Move cw-example/ into fsm/

13 files changed, 0 insertions, 1297 deletions

diff --git a/src/cw-example/FreeRTOS b/src/cw-example/FreeRTOS
deleted file mode 120000
index 51f4e96..0000000
--- a/src/cw-example/FreeRTOS
+++ /dev/null
@@ -1 +0,0 @@
-../FreeRTOS
\ No newline at end of file
diff --git a/src/cw-example/FreeRTOSConfig.h b/src/cw-example/FreeRTOSConfig.h
deleted file mode 100644
index 11427d8..0000000
--- a/src/cw-example/FreeRTOSConfig.h
+++ /dev/null
@@ -1,165 +0,0 @@
-/*

-    FreeRTOS V8.0.0:rc2 - Copyright (C) 2014 Real Time Engineers Ltd. 

-    All rights reserved

-

-    VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.

-

-    ***************************************************************************

-     *                                                                       *

-     *    FreeRTOS provides completely free yet professionally developed,    *

-     *    robust, strictly quality controlled, supported, and cross          *

-     *    platform software that has become a de facto standard.             *

-     *                                                                       *

-     *    Help yourself get started quickly and support the FreeRTOS         *

-     *    project by purchasing a FreeRTOS tutorial book, reference          *

-     *    manual, or both from: http://www.FreeRTOS.org/Documentation        *

-     *                                                                       *

-     *    Thank you!                                                         *

-     *                                                                       *

-    ***************************************************************************

-

-    This file is part of the FreeRTOS distribution.

-

-    FreeRTOS is free software; you can redistribute it and/or modify it under

-    the terms of the GNU General Public License (version 2) as published by the

-    Free Software Foundation >>!AND MODIFIED BY!<< the FreeRTOS exception.

-

-    >>! NOTE: The modification to the GPL is included to allow you to distribute

-    >>! a combined work that includes FreeRTOS without being obliged to provide

-    >>! the source code for proprietary components outside of the FreeRTOS

-    >>! kernel.

-

-    FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY

-    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS

-    FOR A PARTICULAR PURPOSE.  Full license text is available from the following

-    link: http://www.freertos.org/a00114.html

-

-    1 tab == 4 spaces!

-

-    ***************************************************************************

-     *                                                                       *

-     *    Having a problem?  Start by reading the FAQ "My application does   *

-     *    not run, what could be wrong?"                                     *

-     *                                                                       *

-     *    http://www.FreeRTOS.org/FAQHelp.html                               *

-     *                                                                       *

-    ***************************************************************************

-

-    http://www.FreeRTOS.org - Documentation, books, training, latest versions,

-    license and Real Time Engineers Ltd. contact details.

-

-    http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,

-    including FreeRTOS+Trace - an indispensable productivity tool, a DOS

-    compatible FAT file system, and our tiny thread aware UDP/IP stack.

-

-    http://www.OpenRTOS.com - Real Time Engineers ltd license FreeRTOS to High

-    Integrity Systems to sell under the OpenRTOS brand.  Low cost OpenRTOS

-    licenses offer ticketed support, indemnification and middleware.

-

-    http://www.SafeRTOS.com - High Integrity Systems also provide a safety

-    engineered and independently SIL3 certified version for use in safety and

-    mission critical applications that require provable dependability.

-

-    1 tab == 4 spaces!

-*/

-

-

-#ifndef FREERTOS_CONFIG_H

-#define FREERTOS_CONFIG_H

-

-/*-----------------------------------------------------------

- * Application specific definitions.

- *

- * These definitions should be adjusted for your particular hardware and

- * application requirements.

- *

- * THESE PARAMETERS ARE DESCRIBED WITHIN THE 'CONFIGURATION' SECTION OF THE

- * FreeRTOS API DOCUMENTATION AVAILABLE ON THE FreeRTOS.org WEB SITE.

- *

- * See http://www.freertos.org/a00110.html.

- *----------------------------------------------------------*/

-

-/* Ensure stdint is only used by the compiler, and not the assembler. */

-//#ifdef __ICCARM__

-	#include <stdint.h>

-	extern uint32_t SystemCoreClock;

-//#endif

-

-#define configUSE_PREEMPTION			1

-#define configUSE_IDLE_HOOK				0 // Default: 1

-#define configUSE_TICK_HOOK				0 // Default: 1

-#define configCPU_CLOCK_HZ				( SystemCoreClock )

-#define configTICK_RATE_HZ				( ( portTickType ) 1000 )

-#define configMAX_PRIORITIES			( 5 )

-#define configMINIMAL_STACK_SIZE		( ( unsigned short ) 130 )

-#define configTOTAL_HEAP_SIZE			( ( size_t ) ( 75 * 1024 ) )

-#define configMAX_TASK_NAME_LEN			( 10 )

-#define configUSE_TRACE_FACILITY		1

-#define configUSE_16_BIT_TICKS			0

-#define configIDLE_SHOULD_YIELD			1

-#define configUSE_MUTEXES				1

-#define configQUEUE_REGISTRY_SIZE		8

-#define configCHECK_FOR_STACK_OVERFLOW	2 // Default: 2

-#define configUSE_RECURSIVE_MUTEXES		1

-#define configUSE_MALLOC_FAILED_HOOK	0 // Default: 1

-#define configUSE_APPLICATION_TASK_TAG	0

-#define configUSE_COUNTING_SEMAPHORES	1

-#define configGENERATE_RUN_TIME_STATS	0

-

-/* Co-routine definitions. */

-#define configUSE_CO_ROUTINES 		0

-#define configMAX_CO_ROUTINE_PRIORITIES ( 2 )

-

-/* Software timer definitions. */

-#define configUSE_TIMERS				1

-#define configTIMER_TASK_PRIORITY		( 2 )

-#define configTIMER_QUEUE_LENGTH		10

-#define configTIMER_TASK_STACK_DEPTH	( configMINIMAL_STACK_SIZE * 2 )

