board/xplain/init.c

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#include <board.h>
#include <gpio.h>
#ifdef __ICCAVR__
#include <pmic.h>
#endif

#ifdef CONFIG_TOUCH_RESISTIVE
# include <board/touch/resistive/touch.h>
#endif
#ifdef CONFIG_EXTRAM_SDRAM
# include <board/sdram.h>
#endif

void board_init(void)
{
        /* Set LED pins to be outputs, and all off. */
        port_select_gpio((void *)PORTE_BASE, 0xff, PORT_DIR_OUTPUT
                        | PORT_INIT_HIGH);
        /* If USARTD0 is used for UART communication set PORTD tx pin as output */
#ifdef CONFIG_XPLAIN_UARTD0
        port_select_gpio_pin(27, PORT_DIR_OUTPUT | PORT_INIT_HIGH);
#endif
        /* If USARTD1 is used for UART communication set PORTD tx pin as output */
#ifdef CONFIG_XPLAIN_UARTD1
        port_select_gpio_pin(31, PORT_DIR_OUTPUT | PORT_INIT_HIGH);
#endif
        /* Set UART0 TX pin (PC3) as output */
        port_select_gpio_pin(19, PORT_DIR_OUTPUT | PORT_INIT_HIGH);

        /* Init SPI master IO on port C
         * Outputs: SCK on pin 7 and MOSI on pin 5
         * Inputs: MISO on pin 6 (Leave unchanged)
         */
        port_select_gpio_pin(21, PORT_DIR_OUTPUT);
        port_select_gpio_pin(23, PORT_DIR_OUTPUT);

        /* Set button pins on port F to be inputs with pull-up and interrupt
         * sensing on both edges.
         */
        port_select_gpio((void *)PORTF_BASE, 0xFF,
                        PORT_DIR_INPUT | PORT_BOTHEDGES | PORT_PULL_UP);

        /* If resistive touch is configured, unset the PR bit for ADC A */
#ifdef CONFIG_TOUCH_RESISTIVE
        board_enable_touch_adc();
#endif

        /*
         * IAR does not enable low, medium and high interrupts on startup in
         * PMIC, so they must be enabled "manually".
         *
         * \todo rewrite this into a constructor for main.
         */
#ifdef __ICCAVR__
        pmic_enable_low_lvl_int();
        pmic_enable_medium_lvl_int();
        pmic_enable_high_lvl_int();
#endif

        /* If huge memory is enabled, enable the onboard SDRAM. */
#ifdef CONFIG_EXTRAM_SDRAM
        // Configure I/O ports used by the EBI, except data lines.
        port_write_reg(PORTH_BASE, OUT, 0x0f);
        port_write_reg(PORTH_BASE, DIR, 0xff);
        port_write_reg(PORTK_BASE, DIR, 0xff);
        port_write_reg(PORTJ_BASE, DIR, 0xf0);

        board_enable_sdram();
#endif
}

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