Shulou(Shulou.com)06/01 Report--

This article introduces the relevant knowledge of "how to set the clock in C language". In the operation of practical cases, many people will encounter such a dilemma. Then let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

# define APLL_LOCK (* (volatile unsigned long *) 0x7E00F000) # define MPLL_LOCK (* ((volatile unsigned long *) 0x7E00F004)) # define EPLL_LOCK (* ((volatile unsigned long *) 0x7E00F008)) # define OTHERS (* ((volatile unsigned long *) 0x7e00f900)) # define CLK_DIV0 (* ((volatile unsigned long *) 0x7E00F020)) # define ARM_RATIO 0 / * ARMCLK = DOUTAPLL / (ARM_RATIO + 1) * / # define HCLKX2_RATIO 4 / * HCLKX2 = HCLKX2IN / (HCLKX2_RATIO + 1) = 100MHz * / # define HCLK_RATIO 0 / * HCLK = HCLKX2 / (HCLK_RATIO + 1) = 100MHz * / # define PCLK_RATIO 1 / * PCLK = HCLKX2 / (PCLK_RATIO + 1) = 50MHz * / # define MPLL_RATIO 0 / * DOUTMPLL = MOUTMPLL / (MPLL_RATIO + 1) * / # define APLL_CON (* (volatile unsigned long *) 0x7E00F00C)) # define APLL_CON_VAL ((1)

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