base on # Raspberry Pi RP2350 Pico SDK Examples - Early Access ## RP2350 Instructions Everything below this section is from the stock pico-examples, so ignore URLs etc., but generally instructions are the same. The Pico SDK default continues to be to build for RP2040 (PICO_PLATFORM=rp2040), so to build for RP2350, you need to pass `-DPICO_PLATFORM=rp2350` to CMake (or `-DPICO_PLATFORM=rp2350-riscv` for RISC-V). Most, but not all examples, currently work on RP2350 however you should be able to do a full build with any of the above platforms (PICO_PLATFORM=host however currently fails on some examples) For RISC-V compilation, you should take a compiler from here: https://www.embecosm.com/resources/tool-chain-downloads/#riscv-stable # Original pico-examples docs ## Getting started See [Getting Started with the Raspberry Pi Pico](https://rptl.io/pico-get-started) and the README in the [pico-sdk](https://github.com/raspberrypi/pico-sdk) for information on getting up and running. ### First Examples App| Description | Link to prebuilt UF2 ---|----------------------------------------------------------------------------|--- [hello_serial](hello_world/serial) | The obligatory Hello World program for Pico (Output over serial version) | [hello_usb](hello_world/usb) | The obligatory Hello World program for Pico (Output over USB version) | https://rptl.io/pico-hello-usb [blink](blink) | Blink a LED on and off. Works on both boards with regular LEDs and boards like Pico W where the led is connected via the Wi-Fi chip | https://rptl.io/pico-blink [blink_simple](blink_simple) | Blink a LED on and off. Does not work on boards like Pico W where the led is connected via the Wi-Fi chip. | https://rptl.io/pico-blink [picow_blink](pico_w/wifi/blink) | Blinks the on-board LED on boards like Pico W where the led is connected via the Wi-Fi chip. | http://rptl.io/pico-w-blink ### ADC App|Description ---|--- [hello_adc](adc/hello_adc) | Display the voltage from an ADC input. [joystick_display](adc/joystick_display) | Display a Joystick X/Y input based on two ADC inputs. [adc_console](adc/adc_console) | An interactive shell for playing with the ADC. Includes example of free-running capture mode. [onboard_temperature](adc/onboard_temperature) | Display the value of the onboard temperature sensor. [microphone_adc](adc/microphone_adc) | Read analog values from a microphone and plot the measured sound amplitude. [dma_capture](adc/dma_capture) | Use the DMA to capture many samples from the ADC. [read_vsys](adc/read_vsys) | Demonstrates how to read VSYS to get the voltage of the power supply. ### Binary Info App|Description ---|--- [blink_any](binary_info/blink_any) | Uses `bi_ptr` variables to create a configurable blink binary - see the separate [README](binary_info/README.md) for more details [hello_anything](binary_info/hello_anything) | Uses `bi_ptr` variables to create a configurable hello_world binary - see the separate [README](binary_info/README.md) for more details ### Bootloaders (RP2350 Only) App|Description ---|--- [enc_bootloader](bootloaders/encrypted) | A bootloader which decrypts binaries from flash into SRAM. See the separate [README](bootloaders/encrypted/README.md) for more information ### Clocks App|Description ---|--- [hello_48MHz](clocks/hello_48MHz) | Change the system clock frequency to 48 MHz while running. [hello_gpout](clocks/hello_gpout) | Use the general purpose clock outputs (GPOUT) to drive divisions of internal clocks onto GPIO outputs. [hello_resus](clocks/hello_resus) | Enable the clock resuscitate feature, "accidentally" stop the system clock, and show how we recover. [detached_clk_peri](clocks/detached_clk_peri) | Detach peripheral clock and vary system clock. ### CMake App|Description ---|--- [build_variants](cmake/build_variants) | Builds two version of the same app with different configurations ### DCP App|Description ---|--- [hello_dcp](dcp/hello_dcp) | Use the double-precision coprocessor directly in assembler. ### DMA App|Description ---|--- [hello_dma](dma/hello_dma) | Use the DMA to copy data in memory. [control_blocks](dma/control_blocks) | Build a control