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.. | ||
armgcc | ||
board.c | ||
board.h | ||
clock_config.c | ||
clock_config.h | ||
dcd.c | ||
dcd.h | ||
evkmimxrt1020_sdram_init.jlinkscript | ||
lpuart_9bit_interrupt_transfer_v3_14.xml | ||
lpuart_9bit_interrupt_transfer.c | ||
pin_mux.c | ||
pin_mux.h | ||
readme.md |
Overview
The lpuart_9bit_interrupt_transfer example shows how to use lpuart driver in 9-bit mode in multi-slave system. Master can send data to slave with certain address specifically, and slave can only receive data when it is addressed.
In this example, one lpuart instance is used with address configured. Its TX and RX pins are connected together. First it sends a piece of data out, then addresses itself, after that sends the other piece of data. Only data sent after the address can be received by itself.
SDK version
- Version: 2.15.000
Toolchain supported
- IAR embedded Workbench 9.40.1
- Keil MDK 5.38.1
- GCC ARM Embedded 12.2
- MCUXpresso 11.8.0
Hardware requirements
- Mini/micro USB cable
- EVK-MIMXRT1020 board
- Personal Computer
Board settings
LPUART3 CONNECTS TO LPUART3
Pin Name Bard Location Pin Name Bard Location
TXD J17-7 RXD J19-2
Prepare the Demo
- Connect a USB cable between the host PC and the OpenSDA USB port on the target board.
- Open a serial terminal with the following settings:
- 115200 baud rate
- 8 data bits
- No parity
- One stop bit
- No flow control
- Download the program to the target board.
- Either press the reset button on your board or launch the debugger in your IDE to begin running the demo.
Running the demo
When the demo runs successfully, the log would be seen on the OpenSDA terminal like:
UART 9-bit mode example begins
UART is configured with address, only data sent to itself after matched address can be received
UART will send first piece of data out:
0x 0 0x 1 0x 2 0x 3 0x 4 0x 5 0x 6 0x 7
0x 8 0x 9 0x a 0x b 0x c 0x d 0x e 0x f
UART will address itself
UART will send the other piece of data out:
0x10 0x11 0x12 0x13 0x14 0x15 0x16 0x17
0x18 0x19 0x1a 0x1b 0x1c 0x1d 0x1e 0x1f
UART received data:
0x10 0x11 0x12 0x13 0x14 0x15 0x16 0x17
0x18 0x19 0x1a 0x1b 0x1c 0x1d 0x1e 0x1f
All data matches!