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
d47aa75669
Add PCF8574 I/O Expander driver. Some cleanup also of other expander drivers.
2016-08-01 11:10:11 -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
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
c6d65b0943
Update I/O Expander skeleton.c file
2016-07-31 15:43:36 -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
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
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
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
