fix/workaround for SPI too fast#2

Open

sylvandb wants to merge 16 commits intorsbohn:masterfrom

sylvandb:master

Commits on Jan 27, 2012

implement bitbang SPI for slow clock devices, cleanup SPI pin handling
Sylvan Butler
committed

Commits on Feb 10, 2012

add Lady Ada's PWM clock on pin 9
Sylvan Butler
committed
eliminate unneeded variables, use correct variable types, big cleanup
Sylvan Butler
committed

Commits on Feb 13, 2012

simplify both spi_send()
Sylvan Butler
committed

Commits on Feb 25, 2012

disable interrupts before programming timer1
Sylvan Butler
committed
Don't start_pmode if we're already in pmode. -- without baudrate change
Sylvan Butler
committed
Set error if GET_SIGN_ON not followed by CRC_EOP
Sylvan Butler
committed

Commits on May 31, 2013

Use SPI lib for the USE_SPI case

Peter Van Hoyweghen
authored and
Peter Van Hoyweghen
committed
factor bit bang code in a (minimal) class mimicing the one from SPI lib

Peter Van Hoyweghen
authored and
Peter Van Hoyweghen
committed
rm last references to AVR SPI regs, set new defaults: USE_SPI=yes, LADYADA_CLOCK=no (don't break existing ArduinoISP shields)

Peter Van Hoyweghen
authored and
Peter Van Hoyweghen
committed
compile for Due: introduce SPI_CLOCK_DIV_MAX; error if LADYADA_CLOCK is selected (not yet implemented)

Peter Van Hoyweghen
authored and
Peter Van Hoyweghen
committed

Commits on Jun 2, 2013

reset target before driving SCM or MOSI, reset sequence as in AVR datasheets under "Serial Programming Algorithm"

Peter Van Hoyweghen
authored and
Peter Van Hoyweghen
committed
introduce SERIAL_PRG to flexibly select which serial port to use for programming; on Due, SerialUSB will be used by default (does not autoreset)

Peter Van Hoyweghen
authored and
Peter Van Hoyweghen
committed
add TRACE macro's (printf debugging on second uart)

Peter Van Hoyweghen
authored and
Peter Van Hoyweghen
committed

Commits on Jun 4, 2013

rename USE_SPI to USE_HARDWARE_SPI; by default don't use hardware spi on Due

Peter Van Hoyweghen
authored and
Peter Van Hoyweghen
committed

Commits on Jun 5, 2013

Merge pull request #1 from PeterVH/due
sylvandb
committed