stm32_tm7705_ad7705_AD轉(zhuǎn)換程序

1、/*spi_tm7705.h*/#ifndef _SPI_TM7705_H#define _SPI_TM7705_H#include "stm32f10x.h"#include "SysTick.h"/* 片選信號，拉低為選中 */#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_

2、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拉低為可以讀取*/#define DRDY1_LOW()GPIO_ReadInputDataBit(GPI

3、OB, 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);#en

4、dif /* _SPI_TM7705_H */*spi_tm7705.h*/*spi_tm7705.c*/* * * 文件名 ：spi_tm7705.c * 描述 ：spi_tm7705底層應(yīng)用函數(shù)庫 * 實驗平臺： * 硬件連接 - * * 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 * - *

5、 庫版本 ：ST3.0.0 */#include "spi_tm7705.h"u16 ADResult4;/存儲AD結(jié)果的數(shù)組/*初始化SPI1與tm7705的接口*/void SPI_TM7705_Init(void) SPI_InitTypeDef SPI_InitStructure; GPIO_InitTypeDef GPIOA_InitStructure; GPIO_InitTypeDef GPIOB_InitStructure; /* 配置外設(shè)時鐘 */ /*!< SPI_FLASH_SPI_CS_GPIO, SPI_FLASH_SPI_MOSI_GPIO,

6、 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 */ R

7、CC_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);/ /*!< C

8、onfigure 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_InitS

9、tructure.GPIO_Mode = GPIO_Mode_Out_PP; GPIOB_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; /設(shè)置引腳速率為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; GPIO

10、B_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; /設(shè)置引腳速率為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

11、 = GPIO_Speed_50MHz; /設(shè)置引腳速率為50MHZ GPIO_Init(GPIOB, &GPIOB_InitStructure); /* 將片選信號全部拉高 */ CS1_HIGH(); CS2_HIGH(); CS3_HIGH(); CS4_HIGH(); /* SPI1 configuration */ /設(shè)置SPI單向或者雙向的數(shù)據(jù)模式:SPI設(shè)置為雙線雙向全雙工 SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex; /設(shè)置SPI工作模式:設(shè)置為主SPI SPI_InitStruct

12、ure.SPI_Mode = SPI_Mode_Master; /設(shè)置SPI的數(shù)據(jù)大小:SPI發(fā)送接收8位幀結(jié)構(gòu) SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b; /選擇了串行時鐘的穩(wěn)態(tài):時鐘懸空高 SPI_InitStructure.SPI_CPOL = SPI_CPOL_High; /數(shù)據(jù)捕獲于第二個時鐘沿 SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge; /NSS信號由硬件（NSS管腳）還是軟件（使用SSI位）管理:內(nèi)部NSS信號有SSI位控制 SPI_InitStructure.SPI_NSS =

13、 SPI_NSS_Soft; /定義波特率預(yù)分頻的值:波特率預(yù)分頻值為256 SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_256; /flash讀寫中這里是4 /指定數(shù)據(jù)傳輸從MSB位還是LSB位開始:數(shù)據(jù)傳輸從MSB位開始 SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB; /CRC值計算的多項式 SPI_InitStructure.SPI_CRCPolynomial = 7; /根據(jù)SPI_InitStruct中指定的參數(shù)初始化外設(shè)SPIx寄存器 SPI_I

14、nit(SPI1, &SPI_InitStructure); /* Enable SPI1 */ SPI_Cmd(SPI1, ENABLE); /使能SPI外設(shè) /*SPIx 讀寫一個字節(jié) TxData:要寫入的字節(jié) 返回值:讀取到的字節(jié)*/ u8 SPI1_ReadWriteByte(u8 TxData) while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) = RESET); /檢查指定的SPI標志位設(shè)置與否:發(fā)送緩存空標志位 /* Send byte through the SPI1 peripheral */ SPI_I2S_

15、SendData(SPI1, TxData); /通過外設(shè)SPI1發(fā)送一個數(shù)據(jù) /* Wait to receive a byte */ while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_RXNE) = RESET); /檢查指定的SPI標志位設(shè)置與否:接受緩存非空標志 /* Return the byte read from the SPI bus */ return SPI_I2S_ReceiveData(SPI1); /返回通過SPIx最近接收的數(shù)據(jù) /*tm7705初始化函數(shù)*/ void TM7705_Init(void) unsigne

16、d char i ; CS1_LOW();Delay_us(10);for(i = 0; i < 100; i+) SPI1_ReadWriteByte(0xFF); /持續(xù)DIN高電平寫操作，恢復(fù)tm7705接口 SPI1_ReadWriteByte(0x20) ; /通道1 ,下一個寫時鐘寄存器 /*2016.1.21實地測試通過*SPI1_ReadWriteByte(0x08) ; /寫時鐘寄存器設(shè)置更新速率為60Hz，使用內(nèi)部時鐘 */SPI1_ReadWriteByte(0x08) ;SPI1_ReadWriteByte(0x10) ; /通道1 ,下一個寫設(shè)置寄存器 /*20

