1.修复mr_printf错误。

Kconfig

@@ -56,10 +56,10 @@ menu "Device configure"
             "Enable or disable non-blocking read/write for the console device."
     endmenu
 
-    config MR_USING_PRINTF_BUFSZ
+    config MR_CFG_PRINTF_BUFSZ
         int "Size of printf buffer"
         default 128
-        range 16 2147483647
+        range 32 2147483647
         help
         	"This option sets the size of the buffer used for printf operations."
 

document/device/timer.md

@@ -167,7 +167,7 @@ int timer_init(void)
     /* 打印TIMER描述符 */
     mr_printf("TIMER desc: %d\r\n", timer_ds);
     /* 设置超时回调函数 */
-    mr_dev_ioctl(led_ds, MR_CTL_TIMER_SET_TIMEOUT_CALL, timeout_call);
+    mr_dev_ioctl(timer_ds, MR_CTL_TIMER_SET_TIMEOUT_CALL, timeout_call);
     /* 设置定时时间 */
     uint32_t timeout = TIMEOUT;
     int ret = mr_dev_write(timer_ds, &timeout, sizeof(timeout));

source/service.c

@@ -375,10 +375,10 @@ MR_WEAK int mr_printf_output(const char *buf, size_t size)
  */
 int mr_printf(const char *fmt, ...)
 {
-#ifndef MR_USING_PRINTF_BUFSZ
+#ifndef MR_CFG_PRINTF_BUFSZ
 #define MR_USING_PRINTF_BUFSZ           (128)
-#endif /* MR_USING_PRINTF_BUFSZ */
-    char buf[MR_USING_PRINTF_BUFSZ] = {0};
+#endif /* MR_CFG_PRINTF_BUFSZ */
+    char buf[MR_CFG_PRINTF_BUFSZ] = {0};
     va_list args;
 
     va_start(args, fmt);