【官方】G0子板读取传感器与F7通信

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主程序主要代码

main.c

1. MX_GPIO_Init();
   
2. MX_USART2_UART_Init();//G0和F7通信
   
3. MX_USART1_UART_Init();
   
4. MX_USART3_UART_Init();
   
5. MX_USART4_UART_Init();//Printf
   
6. MX_I2C1_Init();
   
7. APP_Init();
   
8. while (1)
   
9.   {
   
10.         tmp = HAL_GetTick();
    
11.         if(tmp - tick > 1000)
    
12.         {
    
13.                 tick = tmp;
    
14.                 APP_Process();
    
15.                 printf("APP_Process\n\r");
    
16.         }
    
17.   }

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读取传感器数据STM32CubeMX配置I2C外设

主要代码

sht30hi2c.c

1. /* Includes ------------------------------------------------------------------*/
   
2. #include "i2c.h"
   
3. #include "sht30.h"
   
4. extern I2C_HandleTypeDef hi2c1;
   
5. typedef enum
   
6. {
   
7.   SHT30_OK       = 0x00U,
   
8.   SHT30_ERROR    = 0x01U,
   
9. } SHT30_StatusTypeDef;
   
10. //======================================I2Cx redefine start===================================
    
11. static void I2Cx_Error(uint8_t Addr)
    
12. {
    
13.   /* De-initialize the I2C communication bus */
    
14.   HAL_I2C_DeInit(&hi2c1);
    
15.   
    
16.   /* Re-Initialize the I2C communication bus */
    
17.   MX_I2C1_Init();
    
18. }
    
19. 
    
20. static void SHT3X_WriteCMD(unsigned short cmd)
    
21. {
    
22.         uint8_t buf[2];
    
23.         buf[0]=cmd>>8;
    
24.         buf[1]=cmd;
    
25.         HAL_StatusTypeDef status = HAL_OK;
    
26.         status = HAL_I2C_Master_Transmit(&hi2c1, SHT3X_WR_ADDR, buf, 2, 1000);
    
27.         if(status != HAL_OK)
    
28.         {
    
29.                 /* I2C error occurred */
    
30.                I2Cx_Error(SHT3X_WR_ADDR);
    
31.         }
    
32. }
    
33. static int SHT3X_ReadData(unsigned short cmd, unsigned char *buf, unsigned short len)
    
34. {
    
35.         HAL_StatusTypeDef status = HAL_OK;
    
36.         status = HAL_I2C_Mem_Read(&hi2c1, SHT3X_WR_ADDR, cmd, I2C_MEMADD_SIZE_16BIT, buf, len, 1000);
    
37.         if(status != HAL_OK)
    
38.         {
    
39.                 /* I2C error occurred */
    
40.                I2Cx_Error(SHT3X_WR_ADDR);
    
41.         }
    
42.         return SHT30_OK;
    
43. }
    
44. 
    
45. static unsigned char SHT3X_CalcCrc(unsigned char *crcdata, unsigned char nbrOfBytes)
    
46. {
    
47.     unsigned char Bit;        // bit mask
    
48.     unsigned char crc = 0xFF; // calculated checksum
    
49.     unsigned char byteCtr;    // byte counter
    
50.   
    
51.     // calculates 8-Bit checksum with given polynomial
    
52.     for(byteCtr = 0; byteCtr < nbrOfBytes; byteCtr++)
    
53.     {
    
54.         crc ^= (crcdata[byteCtr]);
    
55.         for(Bit = 8; Bit > 0; --Bit)
    
56.         {
    
57.             if(crc & 0x80) crc = (crc << 1) ^ POLYNOMIAL;
    
58.             else           crc = (crc << 1);
    
59.         }
    
60.     }
    
61.     return crc;
    
62. }
    
63. 
    
64. void SHT3X_Init(void)
    
65. {
    
66.         HAL_Delay(20);
    
67.     SHT3X_WriteCMD(CMD_MEAS_PERI_10_H);
    
68. }
    
69. 
    
