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Alex B.
2025-07-05 23:34:11 -04:00
parent 09a256a7d8
commit de53763ba6
3 changed files with 46 additions and 5 deletions
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2
ESP-IDF_Robot/tutorial/docs/build/simplepdf/.buildinfo vendored
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@@ -1,4 +1,4 @@
# Sphinx build info version 1 # Sphinx build info version 1
# This file records the configuration used when building these files. When it is not found, a full rebuild will be done. # This file records the configuration used when building these files. When it is not found, a full rebuild will be done.
config: 4cc9ee0f9f77e14cf8c7713a4bf8af68 config: 810e69613b4eb0d1d8e31e14492e94f3
tags: 62a1e7829a13fc7881b6498c52484ec0 tags: 62a1e7829a13fc7881b6498c52484ec0

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ESP-IDF_Robot/tutorial/docs/build/simplepdf/esp-idf_espnow_rc-car.pdf vendored
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49
ESP-IDF_Robot/tutorial/docs/build/simplepdf/index.html vendored
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@@ -333,9 +333,9 @@ Based on this constraint, the RC car can only move front, back, and turn/rotate
<strong> <strong>
PWM PWM
</strong> </strong>
(Pulse Width Modulation) is a technique used to simulate analog voltage levels using ddiscrete igital signals. It works by rapidly switching a stands for Pulse Width Modulation. It is a technique used to simulate analog voltage levels using discrete digital signals. It works by
digital pin between HIGH (on) and LOW (off) states at a fixed frequency (often, at base frequency of 5 kHz). The duty cycle&mdash;the percentage of time the signal is HIGH in one rapidly switching a digital GPIO pin between HIGH (on) and LOW (off) states at a fixed frequency (often, at base frequency of 5 kHz).
cycle determines the effective voltage delivered to a device. The duty cycle&mdash;the percentage of time the signal is HIGH in one cycle determines the effective voltage delivered to a device.
</p> </p>
<p> <p>
A higher duty cycle increases the motor speed, and a lower duty cycle decreases the motor speed. This allows for fine-grained speed control A higher duty cycle increases the motor speed, and a lower duty cycle decreases the motor speed. This allows for fine-grained speed control
@@ -343,7 +343,7 @@ without needing analog voltage regulators.
</p> </p>
</div> </div>
<p> <p>
A pair of PWM channels are required for defining rotation speed and direction of the DC motors on each side. A pair of PWM channels are used per DC motor for defining their rotation speed and direction on each side.
In particular, In particular,
<strong> <strong>
GPIO6 GPIO6
@@ -372,6 +372,47 @@ Similarly,
direction. direction.
Changing PWM on each channel determines the speed and direction of the RC car. Changing PWM on each channel determines the speed and direction of the RC car.
</p> </p>
<table class="docutils align-default">
<thead>
<tr class="row-odd">
<th class="head">
<p>
GPIO Num.
</p>
</th>
<th class="head">
<p>
State
</p>
</th>
<th class="head">
<p>
Function
</p>
</th>
</tr>
</thead>
<tbody>
<tr class="row-even">
<td>
<p>
GPIO6
GPIO4
</p>
</td>
<td>
<p>
PWM
</p>
</td>
<td>
<p>
Forward
</p>
</td>
</tr>
</tbody>
</table>
<p> <p>
The following images illustrate various PWM duty cycles registered by oscilloscope (duty cycles 0%, 48% and 91%, resp.). The following images illustrate various PWM duty cycles registered by oscilloscope (duty cycles 0%, 48% and 91%, resp.).
</p> </p>