diff --git a/Makefile b/Makefile
index f35692a..95a3b7b 100644
--- a/Makefile
+++ b/Makefile
@@ -6,6 +6,7 @@
 # Compiler options here.
 ifeq ($(USE_OPT),)
   USE_OPT = -Og -ggdb -fomit-frame-pointer -falign-functions=16 -mtune=cortex-m4
+#  USE_OPT = -Os -fomit-frame-pointer -falign-functions=16 -mtune=cortex-m4
 endif
 
 # C specific options here (added to USE_OPT).
@@ -55,7 +56,7 @@ endif
 # Stack size to be allocated to the Cortex-M process stack. This stack is
 # the stack used by the main() thread.
 ifeq ($(USE_PROCESS_STACKSIZE),)
-  USE_PROCESS_STACKSIZE = 4096
+  USE_PROCESS_STACKSIZE = 2048
 endif
 
 # Stack size to the allocated to the Cortex-M main/exceptions stack. This
@@ -100,10 +101,10 @@ include $(CHIBIOS)/os/license/license.mk
 include $(CHIBIOS)/os/common/startup/ARMCMx/compilers/GCC/mk/startup_stm32l4xx.mk
 # HAL-OSAL files (optional).
 include $(CHIBIOS)/os/hal/hal.mk
-#include $(CHIBIOS)/os/hal/ports/STM32/STM32L4xx/platform.mk
-#include $(CHIBIOS)/os/hal/boards/ST_STM32L476_DISCOVERY/board.mk
-include $(CHIBIOS)/os/hal/boards/ST_NUCLEO32_L432KC/board.mk
-include $(CHIBIOS)/os/hal/ports/STM32/STM32L4xx/platform_l432.mk
+include $(CHIBIOS)/os/hal/ports/STM32/STM32L4xx/platform.mk
+include $(CHIBIOS)/os/hal/boards/ST_STM32L476_DISCOVERY/board.mk
+#include $(CHIBIOS)/os/hal/boards/ST_NUCLEO32_L432KC/board.mk
+#include $(CHIBIOS)/os/hal/ports/STM32/STM32L4xx/platform_l432.mk
 include $(CHIBIOS)/os/hal/osal/rt-nil/osal.mk
 # RTOS files (optional).
 include $(CHIBIOS)/os/rt/rt.mk
@@ -117,7 +118,7 @@ include $(CHIBIOS)/tools/mk/autobuild.mk
 
 # Define linker script file here.
 #LDSCRIPT= $(STARTUPLD)/STM32L476xG.ld
-LDSCRIPT= $(STARTUPLD)/STM32L432xC.ld
+LDSCRIPT= STM32L432xC_stmdsp.ld
 
