[Mod] 解决GCC版本，串口无法接收问题

NSPE/WIFI_IOT/app/main.c

@@ -147,26 +147,6 @@ void start_task(void *p_arg)
     app_init();
 #endif
 
-#if defined (CONFIG_GY3513)
-#if 0
-    printf("reading input from file... ");
-    fflush(stdout);
-
-    filename = "Test.txt";
-    LWIP_ASSERT("invalid filename", filename != NULL);
-    f = fopen(filename, "rb");
-    LWIP_ASSERT("open failed", f != NULL);
-    len = fread(pktbuf, 1, sizeof(pktbuf), f);
-    len = fwrite(pktbuf, 1, sizeof(pktbuf), f);
-    fclose(f);
-    printf("testing file: \"%s\"...\r\n", filename);
-#else
-    fprintf(stdout, "What is your name?\r\n");
-    fscanf(stdin, "%s", read_buf);
-    fprintf(stdout, "\nHello, %s\r\n", read_buf);
-#endif
-#endif // CONFIG_GY3513
-
     sys_task_delete(NULL);
 }
 

NSPE/WIFI_IOT/bsp/uart.c

@@ -37,6 +37,7 @@ OF SUCH DAMAGE.
 #include "app_cfg.h"
 #include "bsp_inc.h"
 #include "gd32w51x_usart.h"
+#include "platform_def.h"
 #include "uart.h"
 #include "malloc.h"
 #include "wifi_netlink.h"
@@ -90,6 +91,31 @@ int _write(int fd, char *str, int len)
 
     return i;
 }
+
+int _read(int handle, char *buffer, int size)
+{
+    uint8_t ch     = 0U;
+    int actualSize = 0;
+
+    /* This function only reads from "standard in", for all other file handles it returns failure. */
+    if (handle != 0) {
+        return -1;
+    }
+
+    /* Receive data. */
+    for (; size > 0; size--) {
+        while(RESET == usart_flag_get(LOG_UART, USART_FLAG_RBNE));
+
+        *buffer++ = (char)usart_data_receive(LOG_UART);
+        actualSize++;
+
+        if ((ch == 0U) || (ch == (uint8_t)'\n') || (ch == (uint8_t)'\r')) {
+            break;
+        }
+    }
+
+    return (actualSize > 0) ? actualSize : -1;
+}
 #endif
 
 /*!
@@ -134,7 +160,7 @@ void usart_config(uint32_t usart_periph)
     usart_baudrate_set(usart_periph, 115200);
     usart_receive_config(usart_periph, USART_RECEIVE_ENABLE);
     usart_transmit_config(usart_periph, USART_TRANSMIT_ENABLE);
-    //usart_interrupt_enable(usart_periph, USART_INT_RBNE);
+    usart_interrupt_enable(usart_periph, USART_INT_RBNE);
     usart_enable(usart_periph);
 }