From 46d1e933f5c1b658fa544f5bfac4f871ab3675cb Mon Sep 17 00:00:00 2001
From: andy <1414772332@qq.com>
Date: Thu, 17 Apr 2025 19:17:03 +0800
Subject: [PATCH] =?UTF-8?q?=E5=AE=9E=E7=8E=B0printf=E5=87=BD=E6=95=B0?=
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---
 riscv/main.c | 42 +++++++++++++++++++++++++++++-------------
 1 file changed, 29 insertions(+), 13 deletions(-)

diff --git a/riscv/main.c b/riscv/main.c
index 2f7ce0b..efc1d72 100644
--- a/riscv/main.c
+++ b/riscv/main.c
@@ -1,5 +1,6 @@
 #include "stdint.h"
-
+#include "stdio.h"
+#include "stdarg.h"
 
 #define PRINT_BASE_ADDR *(uint8_t *)0x40000000
 
@@ -9,29 +10,44 @@ int my_putc(int c) {
 }
 
 
-int my_puts(char *s) {
-  while (*s) {
-    my_putc(*s);
-    s++;
+int my_puts(char *s,int len) {
+  for (int i = 0;i < len;i++) {
+    my_putc(s[i]);
   }
-  // for (int i = 0;i < 10;i++) {
-  //   my_putc(*s);
-  //   s++;
-  // }
   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;
+}
+
+
 
 
 int add(int a, int b) {
   return a+b;
 }
 
+
+char g_string[] = "string from ram";
+
+
 int main()
 {
-  // int a=1;
-  // int b=2;
-  // int c = add(a, b);
-  my_puts("Hello World!\n");
+  int a=1;
+  int b=2;
+  int c = add(a, b);
+  my_printf("Hello World! %s\n", "Andy");
+  my_printf("add(%d, %d)=%d\n", a, b, c);
+  a = 67;b = 78;
+  my_printf("mul(%d, %d)=%d\n", a, b, a * b);
+  my_printf("ram_val test: %s\n", g_string);
   return 0;
 }
\ No newline at end of file