 # C sources that can be compiled in ARM or THUMB mode depending on the global
 # setting.
diff --git a/STM32L432xC_stmdsp.ld b/STM32L432xC_stmdsp.ld
new file mode 100644
index 0000000..0226659
--- /dev/null
+++ b/STM32L432xC_stmdsp.ld
@@ -0,0 +1,85 @@
+/*
+    ChibiOS - Copyright (C) 2006..2018 Giovanni Di Sirio
+
+    Licensed under the Apache License, Version 2.0 (the "License");
+    you may not use this file except in compliance with the License.
+    You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing, software
+    distributed under the License is distributed on an "AS IS" BASIS,
+    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+    See the License for the specific language governing permissions and
+    limitations under the License.
+*/
+
+/*
+ * STM32L432xC memory setup.
+ */
+MEMORY
+{
+    flash0 (rx) : org = 0x08000000, len = 256k
+    flash1 (rx) : org = 0x00000000, len = 0
+    flash2 (rx) : org = 0x00000000, len = 0
+    flash3 (rx) : org = 0x00000000, len = 0
+    flash4 (rx) : org = 0x00000000, len = 0
+    flash5 (rx) : org = 0x00000000, len = 0
+    flash6 (rx) : org = 0x00000000, len = 0
+    flash7 (rx) : org = 0x00000000, len = 0
+    ram0   (wx) : org = 0x20000000, len = 48k /* Save 16k of SRAM2 for loaded ELF */
+    ram1   (wx) : org = 0x00000000, len = 0
+    ram2   (wx) : org = 0x00000000, len = 0
+    ram3   (wx) : org = 0x00000000, len = 0
+    ram4   (wx) : org = 0x00000000, len = 0
+    ram5   (wx) : org = 0x00000000, len = 0
+    ram6   (wx) : org = 0x00000000, len = 0
+    ram7   (wx) : org = 0x00000000, len = 0
+}
+
+/* For each data/text section two region are defined, a virtual region
+   and a load region (_LMA suffix).*/
+
+/* Flash region to be used for exception vectors.*/
+REGION_ALIAS("VECTORS_FLASH", flash0);
+REGION_ALIAS("VECTORS_FLASH_LMA", flash0);
+
+/* Flash region to be used for constructors and destructors.*/
+REGION_ALIAS("XTORS_FLASH", flash0);
+REGION_ALIAS("XTORS_FLASH_LMA", flash0);
+
+/* Flash region to be used for code text.*/
+REGION_ALIAS("TEXT_FLASH", flash0);
+REGION_ALIAS("TEXT_FLASH_LMA", flash0);
+
+/* Flash region to be used for read only data.*/
+REGION_ALIAS("RODATA_FLASH", flash0);
+REGION_ALIAS("RODATA_FLASH_LMA", flash0);
+
+/* Flash region to be used for various.*/
+REGION_ALIAS("VARIOUS_FLASH", flash0);
+REGION_ALIAS("VARIOUS_FLASH_LMA", flash0);
+
+/* Flash region to be used for RAM(n) initialization data.*/
+REGION_ALIAS("RAM_INIT_FLASH_LMA", flash0);
+
+/* RAM region to be used for Main stack. This stack accommodates the processing
+   of all exceptions and interrupts.*/
+REGION_ALIAS("MAIN_STACK_RAM", ram0);
+
+/* RAM region to be used for the process stack. This is the stack used by
+   the main() function.*/
+REGION_ALIAS("PROCESS_STACK_RAM", ram0);
+
+/* RAM region to be used for data segment.*/
+REGION_ALIAS("DATA_RAM", ram0);
+REGION_ALIAS("DATA_RAM_LMA", flash0);
+
+/* RAM region to be used for BSS segment.*/
+REGION_ALIAS("BSS_RAM", ram0);
+
+/* RAM region to be used for the default heap.*/
+REGION_ALIAS("HEAP_RAM", ram0);
+
+/* Generic rules inclusion.*/
+INCLUDE rules.ld
diff --git a/cfg/chconf.h b/cfg/chconf.h
index 7e11588..04570c1 100644
--- a/cfg/chconf.h
+++ b/cfg/chconf.h
@@ -167,7 +167,7 @@
  * @note    The default is @p TRUE.
  */
 #if !defined(CH_CFG_USE_REGISTRY)
-#define CH_CFG_USE_REGISTRY                 TRUE
+#define CH_CFG_USE_REGISTRY                 FALSE
 #endif
 
 /**
@@ -178,7 +178,7 @@
  * @note    The default is @p TRUE.
  */
 #if !defined(CH_CFG_USE_WAITEXIT)
-#define CH_CFG_USE_WAITEXIT                 TRUE
+#define CH_CFG_USE_WAITEXIT                 FALSE
 #endif
 
 /**
@@ -235,7 +235,7 @@
  * @note    Requires @p CH_CFG_USE_MUTEXES.
  */
 #if !defined(CH_CFG_USE_CONDVARS)
-#define CH_CFG_USE_CONDVARS                 TRUE
+#define CH_CFG_USE_CONDVARS                 FALSE
 #endif
 
