Commit Graph

166 Commits

Author SHA1 Message Date
Gregory Nutt
9568600ab1 Squashed commit of the following:
This commit backs out most of commit b4747286b1.  That change was added because sem_wait() would sometimes cause cancellation points inappropriated.  But with these recent changes, nxsem_wait() is used instead and it is not a cancellation point.

    In the OS, all calls to sem_wait() changed to nxsem_wait().  nxsem_wait() does not return errors via errno so each place where nxsem_wait() is now called must not examine the errno variable.

    In all OS functions (not libraries), change sem_wait() to nxsem_wait().  This will prevent the OS from creating bogus cancellation points and from modifying the per-task errno variable.

    sched/semaphore:  Add the function nxsem_wait().  This is a new internal OS interface.  It is functionally equivalent to sem_wait() except that (1) it is not a cancellation point, and (2) it does not set the per-thread errno value on return.
2017-10-04 15:22:27 -06:00
Gregory Nutt
42a0796615 Squashed commit of the following:
sched/semaphore:  Add nxsem_post() which is identical to sem_post() except that it never modifies the errno variable.  Changed all references to sem_post in the OS to nxsem_post().

    sched/semaphore:  Add nxsem_destroy() which is identical to sem_destroy() except that it never modifies the errno variable.  Changed all references to sem_destroy() in the OS to nxsem_destroy().

    libc/semaphore and sched/semaphore:  Add nxsem_getprotocol() and nxsem_setprotocola which are identical to sem_getprotocol() and set_setprotocol() except that they never modifies the errno variable.  Changed all references to sem_setprotocol in the OS to nxsem_setprotocol().  sem_getprotocol() was not used in the OS
2017-10-03 15:35:24 -06:00
Gregory Nutt
83cdb0c552 Squashed commit of the following:
libc/semaphore:  Add nxsem_getvalue() which is identical to sem_getvalue() except that it never modifies the errno variable.  Changed all references to sem_getvalue in the OS to nxsem_getvalue().

    sched/semaphore:  Rename all internal private functions from sem_xyz to nxsem_xyz.  The sem_ prefix is (will be) reserved only for the application semaphore interfaces.

    libc/semaphore:  Add nxsem_init() which is identical to sem_init() except that it never modifies the errno variable.  Changed all references to sem_init in the OS to nxsem_init().

    sched/semaphore:  Rename sem_tickwait() to nxsem_tickwait() so that it is clear this is an internal OS function.

