From: hackbard <hackbard@staubsauger.localdomain>
Date: Thu, 6 Sep 2007 00:34:09 +0000 (+0200)
Subject: button support
X-Git-Url: https://hackdaworld.org/gitweb/?p=my-code%2Farm.git;a=commitdiff_plain;h=60432148802391c2ba390e9c56f999514653c969

button support
---

diff --git a/betty/Makefile b/betty/Makefile
index 0af33ac..54f1d34 100644
--- a/betty/Makefile
+++ b/betty/Makefile
@@ -18,6 +18,9 @@ CROSS_ROM_LDFLAGS = -Tlpc2220_rom.ld -nostartfiles -nostdlib
 HOST_TARGET = lpcload fwdump
 CROSS_TARGET = fwbc.hex fwflash.hex betty.hex
 
+# betty deps
+BETTY_DEPS = buttons.o
+
 # all projects
 all: $(HOST_TARGET) $(CROSS_TARGET)
 
@@ -36,9 +39,10 @@ arm: arm_clean $(CROSS_TARGET)
 %.elf: %.o startup.o
 	$(CROSS_LD) $(CROSS_RAM_LDFLAGS) startup.o -o $@ $<
 
-# special linker case ...
-betty.elf: betty.o startup.o
-	$(CROSS_LD) $(CROSS_ROM_LDFLAGS) startup.o -o $@ $<
+# betty is special ;)
+betty.elf: betty.o startup.o $(BETTY_DEPS)
+	#$(CROSS_LD) $(CROSS_ROM_LDFLAGS) startup.o -o $@ $<
+	$(CROSS_LD) $(CROSS_RAM_LDFLAGS) startup.o $(BETTY_DEPS) -o $@ $<
 
 # .hex out of .elf
 %.hex: %.elf
@@ -46,7 +50,7 @@ betty.elf: betty.o startup.o
 
 # host clean
 clean:
-	rm -f lpcload fwdump
+	rm -vf lpcload fwdump
 
 # arm clean
 arm_clean:
diff --git a/betty/betty.c b/betty/betty.c
index 81b4687..af593d8 100644
--- a/betty/betty.c
+++ b/betty/betty.c
@@ -5,48 +5,12 @@
  *
  */
 
-/*
- * includes
- */
-
-#include "lpc2xxx.h"
+#include "betty.h"
 
 /*
- * defines
+ * functions
  */
 
-/* bank 0/2 and boootloader addr/size */
-#define BANK0			0x80000000
-#define BANK1			0x81000000
-#define BANK2			0x82000000
-#define BANK_SIZE		0x00100000
-#define BOOTLOADER		0x7fffe000
-#define BL_SIZE			0x00002000
-
-/* flash cmd addresses - flash[0-18] <--> arm[1-19]*/
-#define B0F555	(*((volatile unsigned short *)(BANK0|0xaaa)))	// 0x555
-#define B0F2AA	(*((volatile unsigned short *)(BANK0|0x554)))	// 0x2aa
-#define B0F	(*((volatile unsigned short *)(BANK0)))
-#define B2F555	(*((volatile unsigned short *)(BANK2|0xaaa)))	// 0x555
-#define B2F2AA	(*((volatile unsigned short *)(BANK2|0x554)))	// 0x2aa
-#define B2F	(*((volatile unsigned short *)(BANK2)))
-
-/* lcd command and data addresses */
-#define LCD_CMD		(*((volatile unsigned char *)(BANK1)))
-#define LCD_DATA	(*((volatile unsigned char *)(BANK1+1)))
-
-/*
- * type definitions
- */
-
-typedef unsigned char u8;
-typedef unsigned short u16;
-typedef unsigned int u32;
-
- /*
-  * functions
-  */
-
 void mmap_init(u8 memtype) {
 
 	MEMMAP=memtype;
@@ -84,7 +48,10 @@ void pin_select_init() {
 
 void uart0_init(void) {
 
-	PINSEL0=0x05;			// pin select -> tx, rx
+	/* select pins 0.0 and 0.1 as tx and rx */
+	PINSEL0=(PINSEL0&~(0xf))|0x05;		// pin select -> tx, rx
+
+	/* configure uart0 */
 	UART0_FCR=0x07;			// enable fifo
 	UART0_LCR=0x83;			// set dlab + word length
 	UART0_DLL=0x04;			// br: 38400 @ 10/4 mhz
@@ -289,6 +256,8 @@ void bl_off(void) {
 int main() {
 
 	char buf[]="betty - live from the flash at 0x80000000! ;)\r\n";
+	u64 keys;
+	u8 i;
 
 	pll_init();
 	uart0_init();
@@ -296,13 +265,24 @@ int main() {
 	pin_select_init();
 	init_lcd(0);
 	bl_init();
+	button_init();
 
 	pause(0xffffff);
 
