Add INMP441 I2S Omnidirectional Microphone

.vscode/c_cpp_properties.json

@@ -0,0 +1,17 @@
+{
+    "configurations": [
+        {
+            "name": "Linux",
+            "includePath": [
+                "${workspaceFolder}/**"
+            ],
+            "defines": [],
+            "compilerPath": "/usr/bin/gcc",
+            "cStandard": "c11",
+            "cppStandard": "gnu++14",
+            "intelliSenseMode": "linux-gcc-x64",
+            "configurationProvider": "ms-vscode.cmake-tools"
+        }
+    ],
+    "version": 4
+}

.vscode/settings.json

@@ -0,0 +1,9 @@
+{
+    "files.associations": {
+        "pio.h": "c",
+        "dreq.h": "c",
+        "pio_instructions.h": "c",
+        "type_traits": "cpp",
+        "i2s_microphone.h": "c"
+    }
+}

CMakeLists.txt

@@ -2,7 +2,7 @@ cmake_minimum_required(VERSION 3.12)
 
 # initialize pico_sdk from GIT
 # (note this can come from environment, CMake cache etc)
-# set(PICO_SDK_FETCH_FROM_GIT on)
+set(ENV{PICO_SDK_PATH} "/home/ttb/raspberry-pi-pico/pico/pico-sdk")
 
 # pico_sdk_import.cmake is a single file copied from this SDK
 # note: this must happen before project()
@@ -14,33 +14,39 @@ project(pico_microphone)
 pico_sdk_init()
 
 add_library(pico_pdm_microphone INTERFACE)
-
 target_sources(pico_pdm_microphone INTERFACE
     ${CMAKE_CURRENT_LIST_DIR}/src/pdm_microphone.c
     ${CMAKE_CURRENT_LIST_DIR}/src/OpenPDM2PCM/OpenPDMFilter.c
 )
-
 target_include_directories(pico_pdm_microphone INTERFACE
     ${CMAKE_CURRENT_LIST_DIR}/src/include
 )
-
 pico_generate_pio_header(pico_pdm_microphone ${CMAKE_CURRENT_LIST_DIR}/src/pdm_microphone.pio)
-
 target_link_libraries(pico_pdm_microphone INTERFACE pico_stdlib hardware_dma hardware_pio)
 
 
-add_library(pico_analog_microphone INTERFACE)
+add_library(pico_i2s_microphone INTERFACE)
+target_sources(pico_i2s_microphone INTERFACE
+    ${CMAKE_CURRENT_LIST_DIR}/src/i2s_microphone.c
+)
+target_include_directories(pico_i2s_microphone INTERFACE
+    ${CMAKE_CURRENT_LIST_DIR}/src/include
+    examples/usb_microphone
+)
+target_link_libraries(pico_i2s_microphone INTERFACE pico_stdlib hardware_dma hardware_pio)
+
 
+add_library(pico_analog_microphone INTERFACE)
 target_sources(pico_analog_microphone INTERFACE
     ${CMAKE_CURRENT_LIST_DIR}/src/analog_microphone.c
 )
-
 target_include_directories(pico_analog_microphone INTERFACE
     ${CMAKE_CURRENT_LIST_DIR}/src/include
 )
-
 target_link_libraries(pico_analog_microphone INTERFACE pico_stdlib hardware_adc hardware_dma)
 
-add_subdirectory("examples/hello_analog_microphone")
 add_subdirectory("examples/hello_pdm_microphone")
+add_subdirectory("examples/hello_analog_microphone")
 add_subdirectory("examples/usb_microphone")
+add_subdirectory("examples/hello_i2s_microphone")
+add_subdirectory("examples/hello_analog_microphone")

README.md

@@ -2,76 +2,104 @@
 
 Capture audio from a microphone on your [Raspberry Pi Pico](https://www.raspberrypi.org/products/raspberry-pi-pico/) or any [RP2040](https://www.raspberrypi.org/products/rp2040/) based board. 🎤
 
