nes-proj/cpu/stm32w108/hal/micro/cortexm3/button.c

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/** @file /hal/micro/cortexm3/button.c
* @brief button APIs
*
* <!--(C) COPYRIGHT 2010 STMicroelectronics. All rights reserved. -->
*/
#include PLATFORM_HEADER
#include BOARD_HEADER
#include "hal/micro/button.h"
#include "hal/micro/micro-common.h"
#include "hal/micro/cortexm3/micro-common.h"
void halInitButton(void)
{
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int8u i;
/* Configure GPIO for BUTTONSs */
ButtonResourceType *buttons = (ButtonResourceType *) boardDescription->io->buttons;
for (i = 0; i < boardDescription->buttons; i++) {
halGpioConfig(PORTx_PIN(buttons[i].gpioPort, buttons[i].gpioPin), GPIOCFG_IN_PUD);
halGpioSet(PORTx_PIN(buttons[i].gpioPort, buttons[i].gpioPin), GPIOOUT_PULLUP);
}
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}/* end halInitButton() */
int8u halGetButtonStatus(HalBoardButton button)
{
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int8u port = (button >> 3) & 0xf;
int8u pin = button & 0x7;
if (button != DUMMY_BUTTON)
{
return (BUTTON_INPUT_GPIO(port) & (1 << pin)) ? BUTTON_RELEASED : BUTTON_PRESSED;
}
return BUTTON_UNKNOWN;
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}/* end halGetButtonStatus()*/