Merge pull request #14 from kienvo/fb

Add dynamic framebuffer

Makefile

@@ -51,7 +51,8 @@ CH5xx_ble_firmware_library/StdPeriphDriver/CH58x_spi1.c \
 CH5xx_ble_firmware_library/RVMSIS/core_riscv.c \
 src/main.c \
 src/leddrv.c \
-src/button.c
+src/button.c \
+src/fb.c \
 
 
 # ASM sources

src/fb.c

@@ -0,0 +1,87 @@
+#include "fb.h"
+#include <memory.h>
+
+volatile static fb_t *current, *head, *tail;
+
+static void fb_add(fb_t *new, fb_t *prev, fb_t *next)
+{
+	next->prev = new;
+	new->next = next;
+	new->prev = prev;
+	prev->next = new;
+}
+
+fb_t *fblist_insert(fb_t *at, fb_t *new) 
+{
+	fb_add(new, at, at->next);
+	return new;
+}
+
+fb_t *fblist_append(fb_t *new) 
+{
+	fblist_insert(new, tail);
+	tail = new;
+	return new;
+}
+
+fb_t *fblist_gonext() 
+{
+	current = current->next;
+	current->scroll = 0;
+	return current;
+}
+
+fb_t *fblist_goprev() 
+{
+	current = current->prev;
+	current->scroll = 0;
+	return current;
+}
+
+fb_t *fblist_gohead()
+{
+	current = head;
+	current->scroll = 0;
+	return current;
+}
+
+fb_t *fblist_currentfb()
+{
+	return current;
+}
+
+static void list_del(fb_t *prev, fb_t *next)
+{
+	prev->next = next;
+	next->prev = prev;
+}
+
+fb_t *fblist_drop(fb_t *fb)
+{
+	list_del(fb->prev, fb->next);
+	return fb->next;
+}
+
+fb_t *fb_new(uint16_t width)
+{
+	fb_t *fb = malloc(sizeof(fb_t));
+	memset(fb, 0, sizeof(fb_t));
+
+	fb->width = width;
+	fb->buf = malloc(width * sizeof(uint16_t));
+	memset(fb->buf, 0, width * sizeof(uint16_t));
+
+	fb->modes = FIXED;
+
+	fb->next = fb;
+	fb->prev = fb;
+
+	return fb;
+}
+
+void fblist_init(uint16_t first_fb_width)
+{
+	current = fb_new(first_fb_width);
+	head = current;
+	tail = current;
+}

src/fb.h

@@ -0,0 +1,53 @@
+#ifndef __FB_H__
+#define __FB_H__
+
+#include <stdint.h>
+#include <stdlib.h>
+
+enum ANIMATION_MODES {
+	LEFT = 0,
+	RIGHT,
+	UP,
+	DOWN,
+	FIXED,
+	SNOWFLAKE,
+	PICTURE,
+	ANIMATION,
+	LASER,
+};
+
+typedef struct fb_st {
+	uint16_t   *buf;
+	uint16_t    width;
+	uint8_t     modes;
+	int         is_flash;
+	int         is_marquee;
+	// TODO: feat: Brightness for each fb
+	int         brightness;
+	// TODO: feat: Timeout for each fb to switch to next fb
+	uint32_t    timeout; // zero mean no timeout
+	uint16_t    scroll;
+
+	struct fb_st *next;
+	struct fb_st *prev;
+} fb_t;
+
+fb_t *fb_new(uint16_t width);
+static inline void fb_free(fb_t *fb) 
+{
+	free((fb)->buf);
+	free((fb));
+}
+
+fb_t *fblist_insert(fb_t *at, fb_t *new);
+fb_t *fblist_append(fb_t *new);
+fb_t *fblist_drop(fb_t *fb);
+
+fb_t *fblist_gonext();
+fb_t *fblist_goprev() ;
+fb_t *fblist_gohead();
+fb_t *fblist_currentfb();
+
+void fblist_init(uint16_t first_fb_width);
+
+#endif /* __FB_H__ */

src/main.c

@@ -3,10 +3,10 @@
 
 #include "leddrv.h"
 #include "button.h"
+#include "fb.h"
 
 #define FB_WIDTH 	(LED_COLS * 4)
 #define SCROLL_IRATIO   (16)
-#define FB_NUM_SPARE    (8)
 #define SCAN_F          (2000)
 #define SCAN_T          (FREQ_SYS / SCAN_F)
 
@@ -23,8 +23,6 @@ enum MODES {
 };
 #define BRIGHTNESS_LEVELS   (4)
 
