Merge branch 'doc/fix_1' into 'feature/esp_as_mcu_host'

Update spi_full_duplex.md

See merge request app-frameworks/esp_hosted!502

docs/design_consideration.md

@@ -58,14 +58,27 @@ connected together. Verify that the correct GPIOs are set-up in
 > under Hosted. Check the ESP datasheet to verify the GPIOs you select
 > can be used as a Hosted interface.
 
-### 2.2. Using SPI insted of SDIO
+### 2.2. Evaluate with jumpers first
 
-In general, SPI imposes fewer hardware requirements compared to
+It is flexible to evaluate with jumper cables or bread board than full-fledged PCB.
+In general, SPI (Standard & Dual SPI) imposes fewer hardware requirements compared to
 SDIO. SPI is easier to prototype, and available on more ESP chips and
 MCUs compared to SDIO.
-
-However, if you need a high-speed interface, SDIO should be
-considered.
+Before going to SDIO 4 bit mode PCB, it's better to evaluate SDIO 1-Bit mode.
+
+Once you evaluate the solution on jumper cables, you can move to PCB solutions with same or high performance transport.
+
+###### Jumper cable considerations
+- Use high quality jumper cables
+- Use jumper cables as small as possible. you can cut and solder the joints if need be.
+- Use equal length jumper cables for all the connections
+- Grounds: Connect as many grounds as possible, this lowers the interference.
+- Jumper cable lengths
+  - Standard SPI: At max 10cm, lower the better
+  - Dual SPI: At max 10cm, lower the better
+  - SDIO 1 Bit: At max 5cm, lower the better
+  - Quad SPI : jumpers not supported, only PCB
+  - SDIO 4 Bit: Jumpers not supported, only PCB
 
 ### 2.3. Whenever possible, Use `IO_MUX` GPIOs.
 
@@ -102,7 +115,7 @@ For jumper cables, you can try surrounding the signals, especially the
 
 > [!NOTE]
 > For SDIO, external pull-up resistors (recommended value: 51 kOhms)
-> are required. Using jumper cable are not recommended for SDIO. You
+> are required. Using jumper cable are **not** recommended for SDIO. You
 > may be able to get SDIO working with jumper cables by using a lower
 > `CLK` frequency and using 1-bit SDIO mode.
 
@@ -130,7 +143,7 @@ be used to light a LED or trigger a capture on an oscilloscope or
 logic analyzer, for example. This is useful for capturing rare or
 intermittent conditions while testing Hosted.
 
-In the future, Hosted may also offer more features, like controlling
+In the future, Hosted may also offer newer transport options or more features, like controlling
 power modes on the Host and Slave. These may require additional GPIOs
 for control, so it would be good to keep some additional GPIOs
 available and accesable for future use.

docs/esp32_p4_function_ev_board.md

@@ -1,62 +1,127 @@
 # ESP-Hosted on the ESP32-P4-Function-EV-Board DevKit
 
-**Table of Contents**
-
-- [1. Introduction](#1-introduction)
-- [2. Building ESP-Hosted as Host for the P4](#2-building-esp-hosted-as-host-for-the-p4)
-  - [2.1. Adding Wifi Remote and Hosted Components](#21-adding-wifi-remote-and-hosted-components)
-  - [2.2. Building the Firmware](#22-building-the-firmware)
-- [3. Checking that ESP-Hosted is Running](#3-checking-that-esp-hosted-is-running)
-- [4. Flashing the On-board ESP32-C6 using ESP-Prog](#4-flashing-the-on-board-esp32-c6-using-esp-prog)
-- [5. Troubleshooting](#5-troubleshooting)
-- [6. Flashing the On-board ESP32-P4 through the Serial Interface](#6-flashing-the-on-board-esp32-p4-through-the-serial-interface)
-- [7. References](#7-references)
+<details>
+<summary>**Table of Contents**</summary>
+
+- [Introduction](#1-introduction)
+- [Set-Up ESP-IDF](#2-set-up-esp-idf)
+- [Building Host for the P4](#3-building-host-for-the-p4)
+  - [Adding Components](#31-adding-components)
+  - [Configuring Defaults](#32-configuring-defaults)
+  - [Building Firmware](#33-building-firmware)
+- [Checking ESP-Hosted](#4-checking-esp-hosted)
+- [Flashing ESP32-C6](#5-flashing-esp32-c6)
+  - [Using ESP-Prog](#51-using-esp-prog)
+  - [OTA Updates](#52-ota-updates)
+- [Troubleshooting](#6-troubleshooting)
+- [Flashing the On-board ESP32-P4 through the ESP-Prog](#7-flashing-esp32-p4)
+- [References](#8-references)
+
+</details>
 
