背景
9月份逛某论坛时，发现一个有意思的传感器RRH62000，此传感器号称可以监控室内大部分空气质量，瞬间就想到了多年前新家入住时特意买的甲醛监测仪，如果自己能做一个这样的设备，也是挺有意思的一件事。当时头脑一热，就申请了。到11月时，突然收到邮件说选中了，就赶紧拿回来把玩起来。
RRH62000目前释放出来的资料不多，但是搜索github上发现，其实瑞萨的fsp5.6已经有上传RRH62000的代码了（具体可以在链接中搜索RRH62000：Releases · renesas/fsp），也就是说，如果要适配RRH62000，如果使用瑞萨主控，基于目前rtthread上瑞萨的代码逻辑，我们需要把板卡fsp升级到5.6，之后开启rrh62000，再将rrh62000对接到rtthread的传感器框架中，便能够实现适配。
但是呢，通过查阅传感器部分的代码，我决定暂时放弃这一操作，原因是我并不认为目前fsp上的外围器件框架逻辑符合产品设计的需求。因为目前fsp上的rrh62000框架，I2C是独占式的，而实际项目设计中，I2C很少独占一路，而是多种器件共用一路I2C。
硬件配置
由于RRH62000独特的架构设计（供电需要5V，但通信却使用3.3V），我手头上能直接供5V并操作3.3V的板子并不多，只有野火的启明6M5，因此就用启明6M5来做RRH6200的适配。
I2C通信接口
启明6M5的typec端口上的串口可以配置成I2C1，如下图：
在调试时，仅仅需要将J35的跳冒拿开，并将RRH62000的I2C口接到此处即可。
供电部分
启明6M5的J29座子上有引出VCC_5V和GND，因此可以将供电引至该口。
软件设置
选定了硬件接口，那剩下的就是FSP的设置了，由于之前我已经把启明6M5大部分功能配好并合并到github主线仓库了，因此这里的配置，仅仅是通过FSP配置对应的硬件接口即可。
串口部分
FSP修改
rtt主线上目前配置的串口和I2C1所使用的接口冲突，因此我将此路串口切换至JTAG上的串口，以便调试。具体配置如下：
删除stacks中的uart4配置后，依次进行以下配置：
这部分配置完毕后，点击Generate Project Content生成配置。
menuconfig配置
fsp已经把uart4关闭，并打开了UART2，但是目前rtt默认的配置还是在uart4上，此时只需要进入menuconfig中，打开uart2，关闭uart4，并将调试口更换至uart2即可。具体修改如下：
在emu中输入menuconfig并回车，进行以下配置：
选择完毕后保存，并输入 scons --target=mdk5 生成新工程。此时编译运行，可发现finsh串口变成了uart2。
I2C1部分
FSP修改
I2C1部分和配置类似，具体配置方法如下：
之后点击Generate Project Content便可生成I2C1相关的配置。
menuconfig配置
同样的，虽然FSP已经启用了I2C1，但是rtt目前并由没启用I2C1，此时需要在menuconfig中启用I2C1，启用方法同uart，但操作位置有细微差异，具体差异如下：
选择完毕后保存，并输入 scons --target=mdk5 生成新工程。
至此，I2C1也被添加至工程中。
传感器代码添加
文件添加
所有驱动文件都按惯例，全部添加至bsp\renesas\libraries\HAL_Drivers\中，因为瑞萨所有的驱动看起来都是加在此处。
rrh62000.c
#include "rrh62000.h"
#define RRH62000_ADDR 0x69
/* Definitions of Timeout */
#define RM_RRH62000_TIMEOUT (100)
/* Definitions of Wait Time */
#define RM_RRH62000_WAIT_TIME_1000 (1000)
/* Definitions of Retry max counts */
#define RM_RRH62000_RETRY_MAX_COUNTS (5)
#define RM_RRH62000_RETRY_ZMOD_CLEANING_COUNTS (60 + 10) // ZMOD cleaning time (60s) + buffer (10s)
/* Definitions of Command */
#define RM_RRH62000_COMMAND_READ (0x00)
#define RM_RRH62000_COMMAND_DATA (0x40)
#define RM_RRH62000_COMMAND_RESET (0x52)
#define RM_RRH62000_COMMAND_MAVE (0x53)
#define RM_RRH62000_COMMAND_SPEEDFAN (0x63)
#define RM_RRH62000_COMMAND_ARGVER (0x73)
#define RM_RRH62000_COMMAND_CSTATUS (0x74)
#define RM_RRH62000_COMMAND_FWVAR (0x75)
/* Definitions of Reset */
#define RM_RRH62000_RESET_VALUE (0x81)
/* Definitions of Cleaning Status */
#define RM_RRH62000_ZMOD_CLEAN_NOT_COMPLETE (0x00)
#define RM_RRH62000_ZMOD_CLEAN_COMPLETE (0x01)
/* Definitions of data size */
#define RM_RRH62000_LEN_MEASUREMENT_DATA (37)
/* Definitions of Mask */
#define RM_RRH62000_STATUS_MASK (0x01)
#define RM_RRH62000_HIGH_CONCENTRATION_MASK (0x01)
#define RM_RRH62000_DUST_ACCUMULATION_MASK (0x02)
#define RM_RRH62000_FAN_SPEED_MASK (0x04)
#define RM_RRH62000_FAN_MASK (0x08)
/* Definitions of Position */
#define RM_RRH62000_POSITION_STATUS (0)
#define RM_RRH62000_POSITION_NC_0P3 (2)