-

-/* Set the following definitions to 1 to include the API function, or zero

-to exclude the API function. */

-#define INCLUDE_vTaskPrioritySet		1

-#define INCLUDE_uxTaskPriorityGet		1

-#define INCLUDE_vTaskDelete				1

-#define INCLUDE_vTaskCleanUpResources	1

-#define INCLUDE_vTaskSuspend			1

-#define INCLUDE_vTaskDelayUntil			1

-#define INCLUDE_vTaskDelay				1

-

-/* Cortex-M specific definitions. */

-#ifdef __NVIC_PRIO_BITS

-	/* __BVIC_PRIO_BITS will be specified when CMSIS is being used. */

-	#define configPRIO_BITS       		__NVIC_PRIO_BITS

-#else

-	#define configPRIO_BITS       		4        /* 15 priority levels */

-#endif

-

-/* The lowest interrupt priority that can be used in a call to a "set priority"

-function. */

-#define configLIBRARY_LOWEST_INTERRUPT_PRIORITY			0xf

-

-/* The highest interrupt priority that can be used by any interrupt service

-routine that makes calls to interrupt safe FreeRTOS API functions.  DO NOT CALL

-INTERRUPT SAFE FREERTOS API FUNCTIONS FROM ANY INTERRUPT THAT HAS A HIGHER

-PRIORITY THAN THIS! (higher priorities are lower numeric values. */

-#define configLIBRARY_MAX_SYSCALL_INTERRUPT_PRIORITY	5

-

-/* Interrupt priorities used by the kernel port layer itself.  These are generic

-to all Cortex-M ports, and do not rely on any particular library functions. */

-#define configKERNEL_INTERRUPT_PRIORITY 		( configLIBRARY_LOWEST_INTERRUPT_PRIORITY << (8 - configPRIO_BITS) )

-/* !!!! configMAX_SYSCALL_INTERRUPT_PRIORITY must not be set to zero !!!!

-See http://www.FreeRTOS.org/RTOS-Cortex-M3-M4.html. */

-#define configMAX_SYSCALL_INTERRUPT_PRIORITY 	( configLIBRARY_MAX_SYSCALL_INTERRUPT_PRIORITY << (8 - configPRIO_BITS) )

-	

-/* Normal assert() semantics without relying on the provision of an assert.h

-header file. */

-#define configASSERT( x ) if( ( x ) == 0 ) { taskDISABLE_INTERRUPTS(); for( ;; ); }	

