Cleanup repository

I don't have enough time to implement everything so I am cutting
losses. I might return to it later on, but now I push forward to
implement at least base features.

6 files changed, 66 insertions, 255 deletions

diff --git a/Kconfig b/Kconfig
index ebafb5b..83080bb 100644
--- a/Kconfig
+++ b/Kconfig
@@ -1,125 +1,117 @@
 mainmenu "AVR-IOE configuration"
 
 config IOEROOT
-    string
-    option env="IOEROOT"
+	string
+	option env="IOEROOT"
 source "$IOEROOT/include/mcu/Kconfig"
 
 config F_CPU
-    int "CPU frequency in kHz (F_CPU)"
-    default 16000
+	int "CPU frequency in kHz (F_CPU)"
+	default 16000
 
 # Toolchain #####################################################################
 
 menu "Compilation options"
 
 config GNUTOOLCHAIN_PREFIX
-    string "GNU Toolchain prefix"
-    default "avr-"
+	string "GNU Toolchain prefix"
+	default "avr-"
 
 config CONFCFLAGS
-    string "Compilation CFlags"
-    default "-Os -ffunction-sections -fdata-sections -fshort-enums -Wall"
+	string "Compilation CFlags"
+	default "-Os -ffunction-sections -fdata-sections -fshort-enums -Wall"
 
 endmenu
 
-# Tracing and error handling ####################################################
-
-menu "Tracing and error handling"
+# Error handling ################################################################
 
 config CONFIG_ERRORS
-    bool "Errors support"
+	bool "Errors support"
+	default y
 
 if CONFIG_ERRORS
 
 menu "Errors handling"
 
 config CONFIG_EH_RESTART
-    bool "Restart MCU on error detection"
+	bool "Restart MCU on error detection"
+	default y
 
 config CONFIG_EH_MEMORY
-    bool "TODO: Write error code and possible stack trase to EEPROM"
+	bool "(TODO) Write error code and possible stack trase to EEPROM"
+	default n
 
 config CONFIG_EH_LED
-    bool "Signal error detection by LED"
-    depends on CONFIG_IOPORTS
+	bool "Signal error detection by LED"
+	depends on CONFIG_IOPORTS
+	default n
 
 config CONFIG_EH_LED_IOPIN
-    string "Error detection led output pin"
-    depends on CONFIG_EH_LED
-    default "IO_B0"
-    ---help---
-    Specifies IO pin which will be pulled up on error detection.
-    This string should be valid IO port (for example "IO_B0") or pair of group
-    mask divided by comma (for example "IO_B, _BV(0)").
+	string "Error detection led output pin"
+	depends on CONFIG_EH_LED
+	default "IO_B0"
+	---help---
+	Specifies IO pin which will be pulled up on error detection.
+	This string should be valid IO port (for example "IO_B0") or pair of group
+	mask divided by comma (for example "IO_B, _BV(0)").
 
 config CONFIG_EH_USART
-    bool "Send error informations by UART"
-    depends on CONFIG_USART && CONFIG_USART_OUTPUT_BUFFER
+	bool "Send error informations by UART"
+	depends on CONFIG_USART && CONFIG_USART_OUTPUT_BUFFER
+	default n
 
 endmenu
 
 config CONFIG_CHECK_ARGUMENTS
-    bool "Check arguments for all functions in library"
-
-endif
-
-config CONFIG_TRACING
-    bool "TODO: Tracing support"
-
-if CONFIG_TRACING
-
-config CONFIG_TRACE_FUNCTIONCALL
-    bool "TODO: Trace all function calls in library"
+	bool "Check arguments for all functions in library"
+	default n
 
 endif
 
-endmenu
-
 # IO Ports ######################################################################
 
 config MCUSUPPORT_IOPORTS
-    bool
-    default n
+	bool
+	default n
 
 config CONFIG_IOPORTS
-    bool "Input/Output ports"
-    default y
-    depends on MCUSUPPORT_IOPORTS
+	bool "Input/Output ports"
+	default y
+	depends on MCUSUPPORT_IOPORTS
 
 config MCUSUPPORT_PCINT0
-    bool
-    default n
+	bool
+	default n
 config MCUSUPPORT_PCINT1
-    bool
-    default n
+	bool
+	default n
 config MCUSUPPORT_PCINT2
-    bool
-    default n
+	bool
+	default n
 
 config CONFIG_IOPORTS_PCINT
-    bool "Input/Output ports change interrupts"
+	bool "Input/Output ports change interrupts"
 	depends on CONFIG_IOPORTS
-    depends on MCUSUPPORT_PCINT0 || MCUSUPPORT_PCINT1 || MCUSUPPORT_PCINT2
+	depends on MCUSUPPORT_PCINT0 || MCUSUPPORT_PCINT1 || MCUSUPPORT_PCINT2
 
