自己创建了一个CCS工程，仿照SEED-DEC6713写的程序，可是一直出现如下的错误
"PLL.c", line 37: error: identifier "PLLM" is undefined
"PLL.c", line 38: error: identifier "PLLDIV0" is undefined
"PLL.c", line 39: error: identifier "OSCDIV1" is undefined
"PLL.c", line 42: error: identifier "PLLDIV1" is undefined
"PLL.c", line 46: error: identifier "PLLDIV2" is undefined
不知道什么原因
请各位大神给予解答，不剩感激