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程序本来使用的spi1，我想将其换成spi2，请问应该怎样修改程序，需要修改哪些地方。我刚刚接触这种片子，实在是无从下手，下面有源程序代码，请修改好后加上注释，先谢谢了 unsigned char RCC_Configuration(void){ ErrorStatus HSEStartUpStatus; /* RCC system reset(for debug purpose) */ RCC_DeInit(); /* Enable HSE */ RCC_HSEConfig(RCC_HSE_ON); /* Wait till HSE is ready */ HSEStartUpStatus = RCC_WaitForHSEStartUp(); if(HSEStartUpStatus == SUCCESS) { /* HCLK = SYSCLK */ RCC_HCLKConfig(RCC_SYSCLK_Div1); /* PCLK2 = HCLK */ RCC_PCLK2Config(RCC_HCLK_Div1); RCC_PCLK1Config(RCC_HCLK_Div2); RCC_ADCCLKConfig(RCC_PCLK2_Div4); FLASH_SetLatency(FLASH_Latency_2); FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable); 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){}; } else return FALSE; RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C2 | RCC_APB1Periph_TIM2, ENABLE); /* Enable GPIOA GPIOB SPI1 and USART1 clocks */ RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB | RCC_APB2Periph_GPIOC |RCC_APB2Periph_GPIOF| RCC_APB2Periph_USART1 | RCC_APB2Periph_SPI1 | RCC_APB2Periph_ADC1 | RCC_APB2Periph_AFIO, ENABLE); return TRUE;}void SPI_Configuration(void){ GPIO_InitTypeDef GPIO_InitStructure; SPI_InitTypeDef SPI_InitStructure; /* Configure SPI1 pins: SCK, MISO and MOSI -------------*/ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5 | GPIO_Pin_6 | GPIO_Pin_7; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; GPIO_Init(GPIOA, &GPIO_InitStructure); /* Set Chip Select pin */ GPIO_InitStructure.GPIO_Pin=GPIO_Pin_3| GPIO_Pin_4; GPIO_InitStructure.GPIO_Speed=GPIO_Speed_10MHz; GPIO_InitStructure.GPIO_Mode=GPIO_Mode_Out_PP; GPIO_Init(GPIOA, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin=GPIO_Pin_1; GPIO_InitStructure.GPIO_Speed=GPIO_Speed_10MHz; GPIO_InitStructure.GPIO_Mode=GPIO_Mode_Out_PP; GPIO_Init(GPIOA, &GPIO_InitStructure); GPIO_SetBits(GPIOA, GPIO_Pin_3); GPIO_SetBits(GPIOA, GPIO_Pin_1); GPIO_SetBits(GPIOA, GPIO_Pin_4); /* Set SPI interface */ 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_Low; SPI_InitStructure.SPI_CPHA=SPI_CPHA_1Edge; SPI_InitStructure.SPI_NSS=SPI_NSS_Soft; SPI_InitStructure.SPI_BaudRatePrescaler=SPI_BaudRatePrescaler_8; SPI_InitStructure.SPI_FirstBit=SPI_FirstBit_MSB; SPI_InitStructure.SPI_CRCPolynomial=7; SPI_Init(SPI1,&SPI_InitStructure); SPI_Cmd(SPI1,ENABLE); //Enable SPI1} |
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RE:stm32f103把spi1换成spi2需要做哪些修改
2、配置SPI2
使用和SPI1一样，先开时钟，再配置，然后再使用。
RE:stm32f103把spi1换成spi2需要做哪些修改
unsigned char RCC_Configuration(void)
{
ErrorStatus HSEStartUpStatus;
/* RCC system reset(for debug purpose) */
RCC_DeInit();
/* Enable HSE */
RCC_HSEConfig(RCC_HSE_ON);
/* Wait till HSE is ready */
HSEStartUpStatus = RCC_WaitForHSEStartUp();
if(HSEStartUpStatus == SUCCESS)
{
/* HCLK = SYSCLK */
RCC_HCLKConfig(RCC_SYSCLK_Div1);
/* PCLK2 = HCLK */
