64 lines
1.0 KiB
C
64 lines
1.0 KiB
C
#include "stdint.h"
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#include "stdio.h"
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#include "stdarg.h"
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#include "head.h"
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#define PRINT_BASE_ADDR *(uint8_t *)0x40000000
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int my_putc(int c) {
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PRINT_BASE_ADDR = c;
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return c;
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}
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int my_puts(char *s,int len) {
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for (int i = 0;i < len;i++) {
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my_putc(s[i]);
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}
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return 0;
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}
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static char g_print_buff[1024];
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int my_printf(const char* fmt, ...) {
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int len = 0;
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va_list args;
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va_start(args, fmt);
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len = vsnprintf(g_print_buff, 1024, fmt, args);
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va_end(args);
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my_puts(g_print_buff, len);
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return len;
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}
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int add(int a, int b) {
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return a+b;
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}
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char g_string[] = "string from ram";
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int main()
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{
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int a=1;
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int b=2;
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typedef void (*fun_t)(void);
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fun_t fun = (fun_t)0;
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fun();
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int c = add(a, b);
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my_printf("Hello World! %s\n", "Andy");
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my_printf("add(%d, %d)=%d\n", a, b, c);
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a = 67;b = -78;
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fun=(fun_t)0xff000000;
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fun();
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my_printf("mul(%d, %d)=%d\n", a, b, a * b);
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my_printf("ram_val test: %s\n", g_string);
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set_csr(mstatus, 0x00000008);
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set_csr(mie, (1 << 3));
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set_csr(mip, (1 << 3));
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cpu_test();
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return 0;
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} |