 # SPI ###########################################################################
 
 config MCUSUPPORT_SPI
-    bool
-    default n
+	bool
+	default n
 
 config CONFIG_SPI
-	bool "Serial peripheral interface"
-    depends on MCUSUPPORT_SPI
+	bool "SPI (Serial peripheral interface)"
+	depends on MCUSUPPORT_SPI
 
 # USART #########################################################################
 config MCUSUPPORT_USART
-    bool
-    default n
+	bool
+	default n
 
 menuconfig CONFIG_USART
-	bool "Universal synchronous/asynchronous transceiver"
-    depends on MCUSUPPORT_USART
+	bool "USART (Universal synchronous/asynchronous transceiver)"
+	depends on MCUSUPPORT_USART
 
 if CONFIG_USART
 
@@ -145,7 +137,7 @@ config CONFIG_USART_PARITY
 config CONFIG_USART_DATABITS
 	int "Data bits"
 	default 8
-    range 5 8
+	range 5 8
 
 choice USART_STOPBIT_C
 	prompt "Stop bit"
@@ -166,7 +158,7 @@ config CONFIG_USART_OUTPUT_BUFFER
 config CONFIG_USART_OUTBUFFER_SIZE
 	int "Output buffer size in bytes." if CONFIG_USART_OUTPUT_BUFFER
 	default 0 if ! CONFIG_USART_OUTPUT_BUFFER
-    range 1 512000 if CONFIG_USART_OUTPUT_BUFFER
+	range 1 512000 if CONFIG_USART_OUTPUT_BUFFER
 	default 32
 
 choice USART_OUTBUFFER_MODE_C
@@ -190,7 +182,7 @@ config CONFIG_USART_INPUT_BUFFER
 config CONFIG_USART_INBUFFER_SIZE
 	int "Input buffer size in bytes." if CONFIG_USART_INPUT_BUFFER
 	default 0 if ! CONFIG_USART_INPUT_BUFFER
-    range 1 512000 if CONFIG_USART_INPUT_BUFFER
+	range 1 512000 if CONFIG_USART_INPUT_BUFFER
 	default 32
 
 choice USART_INBUFFER_MODE_C
@@ -209,70 +201,16 @@ config CONFIG_USART_INBUFFER_MODE
 	default 0
 
 config CONFIG_USART_OUTFILE
-    bool "STD FILE support for output"
-    depends on CONFIG_USART_OUTPUT_BUFFER
+	bool "STD FILE support for output"
+	depends on CONFIG_USART_OUTPUT_BUFFER
 
 config CONFIG_USART_INFILE
-    bool "STD FILE support for input"
-    depends on CONFIG_USART_INPUT_BUFFER
+	bool "STD FILE support for input"
+	depends on CONFIG_USART_INPUT_BUFFER
 
 endif
 
 # Timers ########################################################################
 
 config CONFIG_TIMERS
-    bool "Timers"
-
-# Tasks #########################################################################
-
-menuconfig CONFIG_TASKS
-    bool "Taks support"
-    depends on CONFIG_TIMERS
-
-if CONFIG_TASKS
-
-config CONFIG_TASKS_TIME
-    bool "Measure approximate real time"
-
-choice TASKS_TIMER
-    prompt "Timer used for tasks planning and interrupts"
-    default TASKS_TIMER_2
-
-config TASKS_TIMER_0
-    bool "Timer0 (8-bit)"
-
-config TASKS_TIMER_1
-    bool "Timer1 (16-bit)"
-
-config TASKS_TIMER_2
-    bool "Timer2 (8-bit asynchronous)"
-
-endchoice
-
-endif
-
-# Jobs ##########################################################################
-
-menuconfig CONFIG_JOBS
-    bool "Jobs support"
-    ---help---
-    Job support allows you to plan and execute functions periodically. This is
-    designed for realtime control.
-
-if CONFIG_JOBS
-
-choice JOBS_DURATION
-    prompt "Jobs duration source"
-
-config JOBS_DURATION_CONSTANT
-    bool "Predefined constants"
-
-config JOBS_DURATION_PREV
-    bool "Previous execution time"
-
-config JOBS_DURATION_MAX
-    bool "Maximum previous time"
-
-endchoice
-
-endif 
+	bool "Timers"
diff --git a/examples/blink/blink.c b/examples/blink/blink.c
index 6a81aee..912ce80 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(IO_B0);
 
