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21 lines
823 B
C
21 lines
823 B
C
// Copyright (c) 2023 Cesanta Software Limited
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// All rights reserved
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//
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// This file contains essentials required by the CMSIS:
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// uint32_t SystemCoreClock - holds the system core clock value
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// SystemInit() - initialises the system, e.g. sets up clocks
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//
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// Vendor CMSIS usually contain system_XXXX.c file with SystemInit()
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// We don't use it - instead, we provide our own SystemInit().
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#include "hal.h"
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uint32_t SystemCoreClock; // Holds system core clock in Hz. Required by CMSIS
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void SystemInit(void) { // Called automatically by startup code
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clock_init(); // Core clock to 480 MHz
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rng_init(); // Initialise random number generator
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SystemCoreClock = CPU_FREQUENCY; // defined in hal.h
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SysTick_Config(SystemCoreClock / 1000); // Sys tick every 1ms
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}
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