chip/at90usb1287/include/chip/sysclk.h

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#ifndef CHIP_SYSCLK_H_INCLUDED
#define CHIP_SYSCLK_H_INCLUDED

#include <chip/regs.h>



#define SYSCLK_ADC              0x0001  //!< A/D Converter
#define SYSCLK_SPI              0x0004  //!< SPI controller
#define SYSCLK_TC1              0x0008  //!< Timer/Counter 1
#define SYSCLK_TC0              0x0020  //!< Timer/Counter 0
#define SYSCLK_TC2              0x0040  //!< Timer/Counter 2
#define SYSCLK_TWI              0x0080  //!< TWI controller
#define SYSCLK_USART1           0x0101  //!< USART 1

#define SYSCLK_USART0           SYSCLK_USART1
#define SYSCLK_TC3              0x0108  //!< Timer/counter 3
#define SYSCLK_USB              0x0180  //!< USB controller


#ifndef __ASSEMBLY__

#include <assert.h>
#include <interrupt.h>
#include <stdint.h>



static inline void sysclk_enable_module(uint16_t id)
{
        irqflags_t iflags;
        uint8_t reg_offset;
        uint8_t mask;

        assert(id <= SYSCLK_USB);

        reg_offset = id >> 8;

        iflags = cpu_irq_save();
        mask = avr_read_reg8(PRR0 + reg_offset);
        mask &= ~(id & 0xff);
        avr_write_reg8(PRR0 + reg_offset, mask);
        cpu_irq_restore(iflags);
}

static inline void sysclk_disable_module(uint16_t id)
{
        irqflags_t iflags;
        uint8_t reg_offset;
        uint8_t mask;

        assert(id <= SYSCLK_USB);

        reg_offset = id >> 8;

        iflags = cpu_irq_save();
        mask = avr_read_reg8(PRR0 + reg_offset);
        mask |= (id & 0xff);
        avr_write_reg8(PRR0 + reg_offset, mask);
        cpu_irq_restore(iflags);
}


static inline void sysclk_init(void)
{
        avr_write_reg8(PRR0, 0xed);
        avr_write_reg8(PRR1, 0x89);
}

#endif /* !__ASSEMBLY__ */


#endif /* CHIP_SYSCLK_H_INCLUDED */

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