UART_busywait

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This is a C language project demonstrates universal asynchronous receiver transmiter (UART) serial input/output using UART0. The project uses busy-wait synchronization. UART0 is attached to the PC using the USB cable, creating a virtual serial port on the PC. main1 tests UART character input/output. main demonstrates printf. Sorry, scanf does not work. It input data from the terminal you can use functions like UART_InChar, UART_InString, UART_InUDec, and UART_InUHex. When running this project, the USB cable must be attached to the PC and a terminal program (Putty or CCS terminal) must be opened with a baud rate of 115200 bits/sec.
 
Derived from Texas Instrument code

  • uart_rw_multibyte_fifo_poll_LP_MSPM0G3507_nortos_ticlang
  • gpio_toggle_output_LP_MSPM0G3507_nortos_ticlang

Hardware Required

  • MSPM0G3507 LaunchPad™ Development Kit (LP-MSPM0G3507)

Pin assignments
  • Serial TxD: PA10 is UART0 Tx (MSPM0 to PC) index 20 in IOMUX PINCM table
  • Serial RxD: PA11 is UART0 Rx (PC to MSPM0) index 21 in IOMUX PINCM table
  • Output: PA0 is red LED1, index 0 in IOMUX PINCM table
LaunchPad Jumpers
  • Remove J16 J17 J18: Disconnects light sensor from the microcontroller PA22 PA27 PA26
  • J4: Connects PA0 to red LED
  • J21: Connects PA10 to XDS_UART
  • J22: Connects PA11 to XDS_UART

Simplified BSD License (FreeBSD License) Copyright © 2025, Jonathan Valvano, All rights reserved.
 
Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

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