stm32_tm7705_ad7705_AD转换程序.docx

/*spi_tm7705.h*/#ifndef _SPI_TM7705_H#define _SPI_TM7705_H#include stm32f10x.h#include SysTick.h/* 片选信号，拉低为选中 */#define CS1_LOW() GPIO_ResetBits(GPIOA, GPIO_Pin_4)#define CS1_HIGH() GPIO_SetBits(GPIOA, GPIO_Pin_4)#define CS2_LOW() GPIO_ResetBits(GPIOB, GPIO_Pin_0)#define CS2_HIGH() GPIO_SetBits(GPIOB, GPIO_Pin_0)#define CS3_LOW() GPIO_ResetBits(GPIOB, GPIO_Pin_1)#define CS3_HIGH() GPIO_SetBits(GPIOB, GPIO_Pin_1)#define CS4_LOW() GPIO_ResetBits(GPIOB, GPIO_Pin_5)#define CS4_HIGH() GPIO_SetBits(GPIOB, GPIO_Pin_5)/* DRDY拉低为可以读取*/#define DRDY1_LOW()GPIO_ReadInputDataBit(GPIOB, GPIO_Pin_12)#define DRDY2_LOW()GPIO_ReadInputDataBit(GPIOB, GPIO_Pin_13)#define DRDY3_LOW()GPIO_ReadInputDataBit(GPIOB, GPIO_Pin_14)#define DRDY4_LOW()GPIO_ReadInputDataBit(GPIOB, GPIO_Pin_15)void SPI_TM7705_Init(void);u8 SPI1_ReadWriteByte(u8 TxData);void TM7705_Init(void);void ReadAD(void);#endif /* _SPI_TM7705_H */*spi_tm7705.h*/*spi_tm7705.c*/* * * 文件名 ：spi_tm7705.c * 描述 ：spi_tm7705底层应用函数库 * 实验平台： * 硬件连接 - * * PA5-SPI1-SCK : CLK * PA6-SPI1-MISO : DOUT * PA7-SPI1-MOSI : DIN * *PA4:CS1 * PB0 : CS2 * PB1 : CS3 * PB5 : CS4 * * PB12 : DRDY1 * PB13 : DRDY2 * PB14 : DRDY3 * PB15 : DRDY4 * - * 库版本 ：ST3.0.0 */#include spi_tm7705.hu16 ADResult4;/存储AD结果的数组/*初始化SPI1与tm7705的接口*/void SPI_TM7705_Init(void) SPI_InitTypeDef SPI_InitStructure; GPIO_InitTypeDef GPIOA_InitStructure; GPIO_InitTypeDef GPIOB_InitStructure; /* 配置外设时钟 */ /*! SPI_FLASH_SPI_CS_GPIO, SPI_FLASH_SPI_MOSI_GPIO, SPI_FLASH_SPI_MISO_GPIO, SPI_FLASH_SPI_DETECT_GPIO and SPI_FLASH_SPI_SCK_GPIO Periph clock enable */ RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB, ENABLE); /*! Periph clock enable */ RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1, ENABLE); /*! AFIO Periph clock enable */ RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE); /*! Configure SCK */ GPIOA_InitStructure.GPIO_Pin = GPIO_Pin_5 | GPIO_Pin_6 | GPIO_Pin_7; GPIOA_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIOA_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; GPIO_Init(GPIOA, &GPIOA_InitStructure);/ /*! Configure MISO */ GPIOA_InitStructure.GPIO_Pin = GPIO_Pin_6;/ GPIO_Init(GPIOA, &GPIOA_InitStructure);/ /*! Configure MOSI */ GPIOA_InitStructure.GPIO_Pin = GPIO_Pin_7;/ GPIO_Init(GPIOA, &GPIOA_InitStructure); /*! Configure CS1 */ GPIOB_InitStructure.GPIO_Pin = GPIO_Pin_4 ; GPIOB_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; GPIOB_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; /设置引脚速率为50MHZ GPIO_Init(GPIOA, &GPIOB_InitStructure); /*! Configure CS2,3,4 */ GPIOB_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_5; GPIOB_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; GPIOB_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; /设置引脚速率为50MHZ GPIO_Init(GPIOB, &GPIOB_InitStructure); /*! Configure DRDY1,2,3,4*/ GPIOB_InitStructure.GPIO_Pin = GPIO_Pin_12 | GPIO_Pin_13 | GPIO_Pin_14 | GPIO_Pin_15; GPIOB_InitStructure.GPIO_Mode = GPIO_Mode_IPU; GPIOB_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; /设置引脚速率为50MHZ GPIO_Init(GPIOB, &GPIOB_InitStructure); /* 将片选信号全部拉高 */ CS1_HIGH(); CS2_HIGH(); CS3_HIGH(); CS4_HIGH(); /* SPI1 