-
 ## Hardware
 
- * RP2040 board
-   * [Raspberry Pi Pico](https://www.raspberrypi.org/products/raspberry-pi-pico/)
- * Microphones
-   * Analog
-     * [Electret Microphone Amplifier - MAX9814 with Auto Gain Control](https://www.adafruit.com/product/1713) 
-   * PDM
-     * [Adafruit PDM MEMS Microphone Breakout](https://www.adafruit.com/product/3492)
+* RP2040 board
+
+  * [Raspberry Pi Pico](https://www.raspberrypi.org/products/raspberry-pi-pico/)
+
+* Microphones
+
+  * I2S
+
+    * [INMP441 I2S Omnidirectional Microphone](https://hshop.vn/products/cam-bien-am-thanh-inmp441-i2s-omnidirectional-microphone)
+
+  * Analog
+
+    * [Electret Microphone Amplifier - MAX9814 with Auto Gain Control](https://www.adafruit.com/product/1713) 
+
+  * PDM
+
+    * [Adafruit PDM MEMS Microphone Breakout](https://www.adafruit.com/product/3492)
 
 ### Default Pinout
 
+#### I2S Microphone
+
+| Raspberry Pi Pico / RP2040 | Analog Microphone |
+| -------------------------- | ----------------- |
+| 3.3V                       | VCC               |
+| GND                        | GND               |
+| GPIO 2                     | SCK               |
+| GPIO 3                     | WS                |
+| GPIO 6                     | SD                |
+| GND                        | L/R               |
+
 #### Analog Microphone
 
 | Raspberry Pi Pico / RP2040 | Analog Microphone |
 | -------------------------- | ----------------- |
-| 3.3V | VCC |
-| GND | GND |
-| GPIO 26 | OUT |
+| 3.3V                       | VCC               |
+| GND                        | GND               |
+| GPIO 26                    | OUT               |
 
 #### PDM Microphone
 
 | Raspberry Pi Pico / RP2040 | PDM Microphone |
-| -------------------------- | ----------------- |
-| 3.3V | VCC |
-| GND | GND |
-| GND | SEL |
-| GPIO 2 | DAT |
-| GPIO 3 | CLK |
+| -------------------------- | -------------- |
+| 3.3V                       | VCC            |
+| GND                        | GND            |
+| GND                        | SEL            |
+| GPIO 2                     | DAT            |
+| GPIO 3                     | CLK            |
 
 GPIO pins are configurable in examples or API.
 
 ## Examples
 
-See [examples](examples/) folder.
+[Git Examples about microphone](https://github.com/dattran-itrvn/microphone-library-for-pico/tree/Binh_Dev)
 
+#### Set up Pico SDK
 
-## Cloning
+[Set up the Pico C/C++ SDK](https://datasheets.raspberrypi.org/pico/getting-started-with-pico.pdf)
 
-```sh
-git clone https://github.com/ArmDeveloperEcosystem/microphone-library-for-pico.git 
-```
+1. Set `PICO_SDK_PATH`
+
+   ```sh
+   export PICO_SDK_PATH=/path/to/pico-sdk
+   ```
 
-## Building
+2. Create `build` dir, run `cmake` and `make`:
+
+   ```
+   mkdir build
+   cd build
+   cmake .. -DPICO_BOARD=pico
+   make
+   ```
 
-1. [Set up the Pico C/C++ SDK](https://datasheets.raspberrypi.org/pico/getting-started-with-pico.pdf)
-2. Set `PICO_SDK_PATH`
-```sh
-export PICO_SDK_PATH=/path/to/pico-sdk
-```
-3. Create `build` dir, run `cmake` and `make`:
-```
-mkdir build
-cd build
-cmake .. -DPICO_BOARD=pico
-make
-```
-4. Copy example `.uf2` to Pico when in BOOT mode.
+3. Copy example `.uf2` to Pico when in BOOT mode.
 
 ## License
 
 [Apache-2.0 License](LICENSE)
 
 ## Acknowledgements
 
-This project was created on behalf of the [Arm Software Developers](https://developer.arm.com/) team, follow them on Twitter: [@ArmSoftwareDev](https://twitter.com/armsoftwaredev) and YouTube: [Arm Software Developers](https://www.youtube.com/channel/UCHUAckhCfRom2EHDGxwhfOg) for more resources!
+##### - Mic Analog or Mic PDM
 
 The [OpenPDM2PCM](https://os.mbed.com/teams/ST/code/X_NUCLEO_CCA02M1//file/53f8b511f2a1/Middlewares/OpenPDM2PCM/) library is used to filter raw PDM data into PCM. The [TinyUSB](https://github.com/hathach/tinyusb) library is used in the `usb_microphone` example.
 
