SPIとI2Cに関するプログラムを追加した。

tnishinaga · Mar 14, 2014 · 735c492 · 735c492
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diff --git a/04_spii2c/LCDputc/Makefile b/04_spii2c/LCDputc/Makefile
@@ -0,0 +1,53 @@
+CROSS= arm-unknown-eabi-
+
+CC= $(CROSS)gcc
+LD= $(CROSS)ld
+OBJCOPY= $(CROSS)objcopy
+OBJDUMP= $(CROSS)objdump
+SIZE= $(CROSS)size
+READELF= $(CROSS)readelf
+
+# libgcc.a
+LIBS = -L/home/jitomesky/cross/rpi/arm-unknown-eabi/lib/gcc/arm-unknown-eabi/4.8.1/
+# newlib
+LIBS += -L/home/jitomesky/cross/rpi/arm-unknown-eabi/arm-unknown-eabi/lib/
+STARTUP= startup.o
+OBJS= main.o
+
+# systemcall
+OBJS += syscalls.o
+
+# RaspberryPi library
+OBJS+= rpi_lib/rpi_init.o rpi_lib/gpio/gpio.o rpi_lib/timer/timer.o rpi_lib/delay/delay.o
+OBJS+= rpi_lib/serial/serial.o
+OBJS+= rpi_lib/bss/clearbss.o
+
+CFLAGS= -mfloat-abi=soft -mlittle-endian
+CFLAGS+= -nostartfiles
+CFLAGS+= -ffreestanding
+CFLAGS+= -O0 -g3
+
+########################
+all:	rpi-micon.img
+
+rpi-micon.elf:	$(STARTUP) $(OBJS)
+	$(LD) -static -nostartfiles -T rpiMicon.lds $^ -o $@ $(LIBS) -lc -lgcc
+	$(OBJDUMP) -D rpi-micon.elf > rpi-micon.disas
+	$(SIZE) rpi-micon.elf > rpi-micon.size
+	$(READELF) -a rpi-micon.elf > rpi-micon.readelf
+
+.SUFFIXES: .elf .img
+
+.elf.img:
+	$(OBJCOPY) -O binary $< $@
+.c.o:
+	$(CC) $(CFLAGS) -c $< -o $@
+.S.o:
+	$(CC) $(CFLAGS) -c $< -o $@
+
+clean::
+	$(RM) -f *.o *.img *.elf */*.o */*/*.o 
+	$(RM) -f tags *~
+
+tags::
+	ctags *.[chS]
diff --git a/04_spii2c/LCDputc/main.c b/04_spii2c/LCDputc/main.c
@@ -0,0 +1,137 @@
+#include "rpi_lib/rpi.h"
+#include <stdio.h>
+#include <stdint.h>
+
+
+#define BSC1_BASE	(0x00804000)
+#define BSC1_C		((vu32_t *)PHY_PERI_ADDR(BSC1_BASE + 0x00))
+#define BSC1_S		((vu32_t *)PHY_PERI_ADDR(BSC1_BASE + 0x04))
+#define BSC1_DLEN	((vu32_t *)PHY_PERI_ADDR(BSC1_BASE + 0x08))
+#define BSC1_A		((vu32_t *)PHY_PERI_ADDR(BSC1_BASE + 0x0C))
+#define BSC1_FIFO	((vu32_t *)PHY_PERI_ADDR(BSC1_BASE + 0x10))
+#define BSC1_DIV	((vu32_t *)PHY_PERI_ADDR(BSC1_BASE + 0x14))
+#define BSC1_DEL	((vu32_t *)PHY_PERI_ADDR(BSC1_BASE + 0x18))
+#define BSC1_CLKT	((vu32_t *)PHY_PERI_ADDR(BSC1_BASE + 0x1C))
+
+// I2C(BSC) Concrol MASK(use OR MASK)
+#define BSC_C_I2CEN_EN		((vu32_t)0x01 << 15)
+#define BSC_C_ST_EN			((vu32_t)0x01 << 7)
+#define BSC_C_CLEAR_ALL		((vu32_t)0x03 << 4)
+#define BSC_C_READ_READ		((vu32_t)0x01)
+
+// I2C(BSC) Status MASK
+#define BSC_S_CLKT			((vu32_t)0x01 << 9)
+#define BSC_S_ERR			((vu32_t)0x01 << 8)
+#define BSC_S_RXF			((vu32_t)0x01 << 7)
+#define BSC_S_TXE			((vu32_t)0x01 << 6)
+#define BSC_S_RXD			((vu32_t)0x01 << 5)
+#define BSC_S_TXD			((vu32_t)0x01 << 4)
+#define BSC_S_RXR			((vu32_t)0x01 << 3)
+#define BSC_S_TXW			((vu32_t)0x01 << 2)
+#define BSC_S_DONE			((vu32_t)0x01 << 1)
+#define BSC_S_TA			((vu32_t)0x01 << 0)
+
+// LCD
+#define	AQM0802_ADDR	(0x7C)
+
+
+int main(void){
+	rpi_init();
+
+	// I2C init
