#include <stm32f10x_lib.h> #include "system.h"#include "usart.h" #include "spi.h"#define LED1 PAout(4)#define LED2 PAout(5)#define LED3 PAout(6)#define LED4 PAout(7)void Gpio_Init(void);#define BufferSize 32u8 SPI1_Buffer_Tx[BufferSize] = { 0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08, 0x09,0x0A,0x0B,0x0C,0x0D,0x0E,0x0F,0x10, 0x11,0x12,0x13,0x14,0x15,0x16,0x17,0x18, 0x19,0x1A,0x1B,0x1C,0x1D,0x1E,0x1F,0x20};u8 SPI2_Buffer_Tx[BufferSize] = { 0x51,0x52,0x53,0x54,0x55,0x56,0x57,0x58, 0x59,0x5A,0x5B,0x5C,0x5D,0x5E,0x5F,0x60, 0x61,0x62,0x63,0x64,0x65,0x66,0x67,0x68, 0x69,0x6A,0x6B,0x6C,0x6D,0x6E,0x6F,0x70};u8 SPI1_Buffer_Rx[BufferSize] = {0xFF};u8 SPI2_Buffer_Rx[BufferSize] = {0xFF};u8 Tx_Counter = 0;u8 Rx_Counter = 0;int main(void){ u8 k=0; Rcc_Init(9); //系统时钟设置 Usart1_Init(72,9600); Nvic_Init(1,0,SPI1_IRQChannel,4); //设置抢占优先级为1,响应优先级为0,中断分组为4 Nvic_Init(1,1,SPI2_IRQChannel,4); //设置抢占优先级为1,响应优先级为1,中断分组为4 Gpio_Init(); Spi_Init(SPI1); Spi_Init(SPI2); while(Tx_Counter < BufferSize) { Spi_Write(SPI2,SPI2_Buffer_Tx[Tx_Counter]); //必须先将从设备数据写入数据寄存器,等待时钟同步 Spi_Write(SPI1,SPI1_Buffer_Tx[Tx_Counter]); //主设备将数据写入数据寄存器,触发同步时钟,让主从数据寄存器由此时钟发送 SPI2_Buffer_Rx[Rx_Counter] = Spi_Read(SPI2); SPI1_Buffer_Rx[Rx_Counter] = Spi_Read(SPI1); Tx_Counter++; Rx_Counter++; } printf("\r\n The SPI1 has sended data below : \r\n"); while(k<BufferSize) { printf(" %0.2d \r ",SPI1_Buffer_Tx[k]); k++; } printf("\r\n The SPI2 has received data below : \r\n"); k=0; while(k<BufferSize) { printf(" %0.2d \r ",SPI2_Buffer_Rx[k]); k++; } k=0; printf("\r\n The SPI2 has sended data below : \r\n"); while(k<BufferSize) { printf(" %0.2d \r ",SPI2_Buffer_Tx[k]); k++; } printf("\r\n The SPI1 has received data below : \r\n"); k=0; while(k<BufferSize) { printf(" %0.2d \r ",SPI1_Buffer_Rx[k]); k++; } while(1); }void Gpio_Init(void){ RCC->APB2ENR |= 1<<2; //使能PORTA时钟 RCC->APB2ENR |= 1<<3; //使能PORTB时钟; //SPI1 I/O设置 GPIOA->CRL &= 0x000FFFFF; //PA 5,6,7 复用 GPIOA->CRL |= 0xBBB00000; //SPI2 I/O设置 GPIOB->CRH &= 0x000FFFFF; //PB 13,14,15 复用 GPIOB->CRH |= 0xBBB00000; //USART1 串口I/O设置 GPIOA -> CRH &= 0xFFFFF00F; //设置USART1 的Tx(PA.9)为第二功能推挽,50MHz;Rx(PA.10)为浮空输入 GPIOA -> CRH |= 0x000008B0; }
#include "stm32f10x_it.h"#include "system.h"#include "stdio.h"#define LED1 PAout(4)#define LED2 PAout(5)#define LED3 PAout(6)#define LED4 PAout(7)void SPI1_IRQHandler(){ if(SPI1->SR & 1<<7) //SPI正忙于通信,或者发送缓冲非空 { printf("SPI1 is Busy"); } if(SPI1->SR & 1<<6) // 出现溢出错误 { printf("SPI1 is Overrun"); } if(SPI1->SR & 1<<5) //出现模式错误 { printf("SPI1 is Mode fault"); } if(SPI1->SR & 1<<4) //收到的CRC值和SPI_RXCRCR寄存器中的值不匹配 { printf("SPI1 is CRC Error"); } printf("SPI1 Error");}void SPI2_IRQHandler(){ printf("SPI2 Error");}
