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diff --git a/.pio/build/micro/firmware.elf b/.pio/build/micro/firmware.elf
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diff --git a/.pio/build/project.checksum b/.pio/build/project.checksum
deleted file mode 100644
index e3b22f1..0000000
--- a/.pio/build/project.checksum
+++ /dev/null
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diff --git a/LICENSE b/LICENSE
deleted file mode 100644
index e142a52..0000000
--- a/LICENSE
+++ /dev/null
@@ -1,625 +0,0 @@
-GNU GENERAL PUBLIC LICENSE
-
-Version 3, 29 June 2007
-
-Copyright © 2007 Free Software Foundation, Inc.
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-Everyone is permitted to copy and distribute verbatim copies of this license
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diff --git a/README.md b/README.md
deleted file mode 100644
index 88e9e63..0000000
--- a/README.md
+++ /dev/null
@@ -1,3 +0,0 @@
-# synth
-
-Trying to make a software synthesizer for arduino
\ No newline at end of file
diff --git a/platformio.ini b/platformio.ini
index edd3068..e77d5d8 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -8,7 +8,7 @@
; Please visit documentation for the other options and examples
; https://docs.platformio.org/page/projectconf.html
-[env:micro]
-platform = atmelavr
-board = micro
-framework = arduino
+[env:nucleo_f302r8]
+platform = ststm32
+board = nucleo_f302r8
+framework = libopencm3
diff --git a/src/README.md b/src/README.md
new file mode 100644
index 0000000..e09f36f
--- /dev/null
+++ b/src/README.md
@@ -0,0 +1,19 @@
+# README
+
+Console on PA2 (tx only) 115200@8n1
+
+* Prints the ADC value on PA0 (adc channel 0) on the console
+* Echos half that ADC value out to DAC channel 2 on PA5
+* Prints the ADC value of PA1 (adc channel 1) to the console.
+
+Recommended wiring:
+* pot or any resistor ladder to PA0
+* jumper from PA5 to PA1
+
+example output:
+ ...
+ tick: 228: adc0= 3950, target adc1=1975, adc1=1979
+ tick: 229: adc0= 3949, target adc1=1974, adc1=1978
+ tick: 230: adc0= 3950, target adc1=1975, adc1=1979
+ tick: 231: adc0= 3949, target adc1=1974, adc1=1978
+ ...
diff --git a/src/adc-dac-printf.c b/src/adc-dac-printf.c
new file mode 100644
index 0000000..d86c541
--- /dev/null
+++ b/src/adc-dac-printf.c
@@ -0,0 +1,161 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2014 Karl Palsson
+ *
+ * This library is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This library 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. See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library. If not, see .
+ */
+
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+
+#define LED_DISCO_GREEN_PORT GPIOD
+#define LED_DISCO_GREEN_PIN GPIO12
+
+#define USART_CONSOLE USART2
+
+int _write(int file, char *ptr, int len);
+
+static void clock_setup(void)
+{
+ rcc_clock_setup_pll(&rcc_hse_8mhz_3v3[RCC_CLOCK_3V3_168MHZ]);
+ /* Enable GPIOD clock for LED & USARTs. */
+ rcc_periph_clock_enable(RCC_GPIOD);
+ rcc_periph_clock_enable(RCC_GPIOA);
+
+ /* Enable clocks for USART2 and dac */
+ rcc_periph_clock_enable(RCC_USART2);
+ rcc_periph_clock_enable(RCC_DAC);
+
+ /* And ADC*/
+ rcc_periph_clock_enable(RCC_ADC1);
+}
+
+static void usart_setup(void)
+{
+ /* Setup GPIO pins for USART2 transmit. */
+ gpio_mode_setup(GPIOA, GPIO_MODE_AF, GPIO_PUPD_NONE, GPIO2);
+
+ /* Setup USART2 TX pin as alternate function. */
+ gpio_set_af(GPIOA, GPIO_AF7, GPIO2);
+
+ usart_set_baudrate(USART_CONSOLE, 115200);
+ usart_set_databits(USART_CONSOLE, 8);
+ usart_set_stopbits(USART_CONSOLE, USART_STOPBITS_1);
+ usart_set_mode(USART_CONSOLE, USART_MODE_TX);
+ usart_set_parity(USART_CONSOLE, USART_PARITY_NONE);
+ usart_set_flow_control(USART_CONSOLE, USART_FLOWCONTROL_NONE);
+
+ /* Finally enable the USART. */
+ usart_enable(USART_CONSOLE);
+}
+
+/**
+ * Use USART_CONSOLE as a console.
