mirror of
https://github.com/afska/gba-link-connection.git
synced 2026-04-24 23:47:51 -05:00
Adding LinkSPI
This commit is contained in:
Rodrigo Alfonso
parent
bb436d2f9f
commit
d933cd8589
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@ -77,4 +77,10 @@ Name | Return type | Description
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`getMode(pin)` | **LinkGPIO::Direction** | Returns the direction set at `pin`.
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`readPin(pin)` | **bool** | Returns whether a `pin` is *HIGH* or not (when set as an input).
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`writePin(pin, isHigh)` | - | Sets a `pin` to be high or not (when set as an output).
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`setSIInterrupts(isEnabled)` | - | If it `isEnabled`, a IRQ will be generated when `SI` changes from *HIGH* to *LOW*.
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`setSIInterrupts(isEnabled)` | - | If it `isEnabled`, a IRQ will be generated when `SI` changes from *HIGH* to *LOW*.
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# LinkSPI
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// TODO: WRITE
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@ -1,18 +1,21 @@
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#include <tonc.h>
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#include <string>
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// (0) Include the header
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#include "../../_lib/LinkGPIO.h"
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void log(std::string text);
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std::string mode(std::string name, LinkGPIO::Pin pin);
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std::string value(std::string name, LinkGPIO::Pin pin, bool isHigh);
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// (1) Create a LinkGPIO instance
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LinkGPIO* linkGPIO = new LinkGPIO();
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void init() {
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REG_DISPCNT = DCNT_MODE0 | DCNT_BG0;
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tte_init_se_default(0, BG_CBB(0) | BG_SBB(31));
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// (2) Initialize the library
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linkGPIO->reset();
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}
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284
examples/LinkSPI_basic/Makefile
Normal file
284
examples/LinkSPI_basic/Makefile
Normal file
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@ -0,0 +1,284 @@
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#
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# Template tonc makefile
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#
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# Yoinked mostly from DKP's template
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#
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# === SETUP ===========================================================
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# --- No implicit rules ---
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.SUFFIXES:
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# --- Paths ---
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export TONCLIB := ${DEVKITPRO}/libtonc
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# === TONC RULES ======================================================
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#
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# Yes, this is almost, but not quite, completely like to
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# DKP's base_rules and gba_rules
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#
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export PATH := $(DEVKITARM)/bin:$(PATH)
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# --- Executable names ---
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PREFIX ?= arm-none-eabi-
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export CC := $(PREFIX)gcc
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export CXX := $(PREFIX)g++
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export AS := $(PREFIX)as
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export AR := $(PREFIX)ar
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export NM := $(PREFIX)nm
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export OBJCOPY := $(PREFIX)objcopy
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# LD defined in Makefile
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# === LINK / TRANSLATE ================================================
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%.gba : %.elf
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@$(OBJCOPY) -O binary $< $@
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@echo built ... $(notdir $@)
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@gbafix $@ -t$(TITLE)
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#----------------------------------------------------------------------
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%.mb.elf :
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@echo Linking multiboot
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$(LD) -specs=gba_mb.specs $(LDFLAGS) $(OFILES) $(LIBPATHS) $(LIBS) -o $@
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$(NM) -Sn $@ > $(basename $(notdir $@)).map
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#----------------------------------------------------------------------
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%.elf :
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@echo Linking cartridge
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$(LD) -specs=gba.specs $(LDFLAGS) $(OFILES) $(LIBPATHS) $(LIBS) -o $@
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$(NM) -Sn $@ > $(basename $(notdir $@)).map
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#----------------------------------------------------------------------
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%.a :
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@echo $(notdir $@)
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@rm -f $@
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$(AR) -crs $@ $^
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# === OBJECTIFY =======================================================
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%.iwram.o : %.iwram.cpp
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@echo $(notdir $<)
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$(CXX) -MMD -MP -MF $(DEPSDIR)/$*.d $(CXXFLAGS) $(IARCH) -c $< -o $@
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#----------------------------------------------------------------------
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%.iwram.o : %.iwram.c
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@echo $(notdir $<)
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$(CC) -MMD -MP -MF $(DEPSDIR)/$*.d $(CFLAGS) $(IARCH) -c $< -o $@
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#----------------------------------------------------------------------
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%.o : %.cpp
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@echo $(notdir $<)
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$(CXX) -MMD -MP -MF $(DEPSDIR)/$*.d $(CXXFLAGS) $(RARCH) -c $< -o $@
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#----------------------------------------------------------------------
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%.o : %.c
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@echo $(notdir $<)
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$(CC) -MMD -MP -MF $(DEPSDIR)/$*.d $(CFLAGS) $(RARCH) -c $< -o $@
