From d722c765392420230addcb21693070011bdbf43e Mon Sep 17 00:00:00 2001
From: Maxim Salov <max.salov@gmail.com>
Date: Wed, 3 Oct 2012 21:37:11 +0300
Subject: [PATCH] Initial commit
---
Makefile | 56 +++++++++++++++++++++++++++
main.c | 62 +++++++++++++++++++++++++++++
uart0.c | 116 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
uart0.h | 7 ++++
4 files changed, 241 insertions(+)
create mode 100644 Makefile
create mode 100644 main.c
create mode 100644 uart0.c
create mode 100644 uart0.h
diff --git a/Makefile b/Makefile
new file mode 100644
index 000000000..4196a66fe
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,56 @@
+PROJECT_ELF=uart.elf
+PROJECT_MOT=$(PROJECT_ELF:.elf=.mot)
+PROJECT_MAP=$(PROJECT_ELF:.elf=.map)
+PROJECT_LST=$(PROJECT_ELF:.elf=.lst)
+
+PREFIX=rl78-elf
+
+LD = $(PREFIX)-gcc
+CC = $(PREFIX)-gcc
+AS = $(PREFIX)-gcc
+OBJCOPY = $(PREFIX)-objcopy
+OBJDUMP = $(PREFIX)-objdump
+SIZE = $(PREFIX)-size
+
+COMMON_PATH = ../common
+PROJECT_PATH = .
+
+PROJECT_LNK = $(COMMON_PATH)/rl78-R5F100SL.ld
+
+CFLAGS = -Wall -Wextra -Os -ggdb -ffunction-sections -fdata-sections -I$(PROJECT_PATH) -I$(COMMON_PATH) -mmul=g13
+LDFLAGS = -Wl,--gc-sections -Wl,-Map=$(PROJECT_MAP) -T $(PROJECT_LNK) -nostartfiles
+
+SOURCES = \
+ $(PROJECT_PATH)/main.c \
+ $(PROJECT_PATH)/uart0.c \
+ $(END)
+
+OBJS = $(SOURCES:.c=.o) $(COMMON_PATH)/crt0.o
+
+.PHONY: all
+
+all: $(PROJECT_MOT) $(PROJECT_LST)
+ $(SIZE) $(PROJECT_ELF)
+
+rom: $(PROJECT_MOT)
+
+$(PROJECT_MOT): $(PROJECT_ELF)
+ $(OBJCOPY) -O srec $^ $@
+
+$(PROJECT_LST): $(PROJECT_ELF)
+ $(OBJDUMP) -DS $^ > $@
+
+$(PROJECT_ELF): $(OBJS)
+ $(LD) $(LDFLAGS) -o $@ $^
+
+flash: $(PROJECT_MOT)
+ rl78flash -m2 -b500000 -vvwri /dev/ttyUSB0 $^
+
+erase:
+ rl78flash -m2 -b500000 -vveri /dev/ttyUSB0
+
+terminal:
+ rl78flash -t9600 /dev/ttyUSB0
+
+clean:
+ -rm -f $(OBJS) $(PROJECT_ELF) $(PROJECT_MOT) $(PROJECT_MAP) $(PROJECT_LST)
diff --git a/main.c b/main.c
new file mode 100644
index 000000000..480321676
--- /dev/null
+++ b/main.c
@@ -0,0 +1,62 @@
+#include "QB-R5F100SL-TB.h"
+#include "uart0.h"
+
+volatile unsigned char ticks = 0;
+volatile unsigned char flag_1hz = 0;
+
+__attribute__((interrupt))
+void wdti_handler(void)
+{
+}
+
+__attribute__((interrupt))
+void it_handler(void)
+{
+ ++ticks;
+ LED1 ^= 1;
+ if (0 == (0x07 & ticks))
+ {
+ flag_1hz = 1;
+ }
+}
+
+int main(void)
+{
+ asm("di");
+ /* Setup LEDs */
+ LED1 = 1;
+ LED2 = 1;
+ LED1_PIN = 0;
+ LED2_PIN = 0;
+ /* Setup clocks */
+ CMC.cmc = 0x11U; /* Enable XT1, disable X1 */
+ CSC.csc = 0x80U; /* Start XT1 and HOCO, stop X1 */
+ CKC.ckc = 0x00U;
+ /* Delay 1 second */
+ register unsigned long int i;
+ for (i = 0x000FFFFFUL; i; --i)
+ asm("nop");
+ OSMC.osmc = 0x00; /* Supply fsub to peripherals, including Interval Timer */
+ uart0_init();
+ /* Setup 12-bit interval timer */
+ RTCEN = 1; /* Enable 12-bit interval timer and RTC */
+ ITMK = 1; /* Disable IT interrupt */
+ ITPR0 = 0; /* Set interrupt priority - highest */
+ ITPR1 = 0;
+ ITMC.itmc = 0x8FFFU; /* Set maximum period 4096/32768Hz = 1/8 s, and start timer */
+ ITIF = 0; /* Clear interrupt request flag */
+ ITMK = 0; /* Enable IT interrupt */
+ asm ("ei"); /* Enable interrupts */
+ for(;;)
+ {
+ if (flag_1hz)
+ {
+ LED2 = 0;
+ flag_1hz = 0;
+ const char msg[] = "Hello, RL78! [:";
+ uart0_puts(msg);
+ LED2 = 1;
+ }
+ asm("halt");
+ }
+}
diff --git a/uart0.c b/uart0.c
new file mode 100644
index 000000000..0b79e4ac0
--- /dev/null
+++ b/uart0.c
@@ -0,0 +1,116 @@