 /**
@@ -247,7 +247,7 @@
  * @note    Requires @p CH_CFG_USE_CONDVARS.
  */
 #if !defined(CH_CFG_USE_CONDVARS_TIMEOUT)
-#define CH_CFG_USE_CONDVARS_TIMEOUT         TRUE
+#define CH_CFG_USE_CONDVARS_TIMEOUT         FALSE
 #endif
 
 /**
@@ -269,7 +269,7 @@
  * @note    Requires @p CH_CFG_USE_EVENTS.
  */
 #if !defined(CH_CFG_USE_EVENTS_TIMEOUT)
-#define CH_CFG_USE_EVENTS_TIMEOUT           TRUE
+#define CH_CFG_USE_EVENTS_TIMEOUT           FALSE
 #endif
 
 /**
@@ -280,7 +280,7 @@
  * @note    The default is @p TRUE.
  */
 #if !defined(CH_CFG_USE_MESSAGES)
-#define CH_CFG_USE_MESSAGES                 TRUE
+#define CH_CFG_USE_MESSAGES                 FALSE
 #endif
 
 /**
@@ -306,7 +306,7 @@
  * @note    Requires @p CH_CFG_USE_HEAP and/or @p CH_CFG_USE_MEMPOOLS.
  */
 #if !defined(CH_CFG_USE_DYNAMIC)
-#define CH_CFG_USE_DYNAMIC                  TRUE
+#define CH_CFG_USE_DYNAMIC                  FALSE
 #endif
 
 /** @} */
@@ -353,7 +353,7 @@
  * @note    Requires @p CH_CFG_USE_MEMCORE.
  */
 #if !defined(CH_CFG_MEMCORE_SIZE)
-#define CH_CFG_MEMCORE_SIZE                 0
+#define CH_CFG_MEMCORE_SIZE                 (3 * 1024)
 #endif
 
 /**
@@ -389,7 +389,7 @@
  * @note    The default is @p TRUE.
  */
 #if !defined(CH_CFG_USE_OBJ_FIFOS)
-#define CH_CFG_USE_OBJ_FIFOS                TRUE
+#define CH_CFG_USE_OBJ_FIFOS                FALSE
 #endif
 
 /**
@@ -400,7 +400,7 @@
  * @note    The default is @p TRUE.
  */
 #if !defined(CH_CFG_USE_PIPES)
-#define CH_CFG_USE_PIPES                    TRUE
+#define CH_CFG_USE_PIPES                    FALSE
 #endif
 
 /**
@@ -411,7 +411,7 @@
  * @note    The default is @p TRUE.
  */
 #if !defined(CH_CFG_USE_OBJ_CACHES)
-#define CH_CFG_USE_OBJ_CACHES               TRUE
+#define CH_CFG_USE_OBJ_CACHES               FALSE
 #endif
 
 /**
@@ -422,7 +422,7 @@
  * @note    The default is @p TRUE.
  */
 #if !defined(CH_CFG_USE_DELEGATES)
-#define CH_CFG_USE_DELEGATES                TRUE
+#define CH_CFG_USE_DELEGATES                FALSE
 #endif
 
 /**
@@ -433,7 +433,7 @@
  * @note    The default is @p TRUE.
  */
 #if !defined(CH_CFG_USE_JOBS)
-#define CH_CFG_USE_JOBS                     TRUE
+#define CH_CFG_USE_JOBS                     FALSE
 #endif
 
 /** @} */
@@ -453,7 +453,7 @@
  * @note    The default is @p FALSE.
  */
 #if !defined(CH_CFG_USE_FACTORY)
-#define CH_CFG_USE_FACTORY                  TRUE
+#define CH_CFG_USE_FACTORY                  FALSE
 #endif
 
 /**
@@ -469,42 +469,42 @@
  * @brief   Enables the registry of generic objects.
  */
 #if !defined(CH_CFG_FACTORY_OBJECTS_REGISTRY)
-#define CH_CFG_FACTORY_OBJECTS_REGISTRY     TRUE
+#define CH_CFG_FACTORY_OBJECTS_REGISTRY     FALSE
 #endif
 
