UART问题

Hi Phillipp:

I will discuss these questions internally at Dialog and post a reply.

谢谢，

TR_DIALOG

Hi,

Here is the information I gathered. I would like to post it as they are important guidelines:

1) Please note that adapters is anLLD顶部的附加层(low level drivers) and are not implemented as separate tasks. This is the reason why如果禁用或扰乱相应外围模块的正常操作，它们无法正常工作。因此，您要么直接使用UART LLD（在HW_UART.H文件中描述）或UART适配器（描述于AD_UART.H文件）without intervening在UART LLD。

Tip:We recommend the usage of adapters for accessing hardware peripherals because not only provide access to the peripheral, but also make sure that other tasks which are currently accessing it, suspend their operation until the peripheral is once again released. So you don't have to worry if another task tries accessing the same peripheral at the same time.

2) As far as the 1st part of this query is concerned the same apply and in this case (if you disable the DMA hardware peripheral you will not be able to use successfully the adapters). Now, a few things about DMAs. So far you are aware of the interrupt-driven concepts i.e. a character is arrived on the RX pin of your MCU and an interrupt is triggered so you can read that character from the receiver and all this with CPU interval. DMAs is a feature which gives you the opportunity to make all your transfers from/to a peripheralwithout CPU interval, in other words DMAs can run simultaneously with the CPU.

Tip:It is your choice if you work with DMAs or not, depending on the application you work with but, if there are many characters to be sent it will be preferable to use DMAs and not forcing the CPU to do this task, depriving the latter to execute other crucial tasks.

3) As far as the超时输入参数ad_uart_read()function is concerned there are two options to work with. The first one is to set it equal toOS_EVENT_FOREVR这迫使应用程序斯图ck until all the amount of data (specified with the second input parameter of this function) is received. In all other cases, function can exit after timeout with less bytes than requested.This means that your application does not stuck waiting for all amount of data.

4) You must define两个都dg_configUART2_SOFTWARE_FIFO_SIZE和dg_configuart_software_fifo.macros. The first definition determines the amount of allocated space and the second one启用与否使用AD_UART_SET_SOFT_FIFO（）函数。

5) By default P1_3 and P2_3 pins are reserved by the bootloader as UART_TX and UART_RX respectively.
虽然您可以更改默认映射（请参阅可用的配置选项Table 6: Scanning steps for booting from serialof datasheet) it
is not recommended as it requires bootROM changes. Instead, you can use any other available ADC pins as depicted onTable 2: Pin descriptionof DA14681-01_2v3.pdf

谢谢，

TR_DIALOG