Files

Karl Palsson fed62e7ef4 stm32l1: button-irq-printf: add syscfg clock.

Not strictly required as we're using port A out of the box, but makes
for bad example code, when the syscfg clock is required for selectin
exti sources other than port A.

2019-06-01 16:20:13 +00:00

main.c

stm32l1: button-irq-printf: add syscfg clock.

2019-06-01 16:20:13 +00:00

Makefile

Make the STM32 Makefile.includes usable from outside the examples tree (Issue #28 )

2014-01-06 22:25:55 +01:00

README.md

[README] Coarse sweep to use markup in READMEs.

2015-01-19 19:20:12 -08:00

syscfg.h

Initial commit.

2013-04-19 17:19:32 -07:00

README.md

README

Prints to the screen when the button is pushed/released (irq driven) 115200@8n1 console on PA2 (tx only)
uses basic timer 6 with overflows to generate a 1ms counter (not an ideal use, but shows some api methods and can be demoed on the disco board)
uses basic timer 7 with the exti interrupts to do ghetto input capture. Not as fast or precise as the real input capture modes, but can be used on any gpio pin.

No effort at saving power is made here. Current consumption on the Disco board is ~7.5mA when the green tick led is off, and about 10.5mA when it is on.

example output:

hi guys!
TICK 0
TICK 1
TICK 2
Pushed down!
held: 443 ms
Pushed down!
TICK 3
held: 217 ms
Pushed down!
held: 99 ms
Pushed down!
TICK 4
held: 73 ms
Pushed down!
held: 60 ms
TICK 5
Pushed down!
held: 98 ms
Pushed down!