Gregory Nutt
caea59b340
SPI bit order: Add configuration setting to indicate if an architecture-specif SPI implementation does or does not support LSB bit order.
2016-08-08 12:21:20 -06:00
Gregory Nutt
6df28bc74e
Make bit-order SPI H/W feature configurable for better error detection
2016-08-08 11:54:13 -06:00
Gregory Nutt
21859af6d9
Add check of return value in drivers affected by last change: Report the error on a failure to set the bit order.
2016-08-08 08:40:37 -06:00
Gregory Nutt
7d4cb73bd6
STM32 and EFM32 SPI drivers adopted an incompatible conventions somewhere along the line. The set the number of bits to negative when calling SPI_SETBITS which had the magical side-effect of setting LSB first order of bit transmission. This is not only a hokey way to pass control information but is supported by no other SPI drivers.
...
This change three things: (1) It adds HWFEAT_LSBFIRST as a new H/W feature. (2) It changes the implementations of SPI_SETBITS in the STM32 and EFM32 derivers so that negated bit numbers are simply errors and it adds the SPI_HWFEATURES method that can set the LSB bit order, and (3) It changes all calls with negative number of bits from all drivers: The number of bits is now always positive and SPI_HWFEATUREs is called with HWFEAT_LSBFIRST to set the bit order.
2016-08-08 08:28:13 -06:00
Gregory Nutt
24c51ec1ff
Centralize definitions associated with CONFIG_DEBUG_LCD
2016-06-15 11:40:33 -06:00
Gregory Nutt
0665c7e06c
drivers/: Change some nerr() ERRORS to ninfo() and nwarn() WARNINGS.
2016-06-12 09:26:12 -06:00
Gregory Nutt
a1469a3e95
Add CONFIG_DEBUG_ERROR. Change names of *dbg() * *err()
2016-06-11 15:50:49 -06:00
Gregory Nutt
fc3540cffe
Replace all occurrences of vdbg with vinfo
2016-06-11 11:59:51 -06:00
Gregory Nutt
7edf921c5e
Remove CONFIG_SPI_OWNBUS: Now it is not just a good idea, it is the law
2016-01-23 18:54:36 -06:00
Gregory Nutt
f6e49caba8
All SPI-based device drivers needs to call SPI_HWFEATURES() with zero in order to co-exist with drivers that use H/W features
2016-01-23 16:18:13 -06:00
Gregory Nutt
cf14f8d1b5
drivers/: Fixes to spacing and alignement
2015-10-10 10:41:00 -06:00
Gregory Nutt
16b32bbadd
Standardize the width of all comment boxes in C files
2015-10-03 07:25:53 -06:00
Gregory Nutt
2abe0dd6dd
Change all variadic macros to C99 style
2014-05-22 09:01:51 -06:00
Gregory Nutt
3a1324741a
More trailing whilespace removal
2014-04-13 14:32:20 -06:00
Gregory Nutt
45d2bf2554
Support for Sharp Memory LCD. From Librae
2013-12-23 16:03:54 -06:00