#define RM_RRH62000_POSITION_TEMPERATURE (24)
#define RM_RRH62000_POSITION_ECO2 (30)
#define RM_RRH62000_POSITION_IAQ (32)
/* Definitions of Calculation */
#define RM_RRH62000_CALC_CRC_INITIAL_VALUE (0xFF)
#define RM_RRH62000_CALC_CRC_DATA_LENGTH (36)
#define RM_RRH62000_CALC_DATA_STEP (2)
#define RM_RRH62000_CALC_CRC_8BITS_LENGTH (8)
#define RM_RRH62000_CACL_CRC_0X80 (0x80)
#define RM_RRH62000_CACL_CRC_MASK_MSB (0x80)
#define RM_RRH62000_CALC_CRC_POLYNOMIAL (0x31)
#define RM_RRH62000_CALC_CRC_FINAL_XOR (0x00)
#define RM_RRH62000_CALC_DECIMAL_VALUE_100 (100)
#define RM_RRH62000_CALC_DECIMAL_VALUE_10 (10)
/* Definitions of Shift */
#define RM_RRH62000_SHIFT_24 (24)
#define RM_RRH62000_SHIFT_16 (16)
#define RM_RRH62000_SHIFT_8 (8)
static rt_err_t rrh62000_read(struct rt_i2c_bus_device *bus, uint8_t reg, uint8_t *data, uint16_t len)
{
rt_uint8_t tmp = reg;
struct rt_i2c_msg msgs[2];
msgs[0].addr = RRH62000_ADDR; /* Slave address */
msgs[0].flags = RT_I2C_WR; /* Write flag */
msgs[0].buf = &tmp; /* Slave register address */
msgs[0].len = 1; /* Number of bytes sent */
msgs[1].addr = RRH62000_ADDR; /* Slave address */
msgs[1].flags = RT_I2C_RD; /* Read flag */
msgs[1].buf = data; /* Read data pointer */
msgs[1].len = len; /* Number of bytes read */
if (rt_i2c_transfer(bus, msgs, 2) != 2)
{
return -RT_ERROR;
}
return RT_EOK;
}
static rt_err_t rrh62000_write(struct rt_i2c_bus_device *bus, uint8_t reg, uint8_t *data, uint16_t len)
{
struct rt_i2c_msg msgs[2];
uint8_t data1[5];
uint16_t i;
data1[0] = reg;
for (i = 0; i < len; i++)
{
data1[i + 1] = data[i];
}
msgs[0].addr = RRH62000_ADDR; /* Slave address */
msgs[0].flags = RT_I2C_WR; /* Write flag */
msgs[0].buf = data1; /* Slave register address */
msgs[0].len = len + 1; /* Number of bytes sent */
if (rt_i2c_transfer(bus, msgs, 1) != 1)
{
return -RT_ERROR;
}
return RT_EOK;
}
static rt_err_t rm_rrh62000_crc_execute (const uint8_t * const p_raw_data)
{
uint8_t crc;
const uint8_t * p_input_data;
uint8_t i;
uint8_t j;
/* Set pointer to input data */
p_input_data = &p_raw_data[0];
/* Set initial value */
crc = RM_RRH62000_CALC_CRC_INITIAL_VALUE;
/* Execute CRC */
for (i = 0; i < RM_RRH62000_CALC_CRC_DATA_LENGTH; i++)
{
/* Calculate XOR with input value */
crc ^= *p_input_data;
for (j = 0; j < RM_RRH62000_CALC_CRC_8BITS_LENGTH; j++)
{
if (RM_RRH62000_CACL_CRC_0X80 == (crc & RM_RRH62000_CACL_CRC_MASK_MSB))
{
/* If MSB is 1, calculate XOR with the polynomial. */
crc = (uint8_t) (crc << 1) ^ RM_RRH62000_CALC_CRC_POLYNOMIAL;
}
else
{
crc <<= 1;
}
}
p_input_data++;
}
/* Final XOR */
crc ^= RM_RRH62000_CALC_CRC_FINAL_XOR;
if(p_raw_data[RM_RRH62000_CALC_CRC_DATA_LENGTH] == crc)
{
return RT_EOK;
}
else
{
return -RT_ERROR;
}
}
static rt_err_t RM_RRH62000_DataCalculate (uint8_t * p_raw_data, struct rrh62000_data *p_rrh62000_data)
{
rt_err_t err = RT_EOK;
rt_uint32_t tmp_u32;