-	

-/* Definitions that map the FreeRTOS port interrupt handlers to their CMSIS

-standard names. */

-#define vPortSVCHandler SVC_Handler

-#define xPortPendSVHandler PendSV_Handler

-#define xPortSysTickHandler SysTick_Handler

-

-#endif /* FREERTOS_CONFIG_H */

-

diff --git a/src/cw-example/Makefile b/src/cw-example/Makefile
deleted file mode 100644
index 8a6e463..0000000
--- a/src/cw-example/Makefile
+++ /dev/null
@@ -1,119 +0,0 @@
-###
-# GNU ARM Embedded Toolchain
-CC=arm-none-eabi-gcc
-LD=arm-none-eabi-ld
-AR=arm-none-eabi-ar
-AS=arm-none-eabi-as
-CP=arm-none-eabi-objcopy
-OD=arm-none-eabi-objdump
-SIZE=arm-none-eabi-size
-
-###
-# Directory Structure
-BINDIR=bin
-SRCDIR=.
-
-###
-# Find source files
-ASOURCES=$(shell find -L $(SRCDIR) -name '*.s')
-CSOURCES+=$(shell find -L $(SRCDIR) -name '*.c')
-# Find header directories
-INC=$(shell find -L . -name '*.h' -exec dirname {} \; | uniq)
-INCLUDES=$(INC:%=-I%)
-# Create object list
-OBJECTS=$(ASOURCES:%.s=%.o)
-OBJECTS+=$(CSOURCES:%.c=%.o)
-# Define output files ELF & IHEX
-BINELF=outp.elf
-BINHEX=outp.hex
-
-###
-# MCU FLAGS
-MCFLAGS=-mcpu=cortex-m4 -mthumb -mlittle-endian \
--mfpu=fpv4-sp-d16 -mfloat-abi=softfp -mthumb-interwork
-# COMPILE FLAGS
-DEFS=-DUSE_STDPERIPH_DRIVER -DSTM32F4XX -DARM_MATH_CM4 -D__FPU_PRESENT=1
-CFLAGS  =-Wall -ggdb -std=c99 -c $(MCFLAGS) $(DEFS) $(INCLUDES)
-# LINKER FLAGS
-LDSCRIPT= bsp/stm32_flash.ld
-LDFLAGS =-T $(LDSCRIPT) --specs=nosys.specs $(MCFLAGS)
-
-###
-# Optimizations
-OPT?='O1 O2 O3 O4 O6 O7' # O5 disabled by default, because it breaks code
-
-ifneq ($(findstring release-memopt,$(MAKECMDGOALS)),)
-ifneq ($(filter O1,$(OPT)),)
-CXXFLAGS+=-fno-exceptions # Uncomment to disable exception handling
-DEFS+=-DNO_EXCEPTIONS # The source code has to comply with this rule
-endif
-
-ifneq ($(filter O2,$(OPT)),)
-CFLAGS+=-Os # Optimize for size https://gcc.gnu.org/onlinedocs/gcc/Optimize-Options.html
-CXXFLAGS+=-Os
-LDFLAGS+=-Os # Optimize for size https://gcc.gnu.org/onlinedocs/gcc/Optimize-Options.html
-endif
-
-ifneq ($(filter O3,$(OPT)),)
-CFLAGS+=-ffunction-sections -fdata-sections # Place each function or data item into its own section in the output file
-CXXFLAGS+=-ffunction-sections -fdata-sections # -||-
-LDFLAGS+=-Wl,-gc-sections # Remove isolated unused sections
-endif
-
-ifneq ($(filter O4,$(OPT)),)
-CFLAGS+=-fno-builtin # Disable C++ exception handling
-CXXFLAGS+=-fno-builtin # Disable C++ exception handling
-endif
-
-ifneq ($(filter O5,$(OPT)),)
-CFLAGS+=-flto # Enable link time optimization
-CXXFLAGS+=-flto # Enable link time optimization
-LDFLAGS+=-flto # Enable link time optimization
-endif
-
-ifneq ($(filter O6,$(OPT)),)
-CXXFLAGS+=-fno-rtti # Disable type introspection
-endif
-
-ifneq ($(findstring O7,$(OPT)),)
-LDFLAGS+=--specs=nano.specs # Use size optimized newlib
-endif
-endif
-
-###
-# Build Rules
-.PHONY: all release release-memopt debug clean
-
-all: release
-
-release: $(BINDIR)/$(BINHEX)
-
-release-memopt: release
-
-debug: CFLAGS+=-g
-debug: LDFLAGS+=-g
-debug: release
-
-$(BINDIR)/$(BINHEX): $(BINDIR)/$(BINELF)
-	$(CP) -O ihex $< $@
-
-$(BINDIR)/$(BINELF): $(OBJECTS)
-	$(CC) $(LDFLAGS) $(OBJECTS) -o $@
-	$(SIZE) $(BINDIR)/$(BINELF)
-
-%.o: %.c
-	$(CC) $(CFLAGS) $< -o $@
-
-%.o: %.s
-	$(CC) $(CFLAGS) $< -o $@
-
-clean:
-	rm -f $(OBJECTS) $(BINDIR)/$(BINELF) $(BINDIR)/$(BINHEX)
-
-# Connect to openocd's gdb server on port 3333
-deploy: $(BINDIR)/$(BINELF)
-ifeq ($(wildcard /opt/openocd/bin/openocd),)
-	/usr/bin/openocd -f /usr/share/openocd/scripts/board/stm32f4discovery.cfg -c "program bin/"$(BINELF)" verify reset" -c "init" -c "reset" -c "exit"
-else
-	/opt/openocd/bin/openocd -f /opt/openocd/share/openocd/scripts/board/stm32f4discovery.cfg -c "program bin/"$(BINELF)" verify reset" -c "init" -c "reset" -c "exit"
-endif
diff --git a/src/cw-example/README.md b/src/cw-example/README.md
deleted file mode 100644
index 5a75a32..0000000
--- a/src/cw-example/README.md
+++ /dev/null
@@ -1,2 +0,0 @@
-An example program that tries to output CW using
-the audio codec on the STM32F4DISCOVERY.
diff --git a/src/cw-example/audio.c b/src/cw-example/audio.c
deleted file mode 100644
index 752ad12..0000000
--- a/src/cw-example/audio.c
+++ /dev/null
@@ -1,285 +0,0 @@
-#include "audio.h"
-#include "stm32f4xx_conf.h"
-#include "stm32f4xx.h"
-
-#include <stdlib.h>
-
-static void WriteRegister(uint8_t address, uint8_t value);
-static void StartAudioDMAAndRequestBuffers();
-static void StopAudioDMA();
-
-static AudioCallbackFunction *CallbackFunction;
-static void *CallbackContext;
-static int16_t * volatile NextBufferSamples;
-static volatile int NextBufferLength;
-static volatile int BufferNumber;
-static volatile bool DMARunning;
-
-void InitializeAudio(int plln, int pllr, int i2sdiv, int i2sodd) {
-    GPIO_InitTypeDef  GPIO_InitStructure;
-
-    // Intitialize state.
-    CallbackFunction = NULL;
-    CallbackContext = NULL;
-    NextBufferSamples = NULL;
-    NextBufferLength = 0;
-    BufferNumber = 0;
-    DMARunning = false;
-
-    // Turn on peripherals.
-    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);
-    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB, ENABLE);
-    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC, ENABLE);
-    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOD, ENABLE);
-    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA1, ENABLE);
-
-    RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C1, ENABLE);
