307 lines
6.8 KiB
C
307 lines
6.8 KiB
C
#include "hp303s.h"
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uint8_t reg_0x10_0x21[18];
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uint8_t PRS_CFG = 0x74;//压力分辨率配置 128/s 16times oversampling 寄存器0x06
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uint8_t TMP_CFG = 0XF4;//温度分辨率配置 外部传感器 128/s 16times oversampling 寄存器0x07
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uint8_t CFG_REG = 0X0C;//FIFO配置 寄存器0x09
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HP303S_T_and_P hp303sData;
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REG_0X10_0X21 Reg0x10_0x20;
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COEF_DATA coefData;
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/************************************************
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函数名称 ： SPI_Delay_us
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功 能 ： 软件毫秒延时
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参 数 ： Count ---- 次数
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返 回 值 ： 无
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*************************************************/
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static void spi_delay_us( uint32_t Count )
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{
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delay_us(Count);
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}
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/************************************************
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函数名称 ： Write_SPI_Byte
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功 能 ： SPI写读一个字节
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参 数 ： Byte ---- 数据
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返 回 值 ： Byte ---- 数据
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*************************************************/
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uint8_t write_spi_byte( uint8_t Byte )
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{
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uint8_t i;
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SPI_SCK(HIGH);
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for(i = 0;i < 8;i++)
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{
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SPI_SCK(LOW);
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spi_delay_us(WAIT_TIME); // 空等待
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#if 0
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SPI_MOSI((Byte & 0x80) >> 7);
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#else
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if(Byte & 0x80)
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{
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SPI_MOSI(HIGH);
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}
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else
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{
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SPI_MOSI(LOW);
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}
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#endif
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Byte <<= 1;
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spi_delay_us(WAIT_TIME); // 空等待
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SPI_SCK(HIGH);
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spi_delay_us(WAIT_TIME); // 空等待
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Byte |= SPI_MISO;
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}
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return Byte;
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}
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/************************************************
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函数名称 ： Read_SPI_Byte
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功 能 ： SPI只读一个字节
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参 数 ： 无
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返 回 值 ： temp ---- 数据
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*************************************************/
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uint8_t read_spi_byte(void)
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{
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uint8_t i;
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uint8_t temp = 0;
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SPI_SCK(HIGH);
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for(i = 0;i < 8;i++)
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{
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SPI_SCK(LOW);
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spi_delay_us(WAIT_TIME); // 空等待
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temp <<= 1;
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#if 1
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temp |= SPI_MISO;
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#else
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if(SPI_MISO)
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{
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temp++;
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}
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#endif
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SPI_SCK(HIGH);
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spi_delay_us(WAIT_TIME); // 空等待
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}
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return temp;
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}
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/*******************************************************************************
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函数名称 ： hp303_reg_read
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功 能 ： HP303S寄存器数据读取
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参 数 ： reg_add--寄存器地址，reg_num--寄存器数量，reg_data--存储数组
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返 回 值 ： 无
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*******************************************************************************/
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void hp303_reg_read(uint8_t reg_add,uint8_t reg_num,uint8_t *reg_data)
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{
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HP303_CS(0);
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spi_delay_us(10);
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write_spi_byte(reg_add | 0x80);
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for(int i = 0;i < reg_num;i++)
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{
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reg_data[i] = read_spi_byte();
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}
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HP303_CS(1);
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spi_delay_us(10);
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}
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/*******************************************************************************
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函数名称 ： hp303_reg_write
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功 能 ： HP303S寄存器数据写入
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参 数 ： reg_add--寄存器地址，reg_data--写入数据
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返 回 值 ： 无
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*******************************************************************************/
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void hp303_reg_write(uint8_t reg_add,uint8_t reg_data)
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{
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HP303_CS(0);
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spi_delay_us(10);
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write_spi_byte(reg_add);
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write_spi_byte(reg_data);
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HP303_CS(1);
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spi_delay_us(10);
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}
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/*******************************************************************************
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函数名称 ： coef_calc
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功 能 ： HP303S出厂校准值获取
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参 数 ： 无
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返 回 值 ： 无
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*******************************************************************************/
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void coef_calc(void)
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{
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coefData.C0 = ( reg_0x10_0x21[0] << 4) | ((reg_0x10_0x21[1] & 0XF0) >> 4);
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if(coefData.C0 > (2048 - 1))
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{
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coefData.C0 = coefData.C0 - 4096;
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}
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coefData.C1 = ((reg_0x10_0x21[1] & 0X0F) << 8 | (reg_0x10_0x21[2]));
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if(coefData.C1 > 2047)
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{
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coefData.C1 = coefData.C1-4096;
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}
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coefData.C00 = (reg_0x10_0x21[3] << 12)|(reg_0x10_0x21[4] << 4)|((reg_0x10_0x21[5] & 0xF0) >> 4);
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if(coefData.C00 > 524287)
