void Task1(void* args)
{
	osDelay(1000);
	char TxBf[] = "HelloDMA0";
	//HAL_UART_Transmit_DMA(&huart1, (uint8_t*)TxBf, sizeof(TxBf));
	while (1) {

		//HAL_DMA_RegisterCallback(&hdma_usart1_tx, HAL_DMA_XFER_CPLT_CB_ID, Uart1_DMA_TxComplete);
		HAL_UART_Transmit_DMA(&huart1, (uint8_t*)TxBf, sizeof(TxBf)-1);
		//osEventFlagsWait(Uart1_Recv_Event, 01, osFlagsWaitAny, osWaitForever);
		/*__HAL_DMA_CLEAR_FLAG(&hdma_usart1_tx, DMA_FLAG_TC4);
		while (__HAL_DMA_GET_FLAG(&hdma_usart1_tx, DMA_FLAG_TC4) == 0);*/
		while(huart1.gState != HAL_UART_STATE_READY)
		{}	
		
		osDelay(1);
	}
}

DMA发送字符串 串口助手显示数据错乱,原因是C语言字符最后有个\0  串口助手显示错乱