347 lines
6.5 KiB
C
347 lines
6.5 KiB
C
#include "MS5803.h"
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PromVar PROMData;
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volatile int32_t CurrentTemp = 0,CurrentPress = 0;
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/* SPI handler declaration */
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/* Buffer used for transmission */
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uint8_t aTxBuffer[4];
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uint8_t aRxBuffer[4];
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uint8_t NSS_Select = 1;
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//拉高所有片选脚
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void SetCS(void)
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{
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LL_GPIO_SetOutputPin(SPI1_NSS1_GPIO_Port,SPI1_NSS1_Pin);
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LL_GPIO_SetOutputPin(SPI1_NSS2_GPIO_Port,SPI1_NSS2_Pin);
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LL_GPIO_SetOutputPin(SPI1_NSS3_GPIO_Port,SPI1_NSS3_Pin);
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LL_GPIO_ResetOutputPin(SPI1_NSS4_GPIO_Port,SPI1_NSS4_Pin);
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LL_GPIO_SetOutputPin(SPI1_NSS5_GPIO_Port,SPI1_NSS5_Pin);
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LL_GPIO_SetOutputPin(SPI1_NSS6_GPIO_Port,SPI1_NSS6_Pin);
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LL_GPIO_SetOutputPin(SPI1_NSS7_GPIO_Port,SPI1_NSS7_Pin);
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LL_GPIO_ResetOutputPin(SPI1_NSS8_GPIO_Port,SPI1_NSS8_Pin);
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}
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void ClrCS(void)
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{
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switch(NSS_Select)
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{
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case 1 :
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LL_GPIO_ResetOutputPin(SPI1_NSS1_GPIO_Port,SPI1_NSS1_Pin);
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break;
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case 2 :
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LL_GPIO_ResetOutputPin(SPI1_NSS2_GPIO_Port,SPI1_NSS2_Pin);
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break;
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case 3 :
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LL_GPIO_ResetOutputPin(SPI1_NSS3_GPIO_Port,SPI1_NSS3_Pin);
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break;
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case 4 :
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LL_GPIO_SetOutputPin(SPI1_NSS4_GPIO_Port,SPI1_NSS4_Pin);
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break;
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case 5 :
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LL_GPIO_ResetOutputPin(SPI1_NSS5_GPIO_Port,SPI1_NSS5_Pin);
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break;
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case 6 :
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LL_GPIO_ResetOutputPin(SPI1_NSS6_GPIO_Port,SPI1_NSS6_Pin);
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break;
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case 7 :
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LL_GPIO_ResetOutputPin(SPI1_NSS7_GPIO_Port,SPI1_NSS7_Pin);
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break;
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case 8 :
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LL_GPIO_SetOutputPin(SPI1_NSS8_GPIO_Port,SPI1_NSS8_Pin);
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break;
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}
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}
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//****************************************
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//*功能：向MS5803写入命令
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//*参数：CMD
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//*返回：True/False
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static int WriteCmd(uint8_t CMD)
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{
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memset(aTxBuffer,0,sizeof(aTxBuffer));
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aTxBuffer[0] = CMD;
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ClrCS();// pull CSB low to start the command
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delay_tick(10);
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if(HAL_SPI_Transmit(&hspi1,(uint8_t*)aTxBuffer,1,1))
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{
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SetCS();
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return 1;
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}
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else
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{
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SetCS();
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return 0;
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}
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}
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//****************************************
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//*功能：根据指令从MS5803读相应数据
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//*参数：CMD,Count
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//*返回：True/False
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static int ReadCmdData(uint8_t CMD,uint8_t Count)
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{
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memset(aTxBuffer,0,sizeof(aTxBuffer));
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aTxBuffer[0] = CMD;
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ClrCS();
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delay_tick(10);
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if(HAL_SPI_TransmitReceive(&hspi1, (uint8_t*)aTxBuffer, (uint8_t *)aRxBuffer, Count+1, 1))
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{
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SetCS();
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return 1;
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}
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else
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{
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SetCS();
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return 0;
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}
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//memmove(aRxBuffer,aRxBuffer+1,Count);//
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}
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//****************************************
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//*功能：复位MS5803
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//*参数：
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//*返回：
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static void ResetDevice()
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{
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WriteCmd(RESET);
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LL_mDelay(3); //必须延时3ms
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}
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//****************************************
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//*功能：获取PROM校准参数,只需要获取一次
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//*参数：
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//*返回：
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static void GetPromData()
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{
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memset(aRxBuffer,0,sizeof(aRxBuffer));
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ReadCmdData(Cof1,2);
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PROMData.C1[NSS_Select] = (aRxBuffer[1]<<8) + aRxBuffer[2];
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memset(aRxBuffer,0,sizeof(aRxBuffer));
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ReadCmdData(Cof2,2);
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PROMData.C2[NSS_Select] = (aRxBuffer[1]<<8) + aRxBuffer[2];
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memset(aRxBuffer,0,sizeof(aRxBuffer));
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ReadCmdData(Cof3,2);
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PROMData.C3[NSS_Select] = (aRxBuffer[1]<<8) + aRxBuffer[2];
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memset(aRxBuffer,0,sizeof(aRxBuffer));
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ReadCmdData(Cof4,2);
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PROMData.C4[NSS_Select] = (aRxBuffer[1]<<8) + aRxBuffer[2];
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memset(aRxBuffer,0,sizeof(aRxBuffer));
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ReadCmdData(Cof5,2);
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PROMData.C5[NSS_Select] = (aRxBuffer[1]<<8) + aRxBuffer[2];
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memset(aRxBuffer,0,sizeof(aRxBuffer));
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ReadCmdData(Cof6,2);
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PROMData.C6[NSS_Select] = (aRxBuffer[1]<<8) + aRxBuffer[2];
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}
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//****************************************
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//*功能：MS5803初始化
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//*参数：
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//*返回：
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void MS5803Init()
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{
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// LL_SPI_Enable(SPI1);
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//SPI_Init();
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LL_GPIO_ResetOutputPin(SENSOR_SELECT_GPIO_Port,SENSOR_SELECT_Pin);
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SetCS();
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NSS_Select = 1;
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delay_tick(10);
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//初始化代码
