button: add basic button functionalities

- Provided a way to set handler for each button one-press/long-press
- Debouncing with RC filter and Schmitt trigger

1 files changed, 59 insertions, 15 deletions

diff --git a/src/main.c b/src/main.c
index 4982ba0..2ee8211 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1,11 +1,29 @@
 #include "CH58x_common.h"

 #include "CH58x_sys.h"

+

 #include "leddrv.h"

+#include "button.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)

 

-#define FB_WIDTH 	LED_COLS*4

-#define SCROLL_IRATIO 	3

+#define NEXT_STATE(v, min, max) \

+				(v)++; \

+				if ((v) >= (max)) \

+					(v) = (min)

+

+enum MODES {

+	NORMAL = 0,

+	DOWNLOAD,

+	POWER_OFF,

+	MODES_COUNT,

+};

+#define BRIGHTNESS_LEVELS   (4)

 

-uint16_t fb[2][FB_WIDTH];

+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

@@ -31,21 +49,41 @@ void draw2fb(uint16_t *fb, int c, int col)
 	}

 }

 

-volatile int fb_sel = 0;

+volatile int fb_sel, fb_num;

+volatile int mode, brightness;

+volatile uint64_t tick;

+

+__HIGH_CODE

+static void change_brightness()

+{

+	NEXT_STATE(brightness, 0, BRIGHTNESS_LEVELS);

+}

+

+__HIGH_CODE

+static void change_mode()

+{

+	NEXT_STATE(mode, 0, MODES_COUNT);

+}

+

+__HIGH_CODE

+static void change_fb()

+{

+	NEXT_STATE(fb_sel, 0, fb_num);

+}

 

 int main()

 {

 	SetSysClock(CLK_SOURCE_PLL_60MHz);

 

 	led_init();

-	draw2fb(fb[0], 0, 8*5);

-	draw2fb(fb[0], 1, 8*6);

-	draw2fb(fb[0], 2, 8*7);

-	draw2fb(fb[0], 3, 8*8);

-	draw2fb(fb[0], 4, 8*9);

-	draw2fb(fb[0], 5, 8*10);

-	draw2fb(fb[0], 6, 8*11);

-	draw2fb(fb[0], 7, 8*12);

+	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);

@@ -55,16 +93,23 @@ int main()
 	draw2fb(fb[1], 1, 8*10);

 	draw2fb(fb[1], 2, 8*11);

 	draw2fb(fb[1], 3, 8*12);

+	fb_num = 2;

 

-	TMR0_TimerInit(1500);

+	TMR0_TimerInit(SCAN_T);

 	TMR0_ITCfg(ENABLE, TMR0_3_IT_CYC_END);

 	PFIC_EnableIRQ(TMR0_IRQn);

 

+	btn_init();

+	btn_onOnePress(KEY1, change_mode);

+	btn_onOnePress(KEY2, change_fb);

+	btn_onLongPress(KEY1, change_brightness);

+

 	while (1) {

 	}

 }

 

-__attribute__((interrupt))

+__INTERRUPT

+__HIGH_CODE

 void TMR0_IRQHandler(void)

 {

 	static int i, scroll;

@@ -77,7 +122,6 @@ void TMR0_IRQHandler(void)
 			scroll++;

 			if (scroll >= (FB_WIDTH-LED_COLS)*SCROLL_IRATIO) {

 				scroll = 0;

-				fb_sel = fb_sel == 0;

 			}

 		}

 		// This is a mess