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#----------------------------------------------------------------------
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%.o : %.s
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@echo $(notdir $<)
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$(CC) -MMD -MP -MF $(DEPSDIR)/$*.d -x assembler-with-cpp $(ASFLAGS) -c $< -o $@
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#----------------------------------------------------------------------
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%.o : %.S
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@echo $(notdir $<)
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$(CC) -MMD -MP -MF $(DEPSDIR)/$*.d -x assembler-with-cpp $(ASFLAGS) -c $< -o $@
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#----------------------------------------------------------------------
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# canned command sequence for binary data
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#----------------------------------------------------------------------
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define bin2o
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bin2s $< | $(AS) -o $(@)
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echo "extern const u8" `(echo $(<F) | sed -e 's/^\([0-9]\)/_\1/' | tr . _)`"_end[];" > `(echo $(<F) | tr . _)`.h
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echo "extern const u8" `(echo $(<F) | sed -e 's/^\([0-9]\)/_\1/' | tr . _)`"[];" >> `(echo $(<F) | tr . _)`.h
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echo "extern const u32" `(echo $(<F) | sed -e 's/^\([0-9]\)/_\1/' | tr . _)`_size";" >> `(echo $(<F) | tr . _)`.h
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endef
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# =====================================================================
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# --- Main path ---
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export PATH := $(DEVKITARM)/bin:$(PATH)
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# === PROJECT DETAILS =================================================
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# PROJ : Base project name
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# TITLE : Title for ROM header (12 characters)
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# LIBS : Libraries to use, formatted as list for linker flags
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# BUILD : Directory for build process temporaries. Should NOT be empty!
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# SRCDIRS : List of source file directories
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# DATADIRS : List of data file directories
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# INCDIRS : List of header file directories
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# LIBDIRS : List of library directories
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# General note: use `.' for the current dir, don't leave the lists empty.
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export PROJ ?= $(notdir $(CURDIR))
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TITLE := $(PROJ)
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LIBS := -ltonc -lugba
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BUILD := build
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SRCDIRS := src ../_lib
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DATADIRS := data
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INCDIRS := src
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LIBDIRS := $(TONCLIB) $(PWD)/../_lib/libugba
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# --- switches ---
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bMB := 0 # Multiboot build
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bTEMPS := 0 # Save gcc temporaries (.i and .s files)
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bDEBUG2 := 0 # Generate debug info (bDEBUG2? Not a full DEBUG flag. Yet)
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# === BUILD FLAGS =====================================================
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# This is probably where you can stop editing
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# NOTE: I've noticed that -fgcse and -ftree-loop-optimize sometimes muck
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# up things (gcse seems fond of building masks inside a loop instead of
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# outside them for example). Removing them sometimes helps
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# --- Architecture ---
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ARCH := -mthumb-interwork -mthumb
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RARCH := -mthumb-interwork -mthumb
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IARCH := -mthumb-interwork -marm -mlong-calls
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# --- Main flags ---
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CFLAGS := -mcpu=arm7tdmi -mtune=arm7tdmi -O2
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CFLAGS += -Wall
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CFLAGS += $(INCLUDE)
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CFLAGS += -ffast-math -fno-strict-aliasing
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CXXFLAGS := $(CFLAGS) -fno-rtti -fno-exceptions
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ASFLAGS := $(ARCH) $(INCLUDE)
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LDFLAGS := $(ARCH) -Wl,-Map,$(PROJ).map
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# --- switched additions ----------------------------------------------
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# --- Multiboot ? ---
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ifeq ($(strip $(bMB)), 1)
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TARGET := $(PROJ).mb
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else
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TARGET := $(PROJ)
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endif
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# --- Save temporary files ? ---
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ifeq ($(strip $(bTEMPS)), 1)
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CFLAGS += -save-temps
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CXXFLAGS += -save-temps
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endif
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# --- Debug info ? ---
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ifeq ($(strip $(bDEBUG)), 1)
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CFLAGS += -DDEBUG -g
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CXXFLAGS += -DDEBUG -g
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ASFLAGS += -DDEBUG -g
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LDFLAGS += -g
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else
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CFLAGS += -DNDEBUG
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CXXFLAGS += -DNDEBUG
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ASFLAGS += -DNDEBUG
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endif
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# === BUILD PROC ======================================================
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ifneq ($(BUILD),$(notdir $(CURDIR)))
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# Still in main dir:
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# * Define/export some extra variables
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# * Invoke this file again from the build dir
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# PONDER: what happens if BUILD == "" ?