RCC_PCLK2Config(RCC_HCLK_Div1);
/* PCLK1 = HCLK/2 */
RCC_PCLK1Config(RCC_HCLK_Div2);
/* ADCCLK = PCLK2/4 */
RCC_ADCCLKConfig(RCC_PCLK2_Div4);
/* Flash 2 wait state */
FLASH_SetLatency(FLASH_Latency_2);
/* Enable Prefetch Buffer */
FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);
/* PLLCLK = 8MHz * 9 / 2 = 36 MHz */
RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9);
/* Enable PLL */
RCC_PLLCmd(ENABLE);
/* Wait till PLL is ready */
while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET){};
/* Select PLL as system clock source */
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
/* Wait till PLL is used as system clock source */
while(RCC_GetSYSCLKSource() != 0x08){};
}
else
return FALSE;
/* Enable peripheral clocks --------------------------------------------------*/
/* Enable I2C1 and I2C1 clock */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2 | /*RCC_APB1Periph_I2C2 | */RCC_APB1Periph_TIM2, ENABLE);
/* Enable GPIOA GPIOB SPI1 and USART1 clocks */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB
| RCC_APB2Periph_GPIOC |RCC_APB2Periph_GPIOF| RCC_APB2Periph_USART1
| RCC_APB2Periph_ADC1
| RCC_APB2Periph_AFIO, ENABLE);
return TRUE;
}
/**
*@brief SPI Initialization
**/
void SPI_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
SPI_InitTypeDef SPI_InitStructure;
/* Configure SPI1 pins: SCK, MISO and MOSI -------------*/
GPIO_InitStructure.GPIO_Pin =GPIO_Pin_13 | GPIO_Pin_14 | GPIO_Pin_15;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(GPIOB, &GPIO_InitStructure);
// 片选
GPIO_InitStructure.GPIO_Pin=GPIO_Pin_12;
GPIO_InitStructure.GPIO_Speed=GPIO_Speed_10MHz;
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_Out_PP;
GPIO_Init(GPIOB, &GPIO_InitStructure);
//使能端
GPIO_InitStructure.GPIO_Pin=GPIO_Pin_11;
GPIO_InitStructure.GPIO_Speed=GPIO_Speed_10MHz;
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_Out_PP;
GPIO_Init(GPIOB, &GPIO_InitStructure);
//复位端
GPIO_InitStructure.GPIO_Pin=GPIO_Pin_10;
GPIO_InitStructure.GPIO_Speed=GPIO_Speed_10MHz;
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_Out_PP;
GPIO_Init(GPIOB, &GPIO_InitStructure);
GPIO_SetBits(GPIOB, GPIO_Pin_11);
GPIO_SetBits(GPIOB, GPIO_Pin_10);
GPIO_SetBits(GPIOB, GPIO_Pin_12);
/* Set SPI interface */
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_Low;
SPI_InitStructure.SPI_CPHA=SPI_CPHA_1Edge;
SPI_InitStructure.SPI_NSS=SPI_NSS_Soft;
SPI_InitStructure.SPI_BaudRatePrescaler=SPI_BaudRatePrescaler_8;
SPI_InitStructure.SPI_FirstBit=SPI_FirstBit_MSB;
SPI_InitStructure.SPI_CRCPolynomial=7;
SPI_Init(SPI2,&SPI_InitStructure);
SPI_Cmd(SPI2,ENABLE); //Enable SPI2
}
回复:stm32f103把spi1换成spi2需要做哪些修改
{
ErrorStatus HSEStartUpStatus;//定义了一个布尔型变量
/* RCC system reset(for debug purpose) */
RCC_DeInit(); //将时钟配置寄存器初始化为默认值
/* Enable HSE */
RCC_HSEConfig(RCC_HSE_ON);//使能外部高速时钟
