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146 Commits

Author SHA1 Message Date
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