ESP32

1 Overview

• CP2102 USB to UART Chip
• ESP32 Bluetooth and WiFi SoC
• Winbond 16MB SPI Flash
• 5V - 12V Power Supply

3 Quick Start

3.1 USB2UART driver

Quantum use the CP2102 USB to UART chip, you need to install the driver firstly. Accessing following url to get your driver:

• http://www.silabs.com/products/mcu/Pages/USBtoUARTBridgeVCPDrivers.aspx

3.2 Linux

Please refer to: https://github.com/espressif/esp-idf/blob/master/docs/linux-setup.rst

3.3 MAC OS

Please refer to: https://github.com/espressif/esp-idf/blob/master/docs/macos-setup.rst

3.4 Windows

Please refer to: https://github.com/espressif/esp-idf/blob/master/docs/windows-setup.rst

4 体系结构

ESP32 内部框图：

• Xtensa Instruction Set Architecture: http://0x04.net/~mwk/doc/xtensa.pdf
• http://ip.cadence.com/uploads/533/Cadence_Tensillica_Xtensa_LX6_ds-pdf

5 Xtensa ISA

The Xtensa instruction set is designed to meet the diverse requirements of dataplane processing.

This 32-bit architecture features a compact 16- and 24-bit instruction set with modeless switching for maximum power efficiency and performance.

The base instruction set has 80 RISC instructions and includes a 32-bit ALU, up to 64 general-purpose 32-bit registers, and six special-purpose registers.

Using this instruction set, you can expect significant code size reductions that result in higher code density and better power dissipation.

• Xtensa GPR and ABI
• Xtensa Instruction Set
• Xtensa Exception
• Xtensa Memory

6 片内外设

• 12-bit SAR ADC，18 个通道
• 2 个 8-bit D/A 转换器
• 超低功耗前置模拟放大器

• 1 个 Host SD ／ eMMC ／ SDIO
• 1 个 Slave SDIO ／ SPI

• 带有专用 DMA 的以太网 MAC 接口，支持 IEEE 1588
• CAN 2.0

• 2 个 I2C
• 4 个 SPI
• 3 个 UART
• IR（TX ／ RX）

• 2 个 I2S
• 电机 PWM （3 路 16-bit 定时器产生 PWM 波形，每路 包含一对输出信号。3 个故障检测信号。3 个 even capture 信号。3 个同步信号）
• LED PWM，16 个通道（16 个独立的通道运行在 80MHz 的时钟或 RTC 时钟上。占空比精确度：16-bit）

• 10 个电容式触摸传感器
• 温度传感器
• 霍尔传感器

• ESP32 RTC ULP Co-processor

• ESP32 I2S

7 First Glance

ets Jun  8 2016 00:22:57

rst:0x10 (RTCWDT_RTC_RESET),boot:0x33 (SPI_FAST_FLASH_BOOT)
flash read err, 1000
Falling back to built-in command interpreter.
OK
>ets Jun  8 2016 00:22:57

rst:0x10 (RTCWDT_RTC_RESET),boot:0x33 (SPI_FAST_FLASH_BOOT)
flash read err, 1000
Falling back to built-in command interpreter.
OK
>stop
OK
>about
ESP32 ROM Basic (c) 2016 Espressif Shanghai
Derived from TinyBasic Plus by Mike Field and Scott Lawrence

>help
A very Basic ROM console. Available commands/functions:
LIST
NEW
RUN
NEXT
LET
IF
GOTO
......
......
>

IO12(MTDI) Pull-up:

ets Jun  8 2016 00:22:57

rst:0x10 (RTCWDT_RTC_RESET),boot:0x33 (SPI_FAST_FLASH_BOOT)
flash read err, 1000
Falling back to built-in command interpreter.

IO2 Pull-up:

ets Jun  8 2016 00:22:57

rst:0x10 (RTCWDT_RTC_RESET),boot:0x3b (SPI_FAST_FLASH_BOOT)
flash read err, 1000
Falling back to built-in command interpreter.

IO12(MTDI) Pull-down:

ets Jun  8 2016 00:22:57

rst:0x10 (RTCWDT_RTC_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
flash read err, 1000
Falling back to built-in command interpreter.

IO2 Pull-up, IO0 Pull-down:

ets Jun  8 2016 00:22:57

rst:0x10 (RTCWDT_RTC_RESET),boot:0x2b (HSPI_FLASH_BOOT)
flash read err, 1000
Falling back to built-in command interpreter.

---

IO0 Pull-down:

>ets Jun  8 2016 00:22:57

rst:0x10 (RTCWDT_RTC_RESET),boot:0x23 (DOWNLOAD_BOOT(UART0/UART1/SDIO_REI_REO_V2))
waiting for download

IO0 and IO12(MTDI) Pull-down:

ets Jun  8 2016 00:22:57

rst:0x1 (POWERON_RESET),boot:0x3 (DOWNLOAD_BOOT(UART0/UART1/SDIO_REI_REO_V2))
waiting for download