hc32f460: Add support for hc32f460 micro-controllers

Signed-off-by: Steven Gotthardt <gotthardt@gmail.com>

1 files changed, 29 insertions, 0 deletions

diff --git a/src/hc32f460/interrupts.c b/src/hc32f460/interrupts.c
new file mode 100644
index 00000000..fb93648f
--- /dev/null
+++ b/src/hc32f460/interrupts.c
@@ -0,0 +1,29 @@
+// Interrupt support for HC32F460
+// The library interrupt support is huge and redefines systick
+//
+// Copyright (C) 2022  Steven Gotthardt <gotthardt@gmail.com>
+//
+// This file may be distributed under the terms of the GNU GPLv3 license.
+
+#include "hc32f460.h"
+
+#define IRQ_PRIORITY_DEFAULT 15u
+
+/* the interrupts on the hc32f460 can be 're-assigned'
+    The author can choose the irqType (IRQ000_Handler, etc...)
+     that the source (irqSrc) triggers
+     */
+
+void IrqRegistration(en_int_src_t irqSrc, IRQn_Type irqType)
+{
+    stc_intc_sel_field_t *stcIntSel = (stc_intc_sel_field_t *)
+        ((uint32_t)(&M4_INTC->SEL0) + (4u * irqType));
+
+    // what is the source of the selected interrupt? (USART, etc...)
+    stcIntSel->INTSEL = irqSrc;
+
+    // set priority and enable
+    NVIC_SetPriority(irqType, IRQ_PRIORITY_DEFAULT);
+    NVIC_ClearPendingIRQ(irqType);
+    NVIC_EnableIRQ(irqType);
+}