#include "spi.h"//SPI初始化函数//SPI1主机模式,SPI2从机模式,8bit数据格式,时钟空闲保持为低,数据采样从第二个时钟边沿开始,波特率 fPCLK/32//先发送LSB(最低有效位),禁止硬件CRC校验void Spi_Init(SPI_TypeDef * SPIx) { if(SPIx == SPI1){ RCC -> APB2ENR |= 1<<12; //SPI1时钟使能 RCC -> APB2RSTR |= 1<<12; //复位SPI1寄存器 RCC -> APB2RSTR &= ~(1<<12); //复位结束SPI1寄存器 SPIx -> CR1 |= 1<<2; //主设备选择 0:配置为从设备 1:配置为主设备 SPIx -> CR1 |= 1<<8; //SSI位,要保持主机模式,必须NSS 接到高电平信号 }else if(SPIx == SPI2){ RCC -> APB1ENR |= 1<<14; //SPI2时钟使能 RCC -> APB1RSTR |= 1<<14; //复位SPI2寄存器 RCC -> APB1RSTR &= ~(1<<14); //复位结束SPI2寄存器 SPIx -> CR1 |= 0<<2; //主设备选择 0:配置为从设备 1:配置为主设备 //SPIx -> CR1 |= 0<<8; //SSI位,要保持主机模式,必须NSS 接到高电平信号 } SPIx -> CR1 |= 0<<10; //设置全双工模式 0:全双工(发送和接收) 1:禁止输出(只接收模式) SPIx -> CR1 |= 0<<11; //数据帧格式 0:使用8位数据帧格式进行发送/接收 1:使用16位数据帧格式进行发送/接收 SPIx -> CR1 |= 1<<7; //帧格式 0:先发送MSB 1:先发送LSB //配置NSS为GPIO输出口控制从设备片选 SPIx -> CR1 |= 1<<9; //软件从设备管理 当此位(SSM)被置位时,NSS引脚上的电平由SSI位的值决定。 SPIx -> CR1 |= 0<<1; //配置时钟极性 0: 空闲状态时,SCK保持低电平 1: 空闲状态时,SCK保持高电平 SPIx -> CR1 |= 1<<0; //时钟相位 0: 数据采样从第一个时钟边沿开始 1: 数据采样从第二个时钟边沿开始 SPIx -> CR1 |= 4<<3; //波特率控制[5:3] 000: fPCLK/2 001: fPCLK/4 010: fPCLK/8 011: fPCLK/16 100: fPCLK/32 // 101: fPCLK/64 110: fPCLK/128 111: fPCLK/256 //SPIx -> CR2 |= 1<<7; //发送缓冲区空中断使能 //SPIx -> CR2 |= 1<<6; //接收缓冲区非空中断使能 SPIx -> CR2 |= 1<<5; //错误中断使能 SPIx -> CR1 |= 1<<6; //SPI设备使能}void Spi_Write(SPI_TypeDef * SPIx,u8 data){ //while((SPIx->SR&1<<1) == 0); //等待发送缓冲为空置位 SPIx->DR = data; Spi_Delay(3); //必须稍作延时}u8 Spi_Read(SPI_TypeDef * SPIx){ //while((SPIx->SR&1<<0) == 1); //等待接收缓冲非空置位 return SPIx->DR;}void Spi_Delay(u32 us){ u32 time=100*us/7; while(--time); }
#include <stm32f10x_lib.h> void Spi_Init(SPI_TypeDef * SPIx);void Spi_Write(SPI_TypeDef * SPIx,u8 data);u8 Spi_Read(SPI_TypeDef * SPIx);void Spi_Delay(u32 us);
#include "stm32f10x.h"#include "stdio.h"#include "string.h"#define PRINTF_ON 1void RCC_Configuration(void);void GPIO_Configuration(void);void USART_Configuration(void);void SPI_Configuration(void);#define BufferSize 32#define delay() for(i=0;i<200;i++)SPI_InitTypeDef SPI_InitStructure;u8 SPI1_Buffer_Tx[BufferSize] = { 0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08, 0x09,0x0A,0x0B,0x0C,0x0D,0x0E,0x0F,0x10, 0x11,0x12,0x13,0x14,0x15,0x16,0x17,0x18, 0x19,0x1A,0x1B,0x1C,0x1D,0x1E,0x1F,0x20};u8 SPI2_Buffer_Tx[BufferSize] = { 0x51,0x52,0x53,0x54,0x55,0x56,0x57,0x58, 0x59,0x5A,0x5B,0x5C,0x5D,0x5E,0x5F,0x60, 0x61,0x62,0x63,0x64,0x65,0x66,0x67,0x68, 0x69,0x6A,0x6B,0x6C,0x6D,0x6E,0x6F,0x70};u8 SPI1_Buffer_Rx[BufferSize+1] = {0};u8 SPI2_Buffer_Rx[BufferSize] = {0};u8 Tx_Counter = 0;u8 Rx_Counter = 0;u8 k=0,i=0;int main(void){ RCC_Configuration(); GPIO_Configuration(); USART_Configuration(); SPI_Configuration(); while(Tx_Counter < BufferSize) { SPI_I2S_SendData(SPI2,SPI2_Buffer_Tx[Tx_Counter]); //必须从机先发送数据 //while(SPI_I2S_GetFlagStatus(SPI2,SPI_I2S_FLAG_TXE)==RESET); //如果spi2 还有发送缓存则等待发送完成 SPI_I2S_SendData(SPI1,SPI1_Buffer_Tx[Tx_Counter]); while(SPI_I2S_GetFlagStatus(SPI2,SPI_I2S_FLAG_RXNE) == RESET); //没有接收缓存则等待 SPI2_Buffer_Rx[Rx_Counter] = SPI_I2S_ReceiveData(SPI2); while(SPI_I2S_GetFlagStatus(SPI1,SPI_I2S_FLAG_RXNE) ==RESET); SPI1_Buffer_Rx[Rx_Counter] = SPI_I2S_ReceiveData(SPI1); Tx_Counter++; Rx_Counter++; } printf("\r\n The SPI1 has sended data below : \r\n"); while(k<BufferSize) { printf(" %0.2d \r ",SPI1_Buffer_Tx[k]); k++; } printf("\r\n The SPI2 has received data below : \r\n"); k=0; while(k<BufferSize) { printf(" %0.2d \r ",SPI2_Buffer_Rx[k]); k++; } k=0; printf("\r\n The SPI2 has sended data below : \r\n"); while(k<BufferSize) { printf(" %0.2d \r ",SPI2_Buffer_Tx[k]); k++; } printf("\r\n The SPI1 has received data below : \r\n"); k=0; while(k<BufferSize) { printf(" %0.2d \r ",SPI1_Buffer_Rx[k]); k++; } while(1); }void SPI_Configuration(void){ SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex; SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b; SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low; 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_LSB; SPI_InitStructure.SPI_CRCPolynomial = 7; SPI_InitStructure.SPI_Mode = SPI_Mode_Master; SPI_Init(SPI1,&SPI_InitStructure); SPI_InitStructure.SPI_Mode = SPI_Mode_Slave; SPI_Init(SPI2,&SPI_InitStructure); SPI_Cmd(SPI1,ENABLE); SPI_Cmd(SPI2,ENABLE);}void GPIO_Configuration(void){ GPIO_InitTypeDef GPIO_InitStructure; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4|GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; GPIO_Init(GPIOA , &GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12|GPIO_Pin_13|GPIO_Pin_14|GPIO_Pin_15; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; GPIO_Init(GPIOB , &GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; GPIO_Init(GPIOA , &GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; GPIO_Init(GPIOA , &GPIO_InitStructure); }void RCC_Configuration(void){ /* 定义枚举类型变量 HSEStartUpStatus */ ErrorStatus HSEStartUpStatus; /* 复位系统时钟设置*/ RCC_DeInit(); /* 开启HSE*/ RCC_HSEConfig(RCC_HSE_ON); /* 等待HSE起振并稳定*/ HSEStartUpStatus = RCC_WaitForHSEStartUp(); /* 判断HSE起是否振成功,是则进入if()内部 */ if(HSEStartUpStatus == SUCCESS) { /* 选择HCLK(AHB)时钟源为SYSCLK 1分频 */ RCC_HCLKConfig(RCC_SYSCLK_Div1); /* 选择PCLK2时钟源为 HCLK(AHB) 1分频 */ RCC_PCLK2Config(RCC_HCLK_Div1); /* 选择PCLK1时钟源为 HCLK(AHB) 2分频 */ RCC_PCLK1Config(RCC_HCLK_Div2); /* 设置FLASH延时周期数为2 */ FLASH_SetLatency(FLASH_Latency_2); /* 使能FLASH预取缓存 */ FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable); /* 选择锁相环(PLL)时钟源为HSE 1分频,倍频数为9,则PLL输出频率为 8MHz * 9 = 72MHz */ RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9); /* 使能PLL */ RCC_PLLCmd(ENABLE); /* 等待PLL输出稳定 */ while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET); /* 选择SYSCLK时钟源为PLL */ RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK); /* 等待PLL成为SYSCLK时钟源 */ while(RCC_GetSYSCLKSource() != 0x08); } /* 打开APB2总线上的GPIOA时钟*/ RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_GPIOB|RCC_APB2Periph_USART1|RCC_APB2Periph_SPI1, ENABLE); //RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE); RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2,ENABLE); //RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR|RCC_APB1Periph_BKP|RCC_APB1Periph_WWDG, ENABLE); } void USART_Configuration(void){ USART_InitTypeDef USART_InitStructure; USART_ClockInitTypeDef USART_ClockInitStructure; USART_ClockInitStructure.USART_Clock = USART_Clock_Disable; USART_ClockInitStructure.USART_CPOL = USART_CPOL_Low; USART_ClockInitStructure.USART_CPHA = USART_CPHA_2Edge; USART_ClockInitStructure.USART_LastBit = USART_LastBit_Disable; USART_ClockInit(USART1 , &USART_ClockInitStructure); 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); USART_Cmd(USART1,ENABLE);}#if PRINTF_ONint fputc(int ch,FILE *f){ USART_SendData(USART1,(u8) ch); while(USART_GetFlagStatus(USART1,USART_FLAG_TC) == RESET); return ch;}#endif
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