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| 两侧同时换到之前的修订记录 前一修订版 后一修订版 | 前一修订版 | ||
|
mp_pwm_led [2021/10/16 15:02] gongyusu |
mp_pwm_led [2023/08/01 09:54] (当前版本) group003 |
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|---|---|---|---|
| 行 30: | 行 30: | ||
| # led-pwm.py | # led-pwm.py | ||
| - | # POT - Pico GPIO 26 ADC0 | + | # POT - Pico GPIO 28 ADC2 |
| - | # RED LED - Pico GPIO 19 | + | # RED LED - Pico GPIO 25 |
| # EETree Info&Tech 2021 | # EETree Info&Tech 2021 | ||
| 行 41: | 行 41: | ||
| import utime | import utime | ||
| - | led_red = machine.PWM(machine.Pin(19)) | + | led_red = machine.PWM(machine.Pin(25)) |
| - | potentiometer = machine.ADC(26) | + | potentiometer = machine.ADC(28) |
| led_red.freq(1000) | led_red.freq(1000) | ||
| 行 89: | 行 89: | ||
| </code> | </code> | ||
| PWM是软件PWM，它可以设置在任意管脚上。初步测试过Pin0, 15, 16等等。都具有相类似波形。 | PWM是软件PWM，它可以设置在任意管脚上。初步测试过Pin0, 15, 16等等。都具有相类似波形。 | ||
| + | |||
| + | |||
| + | |||
| + | ### 3. 呼吸灯的例子 | ||
| + | |||
| + | <code python> | ||
| + | from machine import Pin, PWM,Timer | ||
| + | |||
| + | LED = PWM(Pin(25)) | ||
| + | |||
| + | n = 0 | ||
| + | |||
| + | def breathing(t): | ||
| + | global n | ||
| + | LED.duty_u16(abs(32000- n*1000)) | ||
| + | n = (n + 1) % 64 | ||
| + | |||
| + | T0 = Timer(-1) | ||
| + | T0.init(period=20, mode=Timer.PERIODIC, callback=breathing) | ||
| + | </code> | ||
| ### 3. Maker.io上的文章 | ### 3. Maker.io上的文章 | ||
| 行 169: | 行 189: | ||
| </code> | </code> | ||
| + | ## 返回目录 | ||
| + | [[pico_micropython|MicroPython编程PICO训练板]] | ||