Although these functions are more suited to applications where devices or systems may be communicating serially with each other, they are demonstrated using strings and characters in this example. The application demonstrates some of the UART transmit and receive functions available in the USART - Serial interface service module. Ioport_disable_port(IOPORT_PIOA, PIO_PA9A_URXD0 | PIO_PA10A_UTXD0) Ioport_set_port_mode(IOPORT_PIOA, PIO_PA9A_URXD0 | PIO_PA10A_UTXD0, IOPORT_MODE_MUX_A) Ioport_init() // call before using IOPORT service WDT->WDT_MR = WDT_MR_WDDIS // disable watchdog These two UART pins are then disabled as I/O pins by calling ioport_disable_port() which dedicates them to the UART. Pins PA9 and PA10 are set to use internal peripheral A which is UART0 by calling ioport_set_port_mode(). #define CONF_UART_STOP_BITS US_MR_NBSTOP_1_BIT #define CONF_UART_CHAR_LENGTH US_MR_CHRL_8_BIT #define CONF_UART_PARITY UART_MR_PAR_NO Be sure to set the UART name (CONF_UART) to point to the correct UART for the board.

Uncomment the USART settings in this file and change them to the desired values. The conf_uart_serial.h file is added to the project when the USART Serial interface service module is added to the project.

#define BOARD_FREQ_MAINCK_BYPASS (12000000U) UART0 is defined as the console UART as it is connected to the EDBG virtual COM port on the SAM4N Xplained Pro board. ASF Modules used in the UART Project Hardware Definitions and Configuration (conf_board.h and conf_uart_serial.h) Also add the IOPORT module which is needed to configure the UART or USART pins.

The ASF module that adds the UART and USART functionality to the project is the USART - Serial interface (service) module. It isn't the core flow of a full app that takes the time, it is all the checking, trapping, and reporting to make it robust.Books that may interest you: Creating the ASF USART Serial Interface ProjectĬreate a new ASF project called uart in Atmel Studio as explained in the new ASF project quick start checklist. Yep, he did finish it quickly and it worked-until anything exceptional happened. Yep, I've run into this before when I estimated xyz effort for a project, and a co-worker said that he could do it in 1/10 the time and was given the project. So care is taken to make them 'good', if not 'near best'. That comes up quite often in Compiler Wars-if the compiler vendor had a slower/bloated intrinsic and/or library routine then the marketplace would vote with thier feet. Since this is a sharing community I'm sure we would all very much appreciate seeing your library so that we can replace the existing crappy libraries that are 'always too big'. Those functions in library always too big.

Atmega128 software uart