22 files changed, 213 insertions, 198 deletions
diff --git a/Makefile b/Makefile
index ea96319..53b42a0 100644
--- a/Makefile
+++ b/Makefile
@@ -94,6 +94,7 @@ proper: clean clean-docs
 
 .PHONY: help
 help:
+	@echo  "AVR input/output expansion library"
 	@echo  "all/libioe.a - Build library"
 	@echo  "config       - Start configuration program"
 	@echo  "menuconfig   - NCurses based configuration program (Kconfig)"
diff --git a/examples/blink/Kconfig b/examples/blink/Kconfig
index 9c3a502..ba7889c 100644
--- a/examples/blink/Kconfig
+++ b/examples/blink/Kconfig
@@ -6,4 +6,9 @@ config BLINK_DEFAULTS
 	default y
 	select CONFIG_IOPORTS
 
+config CONFIG_BLINK_IO
+	string "Output pin used to connect led"
+	depends on BLINK_DEFAULTS
+	default "IO_B0"
+
 source "../../ioe.Kconfig"
diff --git a/examples/blink/Makefile b/examples/blink/Makefile
index c70ed33..4e4f81e 100644
--- a/examples/blink/Makefile
+++ b/examples/blink/Makefile
@@ -1,4 +1,5 @@
 EXAMPLE_NAME = blink
 SRC = blink.c
 
+IOEROOT=../../
 include ../examples.mk
diff --git a/examples/blink/blink.c b/examples/blink/blink.c
index a1411e6..adc215b 100644
--- a/examples/blink/blink.c
+++ b/examples/blink/blink.c
@@ -3,12 +3,12 @@
 #include <ioport.h>
 
 int main() {
-	io_setout(IO_B0);
+	io_setout(CONFIG_BLINK_IO);
 
 	while (1) {
-		io_high(IO_B0);
+		io_high(CONFIG_BLINK_IO);
 		_delay_ms(500);
-		io_low(IO_B0);
+		io_low(CONFIG_BLINK_IO);
 		_delay_ms(500);
 	}
 }
diff --git a/examples/examples.mk b/examples/examples.mk
index f6b0acb..3d838e7 100644
--- a/examples/examples.mk
+++ b/examples/examples.mk
@@ -3,13 +3,16 @@ MAKEFLAGS += --no-builtin-rules
 # Note this file is included to Makefiles in lower directories so all paths here
 # are like thy would be from lower directory.
 
-# You have to define EXAMPLE_NAME variable
+ifndef IOEROOT
+$(error Before including examples.mk define IOEROOT)
+endif
 ifndef EXAMPLE_NAME
 $(error Before including examples.mk define EXAMPLE_NAME)
 endif
 ifndef SRC
 $(error Before including examples.mk define SRC)
 endif
+EXAMPLE_PATH ?= $(EXAMPLE_NAME)
 
 OBJ = $(patsubst %.c,%.o,$(SRC)) # This creates list of *.o files from *.c
 Q ?= @ # This can be overwritten to show commands
@@ -40,14 +43,14 @@ clean:
 	$(Q)$(RM) $(OBJ)
 	@echo " CLEAN $(EXAMPLE_NAME).elf $(EXAMPLE_NAME).hex"
 	$(Q)$(RM) $(EXAMPLE_NAME).elf $(EXAMPLE_NAME).hex
-	$(Q)$(MAKE) -C ../.. clean O=examples/$(EXAMPLE_NAME)
+	$(Q)$(MAKE) -C "$(IOEROOT)" clean O=examples/$(EXAMPLE_PATH)
 