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export OUTPUT := $(CURDIR)/$(TARGET)
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export VPATH := \
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$(foreach dir, $(SRCDIRS) , $(CURDIR)/$(dir)) \
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$(foreach dir, $(DATADIRS), $(CURDIR)/$(dir))
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export DEPSDIR := $(CURDIR)/$(BUILD)
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# --- List source and data files ---
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CFILES := $(foreach dir, $(SRCDIRS) , $(notdir $(wildcard $(dir)/*.c)))
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CPPFILES := $(foreach dir, $(SRCDIRS) , $(notdir $(wildcard $(dir)/*.cpp)))
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SFILES := $(foreach dir, $(SRCDIRS) , $(notdir $(wildcard $(dir)/*.s)))
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BINFILES := $(foreach dir, $(DATADIRS), $(notdir $(wildcard $(dir)/*.*)))
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# --- Set linker depending on C++ file existence ---
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ifeq ($(strip $(CPPFILES)),)
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export LD := $(CC)
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else
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export LD := $(CXX)
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endif
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# --- Define object file list ---
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export OFILES := $(addsuffix .o, $(BINFILES)) \
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$(CFILES:.c=.o) $(CPPFILES:.cpp=.o) \
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$(SFILES:.s=.o)
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# --- Create include and library search paths ---
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export INCLUDE := $(foreach dir,$(INCDIRS),-I$(CURDIR)/$(dir)) \
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$(foreach dir,$(LIBDIRS),-I$(dir)/include) \
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-I$(CURDIR)/$(BUILD)
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export LIBPATHS := -L$(CURDIR) $(foreach dir,$(LIBDIRS),-L$(dir)/lib)
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# --- Create BUILD if necessary, and run this makefile from there ---
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$(BUILD):
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@[ -d $@ ] || mkdir -p $@
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@make --no-print-directory -C $(BUILD) -f $(CURDIR)/Makefile
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arm-none-eabi-nm -Sn $(OUTPUT).elf > $(BUILD)/$(TARGET).map
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all : $(BUILD)
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clean:
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@echo clean ...
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@rm -rf $(BUILD) $(TARGET).elf $(TARGET).gba $(TARGET).sav
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else # If we're here, we should be in the BUILD dir
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DEPENDS := $(OFILES:.o=.d)
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# --- Main targets ----
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$(OUTPUT).gba : $(OUTPUT).elf
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$(OUTPUT).elf : $(OFILES)
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-include $(DEPENDS)
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endif # End BUILD switch
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# --- More targets ----------------------------------------------------
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.PHONY: clean rebuild start
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rebuild: clean $(BUILD)
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start:
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start "$(TARGET).gba"
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restart: rebuild start
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# EOF
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74
examples/LinkSPI_basic/src/main.cpp
Normal file
74
examples/LinkSPI_basic/src/main.cpp
Normal file
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@ -0,0 +1,74 @@
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#include <tonc.h>
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#include <string>
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// (0) Include the header
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#include "../../_lib/LinkSPI.h"
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#define PLAYERS 2
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void log(std::string text);
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LinkSPI* linkSPI = NULL;
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void init() {
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REG_DISPCNT = DCNT_MODE0 | DCNT_BG0;
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tte_init_se_default(0, BG_CBB(0) | BG_SBB(31));
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}
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int main() {
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init();
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while (true) {
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std::string output = "";
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u16 keys = ~REG_KEYS & KEY_ANY;
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if (linkSPI == NULL) {
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output += "START: Set as Master\n";
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output += "SELECT: Set as Slave";
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// (1) Create a LinkSPI instance
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if (keys & KEY_START)
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linkSPI = new LinkSPI(LinkSPI::Mode::MASTER_256KBPS);
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if (keys & KEY_SELECT)
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linkSPI = new LinkSPI(LinkSPI::Mode::SLAVE);
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} else {
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// Title
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auto modeName =
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linkSPI->getMode() == LinkSPI::Mode::SLAVE ? "Slave" : "Master";
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output += std::string("[") + modeName + "]\n";
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output += "(stop: L+R)\n\n";
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if (!linkSPI->isActive())
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log(output + "Waiting...");
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// Transfer
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u32 remoteKeys = linkSPI->transfer(keys, []() {
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u16 keys = ~REG_KEYS & KEY_ANY;
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return (keys & KEY_L) && (keys & KEY_R);
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});
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output += "local: " + std::to_string(keys) + "\n";
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output += "remote: " + std::to_string(remoteKeys) + "\n";
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// Cancel
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if ((keys & KEY_L) && (keys & KEY_R)) {
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linkSPI->deactivate();
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linkSPI = NULL;
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}
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}
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// Print
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log(output);
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while (REG_VCOUNT >= 160)
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; // wait till VDraw
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while (REG_VCOUNT < 160)
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; // wait till VBlank
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}
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return 0;
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}
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void log(std::string text) {
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tte_erase_screen();
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tte_write("#{P:0,0}");
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tte_write(text.c_str());
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}
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1
examples/_lib/LinkSPI.h
Symbolic link
1
examples/_lib/LinkSPI.h
Symbolic link
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@ -0,0 +1 @@
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../../lib/LinkSPI.h
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@ -2,7 +2,7 @@
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#define LINK_CABLE_H
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// --------------------------------------------------------------------------
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// A Link Cable connection for Multi-player mode.
