ARM 各频率计算方法

nPLLVALUE = s2450CLK->MPLLCON ; nCLKDIV = s2450CLK->CLKDIV0 ; nM_DIV = ((nPLLVALUE >> 14) & 0x3ff); nP_DIV =((nPLLVALUE >> 5) & 0x3F); nS_DIV =((nPLLVALUE >> 0) & 0x7); nARMDIVN=((nCLKDIV >> 9) & 0xf)

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