This section describes the programming interface of the UART Cortex Microcontroller Software Interface Standard (CMSIS) driver. And this driver defines generic peripheral driver interfaces for middleware making it reusable across a wide range of supported microcontroller devices. The API connects microcontroller peripherals with middleware that implements for example communication stacks, file systems, or graphic user interfaces. More information and usage methord please refer to http://www.keil.com/pack/doc/cmsis/Driver/html/index.html.

The UART driver includes transactional APIs.

Transactional APIs can be used to enable the peripheral quickly and in the application if the code size and performance of transactional APIs can satisfy the requirements. If the code size and performance are critical requirements please write custom code.

Function groups

UART CMSIS GetVersion Operation

This function group will return the UART CMSIS Driver version to user.

UART CMSIS GetCapabilities Operation

This function group will return the capabilities of this driver.

UART CMSIS Initialize and Uninitialize Operation

This function will initialize and uninitialize the uart instance . And this API must be called before you configure an uart instance or after you Deinit an uart instance.The right steps to start an instance is that you must initialize the instance which been slected firstly,then you can power on the instance.After these all have been done,you can configure the instance by using control operation.If you want to Uninitialize the instance, you must power off the instance first.

UART CMSIS Transfer Operation

This function group controls the transfer, send/receive data.

UART CMSIS Status Operation

This function group gets the UART transfer status.

UART CMSIS Control Operation

This function can configure an instance ,set baudrate for uart, get current baudrate ,set transfer data bits and other control command.