rm_air_sensor_single_data_t * p_sensor_data;
rt_uint32_t position;
/* Execute CRC */
err = rm_rrh62000_crc_execute(p_raw_data);
if(err != RT_EOK)
{
return err;
}
/* Set status data */
p_rrh62000_data->status =
(uint32_t) (((uint32_t) p_raw_data[1] << RM_RRH62000_SHIFT_8) | (uint32_t) p_raw_data[0]);
/* Set measurement results */
p_sensor_data = &p_rrh62000_data->nc_0p3;
for (position = RM_RRH62000_POSITION_NC_0P3;
position < RM_RRH62000_LEN_MEASUREMENT_DATA;
position += RM_RRH62000_CALC_DATA_STEP)
{
/* Calculate sensor data from measurement results (big-endian). */
tmp_u32 = (uint32_t) (((uint32_t) p_raw_data[position] << RM_RRH62000_SHIFT_8) |
(uint32_t) p_raw_data[position + 1]);
if (RM_RRH62000_POSITION_TEMPERATURE > position)
{
/* NC_x and PMx_x data. One decimal place. */
p_sensor_data->integer_part = tmp_u32 / RM_RRH62000_CALC_DECIMAL_VALUE_10;
p_sensor_data->decimal_part = tmp_u32 % RM_RRH62000_CALC_DECIMAL_VALUE_10;
}
else if ((RM_RRH62000_POSITION_ECO2 > position) || (RM_RRH62000_POSITION_IAQ == position))
{
/* Temperature, humidity, TVOC and IAQ data. Two decimal places. */
p_sensor_data->integer_part = tmp_u32 / RM_RRH62000_CALC_DECIMAL_VALUE_100;
p_sensor_data->decimal_part = tmp_u32 % RM_RRH62000_CALC_DECIMAL_VALUE_100;
}
else
{
/* eCO2 and Relative IAQ data. These data does not have a decimal part. */
p_sensor_data->integer_part = tmp_u32;
p_sensor_data->decimal_part = 0;
}
p_sensor_data++;
}
return RT_EOK;
}
rt_err_t rrh62000_read_measured_value(struct rt_i2c_bus_device *bus, struct rrh62000_data *data)
{
rt_uint8_t buf[37];
rt_uint32_t len = 37;
if(rrh62000_read(bus, RM_RRH62000_COMMAND_READ, buf, len) != RT_EOK) {
return -RT_ERROR;
}
return RM_RRH62000_DataCalculate(buf, data);
}
rt_err_t rrh62000_read_data_status(struct rt_i2c_bus_device *bus, rt_bool_t *isDataReady)
{
rt_uint8_t buf[1];
if(rrh62000_read(bus, RM_RRH62000_COMMAND_DATA, buf, 1) != RT_EOK) {
return -RT_ERROR;
}
*isDataReady = buf[0];
return RT_EOK;
}
rt_err_t rrh62000_sleep_set(struct rt_i2c_bus_device *bus, rt_bool_t isSleep)
{
rt_uint8_t buf[1];
if(isSleep)
{
buf[0] = 0x00;
}
else
{
buf[0] = 0x80;
}
if(rrh62000_write(bus, 0x50, buf, 1) != RT_EOK) {
return -RT_ERROR;
}
return RT_EOK;
}
rt_err_t rrh62000_sleep_get(struct rt_i2c_bus_device *bus, rt_bool_t *isSleep)
{
rt_uint8_t buf[1];
if(rrh62000_read(bus, 0x50, buf, 1) != RT_EOK) {
return -RT_ERROR;
}
if(buf[0])
{
*isSleep = 0;
}
else
{
*isSleep = 1;
}
return RT_EOK;
}
rt_err_t rrh62000_start_dust_cleaning(struct rt_i2c_bus_device *bus)
{
rt_uint8_t buf[1] = {0x01};
if(rrh62000_write(bus, 0x51, buf, 1) != RT_EOK) {
return -RT_ERROR;
}
return RT_EOK;
}
rt_err_t rrh62000_reset(struct rt_i2c_bus_device *bus)
{
rt_uint8_t buf[1] = {0x81};
if(rrh62000_write(bus, RM_RRH62000_COMMAND_RESET, buf, 1) != RT_EOK) {
return -RT_ERROR;
}
return RT_EOK;
}
