pmod ad2 digilent 提供的pmodad2.c和pmodad2.h

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PmodAD2.h

/******************************************************************************/
/*                                                                            */
/* PmodAD2.h -- Driver definitions for the PmodAD2                            */
/*                                                                            */
/******************************************************************************/
/* File Description:                                                          */
/*                                                                            */
/* This file contains the drivers for the PmodAD2 IP from Digilent            */
/*                                                                            */
/******************************************************************************/
/* Revision History:                                                          */
/*                                                                            */
/*    06/13/2016(artvvb):   Created                                           */
/*    08/21/2017(artvvb):   Validated for Vivado 2015.4                       */
/*    02/10/2018(atangzwj): Validated for Vivado 2017.4                       */
/*                                                                            */
/******************************************************************************/#ifndef PMODAD2_H
#define PMODAD2_H/****************** Include Files ********************/
#include "xiic.h"
#include "xiic_l.h"
#include "xil_types.h"
#include "xparameters.h"
#include "xstatus.h"/* ------------------------------------------------------------ */
/*                  Definitions                                 */
/* ------------------------------------------------------------ */#define AD2_IIC_ADDR 0x28/* ------------------------------------------------------------ */
/*                  Bit Mask Definitions                        */
/* ------------------------------------------------------------ */#define AD2_CONFIG_CH3             0x80
#define AD2_CONFIG_CH2             0x40
#define AD2_CONFIG_CH1             0x20
#define AD2_CONFIG_CH0             0x10
#define AD2_CONFIG_REF_SEL         0x08
#define AD2_CONFIG_FLTR            0x04
#define AD2_CONFIG_BIT_TRIAL_DELAY 0x02
#define AD2_CONFIG_SAMPLE_DELAY    0x01#define AD2_DEFAULT_CONFIG (AD2_CONFIG_CH0 | AD2_CONFIG_CH1 | AD2_CONFIG_CH2 \| AD2_CONFIG_CH3)#define AD2_DATA_MASK    0xFFF
#define AD2_CHANNEL_BIT  12
#define AD2_CHANNEL_MASK 0x3000/* ------------------------------------------------------------ */
/*                  Procedure Declarations                      */
/* ------------------------------------------------------------ */typedef struct PmodAD2 {XIic AD2Iic;u8 chipAddr;
} PmodAD2;void AD2_begin(PmodAD2 *InstancePtr, u32 IIC_Address, u8 Chip_Address);
XStatus AD2_IICInit(XIic *IicInstancePtr);XStatus AD2_ReadConv(PmodAD2 *InstancePtr, u16 *dataPtr);
XStatus AD2_WriteConfig(PmodAD2 *InstancePtr, u8 configuration);#endif // PMODAD2_H

PmodAD2.c

/******************************************************************************/
/*                                                                            */
/* PmodAD2.c -- Driver source for the PmodAD2                                 */
/*                                                                            */
/******************************************************************************/
/* File Description:                                                          */
/*                                                                            */
/* This file contains the drivers for the PmodAD2 IP from Digilent            */
/*                                                                            */
/******************************************************************************/
/* Revision History:                                                          */
/*                                                                            */
/*    06/13/2016(artvvb):   Created                                           */
/*    08/21/2017(artvvb):   Validated for Vivado 2015.4                       */
/*    02/10/2018(atangzwj): Validated for Vivado 2017.4                       */
/*                                                                            */
/******************************************************************************//***************************** Include Files *******************************/#include "PmodAD2.h"/************************** Function Definitions ***************************/XIic_Config AD2_Config =
{0,0,0,2
};/* ------------------------------------------------------------ */
/*** void AD2_begin(PmodAD2 *InstancePtr, u32 IIC_Address)
**
**   Parameters:
**      InstancePtr:  A PmodAD2 device to start
**      IIC_Address:  The base address of the PmodAD2 AXI IIC
**      Chip_Address: 7 bit Pmod IIC device address
**
**   Return Value:
**      none
**
**   Description:
**      Initializes the PmodAD2 device
*/
void AD2_begin(PmodAD2 *InstancePtr, u32 IIC_Address, u8 Chip_Address) {AD2_Config.BaseAddress = IIC_Address;InstancePtr->chipAddr = Chip_Address;AD2_IICInit(&InstancePtr->AD2Iic);XIic_SetAddress(&InstancePtr->AD2Iic, XII_ADDR_TO_SEND_TYPE,InstancePtr->chipAddr);
}/* ------------------------------------------------------------ */
/*** AD2_IICInit
**
**   Parameters:
**      IicInstancePtr: PmodAD2 AXI IIC device to initialize
**
**   Return Value:
**      Success or failure status
**
**   Description:
**      Initializes the PmodAD2 AXI IIC device
*/
XStatus AD2_IICInit(XIic *IicInstancePtr) {int Status;Status = XIic_CfgInitialize(IicInstancePtr, &AD2_Config,AD2_Config.BaseAddress);if (Status != XST_SUCCESS) {return Status;}// Start the IIC driver so that the device is enabled.XIic_Start(IicInstancePtr);// Disable Global interrupt to use polled mode operationXIic_IntrGlobalDisable(IicInstancePtr);return XST_SUCCESS;
}/* ------------------------------------------------------------ */
/*** XStatus AD2_ReadConv(PmodAD2 *InstancePtr, u16 *dataPtr)
**
**   Parameters:
**      InstancePtr: PmodAD2 device to initialize
**      dataPtr:     Pointer to return data address
**
**   Return Value:
**      Success or failure status
**      Conversion result and channel number at dataPtr
**
**   Description:
**      Reads 2 data bytes from conversion register
*/
XStatus AD2_ReadConv(PmodAD2 *InstancePtr, u16 *dataPtr) {int Status;u8 buf[2];Status = XIic_Start(&InstancePtr->AD2Iic);if (Status != XST_SUCCESS) {return Status;}XIic_Recv(InstancePtr->AD2Iic.BaseAddress, InstancePtr->chipAddr, buf, 2,XIIC_STOP);*dataPtr = (buf[0] << 8) | buf[1];Status = XIic_Stop(&InstancePtr->AD2Iic);if (Status != XST_SUCCESS) {return Status;}return XST_SUCCESS;
}/* ------------------------------------------------------------ */
/*** XStatus AD2_WriteConfig(PmodAD2 *InstancePtr, u8 configuration)
**
**   Parameters:
**      InstancePtr:   PmodAD2 device to initialize
**      configuration: Value to load into the AD2 configuration register
**                     Bit definitions are defined as AD2_CONFIG_* in PmodAD2.h
**
**   Return Value:
**      Success or failure status
**
**   Description:
**      Writes the configuration into the AD2 config register
*/
XStatus AD2_WriteConfig(PmodAD2 *InstancePtr, u8 configuration) {int Status;Status = XIic_Start(&InstancePtr->AD2Iic);if (Status != XST_SUCCESS) {return Status;}XIic_Send(InstancePtr->AD2Iic.BaseAddress, InstancePtr->chipAddr,&configuration, 1, XIIC_STOP);Status = XIic_Stop(&InstancePtr->AD2Iic);return Status;
}

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