使用赋码仪主板 app升级，方案升级验证通过

source/interface/if_can.c

@@ -369,6 +369,8 @@ static int h_init(uart_def *u,int bsp)
 {
   h_self_def *h=&g_hself;
   if(h->inited) return 0;
+  // 设置主机接口 int类型，0uart，1can
+  app_variable("host_if",&h->dev_index,0);
   h->dev[0]=dev_get("uart1");
   h->dev[1]=dev_get("can");
   h->dev[0]->init(h->dev[0],0);

source/interface/if_uart.c

@@ -386,6 +386,9 @@ static int write_block(uart_def *u,const uint8_t *b,int len)
   param_check(u->private_data);
   self_data *self=u->private_data;
   USART_TypeDef *uart=self->dtb->uart;
+  if(self->in_send){
+    return 0;
+  }
   self->in_send=1;
   if(1){
     dma_tx_init(self,b,len);