289 lines
5.9 KiB
C
289 lines
5.9 KiB
C
#include "bsp_temperature.h"
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rt_device_t bsp_temper_dev = RT_NULL;
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extern iic_control_t iic_ctl_temper;
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#if USE_IIC_EXTEND_TEMP
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rt_err_t temper_init(rt_device_t dev)
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{
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uint32_t serial_number = 0;
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user_iic_init();
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LOG_OUT("temper_init\r\n");
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uint8_t data_read[6] = {0};
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user_iic_read_byte_more_16bit(SHT3X_ADDR, SHT3X_SERIAL_NUM, data_read, 6);
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if( SHT3X_CRC_Check(data_read, 2, data_read[2]) == 1)
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{
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if( SHT3X_CRC_Check(data_read+3, 2, data_read[5]) == 1)
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{
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LOG_OUT("SHT3X_CRC_Check ok\r\n");
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}
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}
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for(uint8_t t=0; t<6; t++)
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{
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LOG_OUT("%x=%x\r\n", t, data_read[t]);
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}
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LOG_OUT("\r\n");
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serial_number = (data_read[0]<<24) |
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(data_read[1]<<16) |
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(data_read[3]<<8) |
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(data_read[4]) ;
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LOG_OUT("serial_number=%d \r\n", serial_number);
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return RT_EOK;
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}
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#else
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rt_err_t temper_init(rt_device_t dev)
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{
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uint32_t serial_number = 0;
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//打开
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SHT3X_HIGH;
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SHT3X_SCL_HIGH;
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SHT3X_SDA_HIGH;
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rt_thread_mdelay(1000);
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user_iic_init_extend(&iic_ctl_temper);
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LOG_OUT("temper_init\r\n");
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uint8_t data_read[6] = {0};
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user_iic_read_byte_more_16bit_extend(&iic_ctl_temper, SHT3X_ADDR, SHT3X_SERIAL_NUM, data_read, 6);
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for(uint8_t t=0; t<6; t++)
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{
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LOG_OUT("%x=%x\r\n", t, data_read[t]);
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}
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LOG_OUT("\r\n");
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if( SHT3X_CRC_Check(data_read, 2, data_read[2]) == 1)
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{
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if( SHT3X_CRC_Check(data_read+3, 2, data_read[5]) == 1)
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{
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LOG_OUT("SHT3X_CRC_Check ok\r\n");
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}
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}
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serial_number = (data_read[0]<<24) |
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(data_read[1]<<16) |
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(data_read[3]<<8) |
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(data_read[4]) ;
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LOG_OUT("serial_number=%d \r\n", serial_number);
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//关闭
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SHT3X_LOW;
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SHT3X_SCL_LOW;
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SHT3X_SDA_LOW;
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return RT_EOK;
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}
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#endif
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rt_err_t temper_open(rt_device_t dev, rt_uint16_t oflag)
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{
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//LOG_OUT("temper_open\r\n");
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return RT_EOK;
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}
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rt_err_t temper_close(rt_device_t dev)
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{
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//LOG_OUT("temper_close\r\n");
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return RT_EOK;
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}
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#if USE_IIC_EXTEND_TEMP
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rt_size_t temper_read(rt_device_t dev, rt_off_t pos, void *buffer, rt_size_t size)
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{
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LOG_OUT("temper_read\r\n");
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uint8_t data_r[6] = {0};
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float Temperature = 0;
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float Humidity = 0;
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user_iic_read_byte_more_16bit(SHT3X_ADDR, SHT3X_READ_DATA, data_r, 6);
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for(uint8_t t=0; t<6; t++)
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{
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LOG_OUT("%x ",data_r[t]);
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}
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LOG_OUT("\r\n");
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if( SHT3X_CRC_Check(data_r, 2, data_r[2]) == 1)
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{
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if( SHT3X_CRC_Check(data_r+3, 2, data_r[5]) == 1)
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{
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LOG_OUT("SHT3X_CRC_Check ok\r\n");
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Temperature = data_r[0] << 8 | data_r[1];
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Humidity = data_r[3] << 8 | data_r[4];
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Temperature = (Temperature * 175.0 / 65535) - 45.0;
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Humidity = Humidity * 100.0 / 65535;
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LOG_OUT("Temperature=%f \r\n", Temperature);
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LOG_OUT("Humidity=%f \r\n", Humidity);
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}
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}
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return RT_EOK;
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}
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#else
