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import "ch573/common.fdl";
/** Package for SYSTICK (system counter). */
package ch573.systick {
location systick_base = 0xE000F000;
using ch573.common;
type systick_t : struct {
reg cfg(32) @0x0 : struct {
/** Enable the systick. */
rw enabled : enable_t;
/** Enable the systick interrupt. */
rw interrupt_enable : enable_t;
/** Clock source for the systick. */
rw clock_source : enum(1) {
[[ c: unqualified ]]
SYSTICK_CLOCK_SOURCE_HCLK = 1,
[[ c: unqualified ]]
SYSTICK_CLOCK_SOURCE_HCLK_DIV_8 = 0,
};
reserved(5);
/** Write 1 to reload the systick. */
wo st_reload : (1);
reserved(23);
};
assert_pos(0x4);
union {
struct {
/** Lower 32 bits of the systick count. */
reg count_low(32);
assert_pos(0x8);
/** Upper 32 bits of the systick count. */
reg count_high(32);
};
/** Full 64 bits of the systick count. */
reg count(64);
};
assert_pos(0xC);
union {
struct {
/** Lower 32 bits of the systick reload value. */
reg reload_low(32);
assert_pos(0x10);
/** Upper 32 bits of the systick reload value. */
reg reload_high(32);
};
/** Full 64-bit systick reload value. */
reg reload(64);
};
reg (32) @0x14 : struct {
/** Software interrupt happened. (Set to 1 to trigger a software
* interrupt.) */
software_interrupt_flag : (1);
/** Counter interrupt happened. */
counter_interrupt_flag : (1);
reserved(30);
};
};
instance systick at systick_base : systick_t;
};
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