    sched/semaphoate:  Rename sem_reset() to nxsem_reset() so that it is clear this is an internal OS function.
2017-10-03 12:52:31 -06:00
Juha Niskanen
0113b0db95 drivers: handle I2C_TRANSFER return value consistently. Some I2C peripherals transfers return zero on success, others number of completed transfers. Make drivers robust against this. 2017-08-04 07:31:36 -06:00
Gregory Nutt
95e20afcd2 drivers/: Remove dangling space at the end of lines. 2017-06-28 13:17:17 -06:00
Mark Schulte
b3222bbc8a irq_dispatch: Add argument pointer to irq_dispatch
Provide a user defined callback context for irq's, such that when
registering a callback users can provide a pointer that will get
passed back when the isr is called.
2017-02-27 06:27:56 -06:00
Marc Rechté
58c2cd2843 drivers/ioexpander: Add some debug output. 2016-11-08 07:46:25 -06:00
Gregory Nutt
9965cbe428 drivers/: Review and correct some stylistic inconsistencies 2016-08-07 09:43:48 -06:00
Gregory Nutt
3d5df2e5af Extend I/O Expander interrupt controls; Add test of level sensitve interrupt to Simulated I/O expander 2016-08-04 16:19:52 -06:00
Gregory Nutt
1f9799b68d I/O Expanders: Interrupt detection logic should not ignore the no-change case. Still need to handle level interrupts even with no change. 2016-08-03 13:10:20 -06:00
Gregory Nutt
803b540e8a Fix various issues with I/O expander and GPIO lower half drivers from testing with simulated I/O expander 2016-08-03 12:46:54 -06:00
Gregory Nutt
778a8131bf SIM: Add a simulated I/O Expander driver 2016-08-03 09:44:48 -06:00
Gregory Nutt
62bc64bc55 Back out last Makefile.unix change. After puzzling about this for a while, I moved the definitions to apps/Make.defs. Also includes some cosmetic changes to GPIO lower half driver comments. 2016-08-02 08:37:30 -06:00
Gregory Nutt
9685fd8c99 GPIO driver: Add an IOCTL to unregister a signal handler 2016-08-01 13:52:27 -06:00
Gregory Nutt
0f9fb09a53 GPIO driver: Add an IOCTL command to get the pin type 2016-08-01 12:09:00 -06:00
Gregory Nutt
d0f6a23a32 Ooops.. forgot to add files before last commit 2016-08-01 11:15:29 -06:00
Gregory Nutt
d47aa75669 Add PCF8574 I/O Expander driver. Some cleanup also of other expander drivers. 2016-08-01 11:10:11 -06:00
Gregory Nutt
e0f3df5d97 Remove another lingering kruft 2016-08-01 10:01:28 -06:00
Gregory Nutt
583dad647c TCA64xx: Remove some unused kruft 2016-08-01 09:59:36 -06:00
Gregory Nutt
9d9ff44736 GPIO lower half: Add conditional logic to handle the case where the I/O expander does not support interrupts. 2016-08-01 09:06:58 -06:00
Gregory Nutt
bf60f11801 Remove some unnecessary header file inclusions 2016-08-01 08:55:13 -06:00
Gregory Nutt
3e79ffc6dd Some updates to the last commit 2016-08-01 08:49:15 -06:00
Gregory Nutt
6090f69bfd Add a GPIO lower-half driver that can be used to register a GPIO character driver for accessing pins on an I/O expander. 2016-08-01 08:43:10 -06:00
Gregory Nutt
91b1006d42 I/O Expander Interface: Add argument to interrupt callback. Add a method to detach the interrupt. 2016-08-01 07:26:04 -06:00
Gregory Nutt
fb84e51d5b Minor improvements/fixes to the TCA64xx driver. 2016-08-01 06:48:05 -06:00
Gregory Nutt
c0b83cb4b4 First (untested) cut at a TCA64XX I/O Expander driver leverages from Project Ara 2016-07-31 19:52:44 -06:00
Gregory Nutt
8fab9fb00f Rethink last commit -- probably going down the wrong path 2016-07-31 18:33:04 -06:00
Gregory Nutt
8a67509b34 I/O Expander: Encode and extend I/O expander options to include interrupt configuration. 2016-07-31 18:19:59 -06:00
Gregory Nutt
9f00d87c07 Another update to the I/O Expander skeleton.c file 2016-07-31 17:03:25 -06:00
Gregory Nutt
bbe7a97685 Remove a duplicated line 2016-07-31 16:41:12 -06:00
Gregory Nutt
b98a966135 Another update to the I/O Expander skeleton.c file 2016-07-31 16:39:44 -06:00
Gregory Nutt
c6d65b0943 Update I/O Expander skeleton.c file 2016-07-31 15:43:36 -06:00
Gregory Nutt
99843fe5fe I/O Expander: Update skelton file 2016-07-31 14:42:30 -06:00
Gregory Nutt
becf7e70c4 Add an I/O Expander skelton driver 2016-07-31 11:52:59 -06:00
Gregory Nutt
5f9ee79298 I/O Expander: Remove hard-coded PCA9555 fields from ioexpander.h definitons. Add support for an attach() method that may be used when any subset of pin interrupts occur.
PCA9555 Driver:  Replace the signalling logic with a simple callback using the new definitons of ioexpander.h.  This repartitioning of functionality is necessary because (1) the I/O expander driver is the lower-lower part of any driver that uses GPIOs (include the GPIO driver itself) and should not be interacting directly with the much higher level application layer.  And (2) in order to be compatible with the GPIO driver (and any arbitrary upper half driver), the PCA9555 should not directly signal, but should call back into the upper half.  The upper half driver that interacts directly with the application is the appropriate place to be generating signal.
2016-07-31 11:09:47 -06:00
Gregory Nutt
eb94cc5419 Update some comments 2016-07-24 12:48:37 -06:00
Gregory Nutt
2d92bffdcc Trivial change left in editor 2016-07-23 13:53:37 -06:00
Gregory Nutt
a932578e76 GPIO driver: Add support for receiving signals from interrupt pins. 2016-07-23 13:53:06 -06:00
Paul A. Patience
0690391d42 ioexpander/gpio: Add missing argument to gpin_read and gpout_read 2016-07-05 15:55:16 -04:00
Michael Spahlinger
3d5e690977 Shadow-Mode: The output- and configuration registers of the IO-Expander
are held in the microcontrollers memory and only written to the IO-Expander.
 This reduces bus traffic and is more error-proof than the normal read-
 modify-write operation.