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// A Link Cable connection for Multi-Player mode.
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// --------------------------------------------------------------------------
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// Usage:
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// - 1) Include this header in your main.cpp file and add:
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@ -31,7 +31,7 @@
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// (see examples)
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// --------------------------------------------------------------------------
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// `data` restrictions:
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// 0xFFFF and 0x0 are reserved values, so don't use them
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// 0xFFFF and 0x0 are reserved values, so don't use them!
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// (they mean 'disconnected' and 'no data' respectively)
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// --------------------------------------------------------------------------
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@ -25,8 +25,9 @@
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#include <tonc_core.h>
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#define LINK_GPIO_MODE 15
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#define LINK_GPIO_MODE_GENERAL_PURPOSE (1 << 15)
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#define LINK_GPIO_BIT_SI_INTERRUPT 8
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#define LINK_GPIO_GET(REG, BIT) ((REG >> BIT) & 1)
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#define LINK_GPIO_SET(REG, BIT, DATA) \
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if (DATA) \
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LINK_GPIO_SET_HIGH(REG, BIT); \
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@ -34,7 +35,6 @@
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LINK_GPIO_SET_LOW(REG, BIT);
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#define LINK_GPIO_SET_HIGH(REG, BIT) REG |= 1 << BIT
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#define LINK_GPIO_SET_LOW(REG, BIT) REG &= ~(1 << BIT)
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#define LINK_GPIO_GET(REG, BIT) ((REG >> BIT) & 1)
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const u8 LINK_GPIO_DATA_BITS[] = {2, 3, 1, 0};
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const u8 LINK_GPIO_DIRECTION_BITS[] = {6, 7, 5, 4};
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@ -45,7 +45,7 @@ class LinkGPIO {
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enum Direction { INPUT, OUTPUT };
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void reset() {
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REG_RCNT = 1 << LINK_GPIO_MODE;
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REG_RCNT = LINK_GPIO_MODE_GENERAL_PURPOSE;
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REG_SIOCNT = 0;
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}
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139
lib/LinkSPI.h
Normal file
139
lib/LinkSPI.h
Normal file
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@ -0,0 +1,139 @@
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#ifndef LINK_SPI_H
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#define LINK_SPI_H
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// --------------------------------------------------------------------------
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// An SPI handler for the Link Port (Normal Mode, 32bits).
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// --------------------------------------------------------------------------
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// Usage:
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// - 1) Include this header in your main.cpp file and add:
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// LinkSPI* linkSPI = new LinkSPI(LinkSPI::Mode::MASTER_256KBPS);
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// // (use LinkSPI::Mode::SLAVE on the other end)
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// - 2) Exchange 32-bit data with the other end:
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// u32 data = linkGPIO->transfer(0x1234);
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// // (this blocks the console indefinitely)
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// - 3) Exchange data with a cancellation callback:
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// u32 data = linkGPIO->transfer(0x1234, []() {
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// u16 keys = ~REG_KEYS & KEY_ANY;
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// return keys & KEY_START;
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// });
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// --------------------------------------------------------------------------
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// considerations:
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// - when using Normal Mode between two GBAs, use a GBC Link Cable!
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// - only use the 2Mbps mode with custom hardware (very short wires)!
