diff --git a/app/app_hal.c b/app/app_hal.c
new file mode 100644
index 00000000..96ef1753
--- /dev/null
+++ b/app/app_hal.c
@@ -0,0 +1,59 @@
+/*
+Flipper devices inc.
+
+GPIO and HAL implementations
+*/
+
+#include "main.h"
+#include "gpio.h"
+
+void app_gpio_init(GpioPin gpio, GpioMode mode) {
+    if(gpio.pin != 0) {
+        GPIO_InitTypeDef GPIO_InitStruct;
+
+        GPIO_InitStruct.Pin = gpio.pin;
+        GPIO_InitStruct.Pull = GPIO_NOPULL;
+
+        switch(mode) {
+            case GpioModeInput:
+                GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
+            break;
+
+            case GpioModeOutput: 
+                GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
+                GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_MEDIUM;
+            break;
+
+            case GpioModeOpenDrain:
+                GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_OD;
+                GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_MEDIUM;
+            break;
+        }
+
+        HAL_GPIO_Init(gpio.port, &GPIO_InitStruct);
+    }
+}
+
+// TODO delay from timer
+void delay_us(uint32_t time) {
+  time *= 11.8;
+
+  while(time--) {}
+}
+
+void pwm_set(float value, float freq, TIM_HandleTypeDef* tim, uint32_t channel) {
+    tim->Init.CounterMode = TIM_COUNTERMODE_UP;
+    tim->Init.Period = (uint32_t)((SystemCoreClock/tim->Init.Prescaler)/freq);
+    tim->Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
+    tim->Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;
+    HAL_TIM_PWM_Init(tim);
+
+    TIM_OC_InitTypeDef sConfigOC;
+  
+    sConfigOC.OCMode = TIM_OCMODE_PWM1;
+    sConfigOC.Pulse = (uint16_t)(291 * value);
+    sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;
+    sConfigOC.OCFastMode = TIM_OCFAST_DISABLE;
+    HAL_TIM_PWM_ConfigChannel(tim, &sConfigOC, channel);
+    HAL_TIM_PWM_Start(tim, channel);
+}
\ No newline at end of file
diff --git a/app/app_hal.h b/app/app_hal.h
new file mode 100644
index 00000000..3a33aaed
--- /dev/null
+++ b/app/app_hal.h
@@ -0,0 +1,100 @@
+/*
+Flipper devices inc.
+
+GPIO and HAL implementations
+*/
+
+#pragma once
+
+#include <stdbool.h>
+#include "main.h"
+
+typedef enum {
+    GpioModeInput,
+    GpioModeOutput,
+    GpioModeOpenDrain
+} GpioMode;
+
+typedef struct {
+    GPIO_TypeDef* port;
+    uint32_t pin;
+} GpioPin;
+
+void app_gpio_init(GpioPin gpio, GpioMode mode);
+
+inline void app_gpio_write(GpioPin gpio, bool state) {
+    if(gpio.pin != 0) {
+        if(state) {
+            gpio.port->BSRR = (uint32_t)gpio.pin;
+        } else {
+            gpio.port->BRR = (uint32_t)gpio.pin;
+        }
+    }
+}
+
+inline bool app_gpio_read(GpioPin gpio) {
+    if(gpio.pin != 0) {
+        return (gpio.port->IDR & gpio.pin) != 0x00u;
+    }
+
+    return false;
+}
+
+void delay_us(uint32_t time);
+
+void pwm_set(float value, float freq, TIM_HandleTypeDef* tim, uint32_t channel);
+
+extern TIM_HandleTypeDef htim8;
+
+inline void app_tim_ic_init(bool both) {
+    HAL_TIM_OC_Stop(&htim8, TIM_CHANNEL_2);
+
+    TIM_IC_InitTypeDef sConfigIC = {0};
+    sConfigIC.ICPolarity = both ? TIM_INPUTCHANNELPOLARITY_BOTHEDGE : TIM_INPUTCHANNELPOLARITY_FALLING;
+    sConfigIC.ICSelection = TIM_ICSELECTION_DIRECTTI;
+    sConfigIC.ICPrescaler = TIM_ICPSC_DIV1;
+    sConfigIC.ICFilter = 0;
+    HAL_TIM_IC_ConfigChannel(&htim8, &sConfigIC, TIM_CHANNEL_2);
+
+    HAL_TIM_IC_Start_IT(&htim8, TIM_CHANNEL_2);
+}
+
+inline void app_tim_pulse(uint32_t width) {
+    htim8.State = HAL_TIM_STATE_BUSY;
+
+    __HAL_TIM_DISABLE(&htim8);
+
+    __HAL_TIM_SET_COUNTER(&htim8, 0);
+
+    TIM_OC_InitTypeDef sConfigOC;
+    sConfigOC.OCMode = TIM_OCMODE_INACTIVE;
+    sConfigOC.Pulse = (uint16_t)(width);
+    sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;
+    sConfigOC.OCFastMode = TIM_OCFAST_DISABLE;
+    // HAL_TIM_OC_ConfigChannel(&htim8, &sConfigOC, TIM_CHANNEL_2);
+
+    htim8.Lock = HAL_LOCKED;
+
+    /* Configure the TIM Channel 2 in Output Compare */
+    TIM_OC2_SetConfig(htim8.Instance, &sConfigOC);
+
+    htim8.Lock = HAL_UNLOCKED;
+
+    // TIM_CCxChannelCmd(htim8.Instance, TIM_CHANNEL_2, TIM_CCx_ENABLE);
+
+    /* Reset the CCxE Bit */
+    htim8.Instance->CCER &= ~(TIM_CCER_CC1E << (TIM_CHANNEL_2 & 0x1FU));
+
+    /* Set or reset the CCxE Bit */
+    htim8.Instance->CCER |= (uint32_t)(TIM_CCx_ENABLE << (TIM_CHANNEL_2 & 0x1FU));
+
+    __HAL_TIM_MOE_ENABLE(&htim8);
+    __HAL_TIM_ENABLE(&htim8);
+
+    htim8.State = HAL_TIM_STATE_READY;
+}
+
+inline void app_tim_stop() {
+    HAL_TIM_OC_Stop(&htim8, TIM_CHANNEL_2);
+    HAL_TIM_IC_Stop(&htim8, TIM_CHANNEL_2);
+}
\ No newline at end of file