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#include "ads1120.h"
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#define uchar unsigned char
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#define uint unsigned int
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#define TEMGET 1
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#define PREGET 2
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unsigned char Init_Config[4];
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unsigned char i;
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//extern unsigned int Result;
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//unsigned int Result;
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#define MAXVALUE 32768
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#define TEM_K_FACTOR (1.5/8)
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#define PRE_K_FACTOR (2.048/16)
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/***************************************************************************
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* Function Name: ADS1120_Init()
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* Purpose: ADS120 initialize
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* Params :
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*
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*************************************************************************/
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void ADS1120_GPIO_Init(void)
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{
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GPIO_InitTypeDef GPIO_InitStructure;
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//´ò¿ª¿ØÖƶ˿ÚʱÖÓ
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB|RCC_APB2Periph_GPIOC|RCC_APB2Periph_GPIOE, ENABLE);
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//¿ØÖÆÒý½Å£¨Êä³ö£©³õʼ»¯
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPD;
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0; //A6 Miso
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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GPIO_Init(GPIOC,&GPIO_InitStructure);
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//GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU; //02-019
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//GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2; //B11 DATA ready
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//GPIO_Init(GPIOE,&GPIO_InitStructure);
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; //B11 DATA ready
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GPIO_Init(GPIOE,&GPIO_InitStructure);
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1; //B10 ADC cs
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GPIO_Init(GPIOC,&GPIO_InitStructure);
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;
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GPIO_Init(GPIOB,&GPIO_InitStructure);
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//GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;
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//GPIO_Init(GPIOE,&GPIO_InitStructure);
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
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GPIO_Init(GPIOE,&GPIO_InitStructure);
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TEM_CS_H;
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// PRE_CS_H;
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//SCLK_L;
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ADReset(TEMGET);
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//ADReset(PREGET);
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}
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/***************************************************************************
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* Function Name: WriteOneByte(unsigned char command)
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* Purpose: write one byte to ADS1120
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* Params :
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*
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*************************************************************************/
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void WriteOneByte(unsigned char command)
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{
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unsigned char i;
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for(i = 0; i < 8;i++)
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{
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if(command&0x80)
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DIN_H;
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else
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DIN_L;
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command <<= 1;
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SCLK_H;
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SCLK_L;
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}
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}
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/***************************************************************************
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* Function Name: ReadOneByte()
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* Purpose: read one byte from ADS1120
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* Params : result
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*
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*************************************************************************/
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unsigned char ReadOneByte(void)
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{
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unsigned char result,i;
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SCLK_L;
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for(i = 0;i<8; i++)
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{
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SCLK_H;
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result <<= 0x01;
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if(DOUT)
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result |= 0X01;
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SCLK_L;
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}
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return result;
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}
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/***************************************************************************
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* Function Name: ReadData()
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* Purpose: read data from ADS1120
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* Params : result 0~65535
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*
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*************************************************************************/
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int16_t ReadData(u8 ch_type)
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{
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int16_t result;
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if(ch_type == TEMGET)
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{
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TEM_CS_L;
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}else if(ch_type == PREGET)
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{
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//PRE_CS_L;
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}
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WriteOneByte(RDATA);
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result = ReadOneByte();
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result = (result<<8) | ReadOneByte();
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if(ch_type == TEMGET)
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{
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TEM_CS_H;
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}else if(ch_type == PREGET)
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{
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//PRE_CS_H;
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}
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return result;
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}
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/***************************************************************************
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* Function Name: ADReset()
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* Purpose: reset ADS1120
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* Params :
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*
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*************************************************************************/
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void ADReset(u8 ch_type)
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{
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if(ch_type == TEMGET)
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{
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TEM_CS_L;
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}else if(ch_type == PREGET)
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{
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//PRE_CS_L;
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}
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WriteOneByte(RESET);
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if(ch_type == TEMGET)
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{
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TEM_CS_H;
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}else if(ch_type == PREGET)
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{
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//PRE_CS_H;
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}
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}
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/***************************************************************************
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* Function Name: ADPowerDown()
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* Purpose:
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* Params :
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*
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*************************************************************************/
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void ADPowerDown(u8 ch_type)
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{
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if(ch_type == TEMGET)
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{
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TEM_CS_L;
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}else if(ch_type == PREGET)
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{
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//PRE_CS_L;
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}
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WriteOneByte(POWERDOWN);
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if(ch_type == TEMGET)
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{
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TEM_CS_H;
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}else if(ch_type == PREGET)
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{
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//PRE_CS_H;
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}
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}
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/***************************************************************************
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* Function Name: ADStartConversion()
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* Purpose: start conversion
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* Params :
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*
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*************************************************************************/
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void ADStartConversion(u8 ch_type)
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{
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if(ch_type == TEMGET)
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{
