RA2L1开发板I2C读取DHTC12温湿度

yuyy1989

FSP配置I2C引脚和参数


驱动代码修改

1. #include "r_iic_master.h"
   
2. 
   
3. #define DHTC12_I2C_ADDR 0x44
   
4. static uint16_t HumA,HumB;
   
5. 
   
6. i2c_master_event_t g_i2c_callback_event;
   
7. 
   
8. /* Callback function */
   
9. void i2c_master_callback(i2c_master_callback_args_t *p_args)
   
10. {
    
11.     g_i2c_callback_event = p_args->event;
    
12. }
    
13. 
    
14. void yuyy_dhtc12_iic_init(void)
    
15. {
    
16.         R_IIC_MASTER_Open(&g_i2c_master0_ctrl,&g_i2c_master0_cfg);
    
17.     R_IIC_MASTER_SlaveAddressSet(&g_i2c_master0_ctrl,DHTC12_I2C_ADDR,I2C_MASTER_ADDR_MODE_7BIT);
    
18. }
    
19. 
    
20. 
    
21. uint8_t yuyy_dhtc12_iic_senddatas(uint8_t devaddr,uint16_t regaddr,uint8_t regaddrlen,uint8_t *datas,uint8_t datalen)
    
22. {
    
23.     fsp_err_t err = FSP_SUCCESS;
    
24.     uint8_t sdata[8] = {0},i=0;
    
25.     R_IIC_MASTER_SlaveAddressSet(&g_i2c_master0_ctrl,devaddr,I2C_MASTER_ADDR_MODE_7BIT);
    
26.     if(regaddrlen == 1)
    
27.     {
    
28.         sdata[0] = regaddr&0xFF;
    
29.         i = 1;
    
30.     }
    
31.     else if(regaddrlen == 2)
    
32.     {
    
33.         sdata[0] = (regaddr>>8)&0xFF;
    
34.         sdata[1] = regaddr&0xFF;
    
35.         i = 2;
    
36.     }
    
37.     while(i<regaddrlen+datalen)
    
38.     {
    
39.         sdata[i] = datas[i-regaddrlen];
    
40.         i++;
    
41.     }
    
42.     err = R_IIC_MASTER_Write(&g_i2c_master0_ctrl,sdata,i,false);
    
43.     i = 0;
    
44.     while ((I2C_MASTER_EVENT_TX_COMPLETE != g_i2c_callback_event) && i<3)
    
45.     {
    
46.         R_BSP_SoftwareDelay(5, BSP_DELAY_UNITS_MILLISECONDS);
    
47.         i++;
    
48.     }
    
49.     if(i == 3)
    
50.         err = FSP_ERR_TIMEOUT;
    
51.         return err;
    
52. }
    
53. uint8_t yuyy_dhtc12_iic_readdatas(uint8_t devaddr,uint16_t regaddr,uint8_t regaddrlen,uint8_t *datas,uint8_t datalen)
    
54. {
    
55.         fsp_err_t err = FSP_SUCCESS;
    
56.     uint8_t sdata[2] = {0},i=0;
    
57.     R_IIC_MASTER_SlaveAddressSet(&g_i2c_master0_ctrl,devaddr,I2C_MASTER_ADDR_MODE_7BIT);
    
58.     if(regaddrlen == 1)
    
59.     {
    
60.         sdata[0] = regaddr&0xFF;
    
61.         i = 1;
    
62.     }
    
63.     else if(regaddrlen == 2)
    
64.     {
    
65.         sdata[0] = (regaddr>>8)&0xFF;
    
66.         sdata[1] = regaddr&0xFF;
    
67.         i = 2;
    
68.     }
    
69.     err = R_IIC_MASTER_Write(&g_i2c_master0_ctrl,sdata,i,true);
    
70.     i = 0;
    
71.     while ((I2C_MASTER_EVENT_TX_COMPLETE != g_i2c_callback_event) && i<3)
    
72.     {
    
73.         R_BSP_SoftwareDelay(5, BSP_DELAY_UNITS_MILLISECONDS);
    
74.         i++;
    
75.     }
    
76.     if(i == 3)
    
77.         err = FSP_ERR_TIMEOUT;
    
78.     if(err == FSP_SUCCESS)
    
79.     {
    
80.         err = R_IIC_MASTER_Read(&g_i2c_master0_ctrl,datas,datalen,false);
    
81.         i = 0;
    
82.         while ((I2C_MASTER_EVENT_RX_COMPLETE != g_i2c_callback_event) && i<3)
    
83.         {
    
84.             R_BSP_SoftwareDelay(5, BSP_DELAY_UNITS_MILLISECONDS);
    
85.             i++;
    
86.         }
    
87.         if(i == 3)
    
88.             err = FSP_ERR_TIMEOUT;
    
89.     }
    
90.     return err;
    
91. }
    
92. void yuyy_dhtc12_delayms(uint16_t ms)
    
93. {
    
94.         R_BSP_SoftwareDelay(ms,BSP_DELAY_UNITS_MILLISECONDS);
    
95. }

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