SWPA230A May   2017  – June 2018 CC3120 , CC3120MOD , CC3220MOD , CC3220MODA , CC3220R , CC3220S , CC3220SF

 

  1.   CC3120 and CC3220 SimpleLink™ Wi-Fi® Embedded Programming
    1.     Trademarks
    2. 1 Introduction
    3. 2 Embedded Programming Schemes
    4. 3 Setup
    5. 4 Bootloader Protocol
      1. 4.1 Overview
      2. 4.2 General Message Format
      3. 4.3 Commands
        1. 4.3.1 Get Status
        2. 4.3.2 Get Storage List
        3. 4.3.3 Raw Storage Write
        4. 4.3.4 Get Version Info
        5. 4.3.5 Raw Storage Erase
        6. 4.3.6 Get Storage Info
        7. 4.3.7 Execute from RAM
        8. 4.3.8 Switch UART to APPS MCU
        9. 4.3.9 FS Programming
      4. 4.4 Responses
        1. 4.4.1 Ack
        2. 4.4.2 Nack
        3. 4.4.3 Last Status
        4. 4.4.4 Storage List
        5. 4.4.5 Storage Info
        6. 4.4.6 Version Info
    6. 5 Embedded Programming Procedure
      1. 5.1 Overview
      2. 5.2 High-Level Flow Diagram
      3. 5.3 Image Programming in Detail
        1. 5.3.1  Step 1: Target Connection
        2. 5.3.2  Step 2: Target Detection
        3. 5.3.3  Step 3: MUX UART to the Network Processor
        4. 5.3.4  Step 4: Get SRAM Storage Info
        5. 5.3.5  Step 5: Raw Storage Erase – SRAM
        6. 5.3.6  Step 6: Raw Storage Write – SRAM
        7. 5.3.7  Step 7: Execute from RAM
        8. 5.3.8  Step 8: Get SFLASH Storage Info
        9. 5.3.9  Step 9: Raw Storage Erase – SFLASH
        10. 5.3.10 Step 10: Raw Storage Write – SFLASH
        11. 5.3.11 Step 11: FS Programming
        12. 5.3.12 Step 12: Device Reset
  2.   Revision History

1 Introduction

The SimpleLink™ CC3120 and CC3220 devices are Wi-Fi® and networking devices that provide a comprehensive networking solution for low-cost and low-power microcontrollers (MCU) using a thin driver and simple API set.

Each product with an embedded CC3120 or CC3220 device onboard must also have a serial flash device connected. The serial flash must be formatted, and at a minimum programmed with the Service Pack, which contains necessary software updates and additional features. For the CC3220, a binary image running on the internal MCU processor must also be programmed.

There are several options for serial flash programming, as follows:

  • UniFlash – a PC-based utility offering image creation and programming. Content is programmed using the UART.
  • Industrial flash programmer – flashes a complete image prepared with UniFlash directly to the serial flash. Can be applied when no SimpleLink device is attached to the serial flash. Content is programmed using the serial flash SPI lines.
  • Over-the-air programming – the serial flash must be formatted in advance. Content is delivered through a network connection.

This application note describes in details additional options that leverage all the features UniFlash has to offer, but without the necessary connected PC. This option is referred to as Embedded Programming. To achieve embedded programming, bootloader protocol implemented over UART is described in detail.

The following sections describe the setup, bootloader protocol, and procedure of the embedded programming feature.