GitLab

Fix warning: C++11 requires a space between literal and identifier

This change fixes the following compiler warning I get when building
on Arduino IDE version 1.6.7

"/var/folders/sv/27zk61c9449f9wycpfhq9dmr0000gn/T/build68a338274e8c0af55d2a1e6113ec3df2.tmp/libraries/RF24/RF24.cpp.o"
/Users/flaviof/Documents/Arduino/libraries/RF24/RF24.cpp:559:17: warning: invalid suffix on literal; C++11 requires a space between literal and identifier [-Wliteral-suffix]
   printf_P(PSTR("Data Rate\t = "PRIPSTR"\r\n"),pgm_read_word(&rf24_datarate_e_str_P[getDataRate()]));
                 ^
/Users/flaviof/Documents/Arduino/libraries/RF24/RF24.cpp:560:17: warning: invalid suffix on literal; C++11 requires a space between literal and identifier [-Wliteral-suffix]
   printf_P(PSTR("Model\t\t = "PRIPSTR"\r\n"),pgm_read_word(&rf24_model_e_str_P[isPVariant()]));
                 ^
/Users/flaviof/Documents/Arduino/libraries/RF24/RF24.cpp:561:17: warning: invalid suffix on literal; C++11 requires a space between literal and identifier [-Wliteral-suffix]
   printf_P(PSTR("CRC Length\t = "PRIPSTR"\r\n"),pgm_read_word(&rf24_crclength_e_str_P[getCRCLength()]));
                 ^
/Users/flaviof/Documents/Arduino/libraries/RF24/RF24.cpp:562:17: warning: invalid suffix on literal; C++11 requires a space between literal and identifier [-Wliteral-suffix]
   printf_P(PSTR("PA Power\t = "PRIPSTR"\r\n"),  pgm_read_word(&rf24_pa_dbm_e_str_P[getPALevel()]));
                 ^

Fix GettingStarted sample

The GettingStarted sample is apparently intended to send a number from the transmitter
to the receiver and echo that same number back again, but the code wasn't outputting
the echoed number properly. Now it doesn, and the user can see that the same number was
sent and echoed back.

Signed-off-by: mz-fuzzy <mzfuzzy800@gmail.com>

Clean-up/fix of RF24 configuration examples in RPi/Python example.
Signed-off-by: mz-fuzzy <mzfuzzy800@gmail.com>

Ooops.. thanks to marceloaqno for spotting this.

- Update scanner examples to use channels 0-125
- Update documentation indicating channels 0-125 only
- Per datasheet radio only has 126 channels

RPI2 autodetection

- SPI_HAS_TRANSACTION define was not being picked up properly: add
define to RF24_arch_config.h
- Fix beginTransaction call using RF_SPI_SPEED instead of RF24_SPI_SPEED
- Change beginTransaction to use SPISettings object
-

- Bring beginTransaction inline with Arduino API
- #define SPI_HAS_TRANSACTION in SPI.h
- #define the spi speed on both Arduino and RPi/Linux using
RF24_SPI_SPEED instead of different vars
- Chg beginTransaction to use bitOrder & mode instead of CSN
- Add delay directly to chipSelect function (helps ensure pin is active
before beginning SPI transactions)

#173

- Fix blank response detect & remove wait

- Create interrupts folder for RPi examples
- Add new examples
- Update Makefile

- SPI transfern function calls transfernb function so a deadlock was
occurring when a lock was attempted prior to the call
- Thread should be unlocked before returning if bcm2835_init() fails

- Create separate mutex for SPI vs User data handling
Problems:
A: Memory/Data conflicts became apparent after time without thread-safe
queues
B: Without implementing locking at the SPI level, even simple code
examples (rx_transfer.cpp) would hang if a write was done out of sync
with reads

Solutions:
A: Keep initial locking mechanism for users
B: Implement separate automatic mutex and locking mechanism for SPI

#172 #173

per #172 #173

- Add mutex locking to SPI for RPi interrupt usage
- Leave rfInterrupts() rfNoInterrupts() functions for testing purposes

Using interrupts on RPi

Updated bcm library via http://www.airspayce.com/mikem/bcm2835/

http://www.airspayce.com/mikem/bcm2835/bcm2835-1.48.tar.gz