c_soft/riscv/startup/main.c

#include "stdint.h"
#include "stdio.h"
#include "stdarg.h"
#include "head.h"
#include "rtthread.h"

#define PRINT_BASE_ADDR *(uint8_t *)0x40000000

int my_putc(int c) {
  PRINT_BASE_ADDR = c;
  return c;
}


int my_puts(const char *s,int len) {
  for (int i = 0;i < len;i++) {
    my_putc(s[i]);
  }
  return 0;
}

static char g_print_buff[1024];
int my_printf(const char* fmt, ...) {
  int len = 0;
  va_list args;
  va_start(args, fmt);
  len = vsnprintf(g_print_buff, 1024, fmt, args);
  va_end(args);
  my_puts(g_print_buff, len);
  return len;
}





char g_string[] = "string from ram";




void task1(void* par) {
  (void)par;
  while (1) {
    my_printf("task1: %s\n", g_string);
    rt_thread_delay(500);
  }
}





int main()
{
  my_printf("Hello World! %s\n", "Andy");
  // cpu_test();

  rt_thread_t t = rt_thread_create("task1", task1, 0, 1024, 10, 10);
  (void)t;
  rt_thread_startup(t);
  my_printf("enter while 1\n");
  while (1) {
    my_printf("main: %s\n", g_string);
    rt_thread_delay(1000);
  }
  return 0;
}