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ResetDevice();
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GetPromData();
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NSS_Select = 2;
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delay_tick(10);
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//初始化代码
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ResetDevice();
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GetPromData();
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NSS_Select = 3;
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delay_tick(10);
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//初始化代码
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ResetDevice();
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GetPromData();
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//
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// NSS_Select = 4;
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// //初始化代码
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// ResetDevice();
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// GetPromData();
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}
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//****************************************
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//*功能：获取温度和压力 MS5803-14BA
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//*参数：
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//*返回：
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void StartCalculation()
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{
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uint32_t D1,D2;
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int32_t dT,TEMP;
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int64_t OFF,SENS;
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//转换压力
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WriteCmd(CD1_256);
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LL_mDelay(1); //必须延时10ms
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ReadCmdData(ADC_Read,3);
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D1 = (aRxBuffer[1]*pow(2,16)) + (aRxBuffer[2]*pow(2,8)) + aRxBuffer[3];
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//转换温度
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WriteCmd(CD2_256);
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LL_mDelay(1); //必须延时10ms
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ReadCmdData(ADC_Read,3);
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D2 = (aRxBuffer[1]*pow(2,16)) + (aRxBuffer[2]*pow(2,8)) + aRxBuffer[3];
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//计算温度
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dT = D2 - (PROMData.C5[NSS_Select]*pow(2,8));
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if(dT > 16777216)
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{
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dT = 16777216;
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}
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else if(dT < -16776960)
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{
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dT = -16776960;
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}
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TEMP = 2000 + ((((long long)dT)*PROMData.C6[NSS_Select])/pow(2,23));
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//计算压力
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OFF = (PROMData.C2[NSS_Select]*pow(2,16)) + ((((long long)dT)*PROMData.C4[NSS_Select])/pow(2,7));
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if(OFF > 51538821120)
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{
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OFF = 51538821120;
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}
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else if(OFF < -34358689800)
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{
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OFF = -34358689800;
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}
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SENS = (((long long)PROMData.C1[NSS_Select])*pow(2,15)) + ((((long long)dT)*PROMData.C3[NSS_Select])/pow(2,8));
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if(SENS > 17179607040)
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{
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SENS = 17179607040;
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}
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else if(SENS < -8589672450)
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{
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SENS = -8589672450;
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}
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__nop();
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//Second order compensation
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long T2 = 0,OFF2 = 0,SENS2 = 0;
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if(TEMP < 2000)
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{
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T2 = (3*pow(dT,2))/pow(2,33);
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OFF2 = (3*pow((TEMP-2000),2))/pow(2,1);
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SENS2 = (5*pow((TEMP-2000),2))/pow(2,3);
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if(TEMP < -1500)
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{
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OFF2 += 7 * pow(TEMP+1500,2);
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SENS2 += 4 * pow((TEMP+1500),2);
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}
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}
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else
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{
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T2 = (7*pow(dT,2))/pow(2,37);
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OFF2 = pow((TEMP-2000),2)/pow(2,4);
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}
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CurrentTemp = TEMP - T2;
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OFF -= OFF2;
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SENS -= SENS2;
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CurrentPress = (((((long long)SENS)*D1)/pow(2,21)) - OFF)/pow(2,15);
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__nop();
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}
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void ms5803_task(void)
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{
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StartCalculation();
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switch(NSS_Select)
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{
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case 1 :
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{
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press_array1[a1] = CurrentPress/10;
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a1++;
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if(a1 > 9) a1 = 0;
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for(int a = 0;a < 10;a++)
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{
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press_array1_sum += press_array1[a];
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}
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InputReg[NSS_Select + 6] = press_array1_sum/10;//压力数据存入
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press_array1_sum = 0;
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NSS_Select++;
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}
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break;
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case 2 :
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{
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press_array2[a2] = CurrentPress/10;
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a2++;
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if(a2 > 9) a2 = 0;
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for(int a = 0;a < 10;a++)
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{
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press_array2_sum += press_array2[a];
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}
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InputReg[NSS_Select + 6] = press_array2_sum/10;//压力数据存入
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press_array2_sum = 0;
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NSS_Select++;
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}
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break;
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case 3 :
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{
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press_array3[a3] = CurrentPress/10;
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a3++;
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if(a3 > 9) a3 = 0;
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for(int a = 0;a < 10;a++)
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{
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press_array3_sum += press_array3[a];
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}
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InputReg[NSS_Select + 6] = press_array3_sum/10;//压力数据存入
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press_array3_sum = 0;
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NSS_Select = 1;
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}
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break;
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case 4 :
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{
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}
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break;
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case 5 :
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{
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}
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break;
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case 6 :
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{
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}
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break;
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}
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}
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