Shared SAM API for USART_SPI Master Mode / Example for SAM4S_EK Documentation

Introduction

This example demonstrates how to use the USART_SPI Master Mode Basic Services.

Main Files

• usart_spi_master_example.c: port drivers example application.
• conf_board.h: board initialization process configuration
• conf_usart_spi_master_example.h: board-specific mapping of resources used by this example
• usart_spi.c: Part Specific USART_SPI Master Mode Implementation

API

The usart_spi API can be found here.

Device Info

This example can be used on all SAM EK boards with external AT45DBX data flash component. Connect the board and external component with the following paired pins.

• SAM4S-EK – AT45DBX component
  • 3V3 – VCC
  • RTS(PA24) – NCS
  • SCK(PA23) – CLK
  • RXD(PA21) – MISO
  • TXD(PA22) – MOSI
  • GND – GND

Description of the example

• Send "Manufacturer ID Read" command to the dataflash.
• Read back the Manufacturer ID of the dataflash.
• If Manufacturer ID match Atmel ID "0x1F" and there are at least 2 LEDs on the board, both USART_SPI_EXAMPLE_LED_PIN_EXAMPLE_1 and USART_SPI_EXAMPLE_LED_PIN_EXAMPLE_2 are 'on'. Otherwise USART_SPI_EXAMPLE_LED_PIN_EXAMPLE_1 is 'on' and USART_SPI_EXAMPLE_LED_PIN_EXAMPLE_2 is 'off'. If there is only one LED on the board, USART_SPI_EXAMPLE_LED_PIN_EXAMPLE_1 is 'on'. Otherwise USART_SPI_EXAMPLE_LED_PIN_EXAMPLE_1 is 'off'.

Compilation Info

This software was written for the GNU GCC and IAR. Other compilers may or may not work.

Contact Information

For further information, visit Microchip.