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// --------------------------------------------------------------------------
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#include <tonc_core.h>
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#define LINK_SPI_MODE_SPI 0
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#define LINK_SPI_MODE_GENERAL_PURPOSE (1 << 15)
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#define LINK_SPI_BIT_CLOCK 0
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#define LINK_SPI_BIT_CLOCK_SPEED 1
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#define LINK_SPI_BIT_SI 2
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#define LINK_SPI_BIT_SO 3
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#define LINK_SPI_BIT_START 7
|
||||
#define LINK_SPI_BIT_LENGTH 12
|
||||
#define LINK_SPI_BIT_IRQ 14
|
||||
#define LINK_SPI_SET_HIGH(REG, BIT) REG |= 1 << BIT
|
||||
#define LINK_SPI_SET_LOW(REG, BIT) REG &= ~(1 << BIT)
|
||||
|
||||
class LinkSPI {
|
||||
public:
|
||||
enum Mode { SLAVE, MASTER_256KBPS, MASTER_2MBPS };
|
||||
|
||||
explicit LinkSPI(Mode mode) { this->mode = mode; }
|
||||
|
||||
bool isActive() { return isEnabled; }
|
||||
|
||||
void activate() {
|
||||
setNormalMode();
|
||||
set32BitPackets();
|
||||
|
||||
if (mode == SLAVE)
|
||||
setSlaveMode();
|
||||
else {
|
||||
setMasterMode();
|
||||
|
||||
if (mode == MASTER_256KBPS)
|
||||
set256KbpsSpeed();
|
||||
else if (mode == MASTER_2MBPS)
|
||||
set2MbpsSpeed();
|
||||
}
|
||||
|
||||
disableTransfer();
|
||||
isEnabled = true;
|
||||
}
|
||||
|
||||
void deactivate() {
|
||||
isEnabled = false;
|
||||
stopTransfer();
|
||||
disableTransfer();
|
||||
setGeneralPurposeMode();
|
||||
}
|
||||
|
||||
u32 transfer(u32 data) {
|
||||
return transfer(data, []() { return false; });
|
||||
}
|
||||
|
||||
template <typename F>
|
||||
u32 transfer(u32 data, F cancel) {
|
||||
if (!isEnabled || isMaster())
|
||||
activate();
|
||||
|
||||
setData(data);
|
||||
enableTransfer();
|
||||
|
||||
while (isMaster() && !isSlaveReady())
|
||||
if (cancel())
|
||||
return 0;
|
||||
|
||||
startTransfer();
|
||||
|
||||
while (!isReady())
|
||||
if (cancel())
|
||||
return 0;
|
||||
|
||||
disableTransfer();
|
||||
return getData();
|
||||
}
|
||||
|
||||
Mode getMode() { return mode; }
|
||||
|
||||
private:
|
||||
Mode mode;
|
||||
bool isEnabled = false;
|
||||
|
||||
void setNormalMode() {
|
||||
REG_RCNT = LINK_SPI_MODE_SPI;
|
||||
REG_SIOCNT = 0;
|
||||
}
|
||||
|
||||
void setGeneralPurposeMode() {
|
||||
REG_RCNT = LINK_SPI_MODE_GENERAL_PURPOSE;
|
||||
REG_SIOCNT = 0;
|
||||
}
|
||||
|
||||
void setData(u32 data) { REG_SIODATA32 = data; }
|
||||
u32 getData() { return REG_SIODATA32; }
|
||||
|
||||
void enableTransfer() { setBitLow(LINK_SPI_BIT_SO); }
|
||||
void disableTransfer() { setBitHigh(LINK_SPI_BIT_SO); }
|
||||
void startTransfer() { setBitHigh(LINK_SPI_BIT_START); }
|
||||
void stopTransfer() { setBitLow(LINK_SPI_BIT_START); }
|
||||
bool isReady() { return !isBitHigh(LINK_SPI_BIT_START); }
|
||||
bool isSlaveReady() { return !isBitHigh(LINK_SPI_BIT_SI); }
|
||||
|
||||
void set32BitPackets() { setBitHigh(LINK_SPI_BIT_LENGTH); }
|
||||
void setMasterMode() { setBitHigh(LINK_SPI_BIT_CLOCK); }
|
||||
void setSlaveMode() { setBitLow(LINK_SPI_BIT_CLOCK); }
|
||||
void set256KbpsSpeed() { setBitLow(LINK_SPI_BIT_CLOCK_SPEED); }
|
||||
void set2MbpsSpeed() { setBitHigh(LINK_SPI_BIT_CLOCK_SPEED); }
|
||||
|
||||
bool isMaster() { return mode != SLAVE; }
|
||||
bool isBitHigh(u8 bit) { return (REG_SIOCNT >> bit) & 1; }
|
||||
void setBitHigh(u8 bit) { LINK_SPI_SET_HIGH(REG_SIOCNT, bit); }
|
||||
void setBitLow(u8 bit) { LINK_SPI_SET_LOW(REG_SIOCNT, bit); }
|
||||
};
|
||||
|
||||
extern LinkSPI* linkSPI;
|
||||
|
||||
#endif // LINK_SPI_H
|
||||
Loading…
Reference in New Issue
Block a user