70. int SHT3X_GetTempAndHumi(short *temp, short *humi)
    
71. {
    
72.     unsigned long int  rawValueTemp;    // temperature raw value from sensor
    
73.     unsigned long int  rawValueHumi;    // humidity raw value from sensor
    
74.     unsigned char Rdata[6]={0};      
    
75. 
    
76.     if(SHT3X_ReadData(CMD_FETCH_DATA, Rdata, 6)==SHT30_ERROR)
    
77.         {
    
78.                 return SHT30_ERROR;
    
79.         }
    
80.     if(Rdata[2] == SHT3X_CalcCrc(Rdata, 2) && Rdata[5] == SHT3X_CalcCrc(&Rdata[3], 2))
    
81.     {
    
82.         rawValueTemp = (Rdata[0] << 8) | Rdata[1];
    
83.         rawValueHumi = (Rdata[3] << 8) | Rdata[4];
    
84.         *temp =(short)(1750 * rawValueTemp / 65535 - 450);
    
85.         *humi =(short)(1000 * rawValueHumi / 65535);   
    
86.                 HAL_GPIO_TogglePin(USR_LED1_GPIO_Port, USR_LED1_Pin);//LED1
    
87.         return SHT30_OK;
    
88.     }
    
89.     return SHT30_ERROR;
    
90. }

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sht30.h

1. /* Define to prevent recursive inclusion -------------------------------------*/
   
2. #ifndef __sht30_H
   
3. #define __sht30_H
   
4. #ifdef __cplusplus
   
5. extern "C" {
   
6. #endif
   
7. 
   
8. /* Includes ------------------------------------------------------------------*/
   
9. #include "main.h"
   
10. 
    
11. #define CMD_READ_SERIALNBR   0x3780 // read serial number
    
12. #define CMD_READ_STATUS      0xF32D // read status register
    
13. #define CMD_CLEAR_STATUS     0x3041 // clear status register
    
14. #define CMD_HEATER_ENABLE    0x306D // enabled heater
    
15. #define CMD_HEATER_DISABLE   0x3066 // disable heater
    
16. #define CMD_SOFT_RESET       0x30A2 // soft reset
    
17. #define CMD_MEAS_CLOCKSTR_H  0x2C06 // meas. clock stretching, high rep.
    
18. #define CMD_MEAS_CLOCKSTR_M  0x2C0D // meas. clock stretching, medium rep.
    
19. #define CMD_MEAS_CLOCKSTR_L  0x2C10 // meas. clock stretching, low rep.
    
20. #define CMD_MEAS_POLLING_H   0x2400 // meas. no clock stretching, high rep.
    
21. #define CMD_MEAS_POLLING_M   0x240B // meas. no clock stretching, medium rep.
    
22. #define CMD_MEAS_POLLING_L   0x2416 // meas. no clock stretching, low rep.
    
23. #define CMD_MEAS_PERI_05_H   0x2032 // meas. periodic 0.5 mps, high rep.
    
24. #define CMD_MEAS_PERI_05_M   0x2024 // meas. periodic 0.5 mps, medium rep.
    
25. #define CMD_MEAS_PERI_05_L   0x202F // meas. periodic 0.5 mps, low rep.
    
26. #define CMD_MEAS_PERI_1_H    0x2130 // meas. periodic 1 mps, high rep.
    
27. #define CMD_MEAS_PERI_1_M    0x2126 // meas. periodic 1 mps, medium rep.
    
28. #define CMD_MEAS_PERI_1_L    0x212D // meas. periodic 1 mps, low rep.
    
29. #define CMD_MEAS_PERI_2_H    0x2236 // meas. periodic 2 mps, high rep.
    
30. #define CMD_MEAS_PERI_2_M    0x2220 // meas. periodic 2 mps, medium rep.
    