 ## 1. Introduction
 
-This page documents using ESP-Hosted on the
-ESP32-P4-Function-EV-Board. The board comes with an on-board ESP32-C6
-module, pre-flashed with ESP-Hosted slave code (v0.0.6). The board
-provides a Wi-Fi connection to the on-board ESP32-P4, which acts as
-the host.
+This page documents using ESP-Hosted-MCU on the ESP32-P4-Function-EV-Board. The board comes with an on-board ESP32-C6 module, pre-flashed with ESP-Hosted-MCU slave code (v0.0.6). The board provides a Wi-Fi connection to the on-board ESP32-P4, which acts as the host.
 
 The image below shows the board.
 
-<img src="images/esp32-p4-function-ev-board.jpg"
-alt="ESP32-P4-Function-EV-Board" width="800" />
+<img src="images/esp32-p4-function-ev-board.jpg" alt="ESP32-P4-Function-EV-Board" width="800" />
 
 *ESP32-P4-Function-EV-Board*
 
 The ESP32-P4 communicates with the ESP32-C6 module using SDIO.
 
-## 2. Building ESP-Hosted as Host for the P4
+## 2. Set-Up ESP-IDF
+
+As you have reached here, it is highly likely that you have already setup ESP-IDF.
+
+If not done, Please set up ESP-IDF:
+
+#### Option 1: Installer Way
+
+- **Windows**
+  - Install and setup ESP-IDF on Windows as documented in the [Standard Setup of Toolchain for Windows](https://docs.espressif.com/projects/esp-idf/en/latest/esp32/get-started/windows-setup.html).
+  - Use the ESP-IDF [Powershell Command Prompt](https://docs.espressif.com/projects/esp-idf/en/latest/esp32/get-started/windows-setup.html#using-the-command-prompt) for subsequent commands.
+
+- **Linux or MacOS**
+  - For bash:
+    ```bash
+    bash docs/setup_esp_idf__latest_stable__linux_macos.sh
+    ```
+  - For fish:
+    ```fish
+    fish docs/setup_esp_idf__latest_stable__linux_macos.fish
+    ```
+
+#### Option 2: Manual Way
 
-### 2.1. Adding Wifi Remote and Hosted Components
+Please follow the [ESP-IDF Get Started Guide](https://docs.espressif.com/projects/esp-idf/en/latest/esp32/get-started/index.html) for manual installation.
 
-The Wi-Fi service is provided to the ESP32-P4 using the
-`esp_wifi_remote` component. Check your project's `idf_component.yml`
-file) to see if it is already present. If not, you can add this
-component to your project:
+## 3. Building Host for the P4
+
+### 3.1. Adding Components
+
+Add `esp_wifi_remote` and `esp_hosted` components to the project:
 
 ```
 idf.py add-dependency "espressif/esp_wifi_remote"
+idf.py add-dependency "espressif/esp_hosted"
+```
+
+Remove 'esp-extconn' if present in `main/idf_component.yml`, as esp-extconn and esp-hosted cannot work together.
+Open the `main/idf_component.yml` file and remove/comment the following block if present:
+
+```
+# ------- Delete or comment this block ---------
+espressif/esp-extconn:
+  version: "~0.1.0"
+  rules:
+    - if: "target in [esp32p4]"
+# -----------------------------------
 ```
 
-The `esp_wifi_remote` component has a dependency on ESP-Hosted and
-will also add the `esp_hosted` component to your build.
+It is always good to use `esp_wifi_remote` as it provides all the Wi-Fi config and a wrapper abstraction layer.
+But you can also evaluate without using it.
 
