95 lines
1.6 KiB
C
95 lines
1.6 KiB
C
//---
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//
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// gint core module: clock
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//
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// Measures the frequency of the MPU clocks. This module assumes that the
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// clock mode is 3 on SH7305 (as does FTune).
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//
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//---
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#ifndef _CLOCK_H
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#define _CLOCK_H
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//---
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// Sleep functions.
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//---
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/*
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sleep()
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Puts the processor to sleep until an interrupt request is issued.
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*/
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void sleep(void);
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/*
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sleep_ms(), sleep_us()
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Sleeps for the given number of milliseconds / microseconds using the
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TIMER_USER timer. The actual sleep time will always be slightly less
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than requested.
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*/
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void sleep_ms(int ms_delay);
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void sleep_us(int us_delay);
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//---
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// Clock management.
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//---
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enum ClockUnit
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{
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Clock_us = 0,
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Clock_ms = 1,
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Clock_s = 2,
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Clock_Hz = 10,
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Clock_kHz = 11,
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Clock_MHz = 12,
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};
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typedef struct
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{
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union
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{
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int PLL1; // SH7705
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int FLL; // SH7305
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};
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union
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{
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int PLL2; // SH7705
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int PLL; // SH7305
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};
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int Bphi_div1;
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int Iphi_div1;
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int Pphi_div1;
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union
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{
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int CKIO_f; // SH7705
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int RTCCLK_f; // SH7305
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};
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int Bphi_f;
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int Iphi_f;
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int Pphi_f;
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} clock_config_t;
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/*
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clock_setting()
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Returns the P_phi / 4 timer setting that will last for the given time.
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Several units can be used. Be aware that the result is approximate, and
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very high frequencies or very short delays will yield important errors.
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Normally you need not use this function when setting up timers because
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timer_start() handles this conversion for you.
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*/
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int clock_setting(int duration, enum ClockUnit unit);
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/*
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clock_config()
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Returns a copy of what the library knows about the clocks.
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*/
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clock_config_t clock_config(void);
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#endif // _CLOCK_H
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