rt_err_t rrh62000_moving_average_set(struct rt_i2c_bus_device *bus, uint8_t time)
{
rt_uint8_t buf[1];
if(time > 60)
{
time = 60;
}
else if(time < 1)
{
time = 1;
}
buf[0] = time;
if(rrh62000_write(bus, RM_RRH62000_COMMAND_MAVE, buf, 1) != RT_EOK) {
return -RT_ERROR;
}
return RT_EOK;
}
rt_err_t rrh62000_moving_average_get(struct rt_i2c_bus_device *bus, uint8_t *time)
{
rt_uint8_t buf[1];
if(rrh62000_read(bus, RM_RRH62000_COMMAND_MAVE, buf, 1) != RT_EOK) {
return -RT_ERROR;
}
*time = buf[0];
return RT_EOK;
}
rt_err_t rrh62000_clean_interval_time_set(struct rt_i2c_bus_device *bus, uint16_t time)
{
rt_uint8_t buf[1];
if(time > 60480)
{
time = 60480;
}
buf[0] = (time >> 8);
if(rrh62000_write(bus, 0x5A, buf, 1) != RT_EOK) {
return -RT_ERROR;
}
buf[0] = (time & 0x00FF);
if(rrh62000_write(bus, 0x5B, buf, 1) != RT_EOK) {
return -RT_ERROR;
}
return RT_EOK;
}
rt_err_t rrh62000_clean_interval_time_get(struct rt_i2c_bus_device *bus, uint16_t *time)
{
rt_uint8_t buf[2];
if(rrh62000_read(bus, 0x5A, buf, 1) != RT_EOK) {
return -RT_ERROR;
}
if(rrh62000_read(bus, 0x5B, buf + 1, 1) != RT_EOK) {
return -RT_ERROR;
}
*time = ((uint16_t)buf[0] << 8) + buf[1];
return RT_EOK;
}
rt_err_t rrh62000_auto_clean_time_set(struct rt_i2c_bus_device *bus, uint8_t time)
{
rt_uint8_t buf[1];
if(time > 60)
{
time = 60;
}
buf[0] = time;
if(rrh62000_write(bus, 0x5C, buf, 1) != RT_EOK) {
return -RT_ERROR;
}
return RT_EOK;
}
rt_err_t rrh62000_auto_clean_time_get(struct rt_i2c_bus_device *bus, uint8_t *time)
{
rt_uint8_t buf[1];
if(rrh62000_read(bus, 0x5C, buf, 1) != RT_EOK) {
return -RT_ERROR;
}
*time = buf[0];
return RT_EOK;
}
rt_err_t rrh62000_fan_speed_set(struct rt_i2c_bus_device *bus, uint8_t speed)
{
rt_uint8_t buf[1];
if(speed > 100)
{
speed = 100;
}
else if(speed < 60)
{
speed = 60;
}
buf[0] = speed;
if(rrh62000_write(bus, RM_RRH62000_COMMAND_SPEEDFAN, buf, 1) != RT_EOK) {
return -RT_ERROR;
}
return RT_EOK;
}
rt_err_t rrh62000_fan_speed_get(struct rt_i2c_bus_device *bus, uint8_t *speed)
{
rt_uint8_t buf[1];
if(rrh62000_read(bus, RM_RRH62000_COMMAND_SPEEDFAN, buf, 1) != RT_EOK) {
return -RT_ERROR;
}
*speed = buf[0];
return RT_EOK;
}
rt_err_t rrh62000_read_mox_resistance(struct rt_i2c_bus_device *bus, uint32_t *data)
{
rt_uint8_t buf[4];
if(rrh62000_read(bus, 0x71, buf, 4) != RT_EOK) {
return -RT_ERROR;
}
*data = (uint32_t)buf[0] << 24;
*data += (uint32_t)buf[1] << 16;
*data += (uint32_t)buf[2] << 8;
*data += (uint32_t)buf[3] << 0;
return RT_EOK;
}
rt_err_t rrh62000_read_uid(struct rt_i2c_bus_device *bus, struct rrh62000_uid *data)
{
rt_uint8_t buf[6];
if(rrh62000_read(bus, 0x72, buf, 6) != RT_EOK) {
return -RT_ERROR;
}
rt_memcpy(&data->uid, buf, 6);
return RT_EOK;
}
rt_err_t rrh62000_read_algoritm_verison(struct rt_i2c_bus_device *bus, struct rrh62000_algoversion *data)
{
rt_uint8_t buf[3];
if(rrh62000_read(bus, RM_RRH62000_COMMAND_ARGVER, buf, 3) != RT_EOK) {
