init:初始框架

2026-06-06 20:50:54 +08:00
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+/*
+ * Copyright (c) 2020, Texas Instruments Incorporated
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * *  Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *
+ * *  Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * *  Neither the name of Texas Instruments Incorporated nor the names of
+ *    its contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <stdint.h>
+
+#include <ti/driverlib/m0p/dl_interrupt.h>
+
+/* 32 Device Peripheral Exceptions + 16 reserved M0+ Exceptions */
+#define NUM_RES_M0_EXC ((uint32_t) 16)
+#define NUM_DEV_PERIPH_EXC ((uint32_t) 32)
+#define NUM_INTERRUPTS (NUM_RES_M0_EXC + NUM_DEV_PERIPH_EXC)
+
+#if defined(__IAR_SYSTEMS_ICC__)
+#pragma data_alignment = 256
+static __no_init void (*InterruptRAMVectors[NUM_INTERRUPTS])(void) @ "VTABLE";
+#else
+static __attribute__((section(".vtable"))) void (
+    *InterruptRAMVectors[NUM_INTERRUPTS])(void) __attribute__((aligned(256)));
+#endif
+void DL_Interrupt_registerInterrupt(
+    uint32_t exceptionNumber, void (*intHandler)(void))
+{
+    void (**baseAddress)(void);
+    uint32_t i;
+
+    /* See if the RAM vector table has been initialized */
+    if (SCB->VTOR != (uint32_t) InterruptRAMVectors) {
+        baseAddress = (void (**)(void)) SCB->VTOR;
+
+        /* Copy the vector table from Flash to RAM */
+        for (i = 0; i < NUM_INTERRUPTS; i++) {
+            InterruptRAMVectors[i] = baseAddress[i];
+        }
+
+        SCB->VTOR = (uint32_t) InterruptRAMVectors;
+    }
+
+    InterruptRAMVectors[exceptionNumber + NUM_RES_M0_EXC] = intHandler;
+}
+
+void DL_Interrupt_unregisterInterrupt(uint32_t exceptionNumber)
+{
+    InterruptRAMVectors[exceptionNumber + NUM_RES_M0_EXC] = Default_Handler;
+}