用ASF跑SAMD21程序(30) SPILED

#include <asf.h>



int main(void)

{

        //! the page address to write to

        uint8_t page_address;

        //! the column address, or the X pixel.

        uint8_t column_address;

        //! store the LCD controller start draw line

        uint8_t start_line_address = 0;



        system_init();

        delay_init();



        // Initialize SPI and SSD1306 controller

        ssd1306_init();



        // set addresses at beginning of display

        ssd1306_set_page_address(0);

        ssd1306_set_column_address(0);



        // fill display with lines

        for (page_address = 0; page_address <= 8; page_address++) {

                ssd1306_set_page_address(page_address);

                for (column_address = 0; column_address < 128; column_address++) {

                        ssd1306_set_column_address(column_address);

                        /* fill every other pixel in the display. This will produce

                        horizontal lines on the display. */

                        ssd1306_write_data(0x0f);

                }

        }



        // scroll the display using hardware support in the LCD controller

        while (true) {

                ssd1306_set_display_start_line_address(start_line_address++);

                delay_ms(250);

        }

}

#ifndef CONF_SSD1306_H_INCLUDED

#define CONF_SSD1306_H_INCLUDED



#include <board.h>



// Interface configuration for SAM D21 Xplained Pro

#  define SSD1306_SPI                 EXT3_SPI_MODULE

#  define CONFIG_SSD1306_FRAMEBUFFER



#  define SSD1306_DC_PIN              EXT3_PIN_5

#  define SSD1306_RES_PIN             EXT3_PIN_10

#  define SSD1306_CS_PIN              EXT3_PIN_15



#  define SSD1306_SPI_PINMUX_SETTING  EXT3_SPI_SERCOM_MUX_SETTING

#  define SSD1306_SPI_PINMUX_PAD0     EXT3_SPI_SERCOM_PINMUX_PAD0

#  define SSD1306_SPI_PINMUX_PAD1     PINMUX_UNUSED

#  define SSD1306_SPI_PINMUX_PAD2     EXT3_SPI_SERCOM_PINMUX_PAD2

#  define SSD1306_SPI_PINMUX_PAD3     EXT3_SPI_SERCOM_PINMUX_PAD3



// Minimum clock period is 50ns[url=home.php?mod=space&uid=517595]@3.3V[/url] -> max frequency is 20MHz

#define SSD1306_CLOCK_SPEED           1000000UL

#define SSD1306_DISPLAY_CONTRAST_MAX  40

#define SSD1306_DISPLAY_CONTRAST_MIN  30



#endif /* CONF_SSD1306_H_INCLUDED */