 # Building targets are available only if configuration is generated
 ifneq ("$(wildcard $(CONFIG))","")
 -include $(CONFIG)
 # If you want change some standard CFLAGS, change them in configuration not here.
 # Add here only options that should not be applied to avr-ioe also.
-CFLAGS = -I../../include -mmcu=$(MMCU) -imacros build/config.h \
+CFLAGS = -I"$(IOEROOT)/include" -mmcu=$(MMCU) -imacros build/config.h \
 	 $(shell echo $(CCFLAGS)) $(shell echo -DF_CPU=$(F_CPU)000L)
 CC = $(CHOST)gcc
 OBJCOPY = $(CHOST)objcopy
@@ -66,9 +69,8 @@ $(OBJ): %.o: %.c libioe.a
 	$(Q)$(CC) $(CFLAGS) -c -o $@ $<
 
 libioe.a: $(CONFIG)
-	$(Q)$(MAKE) -C ../.. examples/$(EXAMPLE_NAME)/libioe.a O=examples/$(EXAMPLE_NAME)
+	$(Q)$(MAKE) -C "$(IOEROOT)" examples/$(EXAMPLE_PATH)/libioe.a O=examples/$(EXAMPLE_PATH)
 endif
 
-TOOL_PATH=../../tools
-IOEROOT=../../
-include ../../tools/kconfig.mk
+TOOL_PATH="$(IOEROOT)/tools"
+include $(IOEROOT)/tools/kconfig.mk
diff --git a/examples/spiblink/Makefile b/examples/spiblink/Makefile
deleted file mode 100644
index 621f237..0000000
--- a/examples/spiblink/Makefile
+++ /dev/null
@@ -1,66 +0,0 @@
-MAKEFLAGS += --no-builtin-rules
-PROJNAME = spiblink
-
-MSRC = master.c
-SSRC = slave.c
-
-MOBJ = $(patsubst %.c,%.o,$(MSRC))
-SOBJ = $(patsubst %.c,%.o,$(SSRC))
-
-.PHONY: all
-ifneq ("$(wildcard config)","") # Checking if configuration exists
-all: master.hex slave.hex
-	@echo Now you can flash $^ to your chips.
-else
-all: help
-endif
-
-# Edit here help like you ever want
-.PHONY: help
-help:
-	@echo  "AVR-IOE USART echo example"
-	@echo  " all         - Build example"
-	@echo  " config      - Start configuration program"
-	@echo  " menuconfig  - NCurses based configuration program"
-	@echo  " help        - Prints this text"
-	@echo  " clean       - Removing all object files generated from source files"
-
-.PHONY: clean
-clean:
-	@echo " CLEAN OBJ"
-	@$(RM) $(MOBJ) $(SOBJ)
-	@echo " CLEAN master and slave *.hex, *.elf"
-	@$(RM) master.elf master.hex
-	@$(RM) slave.elf slave.hex
-	@$(MAKE) -C ../.. clean
-
-# Building targets are available only if configuration is generated
-ifneq ("$(wildcard config)","")
--include config
-# If you want change some standard CFLAGS, change them in configuration not here.
-# Add here only options that should not be applied to avr-ioe also.
-CFLAGS = -I../../include -mmcu=$(MMCU) -imacros ../../.config.h \
-	 $(shell echo $(CONFCFLAGS)) $(shell echo -DF_CPU=$(F_CPU)000L)
-
-master.elf slave.elf: %.elf: ../../libioe.a %.o
-	@echo " LD       $@"
-	@avr-gcc -Os -mmcu=$(MMCU) $^ -o $@ -L../.. -lioe
-
-master.hex slave.hex: %.hex: %.elf
-	@echo " OBJCOPY  $@"
-	@avr-objcopy -O ihex -R .eeprom $< $@
-
-$(MOBJ) $(SOBJ): %.o: %.c ../../libioe.a
