#include "project.h"
extern uint32_t dfu_flag;

void
sys_tick_handler (void)
{
uint8_t d;

while (!ring_read_byte(&rx1_ring,&d)) 
	kvm_recv(d);

while (!ring_read_byte(&rx2_ring,&d))
	kvm_recv(d);

led_tick();
}

int
main (void)
{


//  rcc_clock_setup_in_hsi_out_48mhz ();
  //nvic_set_priority_grouping(NVIC_PriorityGroup_4);

  /*set up pll*/
  rcc_clock_setup_in_hse_8mhz_out_72mhz();

  /*turn on clocks to periferals*/
  rcc_periph_clock_enable (RCC_GPIOA);
  rcc_periph_clock_enable (RCC_GPIOB);
  rcc_periph_clock_enable (RCC_GPIOC);
  rcc_periph_clock_enable (RCC_USART1);
  rcc_periph_clock_enable (RCC_USART2);
  rcc_periph_clock_enable (RCC_USART3);
  rcc_periph_clock_enable (RCC_AFIO);

  led_init();
  usart_init ();
  usb_init ();

  /*Start periodic timer*/

  systick_set_clocksource (STK_CSR_CLKSOURCE_AHB_DIV8);
  /* 48MHz / 8 = > 6Mhz */
  systick_set_reload (6000);
  /* 6MHz / 6000 => 1kHz */
  systick_interrupt_enable ();
  systick_counter_enable ();

  /*Adjust interrupt priorities so that uarts trump timer*/
  nvic_set_priority(NVIC_USART1_IRQ, 0x40);
  nvic_set_priority(NVIC_USART2_IRQ, 0x40);
  nvic_set_priority(NVIC_USART3_IRQ, 0x40);
  nvic_set_priority(NVIC_SYSTICK_IRQ, 0xff);

  led_clear();

#if 0
  /*GPIO C11 was used to determine if we should enter dfu */
  /*now we use a ramdom address in ram*/
  gpio_set (GPIOC, GPIO11);
  gpio_set_mode (GPIOC, GPIO_MODE_OUTPUT_2_MHZ,
                 GPIO_CNF_OUTPUT_PUSHPULL, GPIO11);
 

  {
  int i;
  for (i = 0; i < 0x80000; i++)
    __asm__ ("nop");
  }

  gpio_clear (GPIOC, GPIO11);
#endif

  printf ("stm32_usb_kvm:\r\n");
  printf ("dfu_flag=%08lx\r\n", dfu_flag);

  usb_run ();

  return 0;
}