78 lines
2.7 KiB
C
78 lines
2.7 KiB
C
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
|
|
#include "driver/i2c.h"
|
|
#include "embedded_display.c"
|
|
#include "esp_log.h"
|
|
#include "i2c.c"
|
|
|
|
#define ACK_CHECK_EN 0x1 /*!< I2C master will check ack from slave*/
|
|
#define ACK_CHECK_DIS 0x0 /*!< I2C master will not check ack from slave */
|
|
#define ACK_VAL 0x0 /*!< I2C ack value */
|
|
#define NACK_VAL 0x1 /*!< I2C nack value */
|
|
|
|
#define GX21M15_TEMP_POINTER_VALUE 0b00 // 温度寄存器
|
|
#define GX21M15_CONF_POINTER_VALUE 0b01 // 配置寄存器
|
|
#define GX21M15_THYST_POINTER_VALUE 0b10 // 回滞寄存器
|
|
#define GX21M15_TOS_POINTER_VALUE 0b11 // 过温关断寄存器
|
|
|
|
#define DEFAULT_TEMPERATURE -999 // 过温关断寄存器
|
|
#define TEMPERATURE_TAG "temperature"
|
|
|
|
void fetch_temperature(void* arg) {
|
|
esp_err_t error;
|
|
float temperature = DEFAULT_TEMPERATURE;
|
|
char temperature_str[20];
|
|
uint8_t temperature_buffer[] = {0, 0};
|
|
display_fill_rect(0, 0, 128, 2, 0x00);
|
|
for (;;) {
|
|
i2c_cmd_handle_t cmd = i2c_cmd_link_create();
|
|
i2c_master_start(cmd);
|
|
i2c_master_write_byte(cmd, GX21M15_ADDRESS << 1 | I2C_MASTER_WRITE,
|
|
ACK_CHECK_EN);
|
|
i2c_master_write_byte(cmd, 0, ACK_CHECK_EN);
|
|
i2c_master_start(cmd);
|
|
i2c_master_write_byte(cmd, GX21M15_ADDRESS << 1 | I2C_MASTER_READ, ACK_VAL);
|
|
i2c_master_read_byte(cmd, &(temperature_buffer[0]), ACK_VAL);
|
|
i2c_master_read_byte(cmd, &(temperature_buffer[1]), NACK_VAL);
|
|
i2c_master_stop(cmd);
|
|
error =
|
|
i2c_master_cmd_begin(I2C_MASTER_NUM, cmd, 1000 / portTICK_PERIOD_MS);
|
|
i2c_cmd_link_delete(cmd);
|
|
if (error != ESP_OK) {
|
|
ESP_LOGW(TEMPERATURE_TAG, "read failed. %x", error);
|
|
} else {
|
|
if (temperature_buffer[0] == 0xff) {
|
|
if (temperature == DEFAULT_TEMPERATURE) {
|
|
sprintf(temperature_str, "Temp: Loading");
|
|
} else {
|
|
sprintf(temperature_str, "Temp: %.3f.", temperature);
|
|
}
|
|
} else {
|
|
if (temperature_buffer[0] >> 7) {
|
|
temperature = -(((((~temperature_buffer[0]) & 0x7f) << 3) |
|
|
((~temperature_buffer[1] >> 5) & 0x07)) +
|
|
1) *
|
|
0.125;
|
|
} else {
|
|
temperature =
|
|
(temperature_buffer[0] << 3 | temperature_buffer[1] >> 5) * 0.125;
|
|
}
|
|
sprintf(temperature_str, "Temp: %2.3f", temperature);
|
|
}
|
|
display_print8_str(8, 0, temperature_str);
|
|
}
|
|
vTaskDelay(pdMS_TO_TICKS(2000));
|
|
}
|
|
display_fill_rect(0, 0, 128, 2, 0x00);
|
|
}
|
|
|
|
void auto_fetch_temperature() {
|
|
if (is_temperature_online == 0) {
|
|
ESP_LOGW(TEMPERATURE_TAG, "temperature is offline");
|
|
return;
|
|
}
|
|
ESP_LOGI(TEMPERATURE_TAG, "auto_fetch_temperature");
|
|
xTaskCreate(fetch_temperature, "temperature", 2048, NULL, 10, NULL);
|
|
}
|