-	@echo " CC       $@"
-	@avr-gcc $(CFLAGS) -c -o $@ $<
-
-../../libioe.a: config
-	@CONFIG=$$(readlink -f config) $(MAKE) -C ../.. libioe.a
-endif
-
-config:
-	@CONFIG=$$(readlink -f config) $(MAKE) -C ../.. config
-
-.PHONY: menuconfig
-menuconfig:
-	@CONFIG=$$(readlink -f config) $(MAKE) -C ../.. menuconfig
diff --git a/examples/spiblink/config b/examples/spiblink/config
deleted file mode 100644
index 7455947..0000000
--- a/examples/spiblink/config
+++ /dev/null
@@ -1,23 +0,0 @@
-#
-# Automatically generated file; DO NOT EDIT.
-# AVR-IOE configuration
-#
-MMCU=atmega328p
-ATMEGA328P=y
-# ATTINY85 is not set
-F_CPU=16000
-
-#
-# Compilation options
-#
-GNUTOOLCHAIN_PREFIX=avr-
-CONFCFLAGS=-Os -ffunction-sections -fdata-sections -fshort-enums -Wall
-MCUSUPPORT_IOPORTS=y
-# CONFIG_IOPORTS is not set
-MCUSUPPORT_PCINT0=y
-MCUSUPPORT_PCINT1=y
-MCUSUPPORT_PCINT2=y
-MCUSUPPORT_SPI=y
-CONFIG_SPI=y
-MCUSUPPORT_USART=y
-# CONFIG_USART is not set
diff --git a/examples/spiblink/config.orig b/examples/spiblink/config.orig
deleted file mode 100644
index af7b0a5..0000000
--- a/examples/spiblink/config.orig
+++ /dev/null
@@ -1,23 +0,0 @@
-#
-# Automatically generated file; DO NOT EDIT.
-# AVR-IOE configuration
-#
-MMCU="atmega328p"
-ATMEGA328P=y
-# ATTINY85 is not set
-F_CPU=16000
-
-#
-# Compilation options
-#
-GNUTOOLCHAIN_PREFIX="avr-"
-CONFCFLAGS="-Os -ffunction-sections -fdata-sections -fshort-enums -Wall"
-MCUSUPPORT_IOPORTS=y
-# CONFIG_IOPORTS is not set
-MCUSUPPORT_PCINT0=y
-MCUSUPPORT_PCINT1=y
-MCUSUPPORT_PCINT2=y
-MCUSUPPORT_SPI=y
-CONFIG_SPI=y
-MCUSUPPORT_USART=y
-# CONFIG_USART is not set
diff --git a/examples/spiblink/master.c b/examples/spiblink/master.c
deleted file mode 100644
index 1cc4289..0000000
--- a/examples/spiblink/master.c
+++ /dev/null
@@ -1,20 +0,0 @@
-#include <avr/io.h>
-#include <util/delay.h>
-#include <spi.h>
-
-int main() {
-    DDRB |= _BV(DDB1) | _BV(DDB2);
-    PORTC |= _BV(PORTC1);
-    spi_init(SPI_MODE_MASTER);
-    SREG |= _BV(7);
-    while (1) {
-        if (PINC & _BV(PINC1)) {
-            PORTB &= ~_BV(PORTB1);
-        } else {
-            PORTB |= _BV(PORTB1);
-        }
-        PORTB &= ~_BV(PORTB2);
-        spi_send(!(PINC & _BV(PINC1)));
-        PORTB |= _BV(PORTB2);
-    }
-}
diff --git a/examples/spiblink/master/.config b/examples/spiblink/master/.config
new file mode 100644
index 0000000..08e8924
--- /dev/null
+++ b/examples/spiblink/master/.config
@@ -0,0 +1,35 @@
+#
+# Automatically generated file; DO NOT EDIT.
+# AVR-IOE spiblink master configuration
+#
+SPIBLINK_MASTER_DEFAULTS=y
+CONFIG_BUTTON_IO="IO_C1"
+CONFIG_LED_IO="IO_B0"
+MMCU="atmega328p"
+ATMEGA328P=y
+# ATMEGA168A is not set
+# ATTINY85 is not set