-    RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI3, ENABLE);
-
-    // Configure reset pin.
-    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4;;
-    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
-    GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
-    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
-    GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
-    GPIO_Init(GPIOD, &GPIO_InitStructure);
-
-    // Configure I2C SCL and SDA pins.
-    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_9;
-    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
-    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
-    GPIO_InitStructure.GPIO_OType = GPIO_OType_OD;
-    GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
-    GPIO_Init(GPIOB, &GPIO_InitStructure);
-
-    GPIO_PinAFConfig(GPIOB, GPIO_PinSource6, GPIO_AF_I2C1);
-    GPIO_PinAFConfig(GPIOB, GPIO_PinSource9, GPIO_AF_I2C1);
-
-    // Configure I2S MCK, SCK, SD pins.
-    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7 | GPIO_Pin_10 | GPIO_Pin_12;
-    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
-    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
-    GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
-    GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
-    GPIO_Init(GPIOC, &GPIO_InitStructure);
-
-    GPIO_PinAFConfig(GPIOC, GPIO_PinSource7, GPIO_AF_SPI3);
-    GPIO_PinAFConfig(GPIOC, GPIO_PinSource10, GPIO_AF_SPI3);
-    GPIO_PinAFConfig(GPIOC, GPIO_PinSource12, GPIO_AF_SPI3);
-
-    // Configure I2S WS pin.
-    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4;
-    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
-    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
-    GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
-    GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
-    GPIO_Init(GPIOA, &GPIO_InitStructure);
-
-    GPIO_PinAFConfig(GPIOA, GPIO_PinSource4, GPIO_AF_SPI3);
-
-    // Reset the codec.
-    GPIOD ->BSRRH = 1 << 4;
-    for (volatile int i = 0; i < 0x4fff; i++) {
-        __asm__ volatile("nop");
-    }
-    GPIOD ->BSRRL = 1 << 4;
-
-    // Reset I2C.
-    RCC_APB1PeriphResetCmd(RCC_APB1Periph_I2C1, ENABLE);
-    RCC_APB1PeriphResetCmd(RCC_APB1Periph_I2C1, DISABLE);
-
-    // Configure I2C.
-    uint32_t pclk1 = 42000000;
-
-    I2C1 ->CR2 = pclk1 / 1000000; // Configure frequency and disable interrupts and DMA.
-    I2C1 ->OAR1 = I2C_OAR1_ADDMODE | 0x33;
-
-    // Configure I2C speed in standard mode.
-    const uint32_t i2c_speed = 100000;
-    int ccrspeed = pclk1 / (i2c_speed * 2);
-    if (ccrspeed < 4) {
-        ccrspeed = 4;
-    }
-    I2C1 ->CCR = ccrspeed;
-    I2C1 ->TRISE = pclk1 / 1000000 + 1;
-
-    I2C1 ->CR1 = I2C_CR1_ACK | I2C_CR1_PE; // Enable and configure the I2C peripheral.
-
-    // Configure codec.
-    WriteRegister(0x02, 0x01); // Keep codec powered off.
-    WriteRegister(0x04, 0xaf); // SPK always off and HP always on.
-
-    WriteRegister(0x05, 0x81); // Clock configuration: Auto detection.
-    WriteRegister(0x06, 0x04); // Set slave mode and Philips audio standard.
-
-    SetAudioVolume(0xff);
-
-    // Power on the codec.
-    WriteRegister(0x02, 0x9e);
-
-    // Configure codec for fast shutdown.
-    WriteRegister(0x0a, 0x00); // Disable the analog soft ramp.
-    WriteRegister(0x0e, 0x04); // Disable the digital soft ramp.
-
-    WriteRegister(0x27, 0x00); // Disable the limiter attack level.
-    WriteRegister(0x1f, 0x0f); // Adjust bass and treble levels.
-
-    WriteRegister(0x1a, 0x0a); // Adjust PCM volume level.
-    WriteRegister(0x1b, 0x0a);
-
-    // Disable I2S.
-    SPI3 ->I2SCFGR = 0;
-
-    // I2S clock configuration
-    RCC ->CFGR &= ~RCC_CFGR_I2SSRC; // PLLI2S clock used as I2S clock source.
-    RCC ->PLLI2SCFGR = (pllr << 28) | (plln << 6);
-
-    // Enable PLLI2S and wait until it is ready.
-    RCC ->CR |= RCC_CR_PLLI2SON;
-    while (!(RCC ->CR & RCC_CR_PLLI2SRDY ))
-        ;
-
-    // Configure I2S.
-    SPI3 ->I2SPR = i2sdiv | (i2sodd << 8) | SPI_I2SPR_MCKOE;
-    SPI3 ->I2SCFGR = SPI_I2SCFGR_I2SMOD | SPI_I2SCFGR_I2SCFG_1
-        | SPI_I2SCFGR_I2SE; // Master transmitter, Phillips mode, 16 bit values, clock polarity low, enable.
-
-}
-
-void AudioOn() {
-    WriteRegister(0x02, 0x9e);
-    SPI3 ->I2SCFGR = SPI_I2SCFGR_I2SMOD | SPI_I2SCFGR_I2SCFG_1
-        | SPI_I2SCFGR_I2SE; // Master transmitter, Phillips mode, 16 bit values, clock polarity low, enable.
-}
-
-void AudioOff() {
-    WriteRegister(0x02, 0x01);
-    SPI3 ->I2SCFGR = 0;
-}
-
-void SetAudioVolume(int volume) {
-    WriteRegister(0x20, (volume + 0x19) & 0xff);
-    WriteRegister(0x21, (volume + 0x19) & 0xff);
-}
-
-void OutputAudioSample(int16_t sample) {
-    while (!(SPI3 ->SR & SPI_SR_TXE ))
-        ;
-    SPI3 ->DR = sample;
-}
-
-void OutputAudioSampleWithoutBlocking(int16_t sample) {
-    SPI3 ->DR = sample;
-}
-
-void PlayAudioWithCallback(AudioCallbackFunction *callback, void *context) {
-    StopAudioDMA();
-
-    NVIC_EnableIRQ(DMA1_Stream7_IRQn);
-    NVIC_SetPriority(DMA1_Stream7_IRQn, 5);
-
-    SPI3 ->CR2 |= SPI_CR2_TXDMAEN; // Enable I2S TX DMA request.
-
-    CallbackFunction = callback;
-    CallbackContext = context;
-    BufferNumber = 0;
-
-    if (CallbackFunction)
-        CallbackFunction(CallbackContext, BufferNumber);
-}
-
-void StopAudio() {
-    StopAudioDMA();
-    SPI3 ->CR2 &= ~SPI_CR2_TXDMAEN; // Disable I2S TX DMA request.
-    NVIC_DisableIRQ(DMA1_Stream7_IRQn);
