标签:sof inpu ssi print add spi typedef lock 数据
没有试30000sps
采样率低可能还不能用,需要改变SPI速率等
使用ADS1256DRDY引脚作中断触发进行数据采集
main.c中(死循环前只执行一次):
1 if (state) 2 { 3 ADS1256WREG(ADS1256_MUX,(0 << 4) | ADS1256_MUXN_AINCOM); //ÉèÖÃͨµÀ 4 5 GPIO_ResetBits(GPIOB, GPIO_Pin_6);; 6 while(GPIO_ReadInputDataBit(GPIO_ADS1256DRDY_PORT,GPIO_ADS1256DRDY)); //µ±ADS1256_DRDYΪµÍʱ²ÅÄÜд¼Ä´æÆ÷ 7 // ADS1256WREG(ADS1256_MUX,channel); //ÉèÖÃͨµÀ 8 SPI_WriteByte(ADS1256_CMD_SYNC); 9 // while(GPIO_ReadInputDataBit(GPIO_ADS1256DRDY_PORT,GPIO_ADS1256DRDY)); 10 SPI_WriteByte(ADS1256_CMD_WAKEUP); 11 while(GPIO_ReadInputDataBit(GPIO_ADS1256DRDY_PORT,GPIO_ADS1256DRDY)); 12 SPI_WriteByte(ADS1256_CMD_RDATAC); 13 while(GPIO_ReadInputDataBit(GPIO_ADS1256DRDY_PORT,GPIO_ADS1256DRDY)); 14 TIM_Cmd(TIM4, ENABLE); //ʹÄÜTIMxÍâÉè 15 delay_us(8); 16 state = 0; 17 }
外部中断:
u8 state=1; long double getval[15010]; static u32 i; //ÍⲿÖжÏ0·þÎñ³ÌÐò void EXTI9_5_IRQHandler(void) { long ulResult; long double ldVolutage; if(EXTI_GetITStatus(EXTI_Line8)!=RESET) { // ADS1256WREG(ADS1256_MUX,(0 << 4) | ADS1256_MUXN_AINCOM); //ÉèÖÃͨµÀ // // GPIO_ResetBits(GPIOB, GPIO_Pin_6);; // while(GPIO_ReadInputDataBit(GPIO_ADS1256DRDY_PORT,GPIO_ADS1256DRDY)); //µ±ADS1256_DRDYΪµÍʱ²ÅÄÜд¼Ä´æÆ÷ // // ADS1256WREG(ADS1256_MUX,channel); //ÉèÖÃͨµÀ // SPI_WriteByte(ADS1256_CMD_SYNC); // // while(GPIO_ReadInputDataBit(GPIO_ADS1256DRDY_PORT,GPIO_ADS1256DRDY)); // SPI_WriteByte(ADS1256_CMD_WAKEUP); // while(GPIO_ReadInputDataBit(GPIO_ADS1256DRDY_PORT,GPIO_ADS1256DRDY)); // SPI_WriteByte(ADS1256_CMD_RDATA); // while(GPIO_ReadInputDataBit(GPIO_ADS1256DRDY_PORT,GPIO_ADS1256DRDY)); // delay_us(8); // if(i<15000) { ulResult |= (SPI_WriteByte(0xff) << 16); ulResult |= (SPI_WriteByte(0xff) << 8); ulResult |= SPI_WriteByte(0xff); state = 1; if( ulResult & 0x800000 ) { ulResult = ~(unsigned long)ulResult; ulResult &= 0x7fffff; ulResult += 1; ulResult = -ulResult; } getval[i++] = (long double)ulResult*5/8388607; // i++; // printf("i = %d\r\n",i); // printf("%lf",ldVolutage); //double // printf("V\r\n"); } else { // for(int t = 0;t<i;t++) // { // printf("t = %d\r\n",t); // printf("%lf",getval[t]); //double // printf("V\r\n"); // } i=0; } } EXTI_ClearITPendingBit(EXTI_Line8); //Çå³ýLINE0ÉϵÄÖжϱê־λ } //ÍⲿÖжϳõʼ»¯³ÌÐò //³õʼ»¯PE2~4,PA0ΪÖжÏÊäÈë. void EXTIX_Init(void) { NVIC_InitTypeDef NVIC_InitStructure; EXTI_InitTypeDef EXTI_InitStructure; // KEY_Init(); //°´¼ü¶ÔÓ¦µÄIO¿Ú³õʼ»¯ RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);//ʹÄÜSYSCFGʱÖÓ SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOB, EXTI_PinSource8);//PB8 Á¬½Óµ½ÖжÏÏß8 /* ÅäÖÃEXTI_Line2,3,4 */ EXTI_InitStructure.EXTI_Line = EXTI_Line8; EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;//ÖжÏʼþ EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling; //下降沿触发 EXTI_InitStructure.EXTI_LineCmd = ENABLE;//ÖжÏÏßʹÄÜ EXTI_Init(&EXTI_InitStructure);//ÅäÖà NVIC_InitStructure.NVIC_IRQChannel = EXTI9_5_IRQn;//ÍⲿÖжÏ0 NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x00;//ÇÀÕ¼ÓÅÏȼ¶0 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x02;//×ÓÓÅÏȼ¶2 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;//ʹÄÜÍⲿÖжÏͨµÀ NVIC_Init(&NVIC_InitStructure);//ÅäÖà }
ADS1256配置
void SPI1_Init(void) { GPIO_InitTypeDef GPIO_InitStructure; SPI_InitTypeDef SPI_InitStructure; // RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB, ENABLE);//ʹÄÜGPIOBʱÖÓ RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1, ENABLE);//ʹÄÜSPI1ʱÖÓ //GPIOFB3,4,5³õʼ»¯ÉèÖà GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3|GPIO_Pin_4|GPIO_Pin_5;//PB3~5¸´Óù¦ÄÜÊä³ö GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;//¸´Óù¦ÄÜ GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;//ÍÆÍìÊä³ö GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;//100MHz GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;//ÉÏÀ GPIO_Init(GPIOB, &GPIO_InitStructure);//³õʼ»¯ GPIO_PinAFConfig(GPIOB,GPIO_PinSource3,GPIO_AF_SPI1); //PB3¸´ÓÃΪ SPI1 GPIO_PinAFConfig(GPIOB,GPIO_PinSource4,GPIO_AF_SPI1); //PB4¸´ÓÃΪ SPI1 GPIO_PinAFConfig(GPIOB,GPIO_PinSource5,GPIO_AF_SPI1); //PB5¸´ÓÃΪ SPI1 //ÕâÀïÖ»Õë¶ÔSPI¿Ú³õʼ»¯ RCC_APB2PeriphResetCmd(RCC_APB2Periph_SPI1,ENABLE);//¸´Î»SPI1 RCC_APB2PeriphResetCmd(RCC_APB2Periph_SPI1,DISABLE);//Í£Ö¹¸´Î»SPI1 SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex; //ÉèÖÃSPIµ¥Ïò»òÕßË«ÏòµÄÊý¾Ýģʽ:SPIÉèÖÃΪ˫ÏßË«ÏòÈ«Ë«¹¤ SPI_InitStructure.SPI_Mode = SPI_Mode_Master; //ÉèÖÃSPI¹¤×÷ģʽ:ÉèÖÃΪÖ÷SPI SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b; //ÉèÖÃSPIµÄÊý¾Ý´óС:SPI·¢ËͽÓÊÕ8λ֡½á¹¹ SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low; //´®ÐÐͬ²½Ê±ÖӵĿÕÏÐ״̬ΪµÍµçƽ SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge; //´®ÐÐͬ²½Ê±Öӵĵڶþ¸öÌø±äÑØ£¨ÉÏÉý»òϽµ£©Êý¾Ý±»²ÉÑù SPI_InitStructure.SPI_NSS = SPI_NSS_Soft; //NSSÐźÅÓÉÓ²¼þ£¨NSS¹Ü½Å£©»¹ÊÇÈí¼þ£¨Ê¹ÓÃSSI룩¹ÜÀí:ÄÚ²¿NSSÐźÅÓÐSSIλ¿ØÖÆ SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_32; //¶¨Ò岨ÌØÂÊÔ¤·ÖƵµÄÖµ:²¨ÌØÂÊÔ¤·ÖƵֵΪ256 SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB; //Ö¸¶¨Êý¾Ý´«Êä´ÓMSBλ»¹ÊÇLSBλ¿ªÊ¼:Êý¾Ý´«Êä´ÓMSBλ¿ªÊ¼ SPI_InitStructure.SPI_CRCPolynomial = 7; //CRCÖµ¼ÆËãµÄ¶àÏîʽ SPI_Init(SPI1, &SPI_InitStructure); //¸ù¾ÝSPI_InitStructÖÐÖ¸¶¨µÄ²ÎÊý³õʼ»¯ÍâÉèSPIx¼Ä´æÆ÷ SPI_Cmd(SPI1, ENABLE); //ʹÄÜSPIÍâÉè } //³õʼ»¯ADS1256 GPIO void Init_ADS1256_GPIO(void) { GPIO_InitTypeDef