From 576171f7323ed1871353e2de284e0a539db9f8c8 Mon Sep 17 00:00:00 2001
From: Imbus <>
Date: Wed, 16 Jul 2025 15:36:49 +0200
Subject: [PATCH] system (systick related)

---
 system.c | 35 +++++++++++++++++++++++++++++++++++
 system.h |  6 ++++++
 2 files changed, 41 insertions(+)
 create mode 100644 system.c
 create mode 100644 system.h

diff --git a/system.c b/system.c
new file mode 100644
index 0000000..656b1a3
--- /dev/null
+++ b/system.c
@@ -0,0 +1,35 @@
+#include "system.h"
+#include <libopencm3/cm3/systick.h>
+#include <stdint.h>
+
+volatile uint64_t ticks = 0;
+
+void sys_tick_handler(void) { ticks++; }
+
+uint64_t get_ticks(void) { return ticks; }
+
+void systick_setup(void) {
+    // systick_set_frequency(1000, 72000000);
+    systick_set_clocksource(STK_CSR_CLKSOURCE_AHB);
+    systick_set_reload(72000000 / 1000 - 1); // 1ms tick
+    systick_clear();
+    systick_interrupt_enable();
+    systick_counter_enable();
+}
+
+void sys_tick_setup(void) {
+    ticks = 0;
+    // rcc_clock_setup_pll(&rcc_hse_configs[RCC_CLOCK_HSE16_72MHZ]);
+
+    // systick_set_clocksource(STK_CSR_CLKSOURCE_AHB_DIV8);
+    systick_set_clocksource(STK_CSR_CLKSOURCE_AHB);
+
+    // systick_set_reload(8999);
+    systick_set_frequency(1000, 72000000);
+    systick_clear();
+
+    systick_interrupt_enable();
+    systick_counter_enable();
+
+    return;
+}
diff --git a/system.h b/system.h
new file mode 100644
index 0000000..942ec89
--- /dev/null
+++ b/system.h
@@ -0,0 +1,6 @@
+#pragma once
+#include <stdint.h>
+
+void sys_tick_handler(void);
+uint64_t get_ticks(void);
+void systick_setup(void);