unleashed-firmware/target_f2/Src/flipper_hal.c

/*
Flipper devices inc.

GPIO and HAL implementations
*/

#include "main.h"
#include "flipper_hal.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);
}