+	bl_toggle();
+
 	while(1) {
-		uart0_send_string(buf);
-		bl_toggle();
-		pause(0x9ffff);
+		uart0_send_string("\n");
+		//uart0_send_string(buf);
+		//bl_toggle();
+		pause(0x0fffff);
+		button_get_event(&keys,1000);
+		for(i=0;i<42;i++) {
+			//if(keys&(1<<i)) {
+			//	uart0_send_byte(0x30+i);
+			//	break;
+			uart0_send_byte(keys&(1<<i)?0x31:0x30);
+		}
 	}
 
 	return 0;
diff --git a/betty/buttons.c b/betty/buttons.c
new file mode 100644
index 0000000..ba76f8d
--- /dev/null
+++ b/betty/buttons.c
@@ -0,0 +1,97 @@
+/*
+ * buttons.c - button api
+ *
+ * author: hackbard@hackdaworld.org
+ *
+ */
+
+#include "buttons.h"
+
+void button_init(void) {
+
+	/* 
+	 * select as input the following pins
+	 *  - p0.30 : interrupt, wtf is the 'vw 3 p9'?
+	 *  - p0.28, p0.27, p3.21, p3.20, p0.22, p0.13 : column select
+	 *
+	 *  select as output
+	 *  - p2.18-p2.24 : the rows
+	 */
+
+	// gpio, as is: p3.20, p3.21
+	PINSEL1&=~((1<<29)|(1<<28));	// p0.30
+	PINSEL1&=~((1<<25)|(1<<24));	// p0.28
+	PINSEL1&=~((1<<23)|(1<<22));	// p0.27
+	PINSEL1&=~((1<<13)|(1<<12));	// p0.22
+	PINSEL0&=~((1<<27)|(1<<26));	// p0.13
+	// ctrl databus for p2.18 - p2.24
+	PINSEL2&=(PINSEL2&(~((1<<5)|(1<<4))))|(1<<4);
+	// input
+	IODIR0&=~((1<<30)|(1<<28)|(1<<27)|(1<<22)|(1<<13));
+	IODIR3&=~((1<<21)|(1<<20));
+	// output + pull them high
+	IODIR2|=((1<<18)|(1<<19)|(1<<20)|(1<<21)|(1<<22)|(1<<23)|(1<<24));
+	IOSET2=((1<<18)|(1<<19)|(1<<20)|(1<<21)|(1<<22)|(1<<23)|(1<<24));
+}
+
+void button_select_row(u8 row) {
+
+	IOSET2=((1<<18)|(1<<19)|(1<<20)|(1<<21)|(1<<22)|(1<<23)|(1<<24));
+	if(row>6)
+		return;
+	IOCLR2=(1<<(18+row));
+}
+
+u8 button_get_event(u64 *keys,int retries) {
+
+	u8 row;
+	u8 offset;
+	u8 cnt;
+	u32 port0,port3;
+
+	*keys=0;
+	cnt=0;
+
+	while(retries--) {
+		/* rest counter */
+		offset=0;
+		/* rows */
+		for(row=0;row<7;row++) {
+			/* select the row */
+			button_select_row(row);
+			/* scan the columns 6 */
+			port0=IOPIN0;
+			port3=IOPIN2;
+			if(!(port0&(1<<28))) {
+				*keys|=(1<<(offset+0));
+				cnt+=1;
+			}
+			if(!(port0&(1<<27))) {
+				*keys|=(1<<(offset+1));
+				cnt+=1;
+			}
+			if(!(port0&(1<<22))) {
+				*keys|=(1<<(offset+2));
+				cnt+=1;
+			}
+			if(!(port0&(1<<13))) {
+				*keys|=(1<<(offset+3));
+				cnt+=1;
+			}
+			if(!(port3&(1<<21))) {
+				*keys|=(1<<(offset+4));
+				cnt+=1;
+			}
+			if(!(port3&(1<<20))) {
+				*keys|=(1<<(offset+5));
+				cnt+=1;
+			}
+			offset+=6;
+		}
+		if(*keys)
+			break;
+	}
+
+	return cnt;
+}
+
diff --git a/betty/buttons.h b/betty/buttons.h
new file mode 100644
index 0000000..e4016b1
--- /dev/null
+++ b/betty/buttons.h
@@ -0,0 +1,18 @@
+/*
+ * buttons.h - button api header file
+ *
+ * author: hackbard@hackdaworld.org
+ *
+ */
+
+#ifndef BUTTONS_H
+#define BUTTONS_H
+
+/* includes */
+#include "betty.h"
+
+/* function prototypes */
+void button_init(void);
+unsigned char button_get_event(unsigned long long int *keys,int retries);
+
+#endif