enlarge uart buffer

Signed-off-by: zhaijunyuan <1045598574@qq.com>

src/config.h

@@ -1,8 +1,22 @@
 #ifndef __TARGET_CONFIG_H__
 #define __TARGET_CONFIG_H__
+
 #define TARGET_HAS_USART1 1
+
 #define TARGET_HAS_USART2 1
+#define TARGET_USART2_RX_BUFFER_SIZE (4096)
+#define TARGET_USART2_TX_BUFFER_SIZE (4096)
+
 #define TARGET_HAS_USART3 1
+#define TARGET_USART3_RX_BUFFER_SIZE (4096)
+#define TARGET_USART3_TX_BUFFER_SIZE (4096)
+
 #define TARGET_HAS_USART4 1
+#define TARGET_USART4_RX_BUFFER_SIZE (4096)
+#define TARGET_USART4_TX_BUFFER_SIZE (4096)
+
 #define TARGET_HAS_USART6 1
+#define TARGET_USART6_RX_BUFFER_SIZE (4096)
+#define TARGET_USART6_TX_BUFFER_SIZE (4096)
+
 #endif

src/main.c

@@ -118,6 +118,10 @@ static void loopback()
 int main()
 {
     serial_setup(&serial0, 115200, 8, SERIAL_STOPBITS_1);
+
+    serial_setup(&serial3, 115200, 8, SERIAL_STOPBITS_1);
+    serial_setup(&serial5, 115200, 8, SERIAL_STOPBITS_1);
+
     gpio_init(PK7 | PK6, GPIO_OUTPUT | GPIO_SPEED_FAST);
     gpio_write(PK7 | PK6, 0);