-### 2.2. Building the Firmware
+### 3.2. Configuring Defaults
+
+Edit the `sdkconfig.defaults.esp32p4` file such that, it would have following content:
+
+```
+#### Comment below two lines if present:
+# CONFIG_ESP_HOST_WIFI_ENABLED=y
+# CONFIG_PARTITION_TABLE_SINGLE_APP_LARGE=y
+
+#### Add Wi-Fi Remote config for better performance:
+CONFIG_ESP_WIFI_STATIC_RX_BUFFER_NUM=16
+CONFIG_ESP_WIFI_DYNAMIC_RX_BUFFER_NUM=64
+CONFIG_ESP_WIFI_DYNAMIC_TX_BUFFER_NUM=64
+CONFIG_ESP_WIFI_AMPDU_TX_ENABLED=y
+CONFIG_ESP_WIFI_TX_BA_WIN=32
+CONFIG_ESP_WIFI_AMPDU_RX_ENABLED=y
+CONFIG_ESP_WIFI_RX_BA_WIN=32
+
+CONFIG_LWIP_TCP_SND_BUF_DEFAULT=65534
+CONFIG_LWIP_TCP_WND_DEFAULT=65534
+CONFIG_LWIP_TCP_RECVMBOX_SIZE=64
+CONFIG_LWIP_UDP_RECVMBOX_SIZE=64
+CONFIG_LWIP_TCPIP_RECVMBOX_SIZE=64
+
+CONFIG_LWIP_TCP_SACK_OUT=y
+```
+
+### 3.3. Building Firmware
 
 Set the ESP32-P4 as the target, build, flash the firmware and
 (optionally) monitor ESP32-P4 console output:
 
 ```sh
 idf.py set-target esp32p4
 idf.py build
-idf.py -p <Serial Port> flash monitor`
+idf.py -p <Serial Port> flash monitor
 ```
 
-## 3. Checking that ESP-Hosted is Running
+## 4. Checking ESP-Hosted
 
 When the P4 is running with Hosted, you should see console output similar to this after start-up:
 
