git.y1.nz

commit 82c9a3dd9a4461b83f8a2c910f30de9b869ff49b
parent 6fce22f6747aca7cf3b3f49a2d9389cd1b4d3bc7
Author: Toxa <untoxa@mail.ru>
Date:   Sat, 28 Aug 2021 22:11:53 +0300

examples: random number generator test

Diffstat:
A
gbdk-lib/examples/cross-platform/randtest/Makefile
77
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
A
gbdk-lib/examples/cross-platform/randtest/Makefile.targets
44
++++++++++++++++++++++++++++++++++++++++++++
A
gbdk-lib/examples/cross-platform/randtest/src/testrand.c
26
++++++++++++++++++++++++++
M
gbdk-lib/include/sms/sms.h
8
++++++++

4 files changed, 155 insertions(+), 0 deletions(-)
diff --git a/gbdk-lib/examples/cross-platform/randtest/Makefile b/gbdk-lib/examples/cross-platform/randtest/Makefile
@@ -0,0 +1,77 @@
+# If you move this project you can change the directory
+# to match your GBDK root directory (ex: GBDK_HOME = "C:/GBDK/"
+GBDK_HOME = ../../../
+LCC = $(GBDK_HOME)bin/lcc
+
+# Set platforms to build here, spaced separated. (These are in the separate Makefile.targets)
+# They can also be built/cleaned individually: "make gg" and "make gg-clean"
+# Possible are: gb gbc pocket sms gg
+TARGETS=gb pocket sms gg
+
+# Configure platform specific LCC flags here:
+LCCFLAGS_gb      = -Wl-yt0x1B # Set an MBC for banking (1B-ROM+MBC5+RAM+BATT)
+LCCFLAGS_pocket  = -Wl-yt0x1B # Usually the same as required for .gb
+LCCFLAGS_gbc     = -Wl-yt0x1B -Wm-yc # Same as .gb with: -Wm-yc (gb & gbc) or Wm-yC (gbc exclusive)
+LCCFLAGS_sms     =
+LCCFLAGS_gg      =
+
+LCCFLAGS += $(LCCFLAGS_$(EXT)) # This adds the current platform specific LCC Flags
+
+LCCFLAGS += -Wl-j -Wm-yoA -Wm-ya4 -autobank -Wb-ext=.rel -Wb-v # MBC + Autobanking related flags
+# LCCFLAGS += -debug # Uncomment to enable debug output
+# LCCFLAGS += -v     # Uncomment for lcc verbose output
+
+# You can set the name of the ROM file here
+PROJECTNAME = testrand
+
+# EXT?=gb # Only sets extension to default (game boy .gb) if not populated
+SRCDIR      = src
+OBJDIR      = obj/$(EXT)
+RESDIR      = res
+BINDIR      = build/$(EXT)
+MKDIRS      = $(OBJDIR) $(BINDIR) # See bottom of Makefile for directory auto-creation
+
+BINS	    = $(OBJDIR)/$(PROJECTNAME).$(EXT)
+CSOURCES    = $(foreach dir,$(SRCDIR),$(notdir $(wildcard $(dir)/*.c))) $(foreach dir,$(RESDIR),$(notdir $(wildcard $(dir)/*.c)))
+ASMSOURCES  = $(foreach dir,$(SRCDIR),$(notdir $(wildcard $(dir)/*.s)))
+OBJS       = $(CSOURCES:%.c=$(OBJDIR)/%.o) $(ASMSOURCES:%.s=$(OBJDIR)/%.o)
+
+# Builds all targets sequentially
+all: $(TARGETS)
+
+# Compile .c files in "src/" to .o object files
+$(OBJDIR)/%.o:	$(SRCDIR)/%.c
+	$(LCC) $(CFLAGS) -c -o $@ $<
+
+# Compile .c files in "res/" to .o object files
+$(OBJDIR)/%.o:	$(RESDIR)/%.c
+	$(LCC) $(CFLAGS) -c -o $@ $<
+
+# Compile .s assembly files in "src/" to .o object files
+$(OBJDIR)/%.o:	$(SRCDIR)/%.s
+	$(LCC) $(CFLAGS) -c -o $@ $<
+
+# If needed, compile .c files i n"src/" to .s assembly files