/* Wait till HSE is ready */
HSEStartUpStatus = RCC_WaitForHSEStartUp();//等待外部高速时钟准备好
if(HSEStartUpStatus == SUCCESS)//如果外部高速时钟准备好
{
/* HCLK = SYSCLK */
RCC_HCLKConfig(RCC_SYSCLK_Div1);//AHB总线时钟为系统时钟的一分频
/* PCLK2 = HCLK */
RCC_PCLK2Config(RCC_HCLK_Div1);//APB2总线时钟为AHB总线时钟的一分频
/* PCLK1 = HCLK/2 */
RCC_PCLK1Config(RCC_HCLK_Div2);//AHPB1总线时钟为AHB总线时钟的二分频
/* ADCCLK = PCLK2/4 */
RCC_ADCCLKConfig(RCC_PCLK2_Div4);//ADC时钟为APB2总线时钟的四分频
/* Flash 2 wait state */
FLASH_SetLatency(FLASH_Latency_2);//设置Flash为2个等待周期
/* Enable Prefetch Buffer */
FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);//使能预取指缓冲区
RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9);//锁相环时钟源外外部高速时钟、倍频系数为9（如果外部高速时钟为8MHZ,外部时钟经PPL倍频后的时钟频率为8*9=72MHZ）
/* Enable PLL */
RCC_PLLCmd(ENABLE);//PPL使能
/* Wait till PLL is ready */
while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET){};//等待锁相环时钟准备好
/* Select PLL as system clock source */
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);//将锁相环时钟作为系统时钟源
/* Wait till PLL is used as system clock source */
while(RCC_GetSYSCLKSource() != 0x08){};//等待锁相环时钟作为系统时钟准备好
}
else //如果外部高速时钟无法启动成功
return FALSE; //返回错误值
/* 使能外设时钟 --------------------------------------------------*/
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB|RCC_APB2Periph_AFIO, ENABLE ); //spi2端口时钟使能
RCC_APB1PeriphClockCmd( RCC_APB1Periph_SPI2, ENABLE );
} //spi2使能
/**
*@brief SPI Initialization
**/
void SPI_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
SPI_InitTypeDef SPI_InitStructure;
/* Configure SPI2 pins: SCK, MISO and MOSI -------------*/
GPIO_InitStructure.GPIO_Pin =GPIO_Pin_13 | GPIO_Pin_14 | GPIO_Pin_15;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(GPIOB, &GPIO_InitStructure);
// 片选
GPIO_InitStructure.GPIO_Pin=GPIO_Pin_12;
GPIO_InitStructure.GPIO_Speed=GPIO_Speed_10MHz;
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_Out_PP;
GPIO_Init(GPIOB, &GPIO_InitStructure);
//使能端
GPIO_InitStructure.GPIO_Pin=GPIO_Pin_11;
GPIO_InitStructure.GPIO_Speed=GPIO_Speed_10MHz;
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_Out_PP;
GPIO_Init(GPIOB, &GPIO_InitStructure);
//复位端
GPIO_InitStructure.GPIO_Pin=GPIO_Pin_10;
GPIO_InitStructure.GPIO_Speed=GPIO_Speed_10MHz;
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_Out_PP;
GPIO_Init(GPIOB, &GPIO_InitStructure);
GPIO_SetBits(GPIOB, GPIO_Pin_11);
GPIO_SetBits(GPIOB, GPIO_Pin_10);
GPIO_SetBits(GPIOB, GPIO_Pin_12);
/* Set SPI interface */
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_Low;
SPI_InitStructure.SPI_CPHA=SPI_CPHA_1Edge;
SPI_InitStructure.SPI_NSS=SPI_NSS_Soft;
SPI_InitStructure.SPI_BaudRatePrescaler=SPI_BaudRatePrescaler_8;
SPI_InitStructure.SPI_FirstBit=SPI_FirstBit_MSB;
SPI_InitStructure.SPI_CRCPolynomial=7;
SPI_Init(SPI2,&SPI_InitStructure);
SPI_Cmd(SPI2,ENABLE); //Enable SPI2
}
如果SPI1和SPI2都使用，并且各去接不同的外设模块，会造成冲突吗？谢谢