#define LED_Pin LL_GPIO_PIN_4
#define LED_GPIO_Port GPIOA

#include "stm32g0xx_ll_rcc.h"
#include "stm32g0xx_ll_bus.h"
#include "stm32g0xx_ll_crs.h"
#include "stm32g0xx_ll_system.h"
#include "stm32g0xx_ll_exti.h"
#include "stm32g0xx_ll_cortex.h"
#include "stm32g0xx_ll_utils.h"
#include "stm32g0xx_ll_pwr.h"
#include "stm32g0xx_ll_dma.h"
#include "my_printf.h"

void SystemClock_Config(void)
{
  LL_FLASH_SetLatency(LL_FLASH_LATENCY_2);
  while(LL_FLASH_GetLatency() != LL_FLASH_LATENCY_2);

  /* HSI configuration and activation */
  LL_RCC_HSI_Enable();
  while(LL_RCC_HSI_IsReady() != 1);

  /* Main PLL configuration and activation */
  LL_RCC_PLL_ConfigDomain_SYS(LL_RCC_PLLSOURCE_HSI, LL_RCC_PLLM_DIV_1, 8, LL_RCC_PLLR_DIV_2);
  LL_RCC_PLL_Enable();
  LL_RCC_PLL_EnableDomain_SYS();
  while(LL_RCC_PLL_IsReady() != 1);

  /* Set AHB prescaler*/
  LL_RCC_SetAHBPrescaler(LL_RCC_SYSCLK_DIV_1);

  /* Sysclk activation on the main PLL */
  LL_RCC_SetSysClkSource(LL_RCC_SYS_CLKSOURCE_PLL);
  while(LL_RCC_GetSysClkSource() != LL_RCC_SYS_CLKSOURCE_STATUS_PLL);

  /* Set APB1 prescaler*/
  LL_RCC_SetAPB1Prescaler(LL_RCC_APB1_DIV_1);
  LL_Init1msTick(64000000);
  /* Update CMSIS variable (which can be updated also through SystemCoreClockUpdate function) */
  LL_SetSystemCoreClock(64000000);
}


int main(void)
{
  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
  LL_APB2_GRP1_EnableClock(LL_APB2_GRP1_PERIPH_SYSCFG);
  LL_APB1_GRP1_EnableClock(LL_APB1_GRP1_PERIPH_PWR);
  /** Disable the internal Pull-Up in Dead Battery pins of UCPD peripheral */
  //LL_SYSCFG_DisableDBATT(LL_SYSCFG_UCPD1_STROBE | LL_SYSCFG_UCPD2_STROBE);
  
  SystemClock_Config();
  my_printf_config(115200);
  
  
  while(1)
  {
    printf("Hello World\r\n");
    LL_mDelay(250);
  }
}