return -RT_ERROR;
}
data->major = buf[0];
data->minor = buf[1];
data->patch = buf[2];
return RT_EOK;
}
rt_err_t rrh62000_read_TVOC_sensor_clean_status(struct rt_i2c_bus_device *bus, rt_bool_t *isComplete)
{
rt_uint8_t buf[1];
if(rrh62000_read(bus, RM_RRH62000_COMMAND_CSTATUS, buf, 1) != RT_EOK) {
return -RT_ERROR;
}
*isComplete = buf[0];
return RT_EOK;
}
rt_err_t rrh62000_read_firmware_verison(struct rt_i2c_bus_device *bus, struct rrh62000_firmwareversion *data)
{
rt_uint8_t buf[2];
if(rrh62000_read(bus, RM_RRH62000_COMMAND_FWVAR, buf, 2) != RT_EOK) {
return -RT_ERROR;
}
data->major = buf[0];
data->minor = buf[1];
return RT_EOK;
}rrh_62000.h
#include <rtdevice.h>
#include <rtthread.h>
typedef struct st_rm_air_sensor_single_data
{
uint32_t integer_part; ///< Integer part of sensor data.
uint32_t decimal_part; ///< Decimal part of sensor data.
} rm_air_sensor_single_data_t;
/** AIR SENSOR data block */
struct rrh62000_data
{
uint32_t status;
rm_air_sensor_single_data_t nc_0p3; ///< Number concentration of particle size 0.3 um - 10 um [1/cm3]
rm_air_sensor_single_data_t nc_0p5; ///< Number concentration of particle size 0.5 um - 10 um [1/cm3]
rm_air_sensor_single_data_t nc_1; ///< Number concentration of particle size 1 um - 10 um [1/cm3]
rm_air_sensor_single_data_t nc_2p5; ///< Number concentration of particle size 2.5 um - 10 um [1/cm3]
rm_air_sensor_single_data_t nc_4; ///< Number concentration of particle size 4 um - 10 um [1/cm3]
rm_air_sensor_single_data_t pm1_1; ///< Mass concentration of particle size 0.3 um - 1 um with reference to KCl particle [um/cm3]
rm_air_sensor_single_data_t pm2p5_1; ///< Mass concentration of particle size 0.3 um - 2.5 um with reference to KCl particle [um/cm3]
rm_air_sensor_single_data_t pm10_1; ///< Mass concentration of particle size 0.3 um - 10 um with reference to KCl particle [um/cm3]
rm_air_sensor_single_data_t pm1_2; ///< Mass concentration of particle size 0.3 um - 1 um with reference to cigarette smoke [um/cm3]
rm_air_sensor_single_data_t pm2p5_2; ///< Mass concentration of particle size 0.3 um - 2.5 um with reference to cigarette smoke [um/cm3]
rm_air_sensor_single_data_t pm10_2; ///< Mass concentration of particle size 0.3 um - 10 um with reference to cigarette smoke [um/cm3]
rm_air_sensor_single_data_t temperature; ///< Temperature [Celsius]
rm_air_sensor_single_data_t humidity; ///< Humidity [%RH]
rm_air_sensor_single_data_t tvoc; ///< Total volatile organic compounds (TVOC) concentrations [mg/m3]
rm_air_sensor_single_data_t eco2; ///< Estimated carbon dioxide (eCO2) level [ppm]
rm_air_sensor_single_data_t iaq; ///< Indoor Air Quality level according to UBA
rm_air_sensor_single_data_t rel_iaq; ///< Relative IAQ
};
rt_err_t rrh62000_read_measured_value(struct rt_i2c_bus_device *bus, struct rrh62000_data *data);
