
Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>
Edison SPI driver doesn't support LSB_FIRST mode, we will now return
_FEATURE_NOT_SUPPORTED instead of _INVALID_RESOURCE
for attempts to enable it.
Closes#22.
Signed-off-by: Alex Tereschenko <alext.mkrs@gmail.com>
Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>
Gpio 111 controls the use of hardware CS by the edison kernel's SPI driver.
This is an issue as that CS will go high between every byte transmitted. The
solution is to let gpio 111 alone and let the driver decide what is best. This
fixes#137
Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>
This reworks the mraa_intel_edison_i2c_freq() function. i2c_dw_sysnode is a
folder not a file so we need to grab the mode file from that folder. We now
also support i2c-1 frequency changing
Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>
Instead of plain char* to avoid need to malloc and do all the needed
error checking needed that goes along with that.
Signed-off-by: Thomas Ingleby <thomas.c.ingleby@intel.com>
Used for getting the path to the character device under linux for uart
device. i.e. "/dev/ttyS0"
Adds paths to existing platforms.
Closes#84
Signed-off-by: Thomas Ingleby <thomas.c.ingleby@intel.com>
The gpio_close_pre was put on the wrong board definition. So calling close of
GPIO pin on mini-board caused a fault
Signed-off-by: Kurt Eckhardt <kurte@rockisland.com>
Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>