 /**
  * @brief   Enables factory for generic buffers.
  */
 #if !defined(CH_CFG_FACTORY_GENERIC_BUFFERS)
-#define CH_CFG_FACTORY_GENERIC_BUFFERS      TRUE
+#define CH_CFG_FACTORY_GENERIC_BUFFERS      FALSE
 #endif
 
 /**
  * @brief   Enables factory for semaphores.
  */
 #if !defined(CH_CFG_FACTORY_SEMAPHORES)
-#define CH_CFG_FACTORY_SEMAPHORES           TRUE
+#define CH_CFG_FACTORY_SEMAPHORES           FALSE
 #endif
 
 /**
  * @brief   Enables factory for mailboxes.
  */
 #if !defined(CH_CFG_FACTORY_MAILBOXES)
-#define CH_CFG_FACTORY_MAILBOXES            TRUE
+#define CH_CFG_FACTORY_MAILBOXES            FALSE
 #endif
 
 /**
  * @brief   Enables factory for objects FIFOs.
  */
 #if !defined(CH_CFG_FACTORY_OBJ_FIFOS)
-#define CH_CFG_FACTORY_OBJ_FIFOS            TRUE
+#define CH_CFG_FACTORY_OBJ_FIFOS            FALSE
 #endif
 
 /**
  * @brief   Enables factory for Pipes.
  */
 #if !defined(CH_CFG_FACTORY_PIPES) || defined(__DOXYGEN__)
-#define CH_CFG_FACTORY_PIPES                TRUE
+#define CH_CFG_FACTORY_PIPES                FALSE
 #endif
 
 /** @} */
@@ -556,7 +556,7 @@
  * @note    The default is @p FALSE.
  */
 #if !defined(CH_DBG_ENABLE_ASSERTS)
-#define CH_DBG_ENABLE_ASSERTS               TRUE
+#define CH_DBG_ENABLE_ASSERTS               FALSE
 #endif
 
 /**
@@ -752,7 +752,7 @@
 /*===========================================================================*/
 
 // Enable syscall support
-#define PORT_USE_SYSCALL                    TRUE
+#define PORT_USE_SYSCALL                    FALSE
 
 #endif  /* CHCONF_H */
 
diff --git a/cfg/halconf.h b/cfg/halconf.h
index bb6dd3a..24c6fde 100644
--- a/cfg/halconf.h
+++ b/cfg/halconf.h
@@ -142,7 +142,7 @@
  * @brief   Enables the SERIAL subsystem.
  */
 #if !defined(HAL_USE_SERIAL) || defined(__DOXYGEN__)
-#define HAL_USE_SERIAL                      TRUE
+#define HAL_USE_SERIAL                      FALSE
 #endif
 
 /**
@@ -230,7 +230,7 @@
  * @note    Disabling this option saves both code and data space.
  */
 #if !defined(ADC_USE_WAIT) || defined(__DOXYGEN__)
-#define ADC_USE_WAIT                        TRUE
+#define ADC_USE_WAIT                        FALSE
 #endif
 
 /**
@@ -238,7 +238,7 @@
  * @note    Disabling this option saves both code and data space.
  */
 #if !defined(ADC_USE_MUTUAL_EXCLUSION) || defined(__DOXYGEN__)
-#define ADC_USE_MUTUAL_EXCLUSION            TRUE
+#define ADC_USE_MUTUAL_EXCLUSION            FALSE
 #endif
 
 /*===========================================================================*/
@@ -290,7 +290,7 @@
  * @note    Disabling this option saves both code and data space.
  */
 #if !defined(DAC_USE_WAIT) || defined(__DOXYGEN__)
-#define DAC_USE_WAIT                        TRUE
+#define DAC_USE_WAIT                        FALSE
 #endif
 
