TI中文支持网用的SPI2与ADS1248相连
ADS1248WREG(ADS1248_REG_MUX0,0x01); //00100101,Bit7-6:传感器电流源检测不使用，Bit5-3:正输入为AIN0，Bit2-0:负输入为AIN1
delay_ms(20);
ADS1248WREG(ADS1248_REG_MUX1,0x30); //00110000,Bit7：启用内部晶振，Bit6-5:内部基准一直打开，Bit4-3:输入基准为片上基准，Bit2-0:普通模式
delay_ms(20);
ADS1248WREG(ADS1248_REG_VBIAS,0); //00000000,Bit7-0:偏置电压选择关闭（默认）
delay_ms(20);
ADS1248WREG(ADS1248_REG_IDAC1,0xFF);//11111111,Bit7-4:断开内部第一恒流源的连接，Bit3-0:断开内部第二恒流源的连接 0X8F打开第一内部恒流源
delay_ms(20);
ADS1248WREG(ADS1248_REG_IDAC0,0x00); //00001000,Bit7-4:只读，Bit3:DRDY/DOUT功能复用Dout线 ，Bit2-0:关闭内部恒流源
delay_ms(20);
q=ADS1248RREG(ADS1248_REG_IDAC1);
printf("4d%x",q);
ADS1248WREG(ADS1248_REG_SYS0,0x09); //00000000，Bit7:必须设置为0，Bit6-41：选择128倍增益，Bit3-0：选择2000SPS测量速度 delay_ms(20);
4d 后面回的指令都是对的
Van Yang：
你试试内部的测试信号能否正常读出，原理图能不能看看
lingming kong：
回复 Van Yang:
内部测试信号怎么测试？额，原理图这个我是直接接的实物，用的是F4的SPI2的四个脚和ADS1248连接，START和REST接的是另外两个脚，之前将DSRY做中断，后来直接在while里面直接读AD值
Van Yang：
回复 lingming kong:
System Monitors里的测试信号，可以配置。
lingming kong：
回复 Van Yang:
#include "stm32f4xx.h"
#include "ADS1248.h"#include "delay.h"u8 results1,results2,results3;u32 D;char q;void SPI_ADS1248_Init(void){SPI_InitTypeDef SPI_InitStruct; GPIO_InitTypeDef GPIO_InitStructure;RCC_AHB1PeriphClockCmd(Open_SPIx_SCK_GPIO_CLK | Open_SPIx_MISO_GPIO_CLK | Open_SPIx_MOSI_GPIO_CLK,ENABLE);Open_SPIx_CLK_INIT(RCC_APB1Periph_SPI2,ENABLE);GPIO_PinAFConfig(Open_SPIx_SCK_GPIO_PORT, Open_SPIx_SCK_SOURCE, Open_SPIx_MOSI_AF);GPIO_PinAFConfig(Open_SPIx_MISO_GPIO_PORT, Open_SPIx_MISO_SOURCE, Open_SPIx_MOSI_AF);GPIO_PinAFConfig(Open_SPIx_MOSI_GPIO_PORT, Open_SPIx_MOSI_SOURCE, Open_SPIx_MOSI_AF);GPIO_InitStructure.GPIO_Pin = Open_SPIx_SCK_PIN;GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_DOWN; GPIO_Init(Open_SPIx_SCK_GPIO_PORT, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = Open_SPIx_MISO_PIN;GPIO_Init(Open_SPIx_MISO_GPIO_PORT, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = Open_SPIx_MOSI_PIN;GPIO_Init(Open_SPIx_MOSI_GPIO_PORT, &GPIO_InitStructure);
SPI_I2S_DeInit(Open_SPIx);SPI_InitStruct.SPI_Direction= SPI_Direction_2Lines_FullDuplex;SPI_InitStruct.SPI_DataSize = SPI_DataSize_8b; SPI_InitStruct.SPI_Mode = SPI_Mode_Master;SPI_InitStruct.SPI_CPOL = SPI_CPOL_Low;SPI_InitStruct.SPI_CPHA = SPI_CPHA_2Edge;SPI_InitStruct.SPI_NSS = SPI_NSS_Soft ;SPI_InitStruct.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_256;SPI_InitStruct.SPI_FirstBit = SPI_FirstBit_MSB;SPI_InitStruct.SPI_CRCPolynomial = 7;SPI_Init(Open_SPIx, &SPI_InitStruct);
SPI_Cmd(Open_SPIx, ENABLE);
}
/******************************************************************************** Function Name : SPI_FLASH_SendByte* Description : Sends a byte through the SPI interface and return the byte* received from the SPI bus.* Input : byte : byte to send.* Output : None* Return : The value of the received byte.*******************************************************************************/u8 SPI_ADS1248_SendByte(u8 byte){/* Loop while DR register in not emplty */while (SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_TXE) == RESET);
/* Send byte through the SPI1 peripheral */SPI_I2S_SendData(SPI2, byte);
/* Wait to receive a byte */while (SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_RXNE) == RESET);