-    CallbackFunction = NULL;
-}
-
-void ProvideAudioBuffer(void *samples, int numsamples) {
-    while (!ProvideAudioBufferWithoutBlocking(samples, numsamples))
-        __asm__ volatile ("wfi");
-}
-
-bool ProvideAudioBufferWithoutBlocking(void *samples, int numsamples) {
-    if (NextBufferSamples)
-        return false;
-
-    NVIC_DisableIRQ(DMA1_Stream7_IRQn);
-
-    NextBufferSamples = samples;
-    NextBufferLength = numsamples;
-
-    if (!DMARunning)
-        StartAudioDMAAndRequestBuffers();
-
-    NVIC_EnableIRQ(DMA1_Stream7_IRQn);
-
-    return true;
-}
-
-static void WriteRegister(uint8_t address, uint8_t value) {
-    while (I2C1 ->SR2 & I2C_SR2_BUSY )
-        ;
-
-    I2C1 ->CR1 |= I2C_CR1_START; // Start the transfer sequence.
-    while (!(I2C1 ->SR1 & I2C_SR1_SB ))
-        ; // Wait for start bit.
-
-    I2C1 ->DR = 0x94;
-    while (!(I2C1 ->SR1 & I2C_SR1_ADDR ))
-        ; // Wait for master transmitter mode.
-    I2C1 ->SR2;
-
-    I2C1 ->DR = address; // Transmit the address to write to.
-    while (!(I2C1 ->SR1 & I2C_SR1_TXE ))
-        ; // Wait for byte to move to shift register.
-
-    I2C1 ->DR = value; // Transmit the value.
-
-    while (!(I2C1 ->SR1 & I2C_SR1_BTF ))
-        ; // Wait for all bytes to finish.
-    I2C1 ->CR1 |= I2C_CR1_STOP; // End the transfer sequence.
-}
-
-static void StartAudioDMAAndRequestBuffers() {
-    // Configure DMA stream.
-    DMA1_Stream7 ->CR = (0 * DMA_SxCR_CHSEL_0 ) | // Channel 0
-        (1 * DMA_SxCR_PL_0 ) | // Priority 1
-        (1 * DMA_SxCR_PSIZE_0 ) | // PSIZE = 16 bit
-        (1 * DMA_SxCR_MSIZE_0 ) | // MSIZE = 16 bit
-        DMA_SxCR_MINC | // Increase memory address
-        (1 * DMA_SxCR_DIR_0 ) | // Memory to peripheral
-        DMA_SxCR_TCIE; // Transfer complete interrupt
-    DMA1_Stream7 ->NDTR = NextBufferLength;
-    DMA1_Stream7 ->PAR = (uint32_t) &SPI3 ->DR;
-    DMA1_Stream7 ->M0AR = (uint32_t) NextBufferSamples;
-    DMA1_Stream7 ->FCR = DMA_SxFCR_DMDIS;
-    DMA1_Stream7 ->CR |= DMA_SxCR_EN;
-
-    // Update state.
-    NextBufferSamples = NULL;
-    BufferNumber ^= 1;
-    DMARunning = true;
-
-    // Invoke callback if it exists to queue up another buffer.
-    if (CallbackFunction)
-        CallbackFunction(CallbackContext, BufferNumber);
-}
-
-static void StopAudioDMA() {
-    DMA1_Stream7 ->CR &= ~DMA_SxCR_EN; // Disable DMA stream.
-    while (DMA1_Stream7 ->CR & DMA_SxCR_EN )
-        ; // Wait for DMA stream to stop.
-
-    DMARunning = false;
-}
-
-void DMA1_Stream7_IRQHandler() {
-    DMA1 ->HIFCR |= DMA_HIFCR_CTCIF7; // Clear interrupt flag.
-
-    if (NextBufferSamples) {
-        StartAudioDMAAndRequestBuffers();
-    } else {
-        DMARunning = false;
-    }
-}
diff --git a/src/cw-example/audio.h b/src/cw-example/audio.h
deleted file mode 100644
index 35f3f65..0000000
--- a/src/cw-example/audio.h
+++ /dev/null
@@ -1,50 +0,0 @@
-#ifndef __AUDIO_H__
-#define __AUDIO_H__
-
-#include <stdint.h>
-#include <stdbool.h>
-
-typedef void AudioCallbackFunction(void *context,int buffer);
-
-#define Audio8000HzSettings 256,5,12,1
-#define Audio16000HzSettings 213,2,13,0
-#define Audio32000HzSettings 213,2,6,1
-#define Audio48000HzSettings 258,3,3,1
-#define Audio96000HzSettings 344,2,3,1
-#define Audio22050HzSettings 429,4,9,1
-#define Audio44100HzSettings 271,2,6,0
-#define AudioVGAHSyncSettings 419,2,13,0 // 31475.3606. Actual VGA timer is 31472.4616.
-
-#define AUDIO_BUF_LEN 4096
-
-
-// Initialize and power up audio hardware. Use the above defines for the parameters.
-// Can probably only be called once.
-void InitializeAudio(int plln,int pllr,int i2sdiv,int i2sodd);
-
-// Power up and down the audio hardware.
-void AudioOn();
-void AudioOff();
-
-// Set audio volume in steps of 0.5 dB. 0xff is +12 dB.
-void SetAudioVolume(int volume);
-
-// Output one audio sample directly to the hardware without using DMA.
-void OutputAudioSample(int16_t sample);
-void OutputAudioSampleWithoutBlocking(int16_t sample);
-
-// Start and stop audio playback using DMA.
-// Callback is optional, and called whenever a new buffer is needed.
-void PlayAudioWithCallback(AudioCallbackFunction *callback,void *context);
-void StopAudio();
-
-// Provide a new buffer to the audio DMA. Output is double buffered, so
-// at least two buffers must be maintained by the program. It is not allowed
-// to overwrite the previously provided buffer until after the next callback
-// invocation.
-// Buffers must reside in DMA1-accessible memory, that is, the 128k RAM bank,
-// or flash.
-void ProvideAudioBuffer(void *samples,int numsamples);
-bool ProvideAudioBufferWithoutBlocking(void *samples,int numsamples);
-
-#endif
diff --git a/src/cw-example/bin/.git_keep b/src/cw-example/bin/.git_keep
deleted file mode 100644
index e69de29..0000000
--- a/src/cw-example/bin/.git_keep
+++ /dev/null
diff --git a/src/cw-example/bsp b/src/cw-example/bsp
deleted file mode 120000
index 5d9120a..0000000
--- a/src/cw-example/bsp
+++ /dev/null
@@ -1 +0,0 @@
-../bsp
\ No newline at end of file
diff --git a/src/cw-example/cw.c b/src/cw-example/cw.c
deleted file mode 100644
index a54a3ea..0000000
--- a/src/cw-example/cw.c
+++ /dev/null
@@ -1,294 +0,0 @@
-/*
- * The MIT License (MIT)
- *
- * Copyright (c) 2015 Matthias P. Braendli
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in all
- * copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
-*/
-
-/* CW generator
- *
- * Concept:
- *
- * +-------------------+                    +-----------+
