STM32F103RCT6 256k flash 需要選擇STM32F10X High-desity Flash
這樣在使用定時器5的時候
//中斷優先級NVIC設置
NVIC_InitStructure.NVIC_IRQChannel = TIM5_IRQn; //TIM5中斷
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; //優占優先級0級
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2; //從優先級3級
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ通道被使能
NVIC_Init(&NVIC_InitStructure); //初始化NVIC寄存器
TIM_Cmd(TIMER, ENABLE); //使能TIMx
TIM5_IRQn 就不會報錯