+# ATTINY4313 is not set
+F_CPU=16000
+
+#
+# Compilation options
+#
+CHOST="avr-"
+CCFLAGS="-Os -ffunction-sections -fdata-sections -fshort-enums -Wall"
+CLDFLAGS=""
+CBUILD=""
+BUILD_CFLAGS="-Wall"
+BUILD_LDFLAGS=""
+# CONFIG_ERRORS is not set
+MCUSUPPORT_IOPORTS=y
+CONFIG_IOPORTS=y
+MCUSUPPORT_PCINT0=y
+MCUSUPPORT_PCINT1=y
+MCUSUPPORT_PCINT2=y
+# CONFIG_IOPORTS_PCINT is not set
+MCUSUPPORT_SPI=y
+CONFIG_SPI=y
+MCUSUPPORT_USART=y
+# CONFIG_USART is not set
+# CONFIG_TIMERS is not set
diff --git a/examples/spiblink/master/Kconfig b/examples/spiblink/master/Kconfig
new file mode 100644
index 0000000..dc9e8b5
--- /dev/null
+++ b/examples/spiblink/master/Kconfig
@@ -0,0 +1,20 @@
+mainmenu "AVR-IOE spiblink master configuration"
+
+# We need CONFIG_IOPORTS, but we don't care about anything else.
+config SPIBLINK_MASTER_DEFAULTS
+	bool
+	default y
+	select CONFIG_SPI
+	select CONFIG_IOPORTS
+
+config CONFIG_BUTTON_IO
+	string "Input pin used to connect button"
+	depends on SPIBLINK_MASTER_DEFAULTS
+	default "IO_C1"
+
+config CONFIG_LED_IO
+	string "Output pin used to connect test led"
+	depends on SPIBLINK_MASTER_DEFAULTS
+	default "IO_B0"
+
+source "../../../ioe.Kconfig"
diff --git a/examples/spiblink/master/Makefile b/examples/spiblink/master/Makefile
new file mode 100644
index 0000000..d412e92
--- /dev/null
+++ b/examples/spiblink/master/Makefile
@@ -0,0 +1,6 @@
+EXAMPLE_NAME = spiblink_master
+EXAMPLE_PATH = spiblink/master
+SRC = master.c
+
+IOEROOT=../../../
+include ../../examples.mk
diff --git a/examples/spiblink/master/master.c b/examples/spiblink/master/master.c
new file mode 100644
index 0000000..73a8aa9
--- /dev/null
+++ b/examples/spiblink/master/master.c
@@ -0,0 +1,17 @@
+#include <avr/io.h>
+#include <util/delay.h>
+#include <ioport.h>
+#include <spi.h>
+
+int main() {
+	io_setin(CONFIG_BUTTON_IO, IO_PULLUP);
+	io_setout(CONFIG_LED_IO);
+
+	spi_init(SPI_MODE_MASTER);
+	// SREG |= _BV(7); // Enable interrupts TODO I don't think that we need this
+
+	while (1) {
+		io_set(CONFIG_LED_IO, io_get(CONFIG_BUTTON_IO));
+		spi_send(io_get(CONFIG_BUTTON_IO));
+	}
+}
diff --git a/examples/spiblink/slave.c b/examples/spiblink/slave.c
deleted file mode 100644
index 91a8237..0000000
--- a/examples/spiblink/slave.c
+++ /dev/null
@@ -1,21 +0,0 @@
-#include <avr/io.h>
-#include <util/delay.h>
-#include <spi.h>
-
-void receive(uint8_t data);
-
-int main() {
-    DDRB |= _BV(DDB1);
-    spi_receive = receive;
-    spi_init(SPI_MODE_SLAVE);
-    SREG |= _BV(7);
-    while (1) {
-    }
-}
-
-void receive(uint8_t data) {
-    if (data)
-        PORTB |= _BV(PORTB1);
-    else
-        PORTB &= ~_BV(PORTB1);
-}
diff --git a/examples/spiblink/slave/.config b/examples/spiblink/slave/.config
