Initial commit
This commit is contained in:
Maxim Salov
commit
d722c76539
4 changed files with 241 additions and 0 deletions
56
Makefile
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56
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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PREFIX=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 -t9600 /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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62
main.c
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62
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 wdti_handler(void)
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{
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}
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__attribute__((interrupt))
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void 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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{
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flag_1hz = 1;
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}
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}
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int 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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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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{
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if (flag_1hz)
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{
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LED2 = 0;
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flag_1hz = 0;
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const char msg[] = "Hello, RL78! [:";
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uart0_puts(msg);
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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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116
uart0.c
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116
uart0.c
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#include "uart0.h"
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#include <iodefine.h>
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#include <iodefine_ext.h>
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void uart0_init(void)
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{
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/* Reference R01AN0459EJ0100 or hardware manual for details */
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PIOR.pior = 0U; /* Disable IO redirection */
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PM1.pm1 |= 0x06U; /* Set P11 and P12 as inputs */
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SAU0EN = 1; /* Supply clock to serial array unit 0 */
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SPS0.sps0 = 0x44U; /* Set input clock (CK00 and CK01) to fclk/16 = 2MHz */
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ST0.st0 = 0x03U; /* Stop operation of channel 0 and 1 */
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/* Setup interrupts (disable) */
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STMK0 = 1; /* Disable INTST0 interrupt */
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STIF0 = 0; /* Clear INTST0 interrupt request flag */
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STPR10 = 1; /* Set INTST0 priority: lowest */
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STPR00 = 1;
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SRMK0 = 1; /* Disable INTSR0 interrupt */
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SRIF0 = 0; /* Clear INTSR0 interrupt request flag */
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SRPR10 = 1; /* Set INTSR0 priority: lowest */
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SRPR00 = 1;
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SREMK0 = 1; /* Disable INTSRE0 interrupt */
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SREIF0 = 0; /* Clear INTSRE0 interrupt request flag */
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SREPR10 = 1; /* Set INTSRE0 priority: lowest */
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SREPR00 = 1;
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/* Setup operation mode for transmitter (channel 0) */
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SMR00.smr00 = 0x0023U; /* Operation clock : CK00,
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Transfer clock : division of CK00
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Start trigger : software
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Detect falling edge as start bit
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Operation mode : UART
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Interrupt source : buffer empty
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*/
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SCR00.scr00 = 0x8097U; /* Transmission only
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Reception error interrupt masked
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Phase clock : type 1
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No parity
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LSB first
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1 stop bit
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8-bit data length
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*/
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SDR00.sdr00 = 0xCE00U; /* transfer clock : operation clock divided by 208
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2 MHz / 208 = ~9600 bps
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*/
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/* Setup operation mode for receiver (channel 1) */
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NFEN0.nfen0 |= 1; /* Enable noise filter on RxD0 pin */
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SIR01.sir01 = 0x0007U; /* Clear error flags */
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SMR01.smr01 = 0x0122U; /* Operation clock : CK00
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Transfer clock : division of CK00
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Start trigger : valid edge on RxD pin
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Detect falling edge as start bit
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Operation mode : UART
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Interrupt source : transfer end
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*/
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SCR01.scr01 = 0x4097U; /* Reception only
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Reception error interrupt masked
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Phase clock : type 1
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No parity
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LSB first
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1 stop bit
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8-bit data length
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*/
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SDR01.sdr01 = 0xCE00U; /* transfer clock : operation clock divided by 208
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2 MHz / 208 = ~9600 bps
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*/
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SO0.so0 |= 1; /* Prepare for use of channel 0 */
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SOE0.soe0 |= 1;
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P1.p1 |= (1 << 2); /* Set TxD0 high */
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PM1.pm1 &= ~(1 << 2); /* Set output mode for TxD0 */
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PM1.pm1 |= (1 << 1); /* Set input mode for RxD0 */
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SS0.ss0 |= 0x03U; /* Enable UART0 operation (both channels) */
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STIF0 = 1; /* Set buffer empty interrupt request flag */
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}
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int uart0_puts(const char * s)
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{
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int len = 0;
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SMR00.smr00 |= 0x0001U; /* Set buffer empty interrupt */
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while ('\0' != *s)
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{
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while (0 == STIF0);
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STIF0 = 0;
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SDR00.sdr00 = *s++;
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++len;
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}
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#if 0
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while (0 == STIF0);
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STIF0 = 0;
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SDR00.sdr00 = '\r';
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#endif
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while (0 == STIF0);
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STIF0 = 0;
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SMR00.smr00 &= ~0x0001U;
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SDR00.sdr00 = '\n';
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while (0 == STIF0);
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#if 0
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while (0 != SSR00.BIT.bit6); /* Wait until TSF00 == 0 */
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#endif
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return len;
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}
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__attribute__((interrupt))
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void st0_handler(void)
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{
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}
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__attribute__((interrupt))
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void sr0_handler(void)
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{
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}
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/* This is actually INTSRE0 interrupt handler */
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__attribute__((interrupt))
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void tm01h_handler(void)
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{
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}
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7
uart0.h
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7
uart0.h
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#ifndef UART0_H__
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#define UART0_H__
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void uart0_init(void);
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int uart0_puts(const char * s);
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#endif // UART0_H__
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