From 76f100b8cb77df08d5c838904b4f9c9a62baeeac Mon Sep 17 00:00:00 2001
From: Safyrus <54881649+Safyrus@users.noreply.github.com>
Date: Thu, 3 Feb 2022 21:12:13 +0100
Subject: [PATCH] add h and c files

---
 include/constant.h      | 90 +++++++++++++++++++++++++++++++++++++++++
 include/ram_variables.h | 11 +++++
 include/type.h          |  7 ++++
 include/zp_variables.h  | 81 +++++++++++++++++++++++++++++++++++++
 src/main.c              | 90 +++++++++++++++++++++++++++++++++++++++++
 5 files changed, 279 insertions(+)
 create mode 100644 include/constant.h
 create mode 100644 include/ram_variables.h
 create mode 100644 include/type.h
 create mode 100644 include/zp_variables.h
 create mode 100644 src/main.c

diff --git a/include/constant.h b/include/constant.h
new file mode 100644
index 0000000..9b20a23
--- /dev/null
+++ b/include/constant.h
@@ -0,0 +1,90 @@
+#ifndef _CONSTANT_H_
+#define _CONSTANT_H_
+
+#include "type.h"
+
+// ----------
+//  PPU
+// ----------
+#define PPU_CTRL 0x2000
+#define PPU_MASK 0x2001
+#define PPU_STATUS 0x2002
+#define PPU_SCROLL 0x2005
+#define PPU_ADDR 0x2006
+#define PPU_DATA 0x2007
+
+//  PPU MASK
+#define PPU_MASK_GREY 0b00000001
+#define PPU_MASK_BKG8 0b00000010
+#define PPU_MASK_SPR8 0b00000100
+#define PPU_MASK_BKG 0b00001000
+#define PPU_MASK_SPR 0b00010000
+#define PPU_MASK_R 0b00100000
+#define PPU_MASK_G 0b01000000
+#define PPU_MASK_B 0b10000000
+
+//  PPU CTRL
+#define PPU_CTRL_NM_1 0b00000001
+#define PPU_CTRL_NM_2 0b00000010
+#define PPU_CTRL_INC 0b00000100
+#define PPU_CTRL_SPR 0b00001000
+#define PPU_CTRL_BKG 0b00010000
+#define PPU_CTRL_SPR_SIZE 0b00100000
+#define PPU_CTRL_SEL 0b01000000
+#define PPU_CTRL_NMI 0b10000000
+
+// ----------
+//  APU
+// ----------
+#define APU 0x4000
+
+#define APU_SQ1_VOL 0x4000
+#define APU_SQ1_SWEEP 0x4001
+#define APU_SQ1_LO 0x4002
+#define APU_SQ1_HI 0x4003
+
+#define APU_SQ2_VOL 0x4004
+#define APU_SQ2_SWEEP 0x4005
+#define APU_SQ2_LO 0x4006
+#define APU_SQ2_HI 0x4007
+
+#define APU_TRI_LINEAR 0x4008
+#define APU_TRI_LO 0x400A
+#define APU_TRI_HI 0x400B
+
+#define APU_NOISE_VOL 0x400C
+#define APU_NOISE_LO 0x400E
+#define APU_NOISE_HI 0x400F
+
+#define APU_DMC_FREQ 0x4010
+#define APU_DMC_RAW 0x4011
+#define APU_DMC_START 0x4012
+#define APU_DMC_LEN 0x4013
+
+#define APU_SND_CHN 0x4015
+#define APU_CTRL 0x4015
+#define APU_STATUS 0x4015
+#define APU_FRAME 0x4017
+
+// ----------
+//  OAM
+// ----------
+#define OAMDMA 0x4014
+
+// ----------
+//  IO
+// ----------
+#define IO_JOY1 0x4016
+#define IO_JOY2 0x4017
+
+// ----------
+//  NMI
+// ----------
+#define NMI_DONE 0b10000000
+#define NMI_SCRL 0b00010000
+#define NMI_PLT 0b00001000
+#define NMI_ATR 0b00000100
+#define NMI_SPR 0b00000010
+#define NMI_BKG 0b00000001
+
+#endif // _CONSTANT_H_
\ No newline at end of file
diff --git a/include/ram_variables.h b/include/ram_variables.h
new file mode 100644
index 0000000..7ad4291
--- /dev/null
+++ b/include/ram_variables.h
@@ -0,0 +1,11 @@
+#ifndef _RAM_VARIABLES_
+#define _RAM_VARIABLES_
+
+#include "type.h"
+
+extern uint8_t game_state;
+
+#define OAM_SIZE 256
+extern uint8_t OAM[OAM_SIZE];
+
+#endif // _RAM_VARIABLES_
\ No newline at end of file
diff --git a/include/type.h b/include/type.h
new file mode 100644
index 0000000..8cb4348
--- /dev/null
+++ b/include/type.h
@@ -0,0 +1,7 @@
+#ifndef _TYPE_H_
+#define _TYPE_H_
+
+typedef unsigned char uint8_t;
+typedef unsigned short uint16_t;
+
+#endif // _TYPE_H_
\ No newline at end of file
diff --git a/include/zp_variables.h b/include/zp_variables.h
new file mode 100644
index 0000000..10498df
--- /dev/null
+++ b/include/zp_variables.h
@@ -0,0 +1,81 @@
+#ifndef _ZP_VARIABLES_
+#define _ZP_VARIABLES_
+
+#include "type.h"
+
+
+// NMI Flags to activate graphical update
+// Note: You cannot activate all updates.
