finished/fixed button api

[my-code/arm.git] / betty / buttons.c

diff --git a/betty/buttons.c b/betty/buttons.c
index 15298a3..9eb99b5 100644 (file)
--- a/betty/buttons.c
+++ b/betty/buttons.c
@@ -7,11 +7,11 @@
 
 #include "buttons.h"
 
-void button_init(void) {
+void button_init(t_button *button) {
 
        /* 
         * select as input the following pins
-        *  - p0.30 : interrupt, wtf is the 'vw 3 p9'?
+        *  - 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
@@ -24,38 +24,61 @@ void button_init(void) {
        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);
+
        // ctrl addr bus for p3.20, p3.21
        PINSEL2=(PINSEL2&(~((1<<27)|(1<<26)|(1<<25))))|(1<<27)|(1<<26);
+
        // 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));
+
+       /* poll / interrupt mode */
+       if(button->mode&BUTTON_INT) {
+       }
+       else if(button->mode&BUTTON_POLL) {
+       }
 }
 
+void button_set_retries(t_button *button,int retries) {
+
+       button->retries=retries;
+}
+
+#define BUTTON_RESET \
+       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));
+       BUTTON_RESET;
        if(row>6)
                return;
        IOCLR2=(1<<(18+row));
 }
 
-u8 button_get_event(u64 *keys,int retries) {
+#define COUNT_AND_CHECK        cnt++; \
+                               if(cnt==BUTTON_MAX) \
+                                       break
+
+u8 button_get_event(t_button *button) {
 
        u8 row;
        u8 offset;
        u8 cnt;
        u32 port0,port3;
+       u8 retries;
 
-       *keys=0;
        cnt=0;
+       retries=button->retries;
 
        while(retries--) {
-               /* rest counter */
+               /* rest offset counter */
                offset=0;
                /* rows */
                for(row=0;row<7;row++) {
@@ -63,37 +86,40 @@ u8 button_get_event(u64 *keys,int retries) {
                        button_select_row(row);
                        /* scan the columns 6 */
                        port0=IOPIN0;
-                       port3=IOPIN2;
+                       port3=IOPIN3;
                        if(!(port0&(1<<28))) {
-                               *keys|=(1<<(offset+0));
-                               cnt+=1;
+                               button->key[cnt]=offset+0;
+                               COUNT_AND_CHECK;
                        }
                        if(!(port0&(1<<27))) {
-                               *keys|=(1<<(offset+1));
-                               cnt+=1;
+                               button->key[cnt]=offset+1;
+                               COUNT_AND_CHECK;
                        }
                        if(!(port0&(1<<22))) {
-                               *keys|=(1<<(offset+2));
-                               cnt+=1;
+                               button->key[cnt]=offset+2;
+                               COUNT_AND_CHECK;
                        }
                        if(!(port0&(1<<13))) {
-                               *keys|=(1<<(offset+3));
-                               cnt+=1;
+                               button->key[cnt]=offset+3;
+                               COUNT_AND_CHECK;
                        }
                        if(!(port3&(1<<21))) {
-                               *keys|=(1<<(offset+4));
-                               cnt+=1;
+                               button->key[cnt]=offset+4;
+                               COUNT_AND_CHECK;
                        }
                        if(!(port3&(1<<20))) {
-                               *keys|=(1<<(offset+5));
-                               cnt+=1;
+                               button->key[cnt]=offset+5;
+                               COUNT_AND_CHECK;
                        }
                        offset+=6;
                }
-               if(*keys)
+               if(cnt)
                        break;
        }
 
+       BUTTON_RESET;
+       button->cnt=cnt;
+
        return cnt;
 }