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/**************************************************************************//**
*
* @copyright (C) 2019 Nuvoton Technology Corp. All rights reserved.
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2020-12-12 Wayne First version
*
******************************************************************************/
#include <rtconfig.h>
#include <rtdevice.h>
#if defined(RT_USING_PIN)
#include <drv_gpio.h>
/* defined the INDICATOR_LED pin: PH2 */
#define INDICATOR_LED NU_GET_PININDEX(NU_PH, 2)
#define MATRIX_COL_NUM 2
#define MATRIX_ROW_NUM 3
/* defined the KEY_COl_0 pin: PB4 */
#define KEY_COL_0 NU_GET_PININDEX(NU_PB, 4)
/* defined the KEY_COl_1 pin: PB5 */
#define KEY_COL_1 NU_GET_PININDEX(NU_PB, 5)
/* defined the KEY_ROW_0 pin: PF10 */
#define KEY_ROW_0 NU_GET_PININDEX(NU_PF, 10)
/* defined the KEY_ROW_1 pin: PE15 */
#define KEY_ROW_1 NU_GET_PININDEX(NU_PE, 15)
/* defined the KEY_ROW_2 pin: PE14 */
#define KEY_ROW_2 NU_GET_PININDEX(NU_PE, 14)
uint32_t au32KeyMatrix_Col[MATRIX_COL_NUM] = { KEY_COL_0, KEY_COL_1 };
uint32_t au32KeyMatrix_Row[MATRIX_ROW_NUM] = { KEY_ROW_0, KEY_ROW_1, KEY_ROW_2 };
const char *szKeyLabel[] =
{
"K1",
"K2",
"K3",
"K4",
"K5",
"K6"
};
static void nu_key_matrix_cb(void *args)
{
uint32_t ri = (uint32_t)args;
int ci;
for (ci = 0; ci < MATRIX_COL_NUM; ci++)
{
/* Find column bit is low. */
if (!rt_pin_read(au32KeyMatrix_Col[ci]))
{
break;
}
}
rt_kprintf("[%d %d] Pressed %s button.\n", ci, ri, szKeyLabel[(ci) + MATRIX_COL_NUM * ri]);
}
static void nu_key_matrix_switch(uint32_t counter)
{
int i;
for (i = 0; i < MATRIX_COL_NUM; i++)
{
/* set pin value to high */
rt_pin_write(au32KeyMatrix_Col[i], PIN_HIGH);
}
/* set pin value to low */
rt_pin_write(au32KeyMatrix_Col[counter % MATRIX_COL_NUM], PIN_LOW);
}
#endif
int main(int argc, char **argv)
{
#if defined(RT_USING_PIN)
uint32_t counter = 1;
int i = 0;
for (i = 0; i < MATRIX_ROW_NUM; i++)
{
/* set pin mode to input */
rt_pin_mode(au32KeyMatrix_Row[i], PIN_MODE_INPUT_PULLUP);
rt_pin_attach_irq(au32KeyMatrix_Row[i], PIN_IRQ_MODE_FALLING, nu_key_matrix_cb, (void *)i);
rt_pin_irq_enable(au32KeyMatrix_Row[i], PIN_IRQ_ENABLE);
}
for (i = 0; i < MATRIX_COL_NUM; i++)
{
/* set pin mode to output */
rt_pin_mode(au32KeyMatrix_Col[i], PIN_MODE_OUTPUT);
}
/* set INDICATOR_LED pin mode to output */
rt_pin_mode(INDICATOR_LED, PIN_MODE_OUTPUT);
/* Toggle column pins in key matrix. */
while (counter++ > 0)
{
rt_pin_write(INDICATOR_LED, PIN_HIGH);
rt_thread_mdelay(200);
rt_pin_write(INDICATOR_LED, PIN_LOW);
rt_thread_mdelay(200);
nu_key_matrix_switch(counter);
}
#endif
return 0;
}
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