@@ -114,17 +179,68 @@ I (1848) H_SDIO_DRV: Received INIT event
 I (1868) rpc_wrap: Received Slave ESP Init
 ```
 
-## 4. Flashing the On-board ESP32-C6 using ESP-Prog
+## 5. Flashing ESP32-C6
+ESP32-C6 flashing is totally **optional**, as C6 is expected to be pre-flashed with ESP-Hosted slave firmware, 0.0.6. If you wish to get updated ESP-Hosted slave firmware, you can flash it using two ways, Either with ESP-Prog on ESP32-C6, or using OTA update configured using web server.
+
+### 5.1 OTA Updates
+
+To update the ESP32-C6 slave module using Over-The-Air (OTA) updates, follow these steps:
+
+1. Build the ESP-Hosted slave firmware for the ESP32-C6 module:
+
+```
+idf.py create-project-from-example "espressif/esp_hosted:slave"
+```
+
+2. Set the target and start `Menuconfig`:
+
+```sh
+idf.py set-target esp32c6
+idf.py menuconfig
+```
+
+3. Under **Example Configuration**, ensure that the Hosted transport
+   selected is `SDIO`.
+
+4. Build the firmware:
+
+```sh
+idf.py build
+```
+
+5. Upload the firmware (the build/network_adapter.bin file) to a server or a local directory accessible via HTTP.
+
+6. On the ESP32-P4 host, add the following code to your application to initiate the OTA update:
+
+```
+#include "esp_hosted.h"
+
+esp_err_t esp_hosted_ota_start(const char *url);
+```
+
+7. Call the `esp_hosted_ota_start` function with the URL of the firmware binary:
+
+```
+esp_err_t err = esp_hosted_ota_start("http://example.com/path/to/network_adapter.bin");
+if (err != ESP_OK) {
+    ESP_LOGE(TAG, "Failed to start OTA update: %s", esp_err_to_name(err));
+}
+```
+
+8. Monitor the console output to see the OTA update progress.
+
+### 5.2 Using ESP-Prog
 
 > [!NOTE]
 > ESP-Prog is only required if you want to flash firmware to the
 > ESP32-C6 module using the standard ESP Tools.
 
+This step is optional, as C6 is expected to be pre-flashed with ESP-Hosted slave firmware, 0.0.6.
+
 The image below shows the board with an ESP-Prog connected to the
 header to communicate with the on-board ESP32-C6..
 
-<img src="images/esp32-p4-function-ev-board-esp-prog.jpg"
-alt="ESP32-P4-Function-EV-Board with ESP-Prog Connected to ESP32-C6" width="800" />
+<img src="images/esp32-p4-function-ev-board-esp-prog.jpg" alt="ESP32-P4-Function-EV-Board with ESP-Prog Connected to ESP32-C6" width="800" />
 
 *ESP32-P4-Function-EV-Board with ESP-Prog Connected to ESP32-C6*
 
@@ -133,7 +249,6 @@ ESP32-C6 module using ESP-Prog, follow these steps:
 
 1. Check out the ESP-Hosted slave example project:
 
-
 ```
 idf.py create-project-from-example "espressif/esp_hosted:slave"
 ```
@@ -174,28 +289,36 @@ prevent the P4 interfering with the C6 while flashing (by asserting
 the C6 Reset signal during the firmware download), set the P4 into
 Bootloader mode before flashing the firmware to the C6:
 
+###### Manual Way
     1. hold down the `BOOT` button on the board
     2. press and release the `RST` button on the board
     3. release the `BOOT` button
 
+###### Script Way
+
+```sh
+esptool.py -p <host_serial_port> --before default_reset --after no_reset run
+```
+
 You can now flash the firmware to the C6 (and monitor the console
 output):
 
 ```sh
 idf.py -p <Serial Port> flash monitor
 ```
 
-## 5. Troubleshooting
+
+
+## 6. Troubleshooting
 
 If you encounter issues with using ESP-Hosted, see the following guide:
 
 - [Troubleshooting Guide](troubleshooting.md)
 
 <details>
-
 <summary>Flashing the On-board ESP32-P4 through the Serial Interface</summary>
 
-## 6. Flashing the On-board ESP32-P4 through the Serial Interface
+## 7. Flashing the On-board ESP32-P4 through the ESP-Prog
 
 The USB connector on the board is the standard method for flashing the
 firmware to the P4. An alternative method is to flash the P4 through
@@ -204,8 +327,7 @@ its serial interface using a ESP-Prog.
 The image below shows the connection between the ESP-Prog and the
 serial port pins on the P4 header for programming.
 
-<img src="images/esp32-p4-esp-prog.jpg"
-alt="ESP32-P4 Serial Connection with ESP-Prog" width="600" />
+<img src="images/esp32-p4-esp-prog.jpg" alt="ESP32-P4 Serial Connection with ESP-Prog" width="600" />
 
 *ESP32-P4 Serial Connection with ESP-Prog*
 
@@ -236,7 +358,7 @@ on the board.
 
 </details>
 
-## 7. References
+## 8. References
 
 - ESP32-P4-Function-EV-Board: https://docs.espressif.com/projects/esp-dev-kits/en/latest/esp32p4/esp32-p4-function-ev-board/
 - ESP-Prog: https://docs.espressif.com/projects/esp-iot-solution/en/latest/hw-reference/ESP-Prog_guide.html