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buttons: Add initial support for detecting button presses

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Add mcu support for periodically polling for a button press.  Add host
code support for registering buttons and invoking callbacks for them.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor
2018-01-26 14:27:55 -05:00
parent 4061026c25
commit 38d7b9ada0
4 changed files with 307 additions and 3 deletions
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2
src/Makefile
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@@ -5,4 +5,4 @@ src-$(CONFIG_HAVE_GPIO) += gpiocmds.c stepper.c endstop.c
src-$(CONFIG_HAVE_GPIO_ADC) += adccmds.c
src-$(CONFIG_HAVE_GPIO_SPI) += spicmds.c
src-$(CONFIG_HAVE_GPIO_HARD_PWM) += pwmcmds.c
src-$(CONFIG_HAVE_USER_INTERFACE) += lcd_st7920.c lcd_hd44780.c
src-$(CONFIG_HAVE_USER_INTERFACE) += lcd_st7920.c lcd_hd44780.c buttons.c