rt_err_t rrh62000_read_data_status(struct rt_i2c_bus_device *bus, rt_bool_t *isDataReady);
rt_err_t rrh62000_sleep_set(struct rt_i2c_bus_device *bus, rt_bool_t isSleep);
rt_err_t rrh62000_sleep_get(struct rt_i2c_bus_device *bus, rt_bool_t *isSleep);
rt_err_t rrh62000_start_dust_cleaning(struct rt_i2c_bus_device *bus);
rt_err_t rrh62000_reset(struct rt_i2c_bus_device *bus);
rt_err_t rrh62000_moving_average_set(struct rt_i2c_bus_device *bus, uint8_t time);
rt_err_t rrh62000_moving_average_get(struct rt_i2c_bus_device *bus, uint8_t *time);
rt_err_t rrh62000_clean_interval_time_set(struct rt_i2c_bus_device *bus, uint16_t time);
rt_err_t rrh62000_clean_interval_time_get(struct rt_i2c_bus_device *bus, uint16_t *time);
rt_err_t rrh62000_auto_clean_time_set(struct rt_i2c_bus_device *bus, uint8_t time);
rt_err_t rrh62000_auto_clean_time_get(struct rt_i2c_bus_device *bus, uint8_t *time);
rt_err_t rrh62000_fan_speed_set(struct rt_i2c_bus_device *bus, uint8_t speed);
rt_err_t rrh62000_fan_speed_get(struct rt_i2c_bus_device *bus, uint8_t *speed);
rt_err_t rrh62000_read_mox_resistance(struct rt_i2c_bus_device *bus, uint32_t *data);
struct rrh62000_uid{
char uid[6];
};
rt_err_t rrh62000_read_uid(struct rt_i2c_bus_device *bus, struct rrh62000_uid *data);
struct rrh62000_algoversion{
char major;
char minor;
char patch;
};
rt_err_t rrh62000_read_algoritm_verison(struct rt_i2c_bus_device *bus, struct rrh62000_algoversion *data);
rt_err_t rrh62000_read_TVOC_sensor_clean_status(struct rt_i2c_bus_device *bus, rt_bool_t *isComplete);
struct rrh62000_firmwareversion{
char major;
char minor;
};
rt_err_t rrh62000_read_firmware_verison(struct rt_i2c_bus_device *bus, struct rrh62000_firmwareversion *data);drv_rrh62000.c
#include <drivers/sensor.h>
#include "hal_data.h"
#include "rrh62000.h"
struct sensor_device {
rt_bool_t openCount;
struct rt_i2c_bus_device * dev;
struct rrh62000_data data;
};
static rt_ssize_t _get_data(rt_sensor_t sensor, struct rt_sensor_data *data)
{
struct sensor_device *dev = sensor->parent.user_data;
rt_bool_t isDataReady = RT_FALSE;
if (sensor->info.type == RT_SENSOR_CLASS_TEMP)
{
if((rrh62000_read_data_status(dev->dev, &isDataReady) == RT_EOK) && (isDataReady))
{
rrh62000_read_measured_value(dev->dev, &dev->data);
}
}
if (sensor->info.type == RT_SENSOR_CLASS_TEMP)
{
data->data.temp = (dev->data.temperature.integer_part << 16) + dev->data.temperature.decimal_part;
data->timestamp = rt_sensor_get_ts();
return 1;
}
return 0;
}
static rt_ssize_t fetch_data(struct rt_sensor_device *sensor, void *buf, rt_size_t len)
{
RT_ASSERT(buf);
if (sensor->config.mode == RT_SENSOR_MODE_POLLING)
return _get_data(sensor, buf);
else
return 0;
}
static rt_err_t _set_power(struct rt_sensor_device *sensor, void *args)
{
struct sensor_device *dev = sensor->parent.user_data;
rt_uint8_t power = *(uint8_t *)args;
//fsp_err_t ret;
rt_err_t ret;