configuration */ /设置SPI单向或者双向的数据模式:SPI设置为双线双向全双工 SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex; /设置SPI工作模式:设置为主SPI SPI_InitStructure.SPI_Mode = SPI_Mode_Master; /设置SPI的数据大小:SPI发送接收8位帧结构 SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b; /选择了串行时钟的稳态:时钟悬空高 SPI_InitStructure.SPI_CPOL = SPI_CPOL_High; /数据捕获于第二个时钟沿 SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge; /NSS信号由硬件（NSS管脚）还是软件（使用SSI位）管理:内部NSS信号有SSI位控制 SPI_InitStructure.SPI_NSS = SPI_NSS_Soft; /定义波特率预分频的值:波特率预分频值为256 SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_256; /flash读写中这里是4 /指定数据传输从MSB位还是LSB位开始:数据传输从MSB位开始 SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB; /CRC值计算的多项式 SPI_InitStructure.SPI_CRCPolynomial = 7; /根据SPI_InitStruct中指定的参数初始化外设SPIx寄存器 SPI_Init(SPI1, &SPI_InitStructure); /* Enable SPI1 */ SPI_Cmd(SPI1, ENABLE); /使能SPI外设 /*SPIx 读写一个字节 TxData:要写入的字节 返回值:读取到的字节*/ u8 SPI1_ReadWriteByte(u8 TxData) while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) = RESET); /检查指定的SPI标志位设置与否:发送缓存空标志位 /* Send byte through the SPI1 peripheral */ SPI_I2S_SendData(SPI1, TxData); /通过外设SPI1发送一个数据 /* Wait to receive a byte */ while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_RXNE) = RESET); /检查指定的SPI标志位设置与否:接受缓存非空标志 /* Return the byte read from the SPI bus */ return SPI_I2S_ReceiveData(SPI1); /返回通过SPIx最近接收的数据 /*tm7705初始化函数*/ void TM7705_Init(void) unsigned char i ; CS1_LOW();Delay_us(10);for(i = 0; i 100; i+) SPI1_ReadWriteByte(0xFF); /持续DIN高电平写操作，恢复tm7705接口 SPI1_ReadWriteByte(0x20) ; /通道1 ,下一个写时钟寄存器 /*2016.1.21实地测试通过*SPI1_ReadWriteByte(0x08) ; /写时钟寄存器设置更新速率为60Hz，使用内部时钟 */SPI1_ReadWriteByte(0x08) ;SPI1_ReadWriteByte(0x10) ; /通道1 ,下一个写设置寄存器 /*2016.1.21实地测试通过*SPI1_ReadWriteByte(0x70) ; /写设置寄存器 ,设置成双极性、无缓冲、增益为2、滤波器不工作、自校准*/SPI1_ReadWriteByte(0x70);Delay_us(10);CS1_HIGH();CS2_LOW();Delay_us(10);for(i = 0; i 100; i+) SPI1_ReadWriteByte(0xFF); /持续DIN高电平写操作，恢复tm7705接口1415 /SPI1_ReadWriteByte(0x20) ; /通道1 ,下一个写时钟寄存器 /SPI1_ReadWriteByte(0x09) ; /写时钟寄存器设置更新速率为60Hz，使用内部时钟 /SPI1_ReadWriteByte(0x10) ; /通道1 ,下一个写设置寄存器 /SPI1_ReadWriteByte(0x78) ; /写设置寄存器 ,设置成双极性、无缓冲、增益为0、滤波器不工作、自校准SPI1_ReadWriteByte(0x20) ; /通道1 ,下一个写时钟寄存器 SPI1_ReadWriteByte(0x08) ; /写时钟寄存器设置更新速率为60Hz，使用内部时钟 SPI1_ReadWriteByte(0x10) ; /通道1 ,下一个写设置寄存器 SPI1_ReadWriteByte(0x70) ;Delay_us(10);CS2_HIGH();CS3_LOW();Delay_us(10);for(i = 0; i 100; i+) SPI1_ReadWriteByte(0xFF); /持续DIN高电平写操作，恢复tm7705接口 SPI1_ReadWriteByte(0x20) ; /通道1 ,下一个写时钟寄存器 SPI1_ReadWriteByte(0x08) ; /写时钟寄存器设置更新速率为60Hz，使用内部时钟 SPI1_ReadWriteByte(0x10) ; /通道1 ,下一个写设置寄存器 SPI1_ReadWriteByte(0x70) ; /写设置寄存器 ,设置成双极性、无缓冲、增益为0、滤波器不工作、自校准Delay_us(10);CS3_HIGH();CS4_LOW();Delay_us(10);for(i = 0; i 2) break; i=0; if(DRDY1_LOW()=0) CS1_LOW(); Delay_us(10); SPI1_ReadWriteByte(0x38);/command for the comm to read data register for channel 1 (dec 56) /read 16bit of data ADC highByte = SPI1_ReadWriteByte(0xFF); lowByte = SPI1_ReadWriteByte(0xFF); adcValue = highByte 2) break; i=0; if(DRDY2_LOW()=0) CS2_LOW(); Delay_us(10); SPI1_ReadWriteByte(0x38);/command for the comm to read data register for channel 1 (dec 56) /read 16bit of data ADC highByte = SPI1_ReadWriteByte(0xFF); lowByte = SPI1_ReadWriteByte(0xFF); adcValue