board/xplain/include/board/touch/resistive/touch.h

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#ifndef BOARD_TOUCH_H
#define BOARD_TOUCH_H

#include <pmic.h>
#include <clk/sys.h>
#include <regs/xmega_adc.h>
#include <regs/xmega_pr.h>

__always_inline static void board_enable_touch_adc(void)
{
        sysclk_enable_module(SYSCLK_PORT_A, SYSCLK_ADC);
}


__always_inline static void board_disable_touch_adc(void)
{
        uint8_t temp;

        // Disable unnecessary references, leave selection.
        temp = adc_read_reg(CONFIG_TOUCH_ADC_BASE, REFCTRL);
        temp &= ADC_BFMASK(REFSEL);
        adc_write_reg(CONFIG_TOUCH_ADC_BASE, REFCTRL, temp);

        // Disable the ADC itself.
        temp = adc_read_reg(CONFIG_TOUCH_ADC_BASE, CTRLA);
        temp &= ~ADC_BIT(ENABLE);
        adc_write_reg(CONFIG_TOUCH_ADC_BASE, CTRLA, temp);

        // Finally, set the ADC's PR bit.
        sysclk_disable_module(SYSCLK_PORT_A, SYSCLK_ADC);
}


#endif /* BOARD_TOUCH_H */

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