//	button_task.c
//
//	--- public domain, no warranty.

#include <tk/tkernel.h>
#include <tm/tmonitor.h>
#include "lcd_task.h"

#define	PADDR	((_UB *)0xffffd1)
#define	PADR	((_UB *)0xffffd3)

LOCAL	ID	ButtonTsk;

#define	MAX_COUNTER	2500
#define	MIN_COUNTER	25

EXPORT	W	Delay = 100;
EXPORT	W	Counter = 500;

/* ボタン処理タスク */
LOCAL	void	button_task(void)
{
	INT	lcd_update;
	W	prev_delay;
	UB	sts;

	*PADDR = 0x00;	// all input (for MCU mode 1/2/5/7)
	lcd_update = 1;

	while (1) {
		tk_dly_tsk(10);
		sts = (*PADR & 0x0f) ^ 0x0f;	// PA0-PA3, '1':off

		prev_delay = Delay;

		/* 押されたボタンに応じた処理 */
		switch (sts) {
		case	1:
			if (Counter < MAX_COUNTER) {
				Counter++;
				Delay = (Counter / 5) / 5 * 5;
			}
			break;
		case	2:
			if (Counter > MIN_COUNTER) {
				Counter--;
				Delay = (Counter / 5) / 5 * 5;
			}
			break;
		default:
			break;
		}

		lcd_update |= (prev_delay != Delay);

		/* 不必要な画面描画を抑止 */
		if (lcd_update) {
			LCDBuf[24] = '0' + (Delay / 100) % 10;
			LCDBuf[25] = '0' + (Delay / 10) % 10;
			LCDBuf[26] = '0' + (Delay / 1) % 10;
			LCDBuf[27] = 'm';
			LCDBuf[28] = 's';
			LCDBuf[29] = 'e';
			LCDBuf[30] = 'c';
			tk_wup_tsk(LCDTsk);
			lcd_update = 0;
		}
	}

	tk_exd_tsk();
}

/* ボタン処理タスク・起動部分 */
EXPORT	ER	button_task_init(W start)
{
	W	er;
	T_CTSK	ctsk;

	/* 終了処理 */
	if (start < 0) {
		er = E_OK;
		goto fin2;
	}

	/* 処理タスク作成 */
	ctsk.exinf = NULL;
	ctsk.tskatr = TA_HLNG;
	ctsk.task = button_task;
	ctsk.itskpri = 28;
	ctsk.stksz = 512;
	er = tk_cre_tsk(&ctsk);
	if (er < E_OK) {
		tm_putstring((UB *)"button_task_init: tk_cre_tsk\n");
		goto fin0;
	}
	ButtonTsk = er;

	/* 処理タスク起動 */
	er = tk_sta_tsk(ButtonTsk, 0);
	if (er < E_OK) {
		tm_putstring((UB *)"button_task_init: tk_sta_tsk\n");
		goto fin1;
	}

	goto fin0;

 fin2:
	tk_ter_tsk(ButtonTsk);
 fin1:
	tk_del_tsk(ButtonTsk);
 fin0:
	return er;
}