ADS1292驱动程序 STM32 2020省TI杯电赛资料

/*ADS1292R驱动程序*/ #include"ADS1292R.H" /**初始化ADS1292R**/ void ADS_Init(void) { GPIO_InitTypeDef GPIO_InitStructure; SPI_InitTypeDef SPI_InitStructure; NVIC_InitTypeDef NVIC_InitStructure; EXTI_InitTypeDef EXTI_InitStructure; /*ADS1292用到的IO口初始化*/ GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;//最高输出速率50MHz GPIO_InitStructure.GPIO_Pin = ADS_PWDN; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;//推挽输出 GPIO_Init(ADS_PWDN_G, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;//最高输出速率50MHz GPIO_InitStructure.GPIO_Pin = ADS_GPIO2; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;//复用推挽输出 GPIO_Init(ADS_GPIO2_G, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;//最高输出速率50MHz GPIO_InitStructure.GPIO_Pin = ADS_DRDY; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;//浮空输入 GPIO_Init(ADS_DRDY_G, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;//最高输出速率50MHz GPIO_InitStructure.GPIO_Pin = ADS_CS; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;//推挽输出 GPIO_Init(ADS_CS_G, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;//最高输出速率50MHz GPIO_InitStructure.GPIO_Pin = ADS_SCLK; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;//复用推挽输出 GPIO_Init(ADS_SCLK_G, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;//最高输出速率50MHz GPIO_InitStructure.GPIO_Pin = ADS_DOUT; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;//浮空输入 GPIO_Init(ADS_DOUT_G, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;//最高输出速率50MHz GPIO_InitStructure.GPIO_Pin = ADS_DIN; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;//复用推挽输出 GPIO_Init(ADS_DIN_G, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;//最高输出速率50MHz GPIO_InitStructure.GPIO_Pin = ADS_START; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;//推挽输出 GPIO_Init(ADS_START_G, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;//最高输出速率50MHz GPIO_InitStructure.GPIO_Pin = ADS_GPIO1; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;//复用推挽输出 GPIO_Init(ADS_GPIO1_G, &GPIO_InitStructure); /*SPI接口初始化*/ SPI_Cmd(SPI1,DISABLE); SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex; //双线双向全双工 SPI_InitStructure.SPI_Mode = SPI_Mode_Master;//SPI主模式 SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;//8bit数据 SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low;//CLK空闲时为高电平 SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge;//数据捕获于第二个时钟沿 SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;//片选用软件控制 SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_8;//SPI频率 SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;//高位在前 SPI_InitStructure.SPI_CRCPolynomial = 7;//crc7，stm32spi带硬件ecc SPI_Init(SPI1, &SPI_InitStructure); SPI_Cmd(SPI1,ENABLE); /*DRDY中断接收初始化 NVIC_InitStructure.NVIC_IRQChannel = EXTI3_IRQn;//选择中断通道3 NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;//抢占式中断优先级设置为1 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;//响应式中断优先级设置为1 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;//使能中断 NVIC_Init(&NVIC_InitStructure); EXTI_ClearITPendingBit(EXTI_Line3);//清除中断标志 GPIO_EXTILineConfig(GPIO_PortSourceGPIOA, GPIO_PinSource3);//选择管教 EXTI_InitStructure.EXTI_Line = EXTI_Line3; //选择中断线路3 EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt; //设置为中断请求，非事件请求 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising; //Falling设置中断触发方式为下降沿触发 EXTI_InitStructure.EXTI_LineCmd = ENABLE;//外部中断使能 EXTI_Init(&EXTI_InitStructure);*/ } /**ADS1292R上电复位 **/ void ADS_PowerOnInit(void) { unsigned char sj[9]; ADS_START_H; ADS_CS_H; ADS_PWDN_L;//进入掉电模式 delay_ms(1000); ADS_PWDN_H;//退出掉电模式 delay_ms(1000);//等待稳定 ADS_PWDN_L;//发出复位脉冲 delay_us(10); ADS_PWDN_H; delay_ms(1000);//等待稳定，可以开始使用ADS1292R ADS_START_L; ADS_CS_L; ADS_SPI(SDATAC);//发送停止连续读取数据命令 ADS_REG(WREG|CONFIG2,0XA0); //使用内部参考电压 delay_ms(10);//等待内部参考电压稳定 ADS_REG(WREG|CONFIG1,0X02); //设置转换速率为500SPS ADS_REG(WREG|CH1SET,0X01); //设置通道1为短路 ADS_REG(WREG|CH2SET,0X01); //设置通道2为短路 sj[1]=ADS_REG(RREG|CONFIG1,0X00); sj[2]=ADS_REG(RREG|CH1SET,0X00); sj[3]=ADS_REG(RREG|CH2SET,0X00); printf("%X ",sj[1]); printf("%X ",sj[2]); printf("%X \n",sj[3]); /* ADS_SPI(RDATAC);//回到连续读取数据模式，检测噪声数据 ADS_START_H;//启动转换 while(GPIO_ReadInputDataBit(ADS_DRDY_G,ADS_DRDY)==SET); ADS_Read(sj); ADS_START_L; ADS_SPI(SDATAC); ADS_REG(WREG|CONFIG2,0XA0); ADS_REG(WREG|CH1SET,0X80); ADS_REG(WREG|CH2SET,0X00); ADS_SPI(RDATAC); ADS_START_H; */ } /**对ADS1292R内部寄存器进行操作 **/ unsigned char ADS_REG(unsigned char com,unsigned data) { unsigned char i; for(i=0;i<45;i++); ADS_SPI(com); for(i=0;i<45;i++); ADS_SPI(0X00); for(i=0;i<45;i++); if((com&0x20)==0x20)//判断是否为读寄存器指令 { ADS_SPI(0X00); for(i=0;i<45;i++); } return (ADS_SPI(data)); } /**通过SPI总线与ADS1292R通信**/ unsigned char ADS_SPI(unsigned char com) { while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET);//检测发送寄存器是否为空，上一个数据发送完成 SPI_I2S_SendData(SPI1, com);//发送数据 while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_RXNE) == RESET);//检测接收标志是否非空，发送完成 return (SPI_I2S_ReceiveData(SPI1)); //返回接收到的数据 } /*读取72位的数据1100+LOFF_STAT[4:0]+GPIO[1:0]+13个0+2CHx24位，共9字节*/ void ADS_Read(unsigned char *data) { unsigned char i; for(i=0;i<9;i++) { *data=ADS_SPI(0X00); data++; } }