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{
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coefData.C00 = coefData.C00 - 1048576;
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}
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coefData.C10 = ((reg_0x10_0x21[5] & 0x0F) << 16) | (reg_0x10_0x21[6] << 8) | reg_0x10_0x21[7];
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if(coefData.C10 > 524287)
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{
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coefData.C10 = coefData.C10 - 1048576;
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}
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coefData.C01= (reg_0x10_0x21[8] << 8) | (reg_0x10_0x21[9]);
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if(coefData.C01 > 32767)
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{
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coefData.C01 = coefData.C01 - 65536;
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}
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coefData.C11 = (reg_0x10_0x21[10] << 8) |(reg_0x10_0x21[11]);
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if(coefData.C11 > 32767)
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{
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coefData.C11 = coefData.C11 - 65536;
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}
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coefData.C20 = reg_0x10_0x21[11] | (reg_0x10_0x21[12] << 8);
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if(coefData.C20 > (32768-1))
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{
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coefData.C20 = coefData.C20 - 65536;
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}
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coefData.C21 = (reg_0x10_0x21[14] << 8) | (reg_0x10_0x21[15]);
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if(coefData.C21 > 32767)
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{
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coefData.C21 = coefData.C21 - 65536;
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}
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coefData.C30 = (reg_0x10_0x21[16] << 8 ) | (reg_0x10_0x21[17]);
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if(coefData.C30 > 32767)
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{
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coefData.C30 = coefData.C30 - 65536;
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}
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}
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/*******************************************************************************
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函数名称 ： hp303_init
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功 能 ： HP303S初始化
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参 数 ： 无
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返 回 值 ： 无
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*******************************************************************************/
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void hp303_init(void)
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{
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HP303_CS(1);
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spi_delay_us(10);
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hp303_reg_read(0x10,18,reg_0x10_0x21);//Get coefficient
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delay_ms(400);
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hp303_reg_write(0x06,PRS_CFG);//Pressure Resolution Config 0x06
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delay_ms(200);
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hp303_reg_write(0x07,TMP_CFG);//Temperature Resolution Config 0x07
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delay_ms(200);
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hp303_reg_write(0x09,CFG_REG);//Set P result shift
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delay_ms(200);
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coef_calc();
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}
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int step_cnt = 0;
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/*******************************************************************************
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函数名称 ： hp303_read
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功 能 ： HP303S数据读取
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参 数 ： 无
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返 回 值 ： 无
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*******************************************************************************/
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void hp303_read(void)
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{
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switch(step_cnt)
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{
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//计算温度
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case 0 :
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{
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hp303_reg_write(0x08,0x02);
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step_cnt = 1;
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}
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break;
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case 1:
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{
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hp303_reg_read(0x03,3,hp303sData.TMP_B);
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step_cnt = 2;
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}
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break;
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case 2:
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{
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coefData.Traw = (hp303sData.TMP_B[0] << 16) | (hp303sData.TMP_B[1] << 8) | (hp303sData.TMP_B[0] << 0);
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if(coefData.Traw > 8388607)
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{
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coefData.Traw = coefData.Traw -16777216;
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}
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coefData.Traw_sc = ((double)coefData.Traw / HP303S_KP);
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coefData.Tcomp = coefData.C0 * 0.5 + coefData.C1 * coefData.Traw_sc;
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step_cnt = 3;
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}
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break;
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//计算压力
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case 3:
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{
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hp303_reg_write(0x08,0x01);
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step_cnt = 4;
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}
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break;
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case 4:
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{
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hp303_reg_read(0x00,3,hp303sData.PRS_B);
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step_cnt = 5;
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}
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break;
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case 5:
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{
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coefData.Praw = (hp303sData.PRS_B[0] << 16) | (hp303sData.PRS_B[1] << 8) | (hp303sData.PRS_B[2] << 0);
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if( coefData.Praw > 8388607)
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{
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coefData.Praw = coefData.Praw - 16777216;
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}
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coefData.Praw_sc = ((double)coefData.Praw / HP303S_KP);
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coefData.Pcomp = coefData.C00 + (coefData.Praw_sc * (coefData.C10 + coefData.Praw_sc * (coefData.C20 + (coefData.Praw_sc * coefData.C30))))
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+ (coefData.Traw_sc * coefData.C01) + (coefData.Traw_sc * coefData.Praw_sc * (coefData.C11 + (coefData.Praw_sc * coefData.C21)));
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step_cnt = 6;
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}
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break;
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case 6:
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{
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if((coefData.Pcomp / 100 + pressure_offsets[0]) >= 0 && (!(coefData.Pcomp == 0)))
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{
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InputReg[8] = coefData.Pcomp / 100 + pressure_offsets[0];
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}
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else
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{
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pressure_offsets[0] = -coefData.Pcomp / 100;
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InputReg[8] = coefData.Pcomp / 100 + pressure_offsets[0];
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}
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step_cnt = 0;
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}
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break;
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}
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}
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