+#include "uart0.h"
+#include <iodefine.h>
+#include <iodefine_ext.h>
+
+void uart0_init(void)
+{
+ /* Reference R01AN0459EJ0100 or hardware manual for details */
+ PIOR.pior = 0U; /* Disable IO redirection */
+ PM1.pm1 |= 0x06U; /* Set P11 and P12 as inputs */
+ SAU0EN = 1; /* Supply clock to serial array unit 0 */
+ SPS0.sps0 = 0x44U; /* Set input clock (CK00 and CK01) to fclk/16 = 2MHz */
+ ST0.st0 = 0x03U; /* Stop operation of channel 0 and 1 */
+ /* Setup interrupts (disable) */
+ STMK0 = 1; /* Disable INTST0 interrupt */
+ STIF0 = 0; /* Clear INTST0 interrupt request flag */
+ STPR10 = 1; /* Set INTST0 priority: lowest */
+ STPR00 = 1;
+ SRMK0 = 1; /* Disable INTSR0 interrupt */
+ SRIF0 = 0; /* Clear INTSR0 interrupt request flag */
+ SRPR10 = 1; /* Set INTSR0 priority: lowest */
+ SRPR00 = 1;
+ SREMK0 = 1; /* Disable INTSRE0 interrupt */
+ SREIF0 = 0; /* Clear INTSRE0 interrupt request flag */
+ SREPR10 = 1; /* Set INTSRE0 priority: lowest */
+ SREPR00 = 1;
+ /* Setup operation mode for transmitter (channel 0) */
+ SMR00.smr00 = 0x0023U; /* Operation clock : CK00,
+ Transfer clock : division of CK00
+ Start trigger : software
+ Detect falling edge as start bit
+ Operation mode : UART
+ Interrupt source : buffer empty
+ */
+ SCR00.scr00 = 0x8097U; /* Transmission only
+ Reception error interrupt masked
+ Phase clock : type 1
+ No parity
+ LSB first
+ 1 stop bit
+ 8-bit data length
+ */
+ SDR00.sdr00 = 0xCE00U; /* transfer clock : operation clock divided by 208
+ 2 MHz / 208 = ~9600 bps
+ */
+ /* Setup operation mode for receiver (channel 1) */
+ NFEN0.nfen0 |= 1; /* Enable noise filter on RxD0 pin */
+ SIR01.sir01 = 0x0007U; /* Clear error flags */
+ SMR01.smr01 = 0x0122U; /* Operation clock : CK00
+ Transfer clock : division of CK00
+ Start trigger : valid edge on RxD pin
+ Detect falling edge as start bit
+ Operation mode : UART
+ Interrupt source : transfer end
+ */
+ SCR01.scr01 = 0x4097U; /* Reception only
+ Reception error interrupt masked
+ Phase clock : type 1
+ No parity
+ LSB first
+ 1 stop bit
+ 8-bit data length
+ */
+ SDR01.sdr01 = 0xCE00U; /* transfer clock : operation clock divided by 208
+ 2 MHz / 208 = ~9600 bps
+ */
+ SO0.so0 |= 1; /* Prepare for use of channel 0 */
+ SOE0.soe0 |= 1;
+ P1.p1 |= (1 << 2); /* Set TxD0 high */
+ PM1.pm1 &= ~(1 << 2); /* Set output mode for TxD0 */
+ PM1.pm1 |= (1 << 1); /* Set input mode for RxD0 */
+ SS0.ss0 |= 0x03U; /* Enable UART0 operation (both channels) */
+ STIF0 = 1; /* Set buffer empty interrupt request flag */
+}
+
+int uart0_puts(const char * s)
+{
+ int len = 0;
+ SMR00.smr00 |= 0x0001U; /* Set buffer empty interrupt */
+ while ('\0' != *s)
+ {
+ while (0 == STIF0);
+ STIF0 = 0;
+ SDR00.sdr00 = *s++;
+ ++len;
+ }
+#if 0
+ while (0 == STIF0);
+ STIF0 = 0;
+ SDR00.sdr00 = '\r';
+#endif
+ while (0 == STIF0);
+ STIF0 = 0;
+ SMR00.smr00 &= ~0x0001U;
+ SDR00.sdr00 = '\n';
+ while (0 == STIF0);
+#if 0
+ while (0 != SSR00.BIT.bit6); /* Wait until TSF00 == 0 */
+#endif
+ return len;
+}
+
+__attribute__((interrupt))
+void st0_handler(void)
+{
+}
+
+__attribute__((interrupt))
+void sr0_handler(void)
+{
+}
+
+/* This is actually INTSRE0 interrupt handler */
+__attribute__((interrupt))
+void tm01h_handler(void)
+{
+}
diff --git a/uart0.h b/uart0.h
new file mode 100644
index 000000000..fd97204f5
--- /dev/null
+++ b/uart0.h
@@ -0,0 +1,7 @@
+#ifndef UART0_H__
+#define UART0_H__
+
+void uart0_init(void);
+int uart0_puts(const char * s);
+
+#endif // UART0_H__