rt_bool_t isTVOCCLean = RT_FALSE;
int count = 70; // 70s
if(power == RT_SENSOR_POWER_DOWN)
{
if(dev->openCount != 0)
{
dev->openCount--;
}
}
else
{
if(dev->openCount == 0)
{
do
{
if(rrh62000_read_TVOC_sensor_clean_status(dev->dev, &isTVOCCLean) == RT_EOK)
{
if(isTVOCCLean == RT_FALSE)
{
rt_thread_mdelay(1000);
count--;
}
}
}while((isTVOCCLean == RT_FALSE) && (count--));
if(count == 0)
{
goto RET;
}
ret = rrh62000_reset(dev->dev);
if(ret != RT_EOK)
{
rt_kprintf("open failed %d\n\r",ret);
goto RET;
}
rt_thread_mdelay(1000);
ret = rrh62000_moving_average_set(dev->dev, 1);
ret = rrh62000_fan_speed_set(dev->dev, 60);
}
dev->openCount++;
}
return RT_EOK;
RET:
return -RT_ERROR;
}
static rt_err_t control(struct rt_sensor_device *sensor, int cmd, void *args)
{
rt_err_t result = RT_EOK;
switch (cmd)
{
case RT_SENSOR_CTRL_GET_ID:
// TODO: get device id
// result = xxxx(sensor, args);
break;
case RT_SENSOR_CTRL_GET_INFO:
// TODO: get info
// result = xxxx(sensor, args);
break;
case RT_SENSOR_CTRL_SET_RANGE:
// TODO: set test range
// result = xxxx(sensor, args);
break;
case RT_SENSOR_CTRL_SET_ODR:
// TODO: set frequency
// result = xxxx(sensor, args);
break;
case RT_SENSOR_CTRL_SET_MODE:
// TODO: set work mode
// result = xxxx(sensor, args);
break;
case RT_SENSOR_CTRL_SET_POWER:
// TODO: set power mode
result = _set_power(sensor, args);
break;
case RT_SENSOR_CTRL_SELF_TEST:
// TODO: process self test
// result = xxxx(sensor);
break;
default:
return -RT_ERROR;
}
return result;
}
static struct rt_sensor_ops sensor_ops =
{
fetch_data,
control
};
struct sensor_device * rrh62000_param_init(void)
{
struct sensor_device *dev;
struct rrh62000_firmwareversion fwVersion;
struct rrh62000_algoversion algoVersion;
dev = rt_calloc(1, sizeof(struct sensor_device));
if(!dev)
{
goto exit;
}
rt_memset(dev, 0x00, sizeof(struct sensor_device));
dev->dev = (struct rt_i2c_bus_device *)rt_device_find("i2c1");
if(dev->dev == RT_NULL)
{
goto exit;
}
if(rrh62000_read_firmware_verison(dev->dev, &fwVersion) != RT_EOK)
{
goto exit;
}
if(rrh62000_read_algoritm_verison(dev->dev, &algoVersion) != RT_EOK)
{
goto exit;
}
rt_kprintf("rrh62000 firmware version %d.%d\n\r", fwVersion.major, fwVersion.minor);
rt_kprintf("rrh62000 algoritm version %d.%d.%d\n\r", algoVersion.major, algoVersion.minor, algoVersion.patch);
return dev;
exit:
if(dev)
rt_free(dev);
return RT_NULL;
}
int rt_hw_init(const char *name, struct rt_sensor_config *cfg)
{
rt_int8_t result;
rt_sensor_t sensor = RT_NULL;
struct sensor_device *dev;
dev = rrh62000_param_init();
if(dev == RT_NULL)
{
goto __exit;
}
/* sensor register */
sensor = rt_calloc(1, sizeof(struct rt_sensor_device));
if (sensor == RT_NULL)
goto __exit;
sensor->info.type = RT_SENSOR_CLASS_TEMP; // Set real type
sensor->info.vendor = RT_SENSOR_VENDOR_UNKNOWN; // Set real vendor
sensor->info.model = name; // set real model name