- * | cw_push_message() | -> cw_msg_queue -> | cw_task() | -> cw_audio_queue
- * +-------------------+                    +-----------+
- *
- * The cw_fill_buffer() function can be called to fetch audio from the audio_queue
- */
-
-#include "cw.h"
-#include "arm_math.h"
-#include "audio.h"
-#include "debug.h"
-
-/* Kernel includes. */
-#include "FreeRTOS.h"
-#include "task.h"
-#include "queue.h"
-#include "semphr.h"
-
-#define ON_BUFFER_SIZE 1024
-
-struct cw_out_message_s {
-    // Contains a sequence of ones and zeros corresponding to
-    // TX on/TX off CW data to be sent
-    uint8_t on_buffer[ON_BUFFER_SIZE];
-    size_t  on_buffer_end;
-
-    int     freq;
-    int     dit_duration;
-};
-
-// The queue contains above structs
-QueueHandle_t cw_msg_queue;
-
-// Queue that contains audio data
-QueueHandle_t cw_audio_queue;
-static int    cw_samplerate;
-
-static void cw_task(void *pvParameters);
-
-void cw_init(unsigned int samplerate)
-{
-    cw_samplerate = samplerate;
-
-    cw_msg_queue = xQueueCreate(15, sizeof(struct cw_out_message_s));
-    if (cw_msg_queue == 0) {
-        while(1); /* fatal error */
-    }
-
-    cw_audio_queue = xQueueCreate(2, AUDIO_BUF_LEN * sizeof(int16_t));
-    if (cw_audio_queue == 0) {
-        while(1); /* fatal error */
-    }
-
-    xTaskCreate(
-            cw_task,
-            "TaskCW",
-            8*configMINIMAL_STACK_SIZE,
-            (void*) NULL,
-            tskIDLE_PRIORITY + 2UL,
-            NULL);
-}
-
-const uint8_t cw_mapping[60] = { // {{{
-    // Read bits from right to left
-
-    0b110101, //+ ASCII 43
-    0b110101, //, ASCII 44
-    0b1011110, //- ASCII 45
-
-    0b1010101, //., ASCII 46
-    0b110110, // / ASCII 47
-
-    0b100000, // 0, ASCII 48
-    0b100001, // 1
-    0b100011,
-    0b100111,
-    0b101111,
-    0b111111,
-    0b111110,
-    0b111100,
-    0b111000,
-    0b110000, // 9, ASCII 57
-
-    // The following are mostly invalid, but
-    // required to fill the gap in ASCII between
-    // numerals and capital letters
-    0b10, // :
-    0b10, // ;
-    0b10, // <
-    0b10, // =
-    0b10, // >
-    0b1110011, // ?
-    0b1101001, //@
-
-    0b101, // A  ASCII 65
-    0b11110,
-    0b11010,
-    0b1110,
-    0b11,
-    0b11011,
-    0b1100,
-    0b11111,
-    0b111,
-    0b10001,
-    0b1010,
-    0b11101,
-    0b100, //M
-    0b110,
-    0b1000,
-    0b11001,
-    0b10100,
-    0b1101,
-    0b1111,
-    0b10,
-    0b1011,
-    0b10111,
-    0b1001,
-    0b10110,
-    0b10010,
-    0b11100, // Z
-
-    0b101010, //Start, ASCII [
-    0b1010111, // SK , ASCII '\'
-}; //}}}
-
-void cw_symbol(uint8_t sym, struct cw_out_message_s *msg)
-{
-    uint8_t p = 0;
-    uint8_t val = cw_mapping[sym];
-
-    while((val >> p) != 0b1) {
-
-        if (((val >> p) & 0b1) == 0b1) {
-            if (msg->on_buffer_end + 2 < ON_BUFFER_SIZE) {
-                // tone(1)
-                msg->on_buffer[msg->on_buffer_end++] = 1;
-
-                // silence(1)
-                msg->on_buffer[msg->on_buffer_end++] = 0;
-            }
-        }
-        else {
-            if (msg->on_buffer_end + 4 < ON_BUFFER_SIZE) {
-                // tone(3)
-                msg->on_buffer[msg->on_buffer_end++] = 1;
-                msg->on_buffer[msg->on_buffer_end++] = 1;
-                msg->on_buffer[msg->on_buffer_end++] = 1;
-
-                // silence(1)
-                msg->on_buffer[msg->on_buffer_end++] = 0;
-            }
-        }
-
-        p++;
-    }
-
-    // silence(2)
-    if (msg->on_buffer_end + 2 < ON_BUFFER_SIZE) {
-        for (int i = 0; i < 2; i++) {
-            msg->on_buffer[msg->on_buffer_end++] = 0;
-        }
-    }
-}
-
-// Transmit a string in morse code. Supported range:
-// All ASCII between '+' and '\', which includes
-// numerals and capital letters.
-void cw_push_message(const char* text, int dit_duration, int frequency)
-{
-    struct cw_out_message_s msg;
-    for (int i = 0; i < ON_BUFFER_SIZE; i++) {
-        msg.on_buffer[i] = 0;
-    }
-    msg.on_buffer_end = 0;
-    msg.freq = frequency;
-    msg.dit_duration = dit_duration;
-
-    const char* sym = text;
-    do {
-        if (*sym < '+' || *sym > '\\') {
-            if (msg.on_buffer_end + 3 < ON_BUFFER_SIZE) {
-                for (int i = 0; i < 3; i++) {
-                    msg.on_buffer[msg.on_buffer_end++] = 0;
-                }
-            }
-        }
-        else {
-            cw_symbol(*sym - '+', &msg);
-        }
-        sym++;
-    } while (*sym != '\0');
-
-    xQueueSendToBack(cw_msg_queue, &msg, portMAX_DELAY); /* Send Message */
-}
-
-size_t cw_fill_buffer(int16_t *buf, size_t bufsize)
-{
-    if (xQueueReceiveFromISR(cw_audio_queue, buf, NULL)) {
-        return bufsize;
-    }
-    else {
-        return 0;
-    }
-}
-
-static int16_t cw_audio_buf[AUDIO_BUF_LEN];
-static void cw_task(void *pvParameters)
-{
-    struct cw_out_message_s cw_fill_msg_current;
-
-    float nco_phase = 0.0f;
-    float ampl = 0.0f;
-
-    int     buf_pos = 0;
-
-    while (1) {
-        int status = xQueueReceive(cw_msg_queue, &cw_fill_msg_current, portMAX_DELAY);
-        if (status == pdTRUE) {
-
-            const int samples_per_dit = (cw_samplerate * 10) /
-                cw_fill_msg_current.dit_duration;
-
-            // Angular frequency of NCO
-            const float omega = 2.0f * FLOAT_PI * cw_fill_msg_current.freq /
-                (float)cw_samplerate;
-
-            for (int i = 0; i < cw_fill_msg_current.on_buffer_end; i++) {