31. #define CMD_MEAS_PERI_2_L    0x222B // meas. periodic 2 mps, low rep.
    
32. #define CMD_MEAS_PERI_4_H    0x2334 // meas. periodic 4 mps, high rep.
    
33. #define CMD_MEAS_PERI_4_M    0x2322 // meas. periodic 4 mps, medium rep.
    
34. #define CMD_MEAS_PERI_4_L    0x2329 // meas. periodic 4 mps, low rep.
    
35. #define CMD_MEAS_PERI_10_H   0x2737 // meas. periodic 10 mps, high rep.
    
36. #define CMD_MEAS_PERI_10_M   0x2721 // meas. periodic 10 mps, medium rep.
    
37. #define CMD_MEAS_PERI_10_L   0x272A // meas. periodic 10 mps, low rep.
    
38. #define CMD_FETCH_DATA       0xE000 // readout measurements for periodic mode
    
39. #define CMD_R_AL_LIM_LS      0xE102 // read alert limits, low set
    
40. #define CMD_R_AL_LIM_LC      0xE109 // read alert limits, low clear
    
41. #define CMD_R_AL_LIM_HS      0xE11F // read alert limits, high set
    
42. #define CMD_R_AL_LIM_HC      0xE114 // read alert limits, high clear
    
43. #define CMD_W_AL_LIM_LS      0x6100 // write alert limits, low set
    
44. #define CMD_W_AL_LIM_LC      0x610B // write alert limits, low clear
    
45. #define CMD_W_AL_LIM_HS      0x611D // write alert limits, high set
    
46. #define CMD_W_AL_LIM_HC      0x6116 // write alert limits, high clear
    
47. #define CMD_NO_SLEEP         0x303E
    
48. 
    
49. 
    
50. #define POLYNOMIAL  0x31 // P(x) = x^8 + x^5 + x^4 + 1 = 00110001
    
51. 
    
52. 
    
53. #define SHT3XADDR     0x44                 //SHT3X的I2C地址
    
54. #define SHT3X_WR_ADDR     (SHT3XADDR << 1)
    
55. #define SHT3X_RD_ADDR    (SHT3X_WR_ADDR | 0x01)
    
56. 
    
57. 
    
58. void SHT3X_Init(void);
    
59. int SHT3X_GetTempAndHumi(short *temp, short *humi);
    
60. 
    
61. 
    
62. 
    
63. 
    
64. #ifdef __cplusplus
    
65. }
    
66. #endif
    
67. #endif /*__ usart_H */

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G0子板与F7子板通信STM32CubeMX配置USART外设

根据原理图,STM32CubeMX配置G0通过USART2与F7子板通信外设:

主要代码

app.c

1. static short temperature = 0, humidity = 0;
   
2. 
   
3. #define FRM_START                0x68
   
4. #define FRM_CMD_UPD_SENSOR       0x01
   
5. #define FRM_FIXLEN               14
   
6. #define FRM_END0                 0x5c
   
7. #define FRM_END1                 0x6e
   
8. 
   
9. #define FRM_POS_START            0
   
10. #define FRM_POS_CMD              1
    
11. #define FRM_POS_LEN              2
    
12. #define FRM_POS_DATA             3
    
13. #define FRM_POS_CRC              11
    
14. #define FRM_POS_END0             12
    
15. #define FRM_POS_END1             13
    
16. 
    
17. //eg:68 cmd len t t h h x x y y crc 16 / crc = 68 + cmd + len + t + t + h + h + x + x + y + y 16
    
18. extern UART_HandleTypeDef huart2;
    
19. uint8_t cal_crc(uint8_t *buf,uint8_t len)
    
20. {
    
21.        uint8_t t_crc = 0;
    
22.        uint8_t r_crc = 0;
    
23.         //check crc
    
24.         for(int i=0; i

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Thief

这个程序没写完啊

admin

Thief 发表于 2020-10-9 16:14
这个程序没写完啊

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