fw/main.c (cc0f06d) - mips_sys · BlinkenArea

main.c

#include "arp.h"
#include "cyc_cnt.h"
#include "eth.h"
#include "lcd.h"
#include "leds.h"
#include "uart.h"
#include "switches.h"

unsigned char leds_val = 0x88;

void switches(void)
{
  lcd_chr(1, 0, switches_get_state(sw_0) ? '0' : ' ');
  lcd_chr(1, 1, switches_get_state(sw_1) ? '1' : ' ');
  lcd_chr(1, 2, switches_get_state(sw_2) ? '2' : ' ');
  lcd_chr(1, 3, switches_get_state(sw_3) ? '3' : ' ');
  lcd_chr(1, 4, switches_get_state(sw_east) ? 'E' : ' ');
  lcd_chr(1, 5, switches_get_state(sw_north) ? 'N' : ' ');
  lcd_chr(1, 6, switches_get_state(sw_south) ? 'S' : ' ');
  lcd_chr(1, 7, switches_get_state(sw_west) ? 'W' : ' ');
  lcd_chr(1, 8, switches_get_state(sw_center) ? 'C' : ' ');
  lcd_chr(1, 9, switches_get_state(sw_rot_a) ? 'a' : ' ');
  lcd_chr(1, 10, switches_get_state(sw_rot_b) ? 'b' : ' ');

unsigned int cnt = switches_get_rot_cnt();
  lcd_chr(1, 12, '0' + (cnt >> 9 & 0x7));
  lcd_chr(1, 13, '0' + (cnt >> 6 & 0x7));
  lcd_chr(1, 14, '0' + (cnt >> 3 & 0x7));
  lcd_chr(1, 15, '0' + (cnt & 0x7));
}

void leds_uart(void)
{
  unsigned short chr;

while (uart_can_rx()) {
    chr = uart_rx();
    if (uart_is_err(chr))
      leds_val = 0;
    else
      leds_val = chr;
    leds_set_state(leds_val);
  }
}

void eth_task(void)
{
  void *vptr;
  unsigned int sz, i;
  unsigned char *ptr;

while (eth_rx(&vptr, &sz)) {
    ptr = vptr;
    for (i = 0; i < sz; ++i)
      uart_tx(ptr[i]);
    ethernet_recv(vptr, sz);
  }
}

void tasks(void)
{
  switches();
  leds_uart();
  eth_task();
}

void leds_tick200(void)
{
  leds_val = leds_val << 1 | leds_val >> 7;
  leds_set_state(leds_val);
}

void tick200(void)
{
  leds_tick200();
  arp_tick200();
}

int main()
{
  unsigned int i;

leds_set_state(0x01);

eth_mac_init();
  eth_rx_init();

leds_set_state(0x02);

lcd_init();
  lcd_str(0, "MIPS I system");
  lcd_str(1, "");

leds_set_state(0x04);

uart_cfg_scale(62); /* 115200 */
  uart_cfg_bits(8);
  uart_cfg_stop(1);
  uart_tx('M');
  uart_tx('I');
  uart_tx('P');
  uart_tx('S');
  uart_tx(' ');
  uart_tx('I');
  uart_tx('\r');
  uart_tx('\n');

leds_set_state(0x08);

arp_init();

leds_set_state(0x10);

while (1) {
    for (i = 0; i < 20; ++i) {
      tasks();
      cyc_cnt_delay_ms(10);
    }
    tick200();
  }

return 0;
}

mips_sys

implementation of ethernet and ARP (not completely working yet, hangs on received ARP request)