/* Return the byte read from the SPI bus */return SPI_I2S_ReceiveData(SPI2);}/*******************************************************************函数名：初始化DAC接口函数原型：void ADC_gpio_init()参数说明：无返回： 无********************************************************************/void ADS1248_GPIO_init(void){GPIO_InitTypeDef GPIO_InitStructure;
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA , ENABLE);GPIO_InitStructure.GPIO_Pin= ADS_RESET ;GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; //–推免输出模式GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz; //–GPIO翻转速度为50MHz
GPIO_Init(GPIOA , &GPIO_InitStructure); //–将配置写入对应的GPIO寄存器中RCC_AHBxPeriphClockCmd(RCC_GPIO_CS,ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_PIN_CS;GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;GPIO_Init(GPIO_CS_PORT, &GPIO_InitStructure); }
//—————————————————————–//// 功 能：ADS1248 写数据// 入口参数: /// 出口参数: /// 全局变量: /// 备 注: 向ADS1248中地址为regaddr的寄存器写入一个字节databyte//—————————————————————–//
void ADS1248WREG(unsigned char regaddr,unsigned char databyte){SPI_ADS1248_SendByte(ADS1248_CMD_WREG+(regaddr & 0xF));
SPI_ADS1248_SendByte(0);
SPI_ADS1248_SendByte(databyte);}//—————————————————————–//// 功 能：ADS1248 读数据// 入口参数: /// 出口参数: /// 全局变量: /// 备 注: 从ADS1248中地址为regaddr的寄存器读出一个字节databyte//—————————————————————–//
unsigned char ADS1248RREG(unsigned char regaddr){
unsigned char r=0;
SPI_ADS1248_SendByte(ADS1248_CMD_RREG+(regaddr & 0xF));
SPI_ADS1248_SendByte(0);
r=SPI_ADS1248_SendByte(ADS1248_CMD_NOP);
return r;}//—————————————————————–//// 功 能：ADS1248初始化子程序// 入口参数: /// 出口参数: /// 全局变量: /// 备 注: ///—————————————————————–//void InitADS1248(void){
START_0;//发送复位命令RESET_0;delay_ms(10);RESET_1; delay_ms(20);ADS1248WREG(ADS1248_REG_MUX0,0x01);
delay_ms(20);ADS1248WREG(ADS1248_REG_MUX1,0x30);
delay_ms(20);
ADS1248WREG(ADS1248_REG_VBIAS,0);
delay_ms(20);ADS1248WREG(ADS1248_REG_IDAC1,0xFF);delay_ms(20);ADS1248WREG(ADS1248_REG_IDAC0,0x00); delay_ms(20);q=ADS1248RREG(ADS1248_REG_MUX1);printf("4d%x",q);ADS1248WREG(ADS1248_REG_SYS0,0x01); delay_ms(20);}
void Ads1248(void){ D=0;
SPI_ADS1248_SendByte(ADS1248_CMD_RDATAC);results1=SPI_ADS1248_SendByte(0xFF);results2=SPI_ADS1248_SendByte(0xFF);results3=SPI_ADS1248_SendByte(0xFF);D|=results1<<16|results2<<8|results3;
SPI_ADS1248_SendByte(ADS1248_CMD_NOP);}void START_test(void){START_1;delay_us(800);// delay_ms(7);START_0;
}
void NVIC_Configuration(void){ GPIO_InitTypeDef GPIO_InitStructure;EXTI_InitTypeDef EXTI_InitStructure; NVIC_InitTypeDef NVIC_InitStructure;RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOE, ENABLE);RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG,ENABLE);GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4;GPIO_Init(GPIOE,&GPIO_InitStructure);
SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOE, EXTI_PinSource4);
EXTI_InitStructure.EXTI_Line = EXTI_Line4; //–外部中断线,使用第1根EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt; //–中断模式EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling; //–上升沿触发模式EXTI_InitStructure.EXTI_LineCmd = ENABLE; //–打开中断EXTI_Init(&EXTI_InitStructure); //–写入对应寄存器中
// 使能外部中断，并配置优先级// EXTI_Trigger_Falling EXTI_Trigger_RisingNVIC_InitStructure.NVIC_IRQChannel =EXTI4_IRQn; //–第1个引脚,所以使用1通道NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;//–设置中断优先级为1NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1; //–设置子优先级为1NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //–启用通道NVIC_Init(&NVIC_InitStructure);
