KEIL调试成功之后移植到IAR上，出现一些未定义的错误，但是通过go to defination可以调到变量定义区。
Building configuration: CAN - Debug 
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CAN.c  
Error[Pe020]: identifier "GPIO_InitTypeDef" is undefined C:UsersAdministratorDesktopCANUsersCANCAN.c 21 
Warning[Pe223]: function "RCC_APB2PeriphClockCmd" declared implicitly C:UsersAdministratorDesktopCANUsersCANCAN.c 27 
Error[Pe020]: identifier "RCC_APB2Periph_GPIOB" is undefined C:UsersAdministratorDesktopCANUsersCANCAN.c 27 
Error[Pe020]: identifier "RCC_APB2Periph_AFIO" is undefined C:UsersAdministratorDesktopCANUsersCANCAN.c 27 
Warning[Pe223]: function "RCC_APB1PeriphClockCmd" declared implicitly C:UsersAdministratorDesktopCANUsersCANCAN.c 28 
Error[Pe020]: identifier "RCC_APB1Periph_CAN1" is undefined C:UsersAdministratorDesktopCANUsersCANCAN.c 28 
Error[Pe020]: identifier "GPIO_Pin_8" is undefined C:UsersAdministratorDesktopCANUsersCANCAN.c 32 
Error[Pe020]: identifier "GPIO_Mode_IPU" is undefined C:UsersAdministratorDesktopCANUsersCANCAN.c 33 
Error[Pe020]: identifier "GPIO_Speed_50MHz" is undefined C:UsersAdministratorDesktopCANUsersCANCAN.c 34 
Warning[Pe223]: function "GPIO_Init" declared implicitly C:UsersAdministratorDesktopCANUsersCANCAN.c 35 
Error[Pe020]: identifier "GPIO_Pin_9" is undefined C:UsersAdministratorDesktopCANUsersCANCAN.c 37 
Error[Pe020]: identifier "GPIO_Mode_AF_PP" is undefined C:UsersAdministratorDesktopCANUsersCANCAN.c 38 
Warning[Pe223]: function "GPIO_PinRemapConfig" declared implicitly C:UsersAdministratorDesktopCANUsersCANCAN.c 42 
Error[Pe020]: identifier "GPIO_Remap1_CAN1" is undefined C:UsersAdministratorDesktopCANUsersCANCAN.c 42 
Error[Pe020]: identifier "CAN1_RX0_IRQn" is undefined C:UsersAdministratorDesktopCANUsersCANCAN.c 45 
Error[Pe020]: identifier "GPIO_InitTypeDef" is undefined C:UsersAdministratorDesktopCANUsersCANCAN.c 93 
Warning[Pe223]: function "RCC_APB2PeriphClockCmd" declared implicitly C:UsersAdministratorDesktopCANUsersCANCAN.c 99 
Error[Pe020]: identifier "RCC_APB2Periph_GPIOB" is undefined C:UsersAdministratorDesktopCANUsersCANCAN.c 99 
Error[Pe020]: identifier "RCC_APB2Periph_AFIO" is undefined C:UsersAdministratorDesktopCANUsersCANCAN.c 99 
Warning[Pe223]: function "RCC_APB1PeriphClockCmd" declared implicitly C:UsersAdministratorDesktopCANUsersCANCAN.c 100 
Error[Pe020]: identifier "RCC_APB1Periph_CAN2" is undefined C:UsersAdministratorDesktopCANUsersCANCAN.c 100 
Error[Pe020]: identifier "GPIO_Pin_12" is undefined C:UsersAdministratorDesktopCANUsersCANCAN.c 103 
Error[Pe020]: identifier "GPIO_Mode_IPU" is undefined C:UsersAdministratorDesktopCANUsersCANCAN.c 104 
Error[Pe020]: identifier "GPIO_Speed_50MHz" is undefined C:UsersAdministratorDesktopCANUsersCANCAN.c 105 
Warning[Pe223]: function "GPIO_Init" declared implicitly C:UsersAdministratorDesktopCANUsersCANCAN.c 106 
Error[Pe020]: identifier "GPIO_Pin_13" is undefined C:UsersAdministratorDesktopCANUsersCANCAN.c 108 
Error[Pe020]: identifier "GPIO_Mode_AF_PP" is undefined C:UsersAdministratorDesktopCANUsersCANCAN.c 109 
Error[Pe020]: identifier "CAN2_RX1_IRQn" is undefined C:UsersAdministratorDesktopCANUsersCANCAN.c 114 
Error while running C/C++ Compiler 
 
Total number of errors: 21 
Total number of warnings: 7