+//       You need to have a execution time
+//       < ~2273 cycles (2000 to be sure)
+// 7  bit  0
+// ---- ----
+// E..R PASB
+// |  | ||||
+// |  | |||+- Background tiles update
+// |  | |||   Execution time depend on data
+// |  | |||   (cycles ~= 16 + 38*p + for i:p do (14*p[i].n))
+// |  | |||   (p=packet number, p[i].n = packet data size)
+// |  | ||+-- Sprites update (513+ cycles)
+// |  | |+--- Nametables attributes update (821 cycles)
+// |  | +---- Palettes update (356 cycles)
+// |  +------ Scroll update (31 cycles)
+// +--------- 1 when NMI has ended, should be set to 0 after reading.
+//            If let to 1, it means the NMI is disable
+extern uint8_t nmi_flags;
+#pragma zpsym ("nmi_flags")
+
+
+// Scroll X position
+extern uint8_t scroll_x;
+#pragma zpsym ("scroll_x")
+
+
+// Scroll Y position
+extern uint8_t scroll_y;
+#pragma zpsym ("scroll_y")
+
+
+// Nametable high adress to update attributes for
+// $23 = Nametable 1
+// $27 = Nametable 2
+// $2B = Nametable 3
+// $2F = Nametable 4
+extern uint8_t atr_nametable;
+#pragma zpsym ("atr_nametable")
+
+
+// value of the PPU_MASK (need to be refresh manually)
+extern uint8_t ppu_ctrl_val;
+#pragma zpsym ("ppu_ctrl_val")
+
+
+// Attributes data to send to PPU during VBLANK
+#define ATTRIBUTES_SIZE 64
+extern uint8_t attributes[ATTRIBUTES_SIZE];
+#pragma zpsym ("attributes")
+
+
+// Palettes data to send to PPU during VBLANK
+//   byte 0   = transparente color
+//   byte 1-3 = background palette 1
+//   byte 4-6 = background palette 2
+//   ...
+//   byte 13-16 = sprite palette 1
+//   ...
+#define PALETTES_SIZE 25
+extern uint8_t palettes[PALETTES_SIZE];
+#pragma zpsym ("palettes")
+
+
+// Background data to send to PPU during VBLANK
+// Packet structure:
+// byte 0   = v.ssssss (v= vertical draw, s= size)
+// byte 1-2 = ppu adress
+// byte 3-s = tile data
+// packet of size 0 means there is no more data to draw
+#define BACKGROUND_SIZE 128
+extern uint8_t background[BACKGROUND_SIZE];
+#pragma zpsym ("background")
+
+#endif // _ZP_VARIABLES_
\ No newline at end of file
diff --git a/src/main.c b/src/main.c
new file mode 100644
index 0000000..ee52dea
--- /dev/null
+++ b/src/main.c
@@ -0,0 +1,90 @@
+#include "constant.h"
+#include "zp_variables.h"
+#include "ram_variables.h"
+#include "famistudio_cc65.h"
+
+// #pragma bss-name(push, "ZEROPAGE")
+
+// test variable in zeropage
+// uint8_t zeroPageVar;
+
+// #pragma bss-name(push, "BSS")
+
+// test variable in RAM
+// uint8_t ramVar;
+
+extern uint8_t music_data_arpeggio[];
+
+void init()
+{
+    famistudio_init(1, music_data_arpeggio);
+    famistudio_music_play(0);
+    // zeroPageVar = 0;
+    // ramVar = 0;
+}
+
+void loop()
+{
+    static uint8_t i = 0;
+
+    // set PPU_MASK to draw background and sprites
+    *(uint8_t *)PPU_MASK = PPU_MASK_BKG + PPU_MASK_BKG8 + PPU_MASK_SPR + PPU_MASK_SPR8;
+
+    // tell to the nmi what we want to do for the next frame
+    nmi_flags = NMI_SCRL + NMI_PLT + NMI_BKG + NMI_ATR + NMI_SPR;
+
+    // tall the nmi we want to change the attruvtes of the first nametable
+    atr_nametable = 0x23;
+
+    // reset attributes
+    do
+    {
+        attributes[i] = 0;
+        ++i;
+    } while (i < ATTRIBUTES_SIZE);
+
+    // reset paletttes
+    i = 0;
+    do
+    {
+        palettes[i] = i;
+        ++i;
+    } while (i < PALETTES_SIZE);
+
+    // update sprite
+    OAM[0] = 0x40;
+    OAM[1] = 0x01;
+    OAM[2] = 0x00;
+    OAM[3] = game_state;
+
+    // update background
+    background[0] = 0x05;
+    background[1] = 0x20;
+    background[2] = game_state;
+    background[3] = 0x04;
+    background[4] = 0x00;
+    background[5] = 0x01;
+    background[6] = 0x02;
+    background[7] = 0x03;
+    background[8] = 0x00;
+
+    // inc variables
+    // ++zeroPageVar;
+    // ++ramVar;
+    ++game_state;
+}
+
+void main()
+{
+    init();
+    while (1)
+    {
+        // wait for the next frame
+        while ((nmi_flags & 0x80) == 0)
+        {
+        }
+        famistudio_update();
+
+        loop();
+    }
+}