simple embedded(encoder-like?) menu

sem.c

@@ -0,0 +1,251 @@
+#include "sem.h"
+#include "lcd.h"
+#include "delay.h"
+
+/*
+	((signed char (*)(signed char))
+	è ïîõîæèå - ýòî æóòêîå êîëäóíñòâî ñòàëî âîçìîæíî 
+	áëàãîäàðÿ ñîâåòàì SciFi ñ ôîðóìà http://caxapa.ru
+	Ýòî ïðåîáðàçîâàíèå ê óêàçàòåëþ íà ôóíêöèþ è å¸ âûçîâ
+*/
+
+
+
+static em_Item_t * p_Itm_entry = NULL_LINK;
+static bool selected = FALSE;
+static  em_Item_t * p_Act_item = NULL_LINK;
+
+static unsigned char active_pos = 0;
+
+
+void em_Init( em_Item_t * pMenu)
+{
+	p_Itm_entry = pMenu;
+	//selected = FALSE;
+	//p_Act_item = NULL_LINK;
+}
+
+
+// Replacing sprintf (this one don't understand 'hh'
+void xformat( char *buf, char type, signed char val)
+{
+char ibuf[5];
+unsigned char tmp, idx=4;
+
+	switch(type) {
+		case 0x00: // signed char
+			ibuf[idx--] = '\0';
+			if ( val<0 ) {
+				tmp = (-val);
+			} else {
+				tmp = val;
+			}
+			do {
+				ibuf[idx--] = (tmp%10)+'0';
+				tmp = tmp/10;
+			} while( tmp > 0);
+			ibuf[idx] = (val<0) ? '-' : ' ';
+			break;
+		case 0x01: // insigned 
+			ibuf[idx--] = '\0';
+			do {
+				ibuf[idx--] = (tmp%10)+'0';
+				tmp = tmp/10;
+			} while( tmp > 0);
+			break;
+	}
+	// add spaces before if it's need
+	while ((idx)>0) {
+		ibuf[--idx] = ' ';
+	}
+
+	for ( ; idx<=4; idx++ ) {
+		*buf++ = ibuf[idx];
+	}
+}
+
+
+void em_Show(void)
+{
+em_Item_t * em_curItem = p_Itm_entry;
+unsigned char m_i;
+char mode;
+
+	 m_i = 0;
+	 do {
+		lcd_print( 1, m_i, em_curItem->text);
+		if ( m_i !=  active_pos ) {
+			// Not active
+			mode = '.';
+		} else {
+			p_Act_item = em_curItem;
+			if ( selected == FALSE) {
+				// Active, not selected
+				mode = '>';
+			} else {
+				// Active, selected
+				mode = '#';
+			}
+		}
+		lcd_pchar( 0, m_i, mode);
+		m_i++;
+		em_curItem = em_curItem->fwLink;
+	} while ( em_curItem != NULL_LINK );
+
+	// clear screen area
+	while ( m_i < EM_LINES ) {
+		lcd_print( 0, m_i, "            " );
+		m_i++;
+	}
+}
+
+void em_Event( em_event_t evnt )
+{
+//signed char (*p_func_s)( signed char);
+//unsigned char (*p_func_u)( unsigned char);
+
+char v_char;
+char vis_buf[5];
+	if ( selected == FALSE) {
+	// ######## UNSELECTED #################
+		switch(evnt) {
+		//==================================
+			case em_press:
+				switch(p_Act_item->type) {
+				// -------------------------
+					case submenu:
+						selected = FALSE;
+						active_pos = 0;
+						p_Itm_entry = p_Act_item->item; // Entry point to submenu
+						p_Act_item =  p_Itm_entry; // place user pointer to first line
+						break;
+				// -------------------------
+					case schar:
+//						p_func_s = p_Act_item->item;
+//						v_char = (*p_func_s)(0);
+						v_char = ((signed char (*)(signed char))p_Act_item->item)(0);
+						xformat( vis_buf, 0, v_char);
+						lcd_print( 9, active_pos, vis_buf );
+						selected = TRUE;
+						break;
+				// -------------------------
+					case uchar:
+						lcd_pchar(1, 5, 'U');
+//						p_func_s = p_Act_item->item;
+//						v_char = (*p_func_u)(0);
+						v_char = ((unsigned char (*)(signed char))p_Act_item->item)(0);
+
+						xformat( vis_buf, 1, v_char);
+						lcd_print( 9, active_pos, vis_buf );
+						selected = TRUE;
+						break;
+				// -------------------------
+				//	case str:
+				//		break;
+				}
+				break;
+		//==================================
+			case em_up:
+				active_pos--;
+				break;
+		//==================================
+			case em_down:
+				active_pos++;
+				break;
+		//==================================
+		}
+	} else {
+	// ######## SELECTED ###################
+		switch(evnt) {
+		//==================================
+			case em_press:
+				switch(p_Act_item->type) {
+				// -------------------------
+					case submenu:
+						selected = FALSE;
+						active_pos = 0;
+						p_Itm_entry = p_Act_item->item; // Entry point to submenu
+						p_Act_item =  p_Itm_entry; // place user pointer to first line
+						break;
+				// -------------------------
+					case schar:
+//						p_func_s = p_Act_item->item;
+//						v_char = (*p_func_s)(0);
+						v_char = ((signed char (*)(signed char))p_Act_item->item)(0);
+						xformat( vis_buf, 0, v_char);
+						lcd_print( 9, active_pos, vis_buf );
+						selected = FALSE;
+						break;
+				// -------------------------
+					case uchar:
+						lcd_pchar(4, 5, '*');
+//						p_func_s = p_Act_item->item;
+//						v_char = (*p_func_u)(0);
+						v_char = ((unsigned char (*)(signed char))p_Act_item->item)(0);
+
+						xformat( vis_buf, 1, v_char);
+						lcd_print( 9, active_pos, vis_buf );
+						lcd_pchar(4, 6, '=');
+						selected = FALSE;
+						break;
+				// -------------------------
+				//	case str:
+				//		break;
+				}
+				break;
+		//==================================
+			case em_up:
+				switch(p_Act_item->type) {
+				// -------------------------
+					case submenu:
+						break;
+				// -------------------------
+					case schar:
+//						p_func_s = p_Act_item->item;
+//						v_char = (*p_func_s)(1);
+						v_char = ((signed char (*)(signed char))p_Act_item->item)(1);
+						xformat( vis_buf, 0, v_char);
+						lcd_print( 9, active_pos, vis_buf );
+						break;
+				// -------------------------
+					case uchar:
+						lcd_pchar(1, 5, '<');
+						//p_func_s = p_Act_item->item;
+						//v_char = (*p_func_u)(1);
+						v_char = ((unsigned char (*)(signed char))p_Act_item->item)(1);
+						xformat( vis_buf, 0, v_char);
+						lcd_print( 9, active_pos, vis_buf );
+						break;
+				}
+				break;
+		//==================================
+			case em_down:
+				switch(p_Act_item->type) {
+				// -------------------------
+					case submenu:
+						break;
+				// -------------------------
+					case schar:
+//						p_func_s = p_Act_item->item;
+//						v_char = (*p_func_s)(-1);
+						v_char = ((signed char (*)(signed char))p_Act_item->item)(-1);
+						xformat( vis_buf, 0, v_char);
+						lcd_print( 9, active_pos, vis_buf );
+						break;
+				// -------------------------
+					case uchar:
+						lcd_pchar(1, 5, '>');
+//						p_func_s = p_Act_item->item;
+//						v_char = (*p_func_u)(-1);
+						v_char = ((unsigned char (*)(signed char))p_Act_item->item)(-1);
+						xformat( vis_buf, 0, v_char);
+						lcd_print( 9, active_pos, vis_buf );
+						break;
+				}
+				break;
+		//==================================
+		}
+	}
+	em_Show();
+}
+