 ---
 
-Disclaimer: This is not an official Arm product.
+##### - Mic I2S
+
+Get data raw using I2S protocol and using algorithm fill buffer to decode audio. 
+
+Buffer App = Buffer Ring / 4 = Buffer DMA / 8. 
+
+To record data, using [TinyUSB]([GitHub - hathach/tinyusb: An open source cross-platform USB stack for embedded system](https://github.com/hathach/tinyusb)) library is used in the `usb_microphone` example. Buffer output <= 32 bytes <=> 256 bytes in DMA buffer
+
+Using [Audacity software]([Download | Audacity ®](https://www.audacityteam.org/download/) get audio output 
+
+---

examples/hello_i2s_microphone/CMakeLists.txt

@@ -0,0 +1,19 @@
+cmake_minimum_required(VERSION 3.12)
+
+# rest of your project
+add_executable(hello_i2s_microphone
+    main.c
+    usb_descriptors.c
+    usb_microphone.c
+)
+
+target_include_directories(hello_i2s_microphone PRIVATE ${CMAKE_CURRENT_LIST_DIR})
+
+target_link_libraries(hello_i2s_microphone PRIVATE tinyusb_device tinyusb_board pico_i2s_microphone)
+
+# enable usb output, disable uart output
+# pico_enable_stdio_usb(hello_i2s_microphone 1)
+pico_enable_stdio_uart(hello_i2s_microphone 1)
+
+# create map/bin/hex/uf2 file in addition to ELF.
+pico_add_extra_outputs(hello_i2s_microphone)

examples/hello_i2s_microphone/main.c

@@ -0,0 +1,61 @@
+#include "stdio.h"
+#include "tusb.h"
+#include "pico/stdlib.h"
+#include "pico/i2s_microphone.h"
+#include "usb_microphone.h"
+
+
+#define SCK 2
+#define WS 3 // needs to be SCK +1
+#define SD 6
+#define BPS 16 
+#define RATE 16000
+#define BUTTON 15
+#define SIZE_APP_BUFFER (SIZEOF_DMA_BUFFER_IN_BYTES/8)
+
+uint32_t countByte = 0;
+uint32_t byteReads = 0;
+int16_t sample_buffer[SIZE_APP_BUFFER/2];
+machine_i2s_obj_t* i2s0;
+uint8_t id_i2s = 0;
+
+//// Callback function I2S /////
+void on_i2s_samples_ready(){
+    byteReads = machine_i2s_stream_read(i2s0, (void*)&sample_buffer, SIZE_APP_BUFFER); // app buffer len <= dma buffer len / 8
+}
+
+// Callback function USB //
+void on_usb_microphone_tx_ready(){
+  usb_microphone_write(sample_buffer, sizeof(sample_buffer));
+}
+
+void init(){
+    stdio_init_all();
+    gpio_init(BUTTON);
+    gpio_set_dir(BUTTON, GPIO_IN);
+    gpio_pull_up(BUTTON);
+}
+
+int main(){
+    init();
+    printf("START RECORD\r\n");
+    printf("\r\n");
+    printf("----- START DATA -----\r\n");
+    sleep_ms(500);
+
+    i2s0 = machine_i2s_make_new(id_i2s, SCK, WS, SD,
+                                RX, BPS, MONO,
+                                SIZEOF_DMA_BUFFER_IN_BYTES, // set ring buffer len >= dma buffer len 
+                                RATE);
+
+    i2s_microphone_set_samples_ready(on_i2s_samples_ready, id_i2s);
+
+    usb_microphone_init();
+    usb_microphone_set_tx_ready_handler(on_usb_microphone_tx_ready);
+
+    while (1){
+        usb_microphone_task();
+    }
+
+    return 0;
+}