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Implemented CCS811 callbacks.

This commit is contained in:
imi415 2021-07-14 23:23:06 +08:00
parent c62d13149f
commit bc58bec619
Signed by: imi415
GPG Key ID: 17F01E106F9F5E0A
6 changed files with 186 additions and 0 deletions
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2
CMakeLists.txt
View File

@ -16,6 +16,7 @@ set(C_SOURCES
"src/impl/user_lvgl_impl.c"
"src/impl/user_stick_impl.c"
"src/impl/user_bme280_impl.c"
"src/impl/user_ccs811_impl.c"
"src/tasks/user_lvgl_task.c"
"src/tasks/user_clock_task.c"
"src/tasks/user_dht_task.c"
@ -31,6 +32,7 @@ set(C_INCLUDES
"lib/LittleVGL"
"lib/st7789_lcd"
"lib/bme280_dht"
"lib/ccs811_tvoc"
"include"
)

27
include/impl/user_ccs811_impl.h Normal file
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@ -0,0 +1,27 @@
#ifndef USER_CCS811_IMPL_H
#define USER_CCS811_IMPL_H
#include <stdint.h>
#include "drivers/user_gpio_driver.h"
#include "ccs811_tvoc.h"
typedef struct {
int i2cdev_fd;
uint8_t i2c_addr;
user_gpio_t *nwake_pin;
} user_ccs811_impl_t;
int user_ccs811_impl_init(user_ccs811_impl_t *impl);
int user_ccs811_impl_deinit(user_ccs811_impl_t *impl);
ccs811_ret_t user_ccs811_impl_read_register_cb(user_ccs811_impl_t *impl,
uint8_t reg, uint8_t *data,
uint8_t len);
ccs811_ret_t user_ccs811_impl_write_register_cb(user_ccs811_impl_t *impl,
uint8_t reg, uint8_t *data, uint8_t len);
#endif

11
misc/agent_config.cfg.example
View File

@ -13,6 +13,17 @@ agent: {
};
};
tvoc: {
i2c: {
path = "/dev/i2c-1";
addr = 0x58;
};
nwake_pin: {
path = "/dev/i2c-1";
line = 5;
};
};
lcd: {
spi: {
path = "/dev/spidev0.0";

12
misc/agent_config.cfg.pine64
View File

@ -11,6 +11,18 @@ agent: {
path = "/dev/i2c-1";
addr = 0x76;
};
tvoc: {
i2c: {
path = "/dev/i2c-1";
addr = 0x58;
};
nwake_pin: {
path = "/dev/i2c-1";
line = 5;
};
};
};
lcd: {

12
misc/agent_config.cfg.rpi4
View File

@ -11,6 +11,18 @@ agent: {
path = "/dev/i2c-1";
addr = 0x76;
};
tvoc: {
i2c: {
path = "/dev/i2c-1";
addr = 0x58;
};
nwake_pin: {
path = "/dev/i2c-1";
line = 5;
};
};
};
lcd: {

122
src/impl/user_ccs811_impl.c Normal file
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@ -0,0 +1,122 @@
#include <fcntl.h>
#include <linux/i2c-dev.h>
#include <sys/ioctl.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include "drivers/user_config_driver.h"
#include "utils/user_log_util.h"
#include "impl/user_ccs811_impl.h"
extern user_config_t g_config;
int user_ccs811_impl_init(user_ccs811_impl_t *impl) {
impl->nwake_pin = NULL;
char *nwake_gpio_path = user_config_lookup_string(&g_config, "agent.devices.tvoc.nwake_pin.path");
if(nwake_gpio_path == NULL) {
USER_LOG(USER_LOG_WARN, "Can not find nWAKE pin, assuming tied to low.");
} else {
int nwake_gpio_num = 0;
if(user_config_lookup_int(&g_config, "agent.devices.tvoc.nwake_pin.line", &nwake_gpio_num) != 0) {
USER_LOG(USER_LOG_ERROR, "Incomplete nWAKE pin configuration: no lines found, bailing out.");
return -1;
}
impl->nwake_pin = malloc(sizeof(user_gpio_t));
if(impl->nwake_pin == NULL) {
USER_LOG(USER_LOG_ERROR, "Failed to allocate memory.");
return -1;
}
if(user_gpio_init(impl->nwake_pin, nwake_gpio_path, nwake_gpio_num, 1) != 0) {
USER_LOG(USER_LOG_ERROR, "Failed to init nWAKE GPIO, path=%s, line=%d.", nwake_gpio_path, nwake_gpio_num);
return -1;
}
if(user_gpio_set(impl->nwake_pin, 0) != 0) {
USER_LOG(USER_LOG_ERROR, "Failed to set nWAKE value.");
return -1;
}
}
char *i2cdev_path =
user_config_lookup_string(&g_config, "agent.devices.tvoc.i2c.path");
if(i2cdev_path == NULL) return -1;
int i2c_slaveaddr = 0;
if(user_config_lookup_int(&g_config, "agent.devices.tvoc.i2c.addr",
&i2c_slaveaddr) != 0) {
USER_LOG(USER_LOG_ERROR, "Failed to lookup I2C device address.");
return -2;
}
if((impl->i2cdev_fd = open(i2cdev_path, O_RDWR)) < 0) {
USER_LOG(USER_LOG_ERROR, "Failed to open I2C device.");
return -3;
}
USER_LOG(USER_LOG_INFO, "Opened %s for read-write, fd=%d.", i2cdev_path, impl->i2cdev_fd);
impl->i2c_addr = i2c_slaveaddr & 0xFFU;
if(ioctl(impl->i2cdev_fd, I2C_SLAVE, impl->i2c_addr) < 0) {
int err = errno;
USER_LOG(USER_LOG_ERROR, "Failed to select I2C slave 0x%x, %s.", impl->i2c_addr, strerror(err));
close(impl->i2cdev_fd);
return -3;
}
return 0;
}
int user_ccs811_impl_deinit(user_ccs811_impl_t *impl) {
close(impl->i2cdev_fd);
if(impl->nwake_pin != NULL) {
user_gpio_deinit(impl->nwake_pin);
free(impl->nwake_pin);
}
return 0;
}
ccs811_ret_t user_ccs811_impl_delay_ms_cb(user_ccs811_impl_t *impl, uint32_t delay_ms) {
usleep(delay_ms * 1000);
return CCS_OK;
}
ccs811_ret_t user_ccs811_impl_read_register_cb(user_ccs811_impl_t *impl,
uint8_t reg, uint8_t *data,
uint8_t len) {
if(write(impl->i2cdev_fd, &reg, 0x01) < 1) {
USER_LOG(USER_LOG_WARN, "I2C write failed, reg=%d.", reg);
return CCS_FAIL;
}
if(read(impl->i2cdev_fd, data, len) < len) {
USER_LOG(USER_LOG_WARN, "I2C read failed, reg=%d.", reg);
return CCS_FAIL;
}
return CCS_OK;
}
ccs811_ret_t user_ccs811_impl_write_register_cb(user_ccs811_impl_t *impl,
uint8_t reg, uint8_t *data, uint8_t len) {
uint8_t *tx_buf = malloc(len + 1);
if(tx_buf == NULL) {
USER_LOG(USER_LOG_WARN, "Failed to alloc %d bytes, reg=%d", len, reg);
return CCS_FAIL;
}
tx_buf[0] = reg;
memcpy(&tx_buf[1], data, len);
if(write(impl->i2cdev_fd, tx_buf, len + 1) < len + 1) {
USER_LOG(USER_LOG_WARN, "I2C write failed, reg=%d.", reg);
return CCS_FAIL;
}
return CCS_OK;
}