Browse Source

add rtc wip

SBird1337 6 years ago
parent
commit
3c9403bab4
4 changed files with 136 additions and 1 deletions
  1. 4
    0
      bpre.sym
  2. 18
    0
      src/include/rtc.h
  3. 4
    1
      src/overworld/dns/dns.c
  4. 110
    0
      src/rtc/rtc.c

+ 4
- 0
bpre.sym View File

@@ -203,6 +203,10 @@ current_map_block_role_get = 0x08058F78|1;
203 203
 
204 204
 current_oe_state = 0x020386E0;
205 205
 
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+rtc_data = 0x080000C4;
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+rtc_direction = 0x080000C6;
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+rtc_control = 0x080000C8;
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+
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 /*__aeabi_idiv = 0x081E4018|1;
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 __aeabi_idivmod = 0x081E40F4|1;
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 __aeabi_uidiv = 0x081E460C|1;

+ 18
- 0
src/include/rtc.h View File

@@ -0,0 +1,18 @@
1
+#ifndef RTC_H_
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+#define RTC_H_
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+
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+#include <pokeagb/pokeagb.h>
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+
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+struct RtcTimestamp {
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+    u8 year;
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+    u8 month;
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+    u8 day;
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+    u8 day_of_week;
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+    u8 hour;
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+    u8 minute;
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+    u8 second;
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+};
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+
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+void rtc_get_time(struct RtcTimestamp* out);
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+
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+#endif

+ 4
- 1
src/overworld/dns/dns.c View File

@@ -1,6 +1,7 @@
1 1
 #include <pokeagb/pokeagb.h>
2 2
 #include <agb_debug.h>
3 3
 #include <dns.h>
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+#include <rtc.h>
4 5
 
5 6
 #define DNS_BUF_SIZE 256
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 #define DNS_SEC_PAL_START 224
@@ -62,6 +63,9 @@ void dns_blockset_load_palette(struct MapBlockset* blockset, u16 offset, u16 siz
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 }
63 64
 
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 void dns_oec01_load_pal_impl(u32 *oe_script) {
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+    struct RtcTimestamp stamp;
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+    rtc_get_time(&stamp);
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+    dprintf("rtc data was read: %x.%x.%x\n", stamp.day, stamp.month, stamp.year);
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     struct SpritePalette *pal = (struct SpritePalette *)oe_read_word(oe_script);
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     struct SpritePalette palToApply = {
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         .data = NULL,
@@ -115,7 +119,6 @@ void dns_pal_patch_for_npc(u16 tag, u8 idx)
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     memcpy(buffer, ow_pal_table[npcPalIdx].data,32);
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     dns_modify_palette(buffer,16);
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     gpu_pal_apply(buffer, 256 + 16*idx, 32);
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-
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     free(buffer);
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     tint_palette_switch(idx);
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 }

+ 110
- 0
src/rtc/rtc.c View File

@@ -0,0 +1,110 @@
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+#include <pokeagb/pokeagb.h>
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+
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+#define HIGH 1
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+#define LOW 0
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+#define IN 0
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+#define OUT 1
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+
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+struct RtcTimestamp {
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+    u8 year;
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+    u8 month;
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+    u8 day;
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+    u8 day_of_week;
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+    u8 hour;
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+    u8 minute;
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+    u8 second;
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+};
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+
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+struct RtcGpioData {
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+    u16 sck : 1;
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+    u16 sio : 1;
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+    u16 cs : 1;
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+    u16 unused : 1;
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+    u16 free : 12;
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+};
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+
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+ASSERT_SIZEOF(struct RtcGpioData, 2);
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+
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+struct RtcGpioDirection {
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+    u16 sck : 1;
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+    u16 sio : 1;
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+    u16 cs : 1;
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+    u16 unused : 1;
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+    u16 free : 12;
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+};
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+
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+ASSERT_SIZEOF(struct RtcGpioDirection, 2);
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+
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+extern struct RtcGpioData rtc_data;
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+extern struct RtcGpioDirection rtc_direction;
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+extern u16 rtc_control;
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+
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+void rtc_wait_cycles(volatile u16 cycles);
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+void rtc_write(u8 b);
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+u8 rtc_read(void);
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+
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+void rtc_get_time(struct RtcTimestamp* out)
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+{
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+    rtc_control = 1;
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+
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+    rtc_direction.sck = OUT;
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+    rtc_direction.cs = OUT;
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+    rtc_data.cs = LOW;
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+    rtc_data.sck = HIGH;
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+
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+    rtc_wait_cycles(20);
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+
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+    rtc_data.cs = HIGH;
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+    rtc_wait_cycles(20);
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+    rtc_direction.sck = OUT;
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+    rtc_direction.cs = OUT;
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+    rtc_write(0x65);
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+
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+    out->year = rtc_read();
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+    out->month = rtc_read();
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+    out->day = rtc_read();
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+    out->day_of_week = rtc_read();
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+    out->hour = rtc_read();
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+    out->minute = rtc_read();
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+    out->second = rtc_read();
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+
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+    rtc_data.sck = LOW;
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+    rtc_data.sio = LOW;
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+    rtc_data.cs = LOW;
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+}
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+
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+void rtc_write(u8 b){
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+    rtc_direction.sio = OUT;
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+    rtc_direction.sck = OUT;
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+    for(u8 i = 0; i < 8; ++i) {
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+        rtc_data.sck = LOW;
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+        rtc_data.sio = (b & 0x80) >> 7;
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+        b <<= 1;
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+        rtc_wait_cycles(100);
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+        rtc_data.sck = HIGH;
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+        rtc_wait_cycles(100);
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+    }
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+}
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+
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+u8 rtc_read(void){
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+    u8 val = 0;
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+    rtc_direction.sio = IN;
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+    rtc_direction.sck = OUT;
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+    for(u8 i = 0; i < 8; ++i) {
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+        rtc_data.sck = LOW;
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+        rtc_wait_cycles(100);
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+        rtc_data.sck = HIGH;
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+        val |= (rtc_data.sio << i);
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+        rtc_wait_cycles(100);
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+    }
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+    return val;
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+}
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+
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+//this is a blocking wait, because fk IRQ
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+void rtc_wait_cycles(volatile u16 cycles)
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+{
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+    while(cycles > 0)
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+    {
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+        cycles--;
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+    }
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+}