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rt_size_t temper_read(rt_device_t dev, rt_off_t pos, void *buffer, rt_size_t size)
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{
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LOG_OUT("temper_read\r\n");
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uint8_t data_r[6] = {0};
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float Temperature = 0;
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float Humidity = 0;
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int temp =0;
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uint8_t temp_buff[4] = {0};
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//打开
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SHT3X_HIGH;
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SHT3X_SCL_HIGH;
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SHT3X_SDA_HIGH;
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rt_thread_mdelay(1000);
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user_iic_read_byte_more_16bit_extend(&iic_ctl_temper, SHT3X_ADDR, SHT3X_READ_DATA, data_r, 6);
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for(uint8_t t=0; t<6; t++)
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{
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LOG_OUT("%x ",data_r[t]);
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}
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LOG_OUT("\r\n");
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//关闭
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SHT3X_LOW;
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SHT3X_SCL_LOW;
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SHT3X_SDA_LOW;
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if( SHT3X_CRC_Check(data_r, 2, data_r[2]) == 1)
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{
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if( SHT3X_CRC_Check(data_r+3, 2, data_r[5]) == 1)
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{
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LOG_OUT("CRC_Check ok\r\n");
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Temperature = data_r[0] << 8 | data_r[1];
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Humidity = data_r[3] << 8 | data_r[4];
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Temperature = (Temperature * 175.0 / 65535) - 45.0;
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Humidity = Humidity * 100.0 / 65535;
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LOG_OUT("Temperature=%f \r\n", Temperature);
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LOG_OUT("Humidity=%f \r\n", Humidity);
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temp = (short int)((Temperature+0.05)*10);
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if(temp >= 0)
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{
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}
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else
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{
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temp = (-(temp))|0x8000;
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}
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temp_buff[0] = (temp>>8)&0xFF;
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temp_buff[1] = (temp)&0xFF;
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LOG_OUT("temp=%d \r\n", temp);
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temp = (int)((Humidity+0.05)*10);
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temp_buff[2] = (temp>>8)&0xFF;
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temp_buff[3] = (temp)&0xFF;
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LOG_OUT("hum=%d \r\n", temp);
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memcpy(buffer, temp_buff, 4);
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return 4;
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}
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}
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return RT_EOK;
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}
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#endif
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rt_size_t temper_write(rt_device_t dev, rt_off_t pos, void *buffer, rt_size_t size)
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{
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//LOG_OUT("temper_write\r\n");
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}
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rt_err_t temper_control(rt_device_t dev, int cmd, void *args)
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{
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//LOG_OUT("temper_control\r\n");
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return RT_EOK;
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}
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int bsp_temper_init(void)
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{
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bsp_temper_dev = rt_device_create(RT_Device_Class_Char, 1);
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if(bsp_temper_dev == RT_NULL)
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{
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LOG_OUT("bsp_temper_dev ERR!!!\r\n");
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}
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bsp_temper_dev->init = temper_init;
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bsp_temper_dev->open = temper_open;
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bsp_temper_dev->close = temper_close;
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bsp_temper_dev->read = temper_read;
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bsp_temper_dev->write = NULL;
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bsp_temper_dev->control = NULL;
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rt_device_register(bsp_temper_dev, "temper", RT_DEVICE_FLAG_RDWR);
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LOG_OUT("bsp_temper_init ok\r\n");
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return RT_EOK;
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}
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uint8_t SHT3X_CRC_Check(uint8_t *check_data, uint8_t num, uint8_t check_crc)
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{
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uint8_t bit = 0; // bit mask
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uint8_t crc = 0xFF; // calculated checksum
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uint8_t byteCtr = 0; // byte counter
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// calculates 8-Bit checksum with given polynomial x8+x5+x4+1
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for(byteCtr = 0; byteCtr < num; byteCtr++)
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{
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crc ^= (*(check_data+byteCtr));
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//crc校验，最高位是1就^0x31
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for(bit = 8; bit > 0; --bit)
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{
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if(crc & 0x80)
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crc = (crc << 1) ^ 0x31;
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else
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crc = (crc << 1);
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}
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}
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LOG_OUT("crc=%x \r\n", crc);
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if(crc==check_crc)
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return 1;
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else
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return 0;
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}
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