GPIO_InitStructure; RCC -> AHB1ENR |= (1<<1); //PB GPIO_InitStructure.GPIO_Pin = GPIO_RCC_ADS1256Reset|GPIO_Pin_6; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(GPIO_RCC_ADS1256Reset_PORT, &GPIO_InitStructure); GPIO_ResetBits(GPIO_RCC_ADS1256Reset_PORT, GPIO_RCC_ADS1256Reset ); GPIO_InitStructure.GPIO_Pin = GPIO_ADS1256DRDY; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(GPIO_ADS1256DRDY_PORT, &GPIO_InitStructure); SPI1_Init(); } //-----------------------------------------------------------------// // ¹¦ ÄÜ£º Ä£ÄâSPIͨÐÅ // Èë¿Ú²ÎÊý: / ·¢Ë͵ÄSPIÊý¾Ý // ³ö¿Ú²ÎÊý: / ½ÓÊÕµÄSPIÊý¾Ý // È«¾Ö±äÁ¿: / // ±¸ ×¢: ·¢ËͽÓÊÕº¯Êý //-----------------------------------------------------------------// unsigned char SPI_WriteByte(unsigned char TxData) { while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET){}//µÈ´ý·¢ËÍÇø¿Õ SPI_I2S_SendData(SPI1, TxData); //ͨ¹ýÍâÉèSPIx·¢ËÍÒ»¸öbyte Êý¾Ý while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_RXNE) == RESET){} //µÈ´ý½ÓÊÕÍêÒ»¸öbyte return SPI_I2S_ReceiveData(SPI1); //·µ»Øͨ¹ýSPIx×î½ü½ÓÊÕµÄÊý¾Ý } //-----------------------------------------------------------------// // ¹¦ ÄÜ£ºADS1256 дÊý¾Ý // Èë¿Ú²ÎÊý: / // ³ö¿Ú²ÎÊý: / // È«¾Ö±äÁ¿: / // ±¸ ×¢: ÏòADS1256ÖеØַΪregaddrµÄ¼Ä´æÆ÷дÈëÒ»¸ö×Ö½Údatabyte //-----------------------------------------------------------------// void ADS1256WREG(unsigned char regaddr,unsigned char databyte) { GPIO_ResetBits(GPIOB, GPIO_Pin_6); while(GPIO_ReadInputDataBit(GPIO_ADS1256DRDY_PORT,GPIO_ADS1256DRDY));//µ±ADS1256_DRDYΪµÍʱ²ÅÄÜд¼Ä´æÆ÷ //Ïò¼Ä´æÆ÷дÈëÊý¾ÝµØÖ· SPI_WriteByte(ADS1256_CMD_WREG | (regaddr & 0x0F)); //дÈëÊý¾ÝµÄ¸öÊýn-1 SPI_WriteByte(0x00); //ÏòregaddrµØÖ·Ö¸ÏòµÄ¼Ä´æÆ÷дÈëÊý¾Ýdatabyte SPI_WriteByte(databyte); delay_us(1); GPIO_SetBits(GPIOB, GPIO_Pin_6); } //³õʼ»¯ADS1256 void ADS1256_Init(void) { Init_ADS1256_GPIO(); GPIO_ResetBits(GPIOB, GPIO_Pin_7); delay_us(50); GPIO_SetBits(GPIOB, GPIO_Pin_7);//RESET delay_us(50); GPIO_ResetBits(GPIOB, GPIO_Pin_6);//CS ADS1256WREG(ADS1256_STATUS,0x06); // ¸ßλÔÚÇ°¡¢Ð£×¼¡¢Ê¹Óûº³å while(GPIO_ReadInputDataBit(GPIO_ADS1256DRDY_PORT,GPIO_ADS1256DRDY)); SPI_WriteByte(ADS1256_CMD_SELFCAL);//Æ«ÒÆÔöÒæ×ÔУ׼ // ADS1256WREG(ADS1256_MUX,0x08); // ³õʼ»¯¶Ë¿ÚA0Ϊ¡®+¡¯£¬AINCOMλ¡®-¡¯ // while(GPIO_ReadInputDataBit(GPIO_ADS1256DRDY_PORT,GPIO_ADS1256DRDY)); ADS1256WREG(ADS1256_ADCON,0); // ·Å´ó±¶Êý1 ADS1256WREG(ADS1256_DRATE,ADS1256_DRATE_15000SPS); // Êý¾Ý5sps ADS1256WREG(ADS1256_IO,0x00); GPIO_SetBits(GPIOB, GPIO_Pin_6); }
2019 8 9 STM32F407ADS1526连续转换模式相关配置(采样率达到15000SPS)
标签:sof inpu ssi print add spi typedef lock 数据
原文地址:https://www.cnblogs.com/calm-monkey/p/11369858.html