+ * This is a syscall for newlib
+ * @param file
+ * @param ptr
+ * @param len
+ * @return
+ */
+int _write(int file, char *ptr, int len)
+{
+ int i;
+
+ if (file == STDOUT_FILENO || file == STDERR_FILENO) {
+ for (i = 0; i < len; i++) {
+ if (ptr[i] == '\n') {
+ usart_send_blocking(USART_CONSOLE, '\r');
+ }
+ usart_send_blocking(USART_CONSOLE, ptr[i]);
+ }
+ return i;
+ }
+ errno = EIO;
+ return -1;
+}
+
+static void adc_setup(void)
+{
+ gpio_mode_setup(GPIOA, GPIO_MODE_ANALOG, GPIO_PUPD_NONE, GPIO0);
+ gpio_mode_setup(GPIOA, GPIO_MODE_ANALOG, GPIO_PUPD_NONE, GPIO1);
+
+ adc_power_off(ADC1);
+ adc_disable_scan_mode(ADC1);
+ adc_set_sample_time_on_all_channels(ADC1, ADC_SMPR_SMP_3CYC);
+
+ adc_power_on(ADC1);
+
+}
+
+static void dac_setup(void)
+{
+ gpio_mode_setup(GPIOA, GPIO_MODE_ANALOG, GPIO_PUPD_NONE, GPIO5);
+ dac_disable(DAC1, DAC_CHANNEL2);
+ dac_disable_waveform_generation(DAC1, DAC_CHANNEL2);
+ dac_enable(DAC1, DAC_CHANNEL2);
+ dac_set_trigger_source(DAC1, DAC_CR_TSEL2_SW);
+}
+
+static uint16_t read_adc_naiive(uint8_t channel)
+{
+ uint8_t channel_array[16];
+ channel_array[0] = channel;
+ adc_set_regular_sequence(ADC1, 1, channel_array);
+ adc_start_conversion_regular(ADC1);
+ while (!adc_eoc(ADC1));
+ uint16_t reg16 = adc_read_regular(ADC1);
+ return reg16;
+}
+
+int main(void)
+{
+ int i;
+ int j = 0;
+ clock_setup();
+ usart_setup();
+ printf("hi guys!\n");
+ adc_setup();
+ dac_setup();
+
+ /* green led for ticking */
+ gpio_mode_setup(LED_DISCO_GREEN_PORT, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE,
+ LED_DISCO_GREEN_PIN);
+
+ while (1) {
+ uint16_t input_adc0 = read_adc_naiive(0);
+ uint16_t target = input_adc0 / 2;
+ dac_load_data_buffer_single(DAC1, target, DAC_ALIGN_RIGHT12, DAC_CHANNEL2);
+ dac_software_trigger(DAC1, DAC_CHANNEL2);
+ uint16_t input_adc1 = read_adc_naiive(1);
+ printf("tick: %d: adc0= %u, target adc1=%d, adc1=%d\n",
+ j++, input_adc0, target, input_adc1);
+
+ /* LED on/off */
+ gpio_toggle(LED_DISCO_GREEN_PORT, LED_DISCO_GREEN_PIN);
+
+ for (i = 0; i < 1000000; i++) { /* Wait a bit. */
+ __asm__("NOP");
+ }
+ }
+
+ return 0;
+}
diff --git a/src/main.cpp b/src/main.cpp
deleted file mode 100644
index 527c523..0000000
--- a/src/main.cpp
+++ /dev/null
@@ -1,18 +0,0 @@
-#include "Arduino.h"
-
-void setup() {
- delay(2000);
- DDRD = 0xFF;
-}
-
-void loop() {
- PORTD = 0x00;
- delay(1000);
- PORTD = 0xFF;
- delay(1000);
- PORTD = 0x7F;
- delay(1000);
- PORTD = 0xF7;
- delay(1000);
-
-}