fw/main.c (e5514ed) - mips_sys · BlinkenArea

main.c

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

//#define CFG_SIMULATION

#define CFG_ETH_RX
#define CFG_ETH_TX
#define CFG_UART
#ifdef CFG_SIMULATION
# define CFG_UART_CHK
#else
# define CFG_DELAY
# define CFG_LCD
# define CFG_SWITCHES
#endif

const int myconst = 0x12345678;

int myvar = 0x11223344;

volatile int data[100];

#ifdef CFG_ETH_TX
  static const unsigned char example_packet[] = {
    0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, /* destination MAC */
    0x02, 0x03, 0x04, 0x05, 0x06, 0x07, /* source MAC */
    0x08, 0x00, /* ethertype: IP */
    0x45, 0x00, 0x00, 0x36, /* IP header: ..., len */
    0x12, 0x34, 0x00, 0x00, /* IP header: ..., not fragmented */
    0x40, 0x11, 0x00, 0x00, /* IP header: ..., UDP, ... */
    0x7F, 0x00, 0x00, 0x01, /* source IP */
    0xFF, 0xFF, 0xFF, 0xFF, /* destination IP */
    0x00, 0x01, 0x00, 0x01, /* UDP: source port, destination port */
    0x00, 0x22, 0x00, 0x00, /* UDP: len, ... */
    'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm',
    'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z'
  };
#endif

void switches(void)
{
#ifdef CFG_LCD
#ifdef CFG_SWITCHES
  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' : ' ');
#endif
#endif

#ifdef CFG_LCD
#ifdef CFG_SWITCHES
  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));
#endif
#endif
}

void delay(void)
{
  unsigned int i;
#ifdef CFG_ETH_RX
  void *vptr;
  unsigned char *ptr;
  unsigned int sz;
#endif

for (i = 0; i < 10; ++i) {
    switches();
#ifdef CFG_ETH_RX
    while (eth_rx(&vptr, &sz)) {
      ptr = vptr;
#ifdef CFG_UART
      for ( ; sz > 0; ptr++, sz--)
        uart_tx(*ptr);
#endif
    }
#endif
#ifdef CFG_DELAY
    cyc_cnt_delay_ms(20);
#endif
  }
}

int main()
{
  unsigned int i;
  unsigned short chr;
  unsigned char leds;

leds_set_state(0x01);

for (i = 0; i < sizeof(data) / sizeof(data[0]); ++i)
    data[i] = i;

leds_set_state(0x02);

#ifdef CFG_ETH_RX
  eth_rx_init();
#endif

leds_set_state(0x04);

#ifdef CFG_LCD
  lcd_init();
  lcd_str(0, "MIPS I system");
  lcd_str(1, "");
#endif

leds_set_state(0x08);

#ifdef CFG_UART
  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');
#ifdef CFG_UART_CHK
  if (uart_rx() != 'M') while(1);
  if (uart_rx() != 'I') while(1);
  if (uart_rx() != 'P') while(1);
  if (uart_rx() != 'S') while(1);
  if (uart_rx() != ' ') while(1);
  if (uart_rx() != 'I') while(1);
  if (uart_rx() != '\r') while(1);
  if (uart_rx() != '\n') while(1);
#endif
#endif

leds_set_state(0x10);

leds = 0x11;
  while (1) {
#ifdef CFG_UART
    if (uart_can_rx()) {
      chr = uart_rx();
      if (uart_is_err(chr))
        leds = 0;
      else
        leds = chr;
    }
#endif
    leds_set_state(leds);
    leds = leds << 1 | leds >> 7;
    delay();
#ifdef CFG_ETH_TX
#ifdef CFG_SWITCHES
    if (switches_get_state(sw_center))
#endif
      eth_tx(example_packet, sizeof(example_packet));
#endif
  }

return 0;
}

mips_sys

send ethernet packet on center button press