new file mode 100644
index 0000000..31c10ea
--- /dev/null
+++ b/examples/spiblink/slave/.config
@@ -0,0 +1,44 @@
+#
+# Automatically generated file; DO NOT EDIT.
+# AVR-IOE spiblink slave configuration
+#
+SPIBLINK_SLAVE_DEFAULTS=y
+CONFIG_BLINK_IO="IO_B0"
+MMCU="atmega328p"
+ATMEGA328P=y
+# ATMEGA168A is not set
+# ATTINY85 is not set
+# ATTINY4313 is not set
+F_CPU=16000
+
+#
+# Compilation options
+#
+CHOST="avr-"
+CCFLAGS="-Os -ffunction-sections -fdata-sections -fshort-enums -Wall"
+CLDFLAGS=""
+CBUILD=""
+BUILD_CFLAGS="-Wall"
+BUILD_LDFLAGS=""
+CONFIG_ERRORS=y
+
+#
+# Errors handling
+#
+# CONFIG_EH_RESTART is not set
+# CONFIG_EH_HANG is not set
+# CONFIG_EH_LED is not set
+# CONFIG_ERROR_MESSAGES is not set
+# CONFIG_ERROR_CALLBACK is not set
+# CONFIG_CHECK_ARGUMENTS is not set
+MCUSUPPORT_IOPORTS=y
+CONFIG_IOPORTS=y
+MCUSUPPORT_PCINT0=y
+MCUSUPPORT_PCINT1=y
+MCUSUPPORT_PCINT2=y
+# CONFIG_IOPORTS_PCINT is not set
+MCUSUPPORT_SPI=y
+CONFIG_SPI=y
+MCUSUPPORT_USART=y
+# CONFIG_USART is not set
+# CONFIG_TIMERS is not set
diff --git a/examples/spiblink/slave/Kconfig b/examples/spiblink/slave/Kconfig
new file mode 100644
index 0000000..c264b9f
--- /dev/null
+++ b/examples/spiblink/slave/Kconfig
@@ -0,0 +1,15 @@
+mainmenu "AVR-IOE spiblink slave configuration"
+
+# We need CONFIG_IOPORTS, but we don't care about anything else.
+config SPIBLINK_SLAVE_DEFAULTS
+	bool
+	default y
+	select CONFIG_SPI
+	select CONFIG_IOPORTS
+
+config CONFIG_BLINK_IO
+	string "Output pin used to connect led"
+	depends on SPIBLINK_SLAVE_DEFAULTS
+	default "IO_B0"
+
+source "../../../ioe.Kconfig"
diff --git a/examples/spiblink/slave/Makefile b/examples/spiblink/slave/Makefile
new file mode 100644
index 0000000..7410058
--- /dev/null
+++ b/examples/spiblink/slave/Makefile
@@ -0,0 +1,6 @@
+EXAMPLE_NAME = spiblink_slave
+EXAMPLE_PATH = spiblink/slave
+SRC = slave.c
+
+IOEROOT=../../../
+include ../../examples.mk
diff --git a/examples/spiblink/slave/slave.c b/examples/spiblink/slave/slave.c
new file mode 100644
index 0000000..2a65323
--- /dev/null
+++ b/examples/spiblink/slave/slave.c
@@ -0,0 +1,19 @@
+#include <avr/io.h>
+#include <util/delay.h>
+#include <ioport.h>
+#include <spi.h>
+
+void receive(uint8_t data);
+
+int main() {
+	io_setout(CONFIG_BLINK_IO);
+
+	spi_receive = receive;
+	spi_init(SPI_MODE_SLAVE);
+	SREG |= _BV(7); // Enable global interrupts
+	while (1);  // Busy loop
+}
+
+void receive(uint8_t data) {
+	io_set(CONFIG_BLINK_IO, data);
+}
diff --git a/examples/usartecho/Makefile b/examples/usartecho/Makefile
index 93a2783..c910843 100644
--- a/examples/usartecho/Makefile
+++ b/examples/usartecho/Makefile
@@ -1,4 +1,5 @@
 EXAMPLE_NAME = usartecho
 SRC = echo.c
 