 Retry Mode: If enabled and an error occurs while writing to the IO-Expander the
 current transmission is automatically repeated once.
2016-06-27 08:11:54 -06:00
Gregory Nutt
b16fdaf155 Some small improvements to GPIO driver 2016-06-26 11:24:35 -06:00
Gregory Nutt
db50f13511 Correct some typos in DEBUGASSERT statements 2016-06-24 14:34:21 -06:00
Gregory Nutt
20708c7c5e GPIO driver: Fix inconsistency in naming; beef up a debug assertion. 2016-06-24 11:32:24 -06:00
Gregory Nutt
ae19ca45e0 drivrs/ioexpander: Add support for a very simple GPIO drivers. It supports only pre-conrigured input and output pins and only basic input and output operations. 2016-06-24 09:43:49 -06:00
Sebastien Lorquet
9fd3db6293 PCA9555: Fix condition where GPIO interrupt is not re-enabled. 2016-04-20 09:59:16 -06:00
Frank Benkert
35df528f69 PCA9555: Remove duplicate variable declaration 2016-02-23 07:33:52 -06:00
Gregory Nutt
cea3854dea PCA5555: Add logic to make the driver thread safe. Problem noted by Stefan Kolb. 2016-02-03 12:39:11 -06:00
Gregory Nutt
e5d86dd3fc Oops. Apparently a copy'n'paste was accidentally a cut'n'paste 2016-02-02 12:53:32 -06:00
Gregory Nutt
009e9f76cb I2C: Fixes/improvements from last massive I2C commits 2016-02-02 07:13:03 -06:00
Gregory Nutt
69ce24c70c I2C: Remove the setfrequency method from the interface 2016-02-01 16:31:13 -06:00
Gregory Nutt
f9053182d3 I2C: Remove setaddress method 2016-02-01 12:14:31 -06:00
Gregory Nutt
8c9bddf998 I2C: Eliminate the I2C_WRITE and I2C_READ macros 2016-02-01 08:57:22 -06:00
Gregory Nutt
10000841a8 The I2C_TRANSFER method is no longer optional 2016-01-31 14:16:05 -06:00
Gregory Nutt
3a781a2d3f Remove I2C slave methods from I2C master interface; rename i2c_dev_s to i2c_master_s. 2016-01-30 08:36:47 -06:00
Gregory Nutt
ceb415204e Move include/nuttx/i2c.h to include/nuttx/i2c/i2c_master.h 2016-01-30 08:00:16 -06:00
Gregory Nutt
efb5674742 drivers/ioexpander/pca9555: Now uses i2c_read and i2c_write instead of I2C_READ and I2C_WERITE 2016-01-26 11:07:47 -06:00
Gregory Nutt
d4a53ee131 I2C: Eliminate the I2C_WRITEREAD method 2016-01-26 10:26:16 -06:00
Gregory Nutt
67f38169b2 drivers/i2c: Move wrapper that implements I2C_WRITEREAD using I2C_transfer from pc9555.c to a new, comon i2c directory 2016-01-26 09:58:18 -06:00
Gregory Nutt
f74fbecf52 PCA9555 I/O expander: Fix an error in addressing noted by Stefan Kolb; convert to use I2C_TRANSFER instead of I2C_WRITEREAD which is not thread safe 2016-01-26 07:59:36 -06:00
Stefan Kolb
2b05f3e830 I/O Expander: Fix some bad macros, make naming consisted 2016-01-22 07:08:59 -06:00
Gregory Nutt
8ab93fdf98 Change name of drivers/discrete back to drivers/ioexpander 2015-12-15 08:40:34 -06:00
Gregory Nutt
cbb78071b3 Rename ioexpander/ directories to discrete/ 2015-11-01 13:14:48 -06:00
Gregory Nutt
cf14f8d1b5 drivers/: Fixes to spacing and alignement 2015-10-10 10:41:00 -06:00
Sebastien Lorquet
9c9b6162d8 PCA9555: Extend interface to include methods for reading more than one bit at a time. From Sébastien Lorquet. 2015-07-10 10:33:07 -06:00
Gregory Nutt
3971d97332 Update ChangeLog 2015-07-09 08:27:08 -06:00
Sebastien Lorquet
b947002d6a This commit adds:
-headers in nuttx/ioexpander to define the "generic" ioexpander framework
-files in drivers/ioexpander for the implementation of the NXP PCA9555 framework
-bindings in drivers/Kconfig and drivers/Makefile

From Sebastien Lorquet
2015-07-09 08:27:07 -06:00