The use of symbolic links leads to trouble in certain environments
(e.g. vagrant under Win). This PR gets rid of symlinks and uses
variables in the Makefiles to map to the correct linkerscripts
instead.
add peripheral drivers for Freescale Kinetis MCUs:
adc driver
cpuid driver
gpio driver
hwtimer_arch driver (hwtimer used Low Power Timer)
i2c driver (master mode only)
mcg driver
pwm driver
random_rnga driver
random_rngb driver
rtc driver
spi driver
timer driver (timer used Periodic Interrupt Timer)
uart driver
add doc.txt (configuration examples)
random_rnga: Update RNGA driver in preparation for RNGB driver.
random_rngb: Add RNGB driver.
spi: refactor SPI to work for multiple CTARS, add spi_acquire, spi_release
gpio: Add gpio_irq_enable, gpio_irq_disable. Refactor GPIO.
gpio: Add gpio_irq_enable, gpio_irq_disable.
gpio: Refactor ISR functions to work with all GPIOs (0-31) and all ports (PORTA-PORTH)
adc: Refactor ADC, add calibration and scaling.
Added integer scaling of results in adc_map.
Handle precision setting in adc_init.
Set ADC clock divider depending on module clock.
Add ADC_1 as a possible device.
Add ADC calibration procedure according to K60 ref manual.
Handle ADC pins which are not part of the pin function mux.
Signed-off-by: Joakim Gebart <joakim.gebart@eistec.se>