-    while (1) {
-        io_hight(IO_B0);
-        _delay_ms(500);
-        io_low(IO_B0);
-        _delay_ms(500);
-    }
+	while (1) {
+		io_hight(IO_B0);
+		_delay_ms(500);
+		io_low(IO_B0);
+		_delay_ms(500);
+	}
 }
diff --git a/include/jobs.h b/include/jobs.h
deleted file mode 100644
index d2abbdc..0000000
--- a/include/jobs.h
+++ /dev/null
@@ -1,8 +0,0 @@
-#include <stdint.h>
-
-#ifndef _IOE_JOBS_H_
-#define _IOE_JOBS_H_
-
-
-
-#endif /* _IOE_JOBS_H_ */
diff --git a/include/sys/mutex.h b/include/sys/mutex.h
deleted file mode 100644
index f682e02..0000000
--- a/include/sys/mutex.h
+++ /dev/null
@@ -1,32 +0,0 @@
-#include <avr/io.h>
-#include <stdint.h>
-#include <stdlib.h>
-
-#include "../tasks.h"
-
-#ifndef _IOE_SYS_MUTEX_H_
-#define _IOE_SYS_MUTEX_H_
-#ifdef CONFIG_IOE_MUTEX
-
-#define MUTEX_F_TIMED (1<<0)
-#define MUTEX_F_TAKEN (1<<7)
-#define mutex_t volatile struct Mutex
-struct Mutex {
-    uint8_t flags;
-    Task *_task_took;
-};
-int8_t mutex_init(struct Mutex * mtx);
-int8_t mutex_free(struct Mutex * mtx);
-int8_t mutex_take(struct Mutex * mtx, uint16_t timeout);
-int8_t mutex_give(struct Mutex * mtx);
-
-#else /* CONFIG_IOE_MUTEX */
-
-#define mutex_t struct { }
-#define mutex_init(MTX, FLAGS)
-#define mutex_free(MTX)
-#define mutex_take(MTX, TIMEOUT)
-#define mutex_give(MTX);
-
-#endif /* CONFIG_IOE_MUTEX */
-#endif /* _IOE_SYS_MUTEX_H_ */
diff --git a/include/sys/semaphore.h b/include/sys/semaphore.h
deleted file mode 100644
index 0a25af3..0000000
--- a/include/sys/semaphore.h
+++ /dev/null
@@ -1,31 +0,0 @@
-#include <avr/io.h>
-#include <stdint.h>
-#include <stdlib.h>
-
-#ifndef _IOE_SYS_SEMAPHORE_H_
-#define _IOE_SYS_SEMAPHORE_H_
-#ifdef CONFIG_IOE_SEMAPHORE
-
-#define semaphore_t volatile struct Semaphore
-struct Semaphore {
-    uint8_t flags;
-    uint8_t _count;
-    Task **_tasks;
-    uint8_t _tasks_len;
-};
-int8_t semaphore_init(struct Semaphore * sem, uint8_t count);
-int8_t semaphore_free(struct Semaphore * sem);
-int8_t semaphore_take(struct Semaphore * sem, uint16_t timeout);
-int8_t semaphore_give(Semaphore * sem);
-
-#else /* CONFIG_IOE_SEMAPHORE */
-
-#define semaphore_t struct { }
-// TODO implement for single processor
-#define semaphore_init(SEM, FLAGS, COUNT)
-#define semaphore_free(SEM)
-#define semaphore_take(SEM, TIMEOUT)
-#define semaphore_give(SEM)
-
-#endif /* CONFIG_IOE_SEMAPHORE */
-#endif /* _IOE_SYS_SEMAPHORE_H_ */
diff --git a/include/tasks.h b/include/tasks.h
deleted file mode 100644
index b62b093..0000000
--- a/include/tasks.h
+++ /dev/null
@@ -1,56 +0,0 @@
-#include <avr/io.h>
-#include <util/delay.h>
-#include <avr/interrupt.h>
-#include <stdint.h>
-#include <stdlib.h>
-
-#include "mcu/mcu_def.h"
-#include "timer.h"
-
-#ifndef _IOE_TASKS_H_
-#define _IOE_TASKS_H_
-
-#ifdef CONFIG_IOE_TASKS
-
-#ifndef CONFIG_IOE_TIMERS
-#error "To use tasks you must enable timers (CONFIG_IOE_TIMERS)."
-#endif
-
-int8_t tasks_run(void);
-
-union StackPointer {
-    uint8_t lh8[2];
-    uint16_t lh16;
-};
-
-struct Task {
-    uint8_t flags;
-    void (*func) (void *data);
-    void *data;
-    uint8_t _rflags;
-    uint8_t _stack_size;
-    union StackPointer _sp;
-};
-typedef task_t volatile struct Task;
-
-int8_t task_spawn(struct Task * t, uint8_t stack_size);
-Task *tasks_self(void);
-void taks_exit(void);
-int8_t task_kill(struct Task * t);
-int8_t task_safe(void);
-int8_t task_unsafe(void);
-
-int8_t task_delay(uint16_t cycles);
-int8_t task_delay_ms(uint16_t ms);
-int8_t task_delay_till(volatile int8_t * boolean, uint16_t ms);
-
-#else /* CONFIG_IOE_TASKS */
-
-#define task_safe()
-#define task_unsafe()
-#define task_delay(CC) _delay_us(CC) // TODO this should be cycles
-#define task_delay_ms(MS) _delay_ms(MS)
-int8_t task_delay_till(volatile int8_t * boolean, uint16_t ms);
-
-#endif /* CONFIG_IOE_TASKS */
-#endif /* _IOE_TASKS_H_ */