-                for (int t = 0; t < samples_per_dit; t++) {
-                    int16_t s = 0;
-
-                    // Remove clicks from CW
-                    if (cw_fill_msg_current.on_buffer[i]) {
-                        const float remaining = 32768.0f - ampl;
-                        ampl += remaining / 64.0f;
-                    }
-                    else {
-                        ampl -= ampl / 64.0f;
-                    }
-
-                    nco_phase += omega;
-                    if (nco_phase > FLOAT_PI) {
-                        nco_phase -= 2.0f * FLOAT_PI;
-                    }
-
-                    s = ampl * arm_sin_f32(nco_phase);
-
-                    if (buf_pos == AUDIO_BUF_LEN) {
-                        xQueueSendToBack(cw_audio_queue, &cw_audio_buf, portMAX_DELAY);
-                        buf_pos = 0;
-                    }
-                    cw_audio_buf[buf_pos++] = s;
-
-                    // Stereo
-                    if (buf_pos == AUDIO_BUF_LEN) {
-                        xQueueSendToBack(cw_audio_queue, &cw_audio_buf, portMAX_DELAY);
-                        buf_pos = 0;
-                    }
-                    cw_audio_buf[buf_pos++] = s;
-                }
-            }
-
-            // We have completed this message
-        }
-    }
-}
-
diff --git a/src/cw-example/cw.h b/src/cw-example/cw.h
deleted file mode 100644
index b090a04..0000000
--- a/src/cw-example/cw.h
+++ /dev/null
@@ -1,41 +0,0 @@
-/*
- * The MIT License (MIT)
- *
- * Copyright (c) 2015 Matthias P. Braendli
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in all
- * copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
-*/
-
-#include <stdint.h>
-#include <stddef.h>
-
-#define FLOAT_PI 3.1415926535897932384f
-
-// Setup the CW generator to create audio samples at the given
-// samplerate.
-void cw_init(unsigned int samplerate);
-
-// Append new CW text to transmit
-// dit_duration in ms
-// frequency in Hz
-void cw_push_message(const char* text, int dit_duration, int frequency);
-
-// Write the waveform into the buffer (stereo)
-size_t cw_fill_buffer(int16_t *buf, size_t bufsize);
-
diff --git a/src/cw-example/debug.c b/src/cw-example/debug.c
deleted file mode 100644
index 2e33a32..0000000
--- a/src/cw-example/debug.c
+++ /dev/null
@@ -1,77 +0,0 @@
-/*
- * The MIT License (MIT)
- *
- * Copyright (c) 2015 Matthias P. Braendli
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in all
- * copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
-*/
-
-#include <stddef.h>
-#include <stdint.h>
-
-#include "debug.h"
-
-#if _DEBUG
-
-void debug_send_command(int command, void *message)
-{
-    __asm__ volatile (
-        "mov r0, %[cmd];"
-            "mov r1, %[msg];"
-            "bkpt #0xAB"
-            :
-            : [cmd] "r" (command), [msg] "r" (message)
-            : "r0", "r1", "memory");
-}
-
-void put_char(char c)
-{
-    __asm__ volatile (
-            "mov r0, #0x03\n"   /* SYS_WRITEC */
-            "mov r1, %[msg]\n"
-            "bkpt #0xAB\n"
-            :
-            : [msg] "r" (&c)
-            : "r0", "r1"
-        );
-}
-
-void debug_print(const char* str)
-{
-    const int std_err = 2;
-
-    int strlen = 0;
-    const char* s;
-    s = str;
-    while (*s) {
-        strlen++;
-        s++;
-    }
-
-    uint32_t m[] = { std_err, (uint32_t)str, strlen };
-    debug_send_command(0x05, m);
-}
-
-#else
-void debug_send_command(int command, void *message) { }
-void put_char(char c) { }
-void debug_print(const char* str) { }
-
-#endif
-
diff --git a/src/cw-example/debug.h b/src/cw-example/debug.h
deleted file mode 100644
index 6215e5f..0000000
--- a/src/cw-example/debug.h
+++ /dev/null
@@ -1,47 +0,0 @@
-/*
- * The MIT License (MIT)
- *
- * Copyright (c) 2015 Matthias P. Braendli
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in all
- * copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
-*/
-
-/* Debugging utilities using the ARM semihosting facilities. Warning, it's quite
- * slow.
- *
- * when used with OpenOCD's gdb server, requires the gdb command
- *
- * monitor arm semihosting enable
- */
-#ifndef __DEBUG_H_
-#define __DEBUG_H_
-
-/* Example usage for the send_command function
-const char *s = "Hello world\n";
-uint32_t m[] = { 2, (uint32_t)s, sizeof(s)/sizeof(char) };
-send_command(0x05, m);
-// some interrupt ID
-
-*/
-
-/* Print a string to the OpenOCD console */
-void debug_print(const char* str);
-
-#endif // __DEBUG_H_
-
diff --git a/src/cw-example/main.c b/src/cw-example/main.c
deleted file mode 100644
index ba0e9c0..0000000
--- a/src/cw-example/main.c
+++ /dev/null
@@ -1,215 +0,0 @@
-#include <stdio.h>
-#include <stdlib.h>
-#include <stdint.h>
-#include <math.h>
-#include "stm32f4xx_conf.h"
-#include "audio.h"
-
-/* Kernel includes. */
-#include "FreeRTOS.h"
-#include "task.h"
-#include "timers.h"
-#include "semphr.h"
-
-#include "cw.h"
-
-// Private variables
-volatile uint32_t time_var1, time_var2;
-
-// Private function prototypes
-void init();
-
-// Tasks
-static void detect_button_press(void *pvParameters);
-static void audio_task(void *pvParameters);
-
-struct cw_msg_s {
-    const char* msg;
-    int freq;
-    int dit_duration;
-};
-
-void vApplicationStackOverflowHook( TaskHandle_t xTask,
-                                    signed char *pcTaskName )
-{
-    while (1) {};
-}
-
-int main(void) {
-    init();
-
-    cw_init(16000);
-
-    InitializeAudio(Audio16000HzSettings);
-    SetAudioVolume(128);
-
