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标题: STM32文档中关于NVIC寄存器说明的位置 [打印本页]

作者: yuchengze 时间: 2017-6-24 18:14 标题: STM32文档中关于NVIC寄存器说明的位置

要使用STM32，需要各种文档，其中有（以STM32F103RBT6为例）：
st官方资源地址：http://www.st.com/internet/mcu/product/164487.jsp
1、datasheet：http://www.st.com/internet/com/T ... HEET/CD00161566.pdf
2、REFERENCE MANUALS：http://www.st.com/internet/com/T ... NUAL/CD00171190.pdf
3、ERRATA SHEETS：http://www.st.com/internet/com/T ... HEET/CD00190234.pdf
4、STM32F10x standard peripheral library：http://www.st.com/internet/com/S ... x_stdperiph_lib.zip
ARM官方：
5、Cortex-M3 Technical Reference Manual Revision r1p1：http://infocenter.arm.com/help/t ... tex_m3_r1p1_trm.pdf
6、ARMv7M Architecture Reference Manual：http://infocenter.arm.com/help/i ... ddi0403c/index.html
非官方的：
The Definitive Guide to the ARM Cortex-M3（中文名：Cortex-M3 权威指南），虽然非官方，但很权威
下面，我们看看关于NVIC寄存器的描述，都在哪些手册里面有提到
在使用STM32F10x standard peripheral library写有关于stm32中断的程序的时候，需要开启某个特定中断的控制位，除了对应外设的寄存器之外，还需要设置NVIC的相关寄存器的对应位。例如：

/****** STM32 specific Interrupt Numbers *********************************************************/ WWDG_IRQn = 0, /*!< Window WatchDog Interrupt */ PVD_IRQn = 1, /*!< PVD through EXTI Line detection Interrupt */ TAMPER_IRQn = 2, /*!< Tamper Interrupt */ RTC_IRQn = 3, /*!< RTC global Interrupt */ FLASH_IRQn = 4, /*!< FLASH global Interrupt */ RCC_IRQn = 5, /*!< RCC global Interrupt */ EXTI0_IRQn = 6, /*!< EXTI Line0 Interrupt */ EXTI1_IRQn = 7, /*!< EXTI Line1 Interrupt */ EXTI2_IRQn = 8, /*!< EXTI Line2 Interrupt */ EXTI3_IRQn = 9, /*!< EXTI Line3 Interrupt */ EXTI4_IRQn = 10, /*!< EXTI Line4 Interrupt */ DMA1_Channel1_IRQn = 11, /*!< DMA1 Channel 1 global Interrupt */ DMA1_Channel2_IRQn = 12, /*!< DMA1 Channel 2 global Interrupt */ DMA1_Channel3_IRQn = 13, /*!< DMA1 Channel 3 global Interrupt */ DMA1_Channel4_IRQn = 14, /*!< DMA1 Channel 4 global Interrupt */ DMA1_Channel5_IRQn = 15, /*!< DMA1 Channel 5 global Interrupt */ DMA1_Channel6_IRQn = 16, /*!< DMA1 Channel 6 global Interrupt */ DMA1_Channel7_IRQn = 17, /*!< DMA1 Channel 7 global Interrupt */ NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel1_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure);
而NVIC_Init()这个函数：

/** * @brief Initializes the NVIC peripheral according to the specified * parameters in the NVIC_InitStruct. * @param NVIC_InitStruct: pointer to a NVIC_InitTypeDef structure that contains * the configuration information for the specified NVIC peripheral. * @retval None */void NVIC_Init(NVIC_InitTypeDef* NVIC_InitStruct){ uint32_t tmppriority = 0x00, tmppre = 0x00, tmpsub = 0x0F; /* Check the parameters */ assert_param(IS_FUNCTIONAL_STATE(NVIC_InitStruct->NVIC_IRQChannelCmd)); assert_param(IS_NVIC_PREEMPTION_PRIORITY(NVIC_InitStruct->NVIC_IRQChannelPreemptionPriority)); assert_param(IS_NVIC_SUB_PRIORITY(NVIC_InitStruct->NVIC_IRQChannelSubPriority)); if (NVIC_InitStruct->NVIC_IRQChannelCmd != DISABLE) { /* Compute the Corresponding IRQ Priority --------------------------------*/ tmppriority = (0x700 - ((SCB->AIRCR) & (uint32_t)0x700))>> 0x08; tmppre = (0x4 - tmppriority); tmpsub = tmpsub >> tmppriority; tmppriority = (uint32_t)NVIC_InitStruct->NVIC_IRQChannelPreemptionPriority << tmppre; tmppriority |= NVIC_InitStruct->NVIC_IRQChannelSubPriority & tmpsub; tmppriority = tmppriority << 0x04; NVIC->IP[NVIC_InitStruct->NVIC_IRQChannel] = tmppriority; /* Enable the Selected IRQ Channels --------------------------------------*/ NVIC->ISER[NVIC_InitStruct->NVIC_IRQChannel >> 0x05] = (uint32_t)0x01 << (NVIC_InitStruct->NVIC_IRQChannel & (uint8_t)0x1F); } else { /* Disable the Selected IRQ Channels -------------------------------------*/ NVIC->ICER[NVIC_InitStruct->NVIC_IRQChannel >> 0x05] = (uint32_t)0x01 << (NVIC_InitStruct->NVIC_IRQChannel & (uint8_t)0x1F); }}

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