24 lines
573 B
C++
24 lines
573 B
C++
#include "CH32V00xxx.h"
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extern "C" void SystemInit ();
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enum CLKSRC : uint32_t {
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CLK_HSI = 0u,
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CLK_HSE,
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CLK_PLL,
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};
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void SystemInit(void) {
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RCC.CFGR0.R = 0u; // prescaler OFF
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RCC.CTLR.modify([](RCC_Type::CTLR_DEF & r) -> auto {
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r.B.HSITRIM = 0x10u;
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r.B.HSION = SET;
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r.B.HSEBYP = SET;
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r.B.CSSON = SET;
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r.B.PLLON = SET;
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return r.R;
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});
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FLASH.ACTLR.B.LATENCY = SET;
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RCC.INTR.R = 0x009F0000u; // clear interrupts
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while (RCC.CTLR.B.PLLRDY == RESET);
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RCC.CFGR0.B.SW = CLK_PLL;
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while (RCC.CFGR0.B.SWS != CLK_PLL);
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}
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