CMSIS-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 cmsis_uart_interrupt_transfer example shows how to use uart cmsis driver in interrupt way:In this example, one uart instance connect to PC through uart, the board willsend back all characters that PC send to the board.Note: The example echo every 8 characters, so input 8 characters every time.

The COP Example project is to demonstrate usage of the KSDK cop driver.In this example, after 10 times of refreshing, a timeout reset is generated.Please notice that because COP control registers are write-once only, so the COP_Init function and the COP_Disable function can be called only once after reset.In SystemInit() function which is called in startup code, there is an operation to disable the watchdog if macro DISABLE_WDOG is defined as 0, and by default if the DISABLE_WDOG is not defined, the DISABLE_WDOG is defined as 1. So this example has a special project setting that defines the DISABLE_WDOG macro to 0 so the startup code will skip the disable COP WDOG operation.

The DAC / ADC demo application demonstrates the use of the DAC and ADC peripherals. This application demonstrates how toconfigure the DAC and set the output on the DAC. This demo also demonstrates how to configure the ADC in 'Blocking Mode'and how to read ADC values.

The dac_basic example shows how to use DAC module simply as the general DAC converter.When the DAC's buffer feature is not enabled, the first item of the buffer is used as the DAC output data register.The converter would always output the value of the first item. In this example, it gets the value from terminal,outputs the DAC output voltage through DAC output pin.

The dac_buffer_interrupt example shows how to use DAC buffer with interrupts.When the DAC's buffer feature is enabled, user can benefit from the automation of updating DAC output by hardware/software trigger. As we know, the DAC converter outputs the value of item pointed by current read pointer. Once the buffer is triggered by software or hardware, the buffer's read pointer would move automatically as the work mode is set,like normal (cycle) mode, swing mode, one-time-scan mode or FIFO mode.In this example, it captures the user's type-in operation from terminal and does the software trigger to the buffer.The terminal would also display the log that shows the current buffer pointer's position with buffer events.

The demo shows how to use the PIT to generate a DAC trigger and use the DMA to transfer data into DAC buffer.In this example, DAC is first set to normal buffer mode. PIT is as DAC hardware trigger source and DMA would work when DAC read pointer is zero. When run the example, the DAC is triggered by PIT and the read pointer increases by one,every time the trigger occurs. When the read pointer reaches the upper limit, it goes to zero directly in the next trigger event.While read pointer goes to zero, DMA request will be triggered and transfer data into DAC buffer. The user should probethe DAC output with a oscilloscope to see the Half-sine signal.

The DMA memory to memory example is a simple demonstration program that uses the SDK software.It executes one shot transfer from source buffer to destination buffer using the SDK DMA drivers.The purpose of this example is to show how to use the DMA and to provide a simple example fordebugging and further development.

The flexio_i2c_interrupt example shows how to use flexio i2c master driver in interrupt way:In this example, a flexio simulated i2c master connect to an I2C slave.

This demo describes how to use SDK drivers to implement the PWM feature by FLEXIO IP module. It outputs the PWM singal with fixed frequency defined by "DEMO_FLEXIO_FREQUENCY" in source code and dynamic duty from 99 to 1 to one of the FLEXIO pin.

The flexio_spi_master_dma_spi_slave example shows how to use flexio spi master driver in dma way:In this example, a flexio simulated master connect to a spi slave .