17、16.1.21實地測試通過*SPI1_ReadWriteByte(0x70) ; /寫設(shè)置寄存器 ,設(shè)置成雙極性、無緩沖、增益為2、濾波器不工作、自校準*/SPI1_ReadWriteByte(0x70);Delay_us(10);CS1_HIGH();CS2_LOW();Delay_us(10);for(i = 0; i < 100; i+) SPI1_ReadWriteByte(0xFF); /持續(xù)DIN高電平寫操作，恢復(fù)tm7705接口1415 /SPI1_ReadWriteByte(0x20) ; /通道1 ,下一個寫時鐘寄存器 /SPI1_ReadWriteByte(0x09)

18、 ; /寫時鐘寄存器設(shè)置更新速率為60Hz，使用內(nèi)部時鐘 /SPI1_ReadWriteByte(0x10) ; /通道1 ,下一個寫設(shè)置寄存器 /SPI1_ReadWriteByte(0x78) ; /寫設(shè)置寄存器 ,設(shè)置成雙極性、無緩沖、增益為0、濾波器不工作、自校準SPI1_ReadWriteByte(0x20) ; /通道1 ,下一個寫時鐘寄存器 SPI1_ReadWriteByte(0x08) ; /寫時鐘寄存器設(shè)置更新速率為60Hz，使用內(nèi)部時鐘 SPI1_ReadWriteByte(0x10) ; /通道1 ,下一個寫設(shè)置寄存器 SPI1_ReadWriteByte(0x70)

19、;Delay_us(10);CS2_HIGH();CS3_LOW();Delay_us(10);for(i = 0; i < 100; i+) SPI1_ReadWriteByte(0xFF); /持續(xù)DIN高電平寫操作，恢復(fù)tm7705接口 SPI1_ReadWriteByte(0x20) ; /通道1 ,下一個寫時鐘寄存器 SPI1_ReadWriteByte(0x08) ; /寫時鐘寄存器設(shè)置更新速率為60Hz，使用內(nèi)部時鐘 SPI1_ReadWriteByte(0x10) ; /通道1 ,下一個寫設(shè)置寄存器 SPI1_ReadWriteByte(0x70) ; /寫設(shè)置寄存器 ,

20、設(shè)置成雙極性、無緩沖、增益為0、濾波器不工作、自校準Delay_us(10);CS3_HIGH();CS4_LOW();Delay_us(10);for(i = 0; i < 100; i+) SPI1_ReadWriteByte(0xFF); /持續(xù)DIN高電平寫操作，恢復(fù)tm7705接口 SPI1_ReadWriteByte(0x20) ; /通道1 ,下一個寫時鐘寄存器 SPI1_ReadWriteByte(0x08) ; /寫時鐘寄存器設(shè)置更新速率為60Hz，使用內(nèi)部時鐘 SPI1_ReadWriteByte(0x10) ; /通道1 ,下一個寫設(shè)置寄存器 SPI1_ReadWr

21、iteByte(0x70) ; /寫設(shè)置寄存器 ,設(shè)置成雙極性、無緩沖、增益為0、濾波器不工作、自校準Delay_us(10);CS4_HIGH(); /*讀數(shù)*/void ReadAD(void)/ char DataNotReady = 0x80; char highByte; char lowByte; u16 adcValue; float adcValue1; int ret; int i=0; /TM7705_Init(); Delay_us(10); /ad1 while(DRDY1_LOW()=1) i+=1; Delay_ms(50); if (i>2) break;

22、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 << 8; adcValue = adcValue | lowByte;

23、/*2016.1.21實地測試通過* *adcValue1=(float)adcValue/65535*1.225; *ret=(int)(adcValue1*1000); */ adcValue1=(float)adcValue/3; ret=(int)(adcValue1); ADResult0=ret; Delay_us(10); CS1_HIGH(); /ad2 while(DRDY2_LOW()=1) i+=1; Delay_ms(50); if (i>2) break; i=0; if(DRDY2_LOW()=0) CS2_LOW(); Delay_us(10); SPI1_

24、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 << 8; adcValue = adcValue | lowByte; adcValue1=(float)adcValue/3; ret=(int)(adcValue1); ADResult1=ret; Delay_us(10); CS2_HIGH(); /ad3 while(DRDY3_LOW()=1) i+=1; Delay_ms(50); if (i>2) break; i=0; if(DRDY3_LOW()=0) CS3_LOW(); Delay_us(10); S