翻译The TCS3701 features ambient light and color (RGB) sensing in parallel with proximity detect ion. The device comes in a low-profile and small footpr int, L2.5mm x W2.0mm x H0.5mm package. The Ambient Light and Color Sensing function provides five concurrent ambient light sensing channels: Red, Green, Blue, Clear, and Wideband. The RGB an d Clear channels have a UV/IR blocking filter. This architecture accurately measures ambient light and enables the calculation of illuminance, chromaticity, and color temperature to manage display appearance. The Proximity function synchronizes IR emission and detection to sense nearby objects. The internal IR LED driver needs to be connected to an external emitter. The architecture of the engine features self-maximizing dynamic range, ambient light subtraction, advanced crosstalk cancelation, 14-bit data output and interrupt-driven I²C communication. Sensitivity, power consumption, and noise can be optimized with adjustable IR LED timing and power. The proximity engine recognizes detect/release events and produces a configurable interrupt whenever the proximity result crosses upper or lower threshold settings.

TCS3701是一款同时具备环境光和彩色(RGB)感知以及近距离探测的器件。该器件采用低轮廓、小尺寸的封装，尺寸为L2.5mm x W2.0mm x H0.5mm。环境光和彩色感知功能提供五个同时进行的环境光感知通道：红色、绿色、蓝色、透明度和宽带。RGB和透明度通道带有紫外/红外阻挡滤光片。该架构可以准确测量环境光，并计算照度、色度和色温，以管理显示外观。近距离探测功能同步红外发射和检测，以感知附近物体。内部红外LED驱动器需要连接到外部发射器。引擎的架构具有自我最大化动态范围、环境光抵消、先进的串扰抵消、14位数据输出和中断驱动的I²C通信。通过可调的红外LED时序和功率，可以优化灵敏度、功耗和噪声。近距离探测引擎可以识别探测/释放事件，并在近距离探测结果穿过上限或下限阈值设置时产生可配置的中断。

相关问题

There is a light sensor on your picoprobe development board. This question asks you to use this sensor to measure the ambient light and to control the three LEDs on the picoprobe board to make a night light. Configure your program to perform the following steps, after printing the message from Question 1. The steps should be repeated every 1 second. raw ADC result in the format shown below: Light Sensor: Raw: _____ (insert the actual value) (15 marks) (b) Convert the raw value to a voltage and print out the voltage that you calculated in the format displayed below. At least one decimal place is required. Voltage: _____ V (insert the actual value) (10 marks) (c) Use this voltage to control the three-colour LED to show a white colour, when the light sensor is covered by a piece of paper (e.g. when the room is getting dark). The white-coloured light will go off, as soon as the ambient light is high again, i.e. when the light sensor is exposed to normal room light. This is reminiscent of an automatic night light.

Sure, here's how you can use the light sensor on the picoprobe development board to create a night light:

(a)
1. Initialize the ADC to read from the light sensor.
2. Read the raw ADC value from the light sensor.
3. Print out the raw ADC value in the format "Light Sensor: Raw: [value]".
4. Convert the raw ADC value to a voltage using the formula: voltage = (raw_value * 3.3) / 4095, where 3.3 is the maximum voltage and 4095 is the maximum raw ADC value.
5. Print out the voltage value in the format "Voltage: [value] V".
6. Use the voltage value to control the three-colour LED.

(b)
Here's some sample code to perform the above steps:

#include <stdio.h>
#include "pico/stdlib.h"
#include "hardware/adc.h"
#include "hardware/gpio.h"

#define LED_RED 25
#define LED_GREEN 26
#define LED_BLUE 27
#define LIGHT_SENSOR 2

int main() {
    stdio_init_all();
    adc_init();
    adc_gpio_init(LIGHT_SENSOR);
    adc_select_input(LIGHT_SENSOR);

    gpio_init(LED_RED);
    gpio_set_dir(LED_RED, GPIO_OUT);
    gpio_init(LED_GREEN);
    gpio_set_dir(LED_GREEN, GPIO_OUT);
    gpio_init(LED_BLUE);
    gpio_set_dir(LED_BLUE, GPIO_OUT);

    while (1) {
        uint16_t raw_value = adc_read();
        printf("Light Sensor: Raw: %d\n", raw_value);
        float voltage = (raw_value * 3.3) / 4095;
        printf("Voltage: %.1f V\n", voltage);

        if (voltage < 1.0) {  // dim the LEDs when the room is dark
            gpio_put(LED_RED, 255);
            gpio_put(LED_GREEN, 255);
            gpio_put(LED_BLUE, 255);
        } else {  // turn off the LEDs when there is enough ambient light
            gpio_put(LED_RED, 0);
            gpio_put(LED_GREEN, 0);
            gpio_put(LED_BLUE, 0);
        }

        sleep_ms(1000);
    }

    return 0;
}

(c)
In the above code, we are dimming all three LEDs to create white light when the room is dark and turning them off when there is enough ambient light. The threshold voltage for detecting darkness is set at 1.0 V in this example, but you can adjust it to suit your needs.

Redundant networking¶ You should conduct a high availability risk analysis to determine whether to use redundant switches such as Top of Rack (ToR) switches. In most cases, it is much more economical to use single switches with a small pool of spare switches to replace failed units than it is to outfit an entire data center with redundant switches. Applications should tolerate rack level outages without affecting normal operations since network and compute resources are easily provisioned and plentiful. Research indicates the mean time between failures (MTBF) on switches is between 100,000 and 200,000 hours. This number is dependent on the ambient temperature of the switch in the data center. When properly cooled and maintained, this translates to between 11 and 22 years before failure. Even in the worst case of poor ventilation and high ambient temperatures in the data center, the MTBF is still 2-3 years.

冗余网络
您应该进行高可用性风险分析，以确定是否使用冗余交换机，例如顶级交换机（ToR交换机）。在大多数情况下，与使用冗余交换机来配置整个数据中心相比，使用单个交换机并配备一小批备用交换机以替换故障单元的成本要低得多。由于网络和计算资源易于配置且丰富，应用程序应该能够容忍机架级别的故障，而不会影响正常运营。

研究表明，交换机的平均故障间隔时间（MTBF）在10万至20万小时之间。这个数字取决于数据中心中交换机的环境温度。在正确冷却和维护的情况下，这意味着在故障之前可以使用11到22年。即使在数据中心通风不良和环境温度较高的最糟糕情况下，MTBF仍为2-3年。