+	// port setting
+	pinMode(2, ALT0); // SDA
+	pinMode(3, ALT0); // SCL
+	// set I2C clock divider
+	// SCL = 150[MHz] / 32768 = 4.58[kHz]
+	*BSC1_DIV = 0;
+
+	// LCD init start
+	// 送信準備
+	// Clear Status
+	*BSC1_S = BSC_S_CLKT | BSC_S_ERR | BSC_S_DONE;
+	// slave address
+	*BSC1_A = AQM0802_ADDR >> 1;
+	// Write mode
+	*BSC1_C &= ~BSC_C_READ_READ;
+	// Buffer clear
+	*BSC1_C |= BSC_C_CLEAR_ALL;
+	// 送信データ長設定
+	*BSC1_DLEN = 2*9; 
+
+	// set data
+	*BSC1_FIFO = 0x80; // Co=1,RS=0
+	*BSC1_FIFO = 0x38; // Function Set
+	*BSC1_FIFO = 0x80; // Co=1,RS=0
+	*BSC1_FIFO = 0x39; // Function Set
+	*BSC1_FIFO = 0x80; // Co=1,RS=0
+	*BSC1_FIFO = 0x14; // Internal OSC frequency
+	*BSC1_FIFO = 0x80; // Co=1,RS=0
+	*BSC1_FIFO = 0x70; // Contrast Set
+	*BSC1_FIFO = 0x80; // Co=1,RS=0
+	*BSC1_FIFO = 0x56; // Power/ICON/Contrast
+	*BSC1_FIFO = 0x80; // Co=1,RS=0
+	*BSC1_FIFO = 0x6C; // Follower control
+
+	// transfer start
+	*BSC1_C |= BSC_C_I2CEN_EN | BSC_C_ST_EN;
+
+	delay(250);
+
+	// 送信バッファが空いているか確認
+	while(!(*BSC1_S & BSC_S_TXW));
+	*BSC1_FIFO = 0x80; // Co=1,RS=0
+	*BSC1_FIFO = 0x38; // Function Set
+	// 送信バッファが空いているか確認
+	while(!(*BSC1_S & BSC_S_TXW));
+	*BSC1_FIFO = 0x80; // Co=1,RS=0
+	*BSC1_FIFO = 0x0C; // Display ON/OFF 
+	// 送信バッファが空いているか確認
+	while(!(*BSC1_S & BSC_S_TXW));
+	*BSC1_FIFO = 0x80; // Co=1,RS=0
+	*BSC1_FIFO = 0x01; // Display Clear
+
+	// 転送終了待ち
+	// 1 = Transfer complete
+	while(!(*BSC1_S & BSC_S_DONE));
+	// transfer end
+	// LCD init end
+
+	delay(200);
+
+	// print "Hello"
+	// 送信準備
+	// Clear Status
+	*BSC1_S = BSC_S_CLKT | BSC_S_ERR | BSC_S_DONE;
+	// slave address
+	*BSC1_A = AQM0802_ADDR >> 1;
+	// Write mode
+	*BSC1_C |= BSC_C_READ_WRITE;
+	// Buffer clear
+	*BSC1_C |= BSC_C_CLEAR_ALL;
+	// 送信データ長設定
+	*BSC1_DLEN = 8; 
+
+	// send data
+	*BSC1_FIFO = 0x80; // Co=1,RS=0
+	*BSC1_FIFO = 0x80 | 0x00; //set DDRAM address
+	*BSC1_FIFO = 0x40; // Co=0,RS=1
+	*BSC1_FIFO = 'H';
+	*BSC1_FIFO = 'e';
+	*BSC1_FIFO = 'l';
+	*BSC1_FIFO = 'l';
+	*BSC1_FIFO = 'o';
+
+	// transfer start
+	*BSC1_C |= BSC_C_I2CEN_EN | BSC_C_ST_EN;
+
+	// 転送終了待ち
+	// 1 = Transfer complete
+	while(!(*BSC1_S & BSC_S_DONE));
+	// transfer end
+
+	// I2C通信終了
+	*BSC1_C &= ~BSC_C_I2CEN_EN;
+
+	return 0;
+}
diff --git a/04_spii2c/LCDputc/raspi.cfg b/04_spii2c/LCDputc/raspi.cfg
@@ -0,0 +1,31 @@
+
+# Broadcom 2835 on Raspberry Pi
+
+telnet_port 4444
+#gdb_port 0
+#tcl_port 0
+
+#jtag_khz 1000
+adapter_khz 1000
+
+#jtag_nsrst_delay 400
+#jtag_ntrst_delay 400
+
+if { [info exists CHIPNAME] } {
+   set  _CHIPNAME $CHIPNAME
+} else {
+   set  _CHIPNAME raspi
+}
+
+reset_config none
+
+if { [info exists CPU_TAPID ] } {
+   set _CPU_TAPID $CPU_TAPID
+} else {
+   set _CPU_TAPID 0x07b7617F
+}
+jtag newtap $_CHIPNAME arm -irlen 5 -expected-id $_CPU_TAPID
+
+set _TARGETNAME $_CHIPNAME.arm
+target create $_TARGETNAME arm11 -chain-position $_TARGETNAME
+