}
#ifndef _ADS1248_H#define _ADS1248_H
#include <stdio.h>#include "stm32f4xx.h"
/*** @brief Definition for connected to I2C1*//* SPIx Communication boards Interface */// SPI1 MISO (PA6) MOSI(PA7) CLK(PA5) NSS(PA4)
#define Open_SPIx SPI2#define Open_SPIx_CLK RCC_APB1Periph_SPI2#define Open_SPIx_CLK_INIT RCC_APB1PeriphClockCmd#define Open_SPIx_IRQn SPI2_IRQn#define Open_SPIx_IRQHANDLER SPI2_IRQHandler
#define Open_SPIx_SCK_PIN GPIO_Pin_13#define Open_SPIx_SCK_GPIO_PORT GPIOB#define Open_SPIx_SCK_GPIO_CLK RCC_AHB1Periph_GPIOB#define Open_SPIx_SCK_SOURCE GPIO_PinSource13#define Open_SPIx_SCK_AF GPIO_AF_SPI2
#define Open_SPIx_MISO_PIN GPIO_Pin_14#define Open_SPIx_MISO_GPIO_PORT GPIOB#define Open_SPIx_MISO_GPIO_CLK RCC_AHB1Periph_GPIOB#define Open_SPIx_MISO_SOURCE GPIO_PinSource14#define Open_SPIx_MISO_AF GPIO_AF_SPI2
#define Open_SPIx_MOSI_PIN GPIO_Pin_15#define Open_SPIx_MOSI_GPIO_PORT GPIOB#define Open_SPIx_MOSI_GPIO_CLK RCC_AHB1Periph_GPIOB#define Open_SPIx_MOSI_SOURCE GPIO_PinSource15#define Open_SPIx_MOSI_AF GPIO_AF_SPI2
/******************ads1248引脚设置*******************/#define ADS_RESET GPIO_Pin_1#define ADS_START GPIO_Pin_2#define ADS_DRDY GPIO_ReadInputDataBit(GPIOE, GPIO_Pin_4)#define RESET_1 GPIO_SetBits(GPIOA, ADS_RESET) #define RESET_0 GPIO_ResetBits(GPIOA, ADS_RESET)
#define START_1 GPIO_SetBits(GPIOA, ADS_START)#define START_0 GPIO_ResetBits(GPIOA, ADS_START)
//#define SPI_ADS1248_CS_PIN GPIO_Pin_4 /* PC.05 */#define RCC_GPIO_CS RCC_AHB1Periph_GPIOB#define RCC_AHBxPeriphClockCmd RCC_AHB1PeriphClockCmd#define GPIO_PIN_CS GPIO_Pin_12#define GPIO_CS_PORT GPIOB
#define SPI_ADS1248_Enable GPIO_ResetBits(GPIO_CS_PORT,GPIO_PIN_CS);#define SPI_ADS1248_Disable GPIO_SetBits(GPIO_CS_PORT,GPIO_PIN_CS);/******************ads1248寄存器地址*******************/#define ADS1248_CMD_WAKEUP 0x00#define ADS1248_CMD_SLEEP 0x02#define ADS1248_CMD_SYNC 0x04#define ADS1248_CMD_RESET 0x06#define ADS1248_CMD_NOP 0xff#define ADS1248_CMD_RDATA 0x12#define ADS1248_CMD_RDATAC 0x14#define ADS1248_CMD_SDATAC 0x16#define ADS1248_CMD_RREG 0x20#define ADS1248_CMD_WREG 0x40
#define ADS1248_REG_MUX0 0x00#define ADS1248_REG_VBIAS 0x01#define ADS1248_REG_MUX1 0x02#define ADS1248_REG_SYS0 0x03#define ADS1248_REG_CFC0 0x04#define ADS1248_REG_CFC1 0x05#define ADS1248_REG_CFC2 0x06#define ADS1248_REG_FSC0 0x07#define ADS1248_REG_FSC1 0x08#define ADS1248_REG_FSC2 0x09#define ADS1248_REG_IDAC0 0x0a#define ADS1248_REG_IDAC1 0x0b#define ADS1248_REG_GPIOCFG 0x0c#define ADS1248_REG_GPIODIR 0x0d#define ADS1248_REG_GPIODAT 0x0e/******************ads1248测量通道选择*******************/#define Ads_1 0x07#define Ads_2 0x0f#define Ads_3 0x17#define Ads_4 0x1f#define Ads_5 0x27#define Ads_6 0x2f#define Ads_7 0x37extern u8 results1;extern u8 results2;extern u8 results3;extern u32 D; extern char q;void ADS1248_GPIO_init(void);void ADS1248WREG(unsigned char regaddr,unsigned char databyte);void InitADS1248(void);void Ads1248(void);void START_test(void);void SPI_ADS1248_Init(void);u8 SPI_ADS1248_SendByte(u8 byte);u8 SPI_ADS1248_Receivebyte(void);
那个你说的那个应该怎么配置？这是我的ADS1248的配置代码