-    xTaskCreate(
-            detect_button_press,
-            "TaskButton",
-            4*configMINIMAL_STACK_SIZE,
-            (void*) NULL,
-            tskIDLE_PRIORITY + 2UL,
-            NULL);
-
-    xTaskCreate(
-            audio_task,
-            "TaskAudio",
-            configMINIMAL_STACK_SIZE,
-            (void*) NULL,
-            tskIDLE_PRIORITY + 2UL,
-            NULL);
-
-    /* Start the RTOS Scheduler */
-    vTaskStartScheduler();
-
-    /* HALT */
-    while(1);
-}
-
-
-static void detect_button_press(void *pvParameters)
-{
-    int message_select = 0;
-    struct cw_msg_s msg1 = { "HB9G 1628M",     400, 100 };
-    struct cw_msg_s msg2 = { "HB9G JN36BK",    500, 100 };
-    struct cw_msg_s msg3 = { "HB9G U 12.5 73", 400, 130 };
-
-    GPIO_SetBits(GPIOD, GPIO_Pin_12);
-
-    while (1) {
-        if (GPIO_ReadInputDataBit(GPIOA,GPIO_Pin_0)>0) {
-
-            while (GPIO_ReadInputDataBit(GPIOA,GPIO_Pin_0) > 0) {
-                vTaskDelay(100 / portTICK_RATE_MS); /* Button Debounce Delay */
-            }
-
-            if (message_select == 0) {
-                GPIO_ResetBits(GPIOD, GPIO_Pin_12);
-                GPIO_SetBits(GPIOD, GPIO_Pin_15);
-                cw_push_message(msg1.msg, msg1.dit_duration, msg1.freq);
-                message_select++;
-            }
-            else if (message_select == 1) {
-                GPIO_SetBits(GPIOD, GPIO_Pin_12);
-                cw_push_message(msg2.msg, msg2.dit_duration, msg2.freq);
-                message_select++;
-            }
-            else if (message_select == 2) {
-                GPIO_ResetBits(GPIOD, GPIO_Pin_15);
-                cw_push_message(msg3.msg, msg3.dit_duration, msg3.freq);
-                message_select = 0;
-            }
-
-            while (GPIO_ReadInputDataBit(GPIOA,GPIO_Pin_0) == 0) {
-                vTaskDelay(100 / portTICK_RATE_MS); /* Button Debounce Delay */
-            }
-        }
-        taskYIELD();
-    }
-}
-
-static void audio_callback(void* context, int select_buffer)
-{
-    static int16_t audio_buffer0[AUDIO_BUF_LEN];
-    static int16_t audio_buffer1[AUDIO_BUF_LEN];
-    int16_t *samples;
-
-    if (select_buffer == 0) {
-        samples = audio_buffer0;
-        GPIO_SetBits(GPIOD, GPIO_Pin_13);
-        GPIO_ResetBits(GPIOD, GPIO_Pin_14);
-        select_buffer = 1;
-    } else {
-        samples = audio_buffer1;
-        GPIO_SetBits(GPIOD, GPIO_Pin_14);
-        GPIO_ResetBits(GPIOD, GPIO_Pin_13);
-        select_buffer = 0;
-    }
-
-    size_t samples_len = cw_fill_buffer(samples, AUDIO_BUF_LEN);
-
-    if (samples_len == 0) {
-        for (int i = 0; i < AUDIO_BUF_LEN; i++) {
-            samples[i] = 0;
-        }
-
-        samples_len = AUDIO_BUF_LEN;
-    }
-
-    ProvideAudioBufferWithoutBlocking(samples, samples_len);
-}
-
-static void audio_task(void *pvParameters)
-{
-    int select_buffer = 0;
-
-    PlayAudioWithCallback(audio_callback, NULL);
-
-    while (1) {
-        taskYIELD();
-    }
-}
-
-
-void init() {
-    GPIO_InitTypeDef  GPIO_InitStructure;
-    USART_InitTypeDef USART_InitStructure;
-    // ---------- SysTick timer -------- //
-    if (SysTick_Config(SystemCoreClock / 1000)) {
-        // Capture error
-        while (1){};
-    }
-
-    // Enable full access to FPU (Should be done automatically in system_stm32f4xx.c):
-    //SCB->CPACR |= ((3UL << 10*2)|(3UL << 11*2));  // set CP10 and CP11 Full Access
-
-    // GPIOD Periph clock enable
-    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOD, ENABLE);
-
-    // Configure PD12, PD13, PD14 and PD15 in output pushpull mode
-    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12 | GPIO_Pin_13| GPIO_Pin_14| GPIO_Pin_15;
-    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
-    GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
-    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
-    GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
-    GPIO_Init(GPIOD, &GPIO_InitStructure);
-
-    // Init PushButton
-    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
-    GPIO_InitStructure.GPIO_Pin =  GPIO_Pin_0;
-    GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
-    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
-    GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
-    GPIO_Init(GPIOA, &GPIO_InitStructure);
-
-
-    // ------ UART ------ //
-
-    // Clock
-    RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);
-    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);
-
-    // IO
-    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5 | GPIO_Pin_6;
-    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
-    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
-    GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
-    GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
-    GPIO_Init(GPIOD, &GPIO_InitStructure);
-
-    GPIO_PinAFConfig(GPIOD, GPIO_PinSource5, GPIO_AF_USART1);
-    GPIO_PinAFConfig(GPIOD, GPIO_PinSource6, GPIO_AF_USART1);
-
-    // Conf
-    USART_InitStructure.USART_BaudRate = 115200;
-    USART_InitStructure.USART_WordLength = USART_WordLength_8b;
-    USART_InitStructure.USART_StopBits = USART_StopBits_1;
-    USART_InitStructure.USART_Parity = USART_Parity_No;
-    USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
-    USART_InitStructure.USART_Mode = USART_Mode_Tx | USART_Mode_Rx;
-    USART_Init(USART2, &USART_InitStructure);
-
-    // Enable
-    USART_Cmd(USART2, ENABLE);
-}
-