ADS8681.zip

#include "ADS8681.h" #include "spi.h" #include "delay.h" #include "usart.h" // 复位 void ADS8685_RST(){ AD_RST = 0; delay_ms(25); AD_RST = 1; delay_ms(25); } void ADS8685_Init(){ GPIO_InitTypeDef GPIO_InitStructure; RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE); //使能PB端口时钟 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10|GPIO_Pin_11|GPIO_Pin_12; //RVS RST CS GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; //推挽输出 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //IO口速度为50MHz GPIO_Init(GPIOB, &GPIO_InitStructure); //根据设定参数初始化GPIOB SPI2_Init(); ADS8685_RST(); } //写寄存器 void ADS8685_Write_Register(u8 Addr,u16 data) // 11010_00_<9-bit address>_<16-bit data> { u16 retry = 0; AD_CS = 0; while(AD_RVS){ retry++; if(retry>=0XFFFE) break; } SPI_ReadWriteByte(0xD0); SPI_ReadWriteByte(Addr); SPI_ReadWriteByte((data>>8)&0xff); SPI_ReadWriteByte(data&0xff); AD_CS = 1; } // 读寄存器 u16 ADS8685_Read_Register(u8 Addr) // 11001_xx_<9-bit address>_00000000_00000000 { u8 data1,data2; u8 retry = 0; AD_CS = 0; while(AD_RVS){ retry++; if(retry>=0Xf) break; } SPI_ReadWriteByte(0xC8); SPI_ReadWriteByte(Addr); SPI_ReadWriteByte(0x00); SPI_ReadWriteByte(0x00); AD_CS = 1; retry = 0; while(!AD_RVS){ retry++; if(retry>=0Xff) break; } AD_CS = 0; retry = 0; while(AD_RVS){ retry++; if(retry>=0Xff) break; } data1 = SPI_ReadWriteByte(0x00); data2 = SPI_ReadWriteByte(0x00); AD_CS = 1; return data1<<8 | data2; } // 读取ads8681采样值 u32 ADS8685_Read_ConversionData(){ u8 data1,data2; u8 retry = 0; AD_CS = 1; retry = 0; while(!AD_RVS){ retry++; if(retry>=0xff) break; } AD_CS = 0; retry = 0; while(AD_RVS){ retry++; if(retry>=0xff) break; } data1 = SPI_ReadWriteByte(0x00); data2 = SPI_ReadWriteByte(0x00); return data1<<8|data2; }