-uint16_t fb[FB_NUM_SPARE][FB_WIDTH];
-
 uint8_t test_font[][11] = {
 	0x00, 0xFE, 0x66, 0x62, 0x68, 0x78, 0x68, 0x60, 0x60, 0xF0, 0x00, // F
 	0x00, 0x7C, 0xC6, 0xC6, 0xC6, 0xC6, 0xC6, 0xC6, 0xC6, 0x7C, 0x00, // O
@@ -49,9 +47,7 @@ void draw2fb(uint16_t *fb, int c, int col)
 	}
 }
 
-volatile int fb_sel, fb_num;
 volatile int mode, brightness;
-volatile uint64_t tick;
 
 __HIGH_CODE
 static void change_brightness()
@@ -67,9 +63,28 @@ static void change_mode()
 }
 
 __HIGH_CODE
-static void change_fb()
+static void fb_transition()
 {
-	NEXT_STATE(fb_sel, 0, fb_num);
+	fblist_gonext();
+}
+
+void draw_testfb()
+{
+
+	fb_t *curr_fb = fblist_currentfb();
+	curr_fb->modes = LEFT;
+
+	for (int i=0; i<8; i++) {
+		draw2fb(curr_fb->buf, i, 8 * (i + 4));
+	}
+
+	fb_t *fb_next = fb_new(8*12);
+	fblist_append(fb_next);
+	fb_next->modes = LEFT;
+	
+	for (int i=4; i<12; i++) {
+		draw2fb(fb_next->buf, i % 8, 8 * (i + 1));
+	}
 }
 
 int main()
@@ -77,36 +92,21 @@ int main()
 	SetSysClock(CLK_SOURCE_PLL_60MHz);
 
 	led_init();
-	draw2fb(fb[0], 0, 8*(5-1));
-	draw2fb(fb[0], 1, 8*(6-1));
-	draw2fb(fb[0], 2, 8*(7-1));
-	draw2fb(fb[0], 3, 8*(8-1));
-	draw2fb(fb[0], 4, 8*(9-1));
-	draw2fb(fb[0], 5, 8*(10-1));
-	draw2fb(fb[0], 6, 8*(11-1));
-	draw2fb(fb[0], 7, 8*(12-1));
-
-	draw2fb(fb[1], 4, 8*5);
-	draw2fb(fb[1], 5, 8*6);
-	draw2fb(fb[1], 6, 8*7);
-	draw2fb(fb[1], 7, 8*8);
-	draw2fb(fb[1], 0, 8*9);
-	draw2fb(fb[1], 1, 8*10);
-	draw2fb(fb[1], 2, 8*11);
-	draw2fb(fb[1], 3, 8*12);
-	fb_num = 2;
-
 	TMR0_TimerInit(SCAN_T / 2);
 	TMR0_ITCfg(ENABLE, TMR0_3_IT_CYC_END);
 	PFIC_EnableIRQ(TMR0_IRQn);
 
+	fblist_init(FB_WIDTH);
+
+	draw_testfb();
+
 	btn_init();
 	btn_onOnePress(KEY1, change_mode);
-	btn_onOnePress(KEY2, change_fb);
+	btn_onOnePress(KEY2, fb_transition);
 	btn_onLongPress(KEY1, change_brightness);
 
     while (1) {
-		int i = 0;
+		uint32_t i = 0;
 		while (isPressed(KEY2)) {
 			i++;
 			if (i>10) {
@@ -121,16 +121,19 @@ __INTERRUPT
 __HIGH_CODE
 void TMR0_IRQHandler(void)
 {
-	static int i, scroll;
+	static int i;
 
 	if (TMR0_GetITFlag(TMR0_3_IT_CYC_END)) {
 
+		fb_t *fb = fblist_currentfb();
 		i += 1;
 		if (i >= LED_COLS) {
 			i = 0;
-			scroll++;
+			if ((fb->modes & 0x0f) == LEFT) {
-			if (scroll >= (FB_WIDTH-LED_COLS)*SCROLL_IRATIO) {
+				fb->scroll++;
-				scroll = 0;
+				if (fb->scroll >= (fb->width-LED_COLS)*SCROLL_IRATIO) {
+					fb->scroll = 0;
+				}
 			}
 		}
 		
@@ -139,8 +142,8 @@ void TMR0_IRQHandler(void)
 				leds_releaseall();
 		} else {
 			led_write2dcol(i/2, 
-				fb[fb_sel][i+scroll/SCROLL_IRATIO], 
+				fb->buf[i+ fb->scroll/SCROLL_IRATIO], 
-				fb[fb_sel][i+scroll/SCROLL_IRATIO+1]);
+				fb->buf[i+ fb->scroll/SCROLL_IRATIO + 1]);
 		}
 
 		TMR0_ClearITFlag(TMR0_3_IT_CYC_END);