sem.h

@@ -0,0 +1,61 @@
+#ifndef __SEM_H__
+#define __SEM_H__
+
+// Simple Encoder-like menu
+
+// Menu item has a structure:
+// +------------+---------+------+-----------+
+// | ->fwLink   | -> text | type | item this |
+// +------------+---------+------+-----------+
+// fwLink - pointer no a next line for this level menu or NULL_LINK for last on this level
+// text   - pointer to a string with showed name
+// type   - type of this item; 'submenu' for next level menu
+// item   - pointer to a function or link to other menuitem
+
+
+// Button or encoder event
+typedef enum {
+	em_press,
+	em_up,
+	em_down
+} em_event_t ;
+
+// type of contest item
+typedef enum {
+	submenu,
+	schar,
+	uchar,
+	str,
+	dummy
+} em_ItmType_t;
+
+
+// union of pointers, strongly recommended SciFi from caxapa.ru
+
+// menu item structure
+struct em_Item_s {
+	struct em_Item_s * fwLink;
+	char * text;
+	em_ItmType_t type;
+	void * item;
+};
+
+// Declare menu type
+typedef const struct em_Item_s  em_Item_t;
+
+// Set start values for selected menu
+void em_Init( em_Item_t * pMenu);
+
+// pritn text menu
+void em_Show(void);
+
+// Call when event 
+// Use  em_Show() to update menu on screen
+void em_Event( em_event_t evnt );
+
+#define NULL_LINK ((em_Item_t *)0)
+#define EM_LINES 4 // number of lines on screen 
+
+
+
+#endif // __SEM_H__ //