sensor->info.unit = RT_SENSOR_UNIT_DCELSIUS; // set to real unit flag
sensor->info.intf_type = RT_SENSOR_INTF_I2C; // Set interface type
sensor->info.range_max = 0xFFFF; // Set to range max
sensor->info.range_min = 0x0000; // Set to range min
sensor->info.period_min = 50; // Set frequency
rt_memcpy(&sensor->config, cfg, sizeof(struct rt_sensor_config));
sensor->ops = &sensor_ops;
result = rt_hw_sensor_register(sensor, name, RT_DEVICE_FLAG_RDONLY, dev);
if (result != RT_EOK)
{
goto __exit;
}
return RT_EOK;
__exit:
if (sensor)
rt_free(sensor);
if(dev)
rt_free(dev);
return -RT_ERROR;
}
static int rrh62000_device_register(void)
{
struct rt_sensor_config cfg = {
.mode = RT_SENSOR_MODE_POLLING,
.power = RT_SENSOR_POWER_DOWN,
};
rt_hw_init("rrh62000", &cfg);
return RT_EOK;
}
INIT_DEVICE_EXPORT(rrh62000_device_register);
#if 1
#define RRH_TEMP_DEVICE_NAME "temp_rrh"
void rrh6200_temp_read(void)
{
rt_device_t dev = rt_device_find(RRH_TEMP_DEVICE_NAME);
rt_err_t result;
rt_uint32_t len;
struct rt_sensor_data data;
if(!dev)
{
rt_kprintf("No device name %s\n\r", RRH_TEMP_DEVICE_NAME);
return;
}
result = rt_device_open(dev,RT_DEVICE_FLAG_RDONLY);
if(result != RT_EOK)
{
rt_kprintf("Open %s Fail\n\r", RRH_TEMP_DEVICE_NAME);
return;
}
len = rt_device_read(dev, 0 ,&data,1);
if(len)
{
rt_kprintf("Temp %d.%d \n\r", data.data.temp >> 16, data.data.temp & 0x0000FFFF);
}
result = rt_device_close(dev);
if(result != RT_EOK)
{
rt_kprintf("Close %s Fail\n\r", RRH_TEMP_DEVICE_NAME);
return;
}
}
MSH_CMD_EXPORT(rrh6200_temp_read, rrh62000 temprate sample);
#endif编译选项修改
虽然代码已经添加到目录里了，但是工程并不会编译，此时需要我们手动修改脚本，让工程自动将这些文件导入工程，具体修改如下：
bsp\renesas\ebf_qi_min_6m5\board\Kconfig
bsp\renesas\libraries\HAL_Drivers\SConscript
menuconfig配置
上面添加完毕后，我们还需要去menuconfig中将此传感器启用，具体修改方法如下：
配置完毕后保存，并输入 scons --target=mdk5生成新工程并编译
运行结果
\ | / - RT - Thread Operating System / | \ 5.2.0 build Nov 28 2024 22:19:37 2006 - 2024 Copyright by RT-Thread team [I/I2C] I2C bus [i2c1] registered rrh62000 firmware version 1.0 rrh62000 algoritm version 3.2.0 [I/sensor] rt_sensor[temp_rrh62000] init success Hello RT-Thread! msh >r reboot rrh6200_temp_read msh >rr rrh6200_temp_read msh >rrh6200_temp_read Temp 0.0 msh >rrh6200_temp_read Temp 0.0 msh >rrh6200_temp_read Temp 0.0 msh >rrh6200_temp_read Temp 22.17 msh >rrh6200_temp_read Temp 22.17 msh >rrh6200_temp_read Temp 22.17 msh >rrh6200_temp_read Temp 22.12 msh >rrh6200_temp_read Temp 22.12 msh >rrh6200_temp_read Temp 22.12 msh >rrh6200_temp_read Temp 22.12 msh >rrh6200_temp_read Temp 22.7 msh >rrh6200_temp_read Temp 22.7 msh >rrh6200_temp_read Temp 22.7 msh >rrh6200_temp_read Temp 22.7 msh >rrh6200_temp_read Temp 22.3 msh >rrh6200_temp_read Temp 22.3
后续计划
目前仅仅是初步把温度传感器部分打通了，后续将陆续把剩余的RTT支持的传感器类型全打通。另外，由于搞得比较匆忙，其实代码封装很多地方都不太合适，还需要进一步完善，完善后看怎么推到rtt的软件包里面去。
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