+# (not required if .c is compiled directly to .o)
+$(OBJDIR)/%.s:	$(SRCDIR)/%.c
+	$(LCC) $(CFLAGS) -S -o $@ $<
+
+# Link the compiled object files into a .gb ROM file
+$(BINS):	$(OBJS)
+	$(LCC) $(LCCFLAGS) $(CFLAGS) -o $(BINDIR)/$(PROJECTNAME).$(EXT) $(OBJS)
+
+clean:
+	@echo Cleaning
+	@for target in $(TARGETS); do \
+		$(MAKE) $$target-clean; \
+	done
+
+# Include available build targets
+include Makefile.targets
+
+
+# create necessary directories after Makefile is parsed but before build
+# info prevents the command from being pasted into the makefile
+ifneq ($(strip $(EXT)),)           # Only make the directories if EXT has been set by a target
+$(info $(shell mkdir -p $(MKDIRS)))
+endif
diff --git a/gbdk-lib/examples/cross-platform/randtest/Makefile.targets b/gbdk-lib/examples/cross-platform/randtest/Makefile.targets
@@ -0,0 +1,44 @@
+
+# Platform specific flags for compiling (only populate if they're both present)
+ifneq ($(strip $(PORT)),)
+ifneq ($(strip $(PLAT)),)
+CFLAGS += -m$(PORT):$(PLAT) -D_PLAT_$(PLAT)
+endif
+endif
+
+# Called by the individual targets below to build a ROM
+build-target: $(BINS)
+
+clean-target:
+	rm -rf $(OBJDIR)
+	rm -rf $(BINDIR)
+
+gb-clean:
+	${MAKE} clean-target EXT=gb
+gb:
+	${MAKE} build-target PORT=gbz80 PLAT=gb EXT=gb
+
+
+gbc-clean:
+	${MAKE} clean-target EXT=gbc
+gbc:
+	${MAKE} build-target PORT=gbz80 PLAT=gb EXT=gbc
+
+
+pocket-clean:
+	${MAKE} clean-target EXT=pocket
+pocket:
+	${MAKE} build-target PORT=gbz80 PLAT=ap EXT=pocket
+
+
+sms-clean:
+	${MAKE} clean-target EXT=sms
+sms:
+	${MAKE} build-target PORT=z80 PLAT=sms EXT=sms
+
+
+gg-clean:
+	${MAKE} clean-target EXT=gg
+gg:
+	${MAKE} build-target PORT=z80 PLAT=gg EXT=gg
+
diff --git a/gbdk-lib/examples/cross-platform/randtest/src/testrand.c b/gbdk-lib/examples/cross-platform/randtest/src/testrand.c
@@ -0,0 +1,26 @@
+/*
+    fonts.c
+    Simple example of how to use multiple fonts on the GB
+    Michael Hope, 1999.
+*/
+
+#include <stdio.h>
+#include <rand.h>
+
+#include <gbdk/platform.h>
+
+#include <gbdk/console.h>
+
+void main(void)
+{
+    while(TRUE) {
+        puts("press A...");
+        waitpad(J_A);
+        initarand(sys_time);
+        for (uint8_t i = 0; i != 16; i++) 
+            printf("rand=%hx arand=%hx\n", (uint8_t)rand(), (uint8_t)arand());
+    }
+}
+
+    
+    
diff --git a/gbdk-lib/include/sms/sms.h b/gbdk-lib/include/sms/sms.h
@@ -197,6 +197,14 @@ inline void display_off(void) {
 #define SPRITES_8x8 \
 	__WRITE_VDP_REG(VDP_R1, __READ_VDP_REG(VDP_R1) &= (~R1_SPR_8X16))
 
+/** Global Time Counter in VBL periods (60Hz)
+
+    Increments once per Frame
+
+    Will wrap around every ~18 minutes (unsigned 16 bits = 65535 / 60 / 60 = 18.2)
+*/
+extern volatile uint16_t sys_time;
+
 /** Tracks current active ROM bank in frame 1
 */
 #define _current_bank MAP_FRAME1

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