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TEM_CS_L;
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}else if(ch_type == PREGET)
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{
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//PRE_CS_L;
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}
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WriteOneByte(START);
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if(ch_type == TEMGET)
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{
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TEM_CS_H;
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}else if(ch_type == PREGET)
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{
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//PRE_CS_H;
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}
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}
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/***************************************************************************
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* Function Name: ReadRegister()
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* Purpose: read data from register
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* Params : data
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*
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*************************************************************************/
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void ReadRegister(u8 ch_type)
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{
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unsigned char i;
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unsigned long Data;
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if(ch_type == TEMGET)
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{
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TEM_CS_L;
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}else if(ch_type == PREGET)
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{
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//PRE_CS_L;
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}
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WriteOneByte(RREG|0x03);
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// get the register content
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for (i=0; i< 4; i++)
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{
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Data += ReadOneByte();
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}
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if(ch_type == TEMGET)
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{
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TEM_CS_H;
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}else if(ch_type == PREGET)
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{
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//PRE_CS_H;
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}
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return;
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}
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/***************************************************************************
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* Function Name: WriteRegister(unsigned char StartAddress, unsigned char NumRegs, unsigned char * pData)
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* Purpose: write data to register
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* steps: 1.write address 2.write data
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* Params NumRegs-----the numbers of register
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*************************************************************************/
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void WriteRegister(unsigned char StartAddress, unsigned char NumRegs, unsigned char * pData,u8 ch_type)
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{
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unsigned char i;
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if(ch_type == TEMGET)
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{
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TEM_CS_L;
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}else if(ch_type == PREGET)
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{
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//PRE_CS_L;
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}
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// send the command byte
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WriteOneByte(WREG | (((StartAddress<<2) & 0x0c) |((NumRegs-1)&0x03)));
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// send the data bytes
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for (i=0; i< NumRegs; i++)
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{
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WriteOneByte(*pData);
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pData++;
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}
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if(ch_type == TEMGET)
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{
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TEM_CS_H;
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}else if(ch_type == PREGET)
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{
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//PRE_CS_H;
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}
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return;
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}
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/***************************************************************************
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* Function Name: CofigTemAD(unsigned char channel)
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* Purpose: set the sampling channel
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* Params :
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*
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*************************************************************************/
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void CofigTemAD(void)
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{
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/*ÈýÏßÖÆÅäÖüĴæÆ÷*/
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Init_Config[0] = 0x66;//
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Init_Config[1] = 0X04;//
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Init_Config[2] = 0X55;//
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Init_Config[3] = 0X70;
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WriteRegister(0x00,0x04,Init_Config,TEMGET);
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ReadRegister(TEMGET);
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}
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void CofigPreAD()
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{
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/*ËÄÏßÖÆÅäÖüĴæÆ÷*/
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Init_Config[0] = 0x38;//
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Init_Config[1] = 0X04;//
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Init_Config[2] = 0X18;//
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Init_Config[3] = 0X00;
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WriteRegister(0x00,0x04,Init_Config,PREGET);
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ReadRegister(PREGET);
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}
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/***************************************************************************
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* Function Name: GetAD(unsigned char channel)
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* Purpose: get the result
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* Params : Result 0~65535
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*
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*************************************************************************/
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int16_t TemGetAD()
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{
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int16_t Result;
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CofigTemAD();
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ADStartConversion(TEMGET);
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while(TEM_DRDY_IN);
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Result = ReadData(TEMGET);
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ADPowerDown(TEMGET);
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return Result;
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}
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int16_t PreGetAD()
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{
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int16_t Result;
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CofigPreAD();
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ADStartConversion(PREGET);
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// while(PRE_DRDY_IN);
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Result = ReadData(PREGET);
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ADPowerDown(PREGET);
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return Result;
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}
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float pressure_ad_value(void)
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{
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unsigned int ADC_Res;
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float ad_res;
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//CofigPreAD();
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ADC_Res = PreGetAD();
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ad_res = (float)ADC_Res / MAXVALUE;
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ad_res = ad_res * PRE_K_FACTOR;
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return ad_res;
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}
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float temperature_ad_value(void)
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{
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unsigned int ADC_Res;
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float ad_res;
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//CofigTemAD();
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ADC_Res = TemGetAD();
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ad_res = (float)ADC_Res/MAXVALUE;
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ad_res = ad_res * TEM_K_FACTOR;
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return ad_res;
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}
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void ADS1120_Init(void)
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{
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// uint16_t i,j;
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ADS_for_spi();
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//ADPowerDown(PREGET);
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// ADPowerDown(TEMGET);
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}
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void ADS_for_spi(void)
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{
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GPIO_InitTypeDef GPIO_InitStructure;
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//´ò¿ª¿ØÖƶ˿ÚʱÖÓ
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB|RCC_APB2Periph_GPIOC|RCC_APB2Periph_GPIOE, ENABLE);
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4; //A6 Miso
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0; //B11 DATA ready
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GPIO_Init(GPIOC,&GPIO_InitStructure);
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5; //B11 DATA ready
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GPIO_Init(GPIOC,&GPIO_InitStructure);
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; //B11 DATA ready
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GPIO_Init(GPIOE,&GPIO_InitStructure);
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TEM_PRE_POWER_Power_ON;
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TEM_CS_H;
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//PRE_CS_H;
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}
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