 /**
@@ -298,7 +298,7 @@
  * @note    Disabling this option saves both code and data space.
  */
 #if !defined(DAC_USE_MUTUAL_EXCLUSION) || defined(__DOXYGEN__)
-#define DAC_USE_MUTUAL_EXCLUSION            TRUE
+#define DAC_USE_MUTUAL_EXCLUSION            FALSE
 #endif
 
 /*===========================================================================*/
diff --git a/cfg/mcuconf.h b/cfg/mcuconf.h
index 3a246fa..929e049 100644
--- a/cfg/mcuconf.h
+++ b/cfg/mcuconf.h
@@ -32,9 +32,8 @@
 #define MCUCONF_H
 
 #define STM32L4xx_MCUCONF
-//#define STM32L476_MCUCONF
-#define STM32L432_MCUCONF
-//#define STM32L433_MCUCONF
+#define STM32L476_MCUCONF
+//#define STM32L432_MCUCONF
 
 /*
  * HAL driver system settings.
diff --git a/source/main.cpp b/source/main.cpp
index 43abc22..414d2f7 100644
--- a/source/main.cpp
+++ b/source/main.cpp
@@ -21,7 +21,8 @@
 
 constexpr unsigned int MAX_ELF_FILE_SIZE = 8 * 1024;
 constexpr unsigned int MAX_ERROR_QUEUE_SIZE = 8;
-constexpr unsigned int MAX_SAMPLE_BUFFER_SIZE = 8000;
+constexpr unsigned int MAX_SAMPLE_BUFFER_SIZE = 6000;
+constexpr unsigned int MAX_SIGGEN_BUFFER_SIZE = 3000;
 
 enum class RunStatus : char
 {
@@ -61,7 +62,7 @@ static Error error_queue_pop()
 static msg_t conversionMBBuffer[4];
 static MAILBOX_DECL(conversionMB, conversionMBBuffer, 4);
 
-static THD_WORKING_AREA(conversionThreadWA, 1024);
+static THD_WORKING_AREA(conversionThreadWA, 2048);
 static THD_FUNCTION(conversionThread, arg);
 
 static time_measurement_t conversion_time_measurement;
@@ -80,7 +81,7 @@ static std::array<dacsample_t, CACHE_SIZE_ALIGN(dacsample_t, MAX_SAMPLE_BUFFER_S
 #if CACHE_LINE_SIZE > 0
 CC_ALIGN(CACHE_LINE_SIZE)
 #endif
-static std::array<dacsample_t, CACHE_SIZE_ALIGN(dacsample_t, MAX_SAMPLE_BUFFER_SIZE)> dac2_samples;
+static std::array<dacsample_t, CACHE_SIZE_ALIGN(dacsample_t, MAX_SIGGEN_BUFFER_SIZE)> dac2_samples;
 
 static uint8_t elf_file_store[MAX_ELF_FILE_SIZE];
 static elf::entry_t elf_entry = nullptr;
@@ -116,7 +117,7 @@ int main()
 }
 
 static unsigned int dac_sample_count = MAX_SAMPLE_BUFFER_SIZE;
-static unsigned int dac2_sample_count = MAX_SAMPLE_BUFFER_SIZE;
+static unsigned int dac2_sample_count = MAX_SIGGEN_BUFFER_SIZE;
 static unsigned int adc_sample_count = MAX_SAMPLE_BUFFER_SIZE;
 
 void main_loop()
@@ -160,7 +161,7 @@ void main_loop()
                 case 'D':
                     if (usbserial::read(&cmd[1], 2) == 2) {
                         unsigned int count = cmd[1] | (cmd[2] << 8);
-                        if (count <= MAX_SAMPLE_BUFFER_SIZE / 2) {
+                        if (count <= MAX_SIGGEN_BUFFER_SIZE) {
                             dac2_sample_count = count;
                             usbserial::read(&dac2_samples[0], dac2_sample_count * sizeof(dacsample_t));
                         } else {