1 //==========================================================================
5 // HAL platform miscellaneous functions
7 //==========================================================================
8 //####ECOSGPLCOPYRIGHTBEGIN####
9 // -------------------------------------------
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38 // -------------------------------------------
39 //####ECOSGPLCOPYRIGHTEND####
40 //==========================================================================
41 //#####DESCRIPTIONBEGIN####
44 // Contributors: ysato
46 // Purpose: HAL miscellaneous functions
47 // Description: This file contains miscellaneous functions provided by the
50 //####DESCRIPTIONEND####
52 //========================================================================*/
54 #include <pkgconf/hal.h>
56 #include <cyg/infra/cyg_type.h> // Base types
58 #include <cyg/hal/hal_arch.h> // architectural definitions
59 #include <cyg/hal/hal_io.h>
60 #include <cyg/hal/hal_if.h>
61 #include <cyg/hal/plf_intr.h>
62 #include <cyg/hal/var_arch.h>
64 /*------------------------------------------------------------------------*/
66 void hal_platform_init(void)
71 void h8300h_reset(void)
73 __asm__ ("ldc #0x80,ccr\n"
77 /*------------------------------------------------------------------------*/
78 /* Control C ISR support */
80 #if defined(CYGDBG_HAL_DEBUG_GDB_CTRLC_SUPPORT)
82 struct Hal_SavedRegisters *hal_saved_interrupt_state;
86 /*------------------------------------------------------------------------*/
89 void hal_clock_initialize(cyg_uint32 period)
92 #if CYGNUM_HAL_H8300_RTC_PRESCALE == 8
95 #if CYGNUM_HAL_H8300_RTC_PRESCALE == 64
98 #if CYGNUM_HAL_H8300_RTC_PRESCALE == 8192
101 #error illigal RTC prescale setting
105 HAL_WRITE_UINT8(CYGARC_TCORA3,period);
106 HAL_WRITE_UINT8(CYGARC_8TCNT3,0x00);
107 HAL_WRITE_UINT8(CYGARC_8TCR3,0x48 | prescale);
108 HAL_WRITE_UINT8(CYGARC_8TCSR3,0x00);
111 void hal_clock_reset(cyg_uint32 vector, cyg_uint32 period)
113 HAL_WRITE_UINT8(CYGARC_8TCR3,0x00);
114 HAL_WRITE_UINT8(CYGARC_8TCSR3,0x00);
115 hal_clock_initialize(period);
118 void hal_clock_read(cyg_uint32 *pvalue)
121 HAL_READ_UINT8(CYGARC_8TCNT3,val);
125 //---------------------------------------------------------------------------
126 // Low-level delay (in microseconds)
129 void hal_delay_us(int usecs)
131 volatile CYG_BYTE *tcr = (CYG_BYTE *)CYGARC_8TCR2;
132 volatile CYG_BYTE *tcnt = (CYG_BYTE *)CYGARC_8TCNT2;
133 short clocks_per_us = (CYGHWR_HAL_H8300_PROCESSOR_SPEED/1000000)/8*25;
134 //short clocks_per_us = (CYGHWR_HAL_H8300_PROCESSOR_SPEED/1000000)/20;
135 unsigned char val1,val2;
145 while (diff < clocks_per_us) {
147 while ((val2 = *tcnt) == val1);
149 diff += val2 + 0x100 - val1;
153 usecs -= diff / clocks_per_us;
154 diff -= clocks_per_us;
160 /*------------------------------------------------------------------------*/
161 /* End of plf_misc.c */