+IOEROOT=../../
 include ../examples.mk
diff --git a/include/ioport.h b/include/ioport.h
index 95b6205..1b6f806 100644
--- a/include/ioport.h
+++ b/include/ioport.h
@@ -30,7 +30,7 @@ static inline void io_set(uint8_t group, uint8_t mask, int8_t val) {
 }
 
 static inline void io_setin(uint8_t group, uint8_t mask,
-                            enum ioInResistor resistor) {
+							enum ioInResistor resistor) {
 	IO_DDR(group) &= ~mask;
 	if (resistor == IO_PULLUP)
 		IO_PORT(group) |= mask;
diff --git a/include/spi.h b/include/spi.h
index c4c003b..68b90ce 100644
--- a/include/spi.h
+++ b/include/spi.h
@@ -1,63 +1,60 @@
-// vim:ts=4:sw=4:sts=4:expandtab
 #include <avr/io.h>
 #include <avr/interrupt.h>
 #include <stdint.h>
 
 #include "mcu/mcu_def.h"
-#include "tasks.h"
 
 #ifndef _IOE_SPI_H_
 #define _IOE_SPI_H_
 #ifdef CONFIG_SPI
 
 enum spiMode {
-    SPI_MODE_MASTER,
-    SPI_MODE_SLAVE
+	SPI_MODE_MASTER,
+	SPI_MODE_SLAVE
 };
 
 volatile extern int8_t _spi_busy;
-volatile extern Mutex spi_mutex;
 
 static inline void spi_init(enum spiMode mode) {
-    _spi_busy = 0;
-    if (mode == SPI_MODE_MASTER) {
-        // Set MOSI and SCK output
-        DDR_SPI |= _BV(DD_MOSI) | _BV(DD_SCLK);
-        // Set MISO pull up resistor
-        PORT_SPI |= _BV(PORT_MISO);
-        // Enable SPI master, set clock rate fck/16 and enable SPI interrupt
-        SPCR = _BV(SPE) | _BV(SPIE) | _BV(MSTR) | _BV(SPR0);
-    } else {
-        // Set MISO as output
-        DDR_SPI |= _BV(DD_MISO);
-        // Set SCLK and MOSI pull up resistor
-        PORT_SPI |= _BV(PORT_SCLK) | _BV(PORT_MOSI);
-        // Enable SPI and interrupt
-        SPCR = _BV(SPE) | _BV(SPIE);
-    }
+	_spi_busy = 0;
+	if (mode == SPI_MODE_MASTER) {
+		// Set MOSI and SCK output
+		DDR_SPI |= _BV(DD_MOSI) | _BV(DD_SCLK);
+		// Set MISO pull up resistor
+		PORT_SPI |= _BV(PORT_MISO);
+		// Enable SPI master, set clock rate fck/16 and enable SPI interrupt
+		SPCR = _BV(SPE) | _BV(SPIE) | _BV(MSTR) | _BV(SPR0);
+	} else {
+		// Set MISO as output
+		DDR_SPI |= _BV(DD_MISO);
+		// Set SCLK and MOSI pull up resistor
+		PORT_SPI |= _BV(PORT_SCLK) | _BV(PORT_MOSI);
+		// Enable SPI and interrupt
+		SPCR = _BV(SPE) | _BV(SPIE);
+	}
 }
 
 static inline int8_t spi_busy(void) {
-    return _spi_busy;
+	return _spi_busy;
 }
 
 static inline void spi_join(void) {
-    task_delay_till(&_spi_busy, 0);
+	while(!_spi_busy) ;
 }
 
 static inline void spi_transfer(uint8_t data) {
-    _spi_busy = 1;
-    SPDR = data;
+	_spi_busy = 1;
+	SPDR = data;
 }
 
 static inline uint8_t spi_send(uint8_t data) {
-    spi_transfer(data);
-    task_delay_till(&_spi_busy, 0);
-    return SPDR;
+	spi_transfer(data);
+	spi_join();
+	return SPDR;
 }
 
 static inline void spi_expose(uint8_t data) {
-    SPDR = data;
+	SPDR = data;
 }
 
 extern void (*spi_receive)(uint8_t data);
diff --git a/src/spi.c b/src/spi.c
index adf858d..d7af297 100644
--- a/src/spi.c
+++ b/src/spi.c
@@ -3,15 +3,14 @@
 #ifdef CONFIG_SPI
 
 volatile int8_t _spi_busy;
-volatile Mutex spi_mutex;
 
 void (*spi_receive) (uint8_t data) = 0;
 
 ISR(SPI_STC_vect, ISR_BLOCK) {
-    _spi_busy = 0;
-    if (spi_receive != NULL) {
-        spir_w(SPDR);
-    }
+	_spi_busy = 0;
+	if (spi_receive != 0) {
+		spi_receive(SPDR);
+	}
 }
 
 #endif /* CONFIG_SPI */