STM32F103编程那些事儿

编程三重点：进程或事件管理和数据结构，最后才是代码之美。

一、代码之美那就是看本事了。引用ST库函数。

二、数据结构

1、GPIO寄存器配置结构体GPIO_InitTypeDef

void GPIO_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure; //定义GPIO_InitTypeDef结构体变量
/* Configure PE.0,PE.1 as Output push-pull */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 ;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOE, &GPIO_InitStructure);
}

2、EXTI寄存器配置结构体NVIC_InitTypeDef

static void NVIC_Configuration(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
NVIC_InitStructure.NVIC_IRQChannel = EXTI9_5_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x02;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x02;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}

3、USARTx寄存器配置结构体USART_InitTypeDef

{
USART_InitTypeDef USART_InitStructure;
USART_InitStructure.USART_BaudRate = 9600;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_Parity = USART_Parity_No;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
USART_Init(USART1, &USART_InitStructure);
}

4、ADC寄存器配置结构体ADC_InitTypeDef

{
ADC_InitTypeDef ADC_InitStructure;
ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
ADC_InitStructure.ADC_ScanConvMode = DISABLE;
ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
ADC_InitStructure.ADC_NbrOfChannel = 1; /
ADC_Init(ADC1, &ADC_InitStructure);
}

5、DAC寄存器配置结构体DAC_InitTypeDef

{
DAC_InitTypeDef DAC_InitStructure;
DAC_InitStructure.DAC_Trigger=DAC_Trigger_None;
DAC_InitStructure.DAC_WaveGeneration=DAC_WaveGeneration_None;
DAC_InitStructure.DAC_LFSRUnmask_TriangleAmplitude=DAC_LFSRUnmask_Bit0;
DAC_InitStructure.DAC_OutputBuffer=DAC_OutputBuffer_Disable ;
DAC_Init(DAC_Channel_1,&DAC_InitStructure);
}

6、DMA寄存器配置结构体DMA_InitTypeDef

{
DMA_InitTypeDef DMA_InitStructure;
DMA_InitStructure.DMA_PeripheralBaseAddr = Adc1_Dr_Numerical;
DMA_InitStructure.DMA_MemoryBaseAddr = (u32)&Adc_Numerical;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
DMA_InitStructure.DMA_BufferSize = 1;
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Disable;
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
DMA_InitStructure.DMA_Priority = DMA_Priority_Medium;
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
DMA_Init(DMA1_Channel1, &DMA_InitStructure);
}

7、SPI寄存器配置结构体SPI_InitTypeDef

{
SPI_InitTypeDef SPI_InitStructure;
SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;
SPI_InitStructure.SPI_CPOL = SPI_CPOL_High;
SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge;
SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_4;
SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
SPI_InitStructure.SPI_CRCPolynomial = 7;
SPI_Init(SPI1, &SPI_InitStructure);
}

8、TIM寄存器配置结构体TIM_TimeBaseStructure

{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_TimeBaseStructure.TIM_Period = 2000-1;
TIM_TimeBaseStructure.TIM_Prescaler =36000-1;
TIM_TimeBaseStructure.TIM_ClockDivision = 0;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);
}

9、PWM寄存器配置结构体TIM_OCInitTypeDef

{
TIM_OCInitTypeDef TIM_OCInitStructure;
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_Pulse = 0;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OC3Init(TIM3, &TIM_OCInitStructure);
}

10、CAN寄存器配置结构体CAN_InitTypeDef

void CAN_Configuration(uint8_t Pattern)
{
CAN_InitTypeDef CAN_InitStructure;
CAN_InitStructure.CAN_TTCM=DISABLE;
CAN_InitStructure.CAN_ABOM=DISABLE;
CAN_InitStructure.CAN_AWUM=DISABLE;
CAN_InitStructure.CAN_NART=ENABLE;
CAN_InitStructure.CAN_RFLM=DISABLE;
CAN_InitStructure.CAN_TXFP=DISABLE;
CAN_InitStructure.CAN_Mode= Pattern;
CAN_InitStructure.CAN_SJW=CAN_SJW_1tq;
CAN_InitStructure.CAN_BS1=CAN_BS1_3tq;
CAN_InitStructure.CAN_BS2=CAN_BS2_2tq;
CAN_InitStructure.CAN_Prescaler=48;
CAN_Init(CAN1, &CAN_InitStructure);
}

11、IIC寄存器配置结构体I2C_InitTypeDef

{
I2C_InitTypeDef I2C1_InitStructure;
/* IOE_I2C configuration */
I2C1_InitStructure.I2C_Mode = I2C_Mode_I2C;
I2C1_InitStructure.I2C_DutyCycle = I2C_DutyCycle_2;
I2C1_InitStructure.I2C_OwnAddress1 = 0x00;
I2C1_InitStructure.I2C_Ack = I2C_Ack_Enable;
I2C1_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
I2C1_InitStructure.I2C_ClockSpeed = 20000;
I2C_Init(I2C1, &I2C1_InitStructure);
}

12、SDIO寄存器配置结构体SDIO_InitTypeDef

void SDIO_StructInit(SDIO_InitTypeDef* SDIO_InitStruct)
{
/* SDIO_InitStruct members default value */
SDIO_InitStruct->SDIO_ClockDiv = 0x00;
SDIO_InitStruct->SDIO_ClockEdge = SDIO_ClockEdge_Rising;
SDIO_InitStruct->SDIO_ClockBypass = SDIO_ClockBypass_Disable;
SDIO_InitStruct->SDIO_ClockPowerSave = SDIO_ClockPowerSave_Disable;
SDIO_InitStruct->SDIO_BusWide = SDIO_BusWide_1b;
SDIO_InitStruct->SDIO_HardwareFlowControl = SDIO_HardwareFlowControl_Disable;
}

三、进程或事件管理

1、时钟控制

void RCC_Configuration(void)
{
ErrorStatus HSEStartUpStatus;
RCC_DeInit();
RCC_HSEConfig(RCC_HSE_ON);
HSEStartUpStatus = RCC_WaitForHSEStartUp();
if(HSEStartUpStatus == SUCCESS)
{
FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);
FLASH_SetLatency(FLASH_Latency_2);

RCC_HCLKConfig(RCC_SYSCLK_Div1);               
RCC_PCLK2Config(RCC_HCLK_Div1);               
RCC_PCLK1Config(RCC_HCLK_Div2);                RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9);  
RCC_PLLCmd(ENABLE);                                   while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET)    
{
}
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);            
while(RCC_GetSYSCLKSource() != 0x08)                  
{
}

}
}

2、SYSTICK定时器

void delay_init(uint8_t SYSCLK)
{
SysTick->CTRL&=0xfffffffb;
fac_us=SYSCLK/8;
fac_ms=(u16)fac_us*1000;
}

void delay_ms(uint16_t nms)
{
uint32_t temp;
SysTick->LOAD=(u32)nms*fac_ms;
SysTick->VAL =0x00;
SysTick->CTRL=0x01 ;
do
{
temp=SysTick->CTRL;
}
while(temp&0x01&&!(temp&(1<<16)));
SysTick->CTRL=0x00;
SysTick->VAL =0X00;
}

void delay_us(uint32_t nus)
{
uint32_t temp;
SysTick->LOAD=nus*fac_us;
SysTick->VAL=0x00;
SysTick->CTRL=0x01 ;
do
{
temp=SysTick->CTRL;
}
while(temp&0x01&&!(temp&(1<<16)));
SysTick->CTRL=0x00;
SysTick->VAL =0X00;
}

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