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59
Makefile
59
Makefile
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PROJECT_ELF=uart.elf
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PROJECT_MOT=$(PROJECT_ELF:.elf=.mot)
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PROJECT_MAP=$(PROJECT_ELF:.elf=.map)
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PROJECT_LST=$(PROJECT_ELF:.elf=.lst)
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# Find latest installed GNURL78 toolchain. If your toolchain is already in PATH, just comment next line.
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TOOL_PATH:=$(shell find /usr/share -maxdepth 1 -type d -iname "gnurl78*" | sort | tail -n 1)/bin
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PREFIX:=$(TOOL_PATH)/rl78-elf
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LD = $(PREFIX)-gcc
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CC = $(PREFIX)-gcc
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AS = $(PREFIX)-gcc
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OBJCOPY = $(PREFIX)-objcopy
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OBJDUMP = $(PREFIX)-objdump
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SIZE = $(PREFIX)-size
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COMMON_PATH = ../common
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PROJECT_PATH = .
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PROJECT_LNK = $(COMMON_PATH)/rl78-R5F100SL.ld
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CFLAGS = -Wall -Wextra -Os -ggdb -ffunction-sections -fdata-sections -I$(PROJECT_PATH) -I$(COMMON_PATH) -mmul=g13
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LDFLAGS = -Wl,--gc-sections -Wl,-Map=$(PROJECT_MAP) -T $(PROJECT_LNK) -nostartfiles
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SOURCES = \
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$(PROJECT_PATH)/main.c \
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$(PROJECT_PATH)/uart0.c \
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$(END)
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OBJS = $(SOURCES:.c=.o) $(COMMON_PATH)/crt0.o
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.PHONY: all
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all: $(PROJECT_MOT) $(PROJECT_LST)
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$(SIZE) $(PROJECT_ELF)
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rom: $(PROJECT_MOT)
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$(PROJECT_MOT): $(PROJECT_ELF)
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$(OBJCOPY) -O srec $^ $@
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$(PROJECT_LST): $(PROJECT_ELF)
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$(OBJDUMP) -DS $^ > $@
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$(PROJECT_ELF): $(OBJS)
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$(LD) $(LDFLAGS) -o $@ $^
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flash: $(PROJECT_MOT)
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rl78flash -m2 -b500000 -vvwri /dev/ttyUSB0 $^
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erase:
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rl78flash -m2 -b500000 -vveri /dev/ttyUSB0
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terminal:
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rl78flash -rt9600 /dev/ttyUSB0
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clean:
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-rm -f $(OBJS) $(PROJECT_ELF) $(PROJECT_MOT) $(PROJECT_MAP) $(PROJECT_LST)
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60
main.c
60
main.c
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#include "QB-R5F100SL-TB.h"
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#include "uart0.h"
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volatile unsigned char ticks = 0;
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volatile unsigned char flag_1hz = 0;
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__attribute__((interrupt))
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void
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wdti_handler(void)
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{
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}
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__attribute__((interrupt))
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void
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it_handler(void)
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{
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++ticks;
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LED1 ^= 1;
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if(0 == (0x07 & ticks)) {
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flag_1hz = 1;
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}
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}
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int
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main(void)
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{
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asm ("di");
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/* Setup LEDs */
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LED1 = 1;
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LED2 = 1;
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LED1_PIN = 0;
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LED2_PIN = 0;
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/* Setup clocks */
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CMC.cmc = 0x11U; /* Enable XT1, disable X1 */
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CSC.csc = 0x80U; /* Start XT1 and HOCO, stop X1 */
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CKC.ckc = 0x00U;
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/* Delay 1 second */
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register unsigned long int i;
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for(i = 0x000FFFFFUL; i; --i) {
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asm ("nop");
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}
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OSMC.osmc = 0x00; /* Supply fsub to peripherals, including Interval Timer */
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uart0_init();
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/* Setup 12-bit interval timer */
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RTCEN = 1; /* Enable 12-bit interval timer and RTC */
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ITMK = 1; /* Disable IT interrupt */
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ITPR0 = 0; /* Set interrupt priority - highest */
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ITPR1 = 0;
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ITMC.itmc = 0x8FFFU; /* Set maximum period 4096/32768Hz = 1/8 s, and start timer */
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ITIF = 0; /* Clear interrupt request flag */
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ITMK = 0; /* Enable IT interrupt */
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asm ("ei"); /* Enable interrupts */
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for(;;) {
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if(flag_1hz) {
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LED2 = 0;
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flag_1hz = 0;
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uart0_puts("Hello, RL78! [:");
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LED2 = 1;
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}
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asm ("halt");
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}
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}
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