52 lines
1.6 KiB
Plaintext
52 lines
1.6 KiB
Plaintext
Overview
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========
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The syscon_clockout driver example shows how to output the internal clock signal. In this driver example, users can
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choose the clock signal to be outputted, and the divider of the output clock signal. By probing the output pin, users
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can observe the selected internal clock signal.
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Toolchain supported
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===================
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- IAR embedded Workbench 9.20.2
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- Keil MDK 5.36
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- GCC ARM Embedded 10.3.1
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- MCUXpresso 11.5.0
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Hardware requirements
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=====================
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- Mini/micro USB cable
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- LPCXpresso55S69 board
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- Personal Computer
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Board settings
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==============
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No special settings are required.
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Prepare the Demo
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================
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1. Connect a micro USB cable between the PC host and the CMSIS DAP USB port (P6) on the board
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2. Open a serial terminal with the following settings (See Appendix A in Getting started guide for description how to determine serial port number):
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- 115200 baud rate
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- 8 data bits
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- No parity
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- One stop bit
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- No flow control
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3. Download the program to the target board.
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4. Either press the reset button on your board or launch the debugger in your IDE to begin running the demo.
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Running the demo
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================
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The log below shows the output of the clockout demo in the terminal window:
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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Clock Output Driver Example.
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Please choose one output clock.
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A -- Main Clock.
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B -- PLL0 Clock.
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C -- CLKIN Clock.
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D -- FRO 96 MHz Clock.
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E -- FRO 1 MHz Clock.
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F -- PLLQ Clock.
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G -- Oscillator 32 kHz Clock.
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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To measure the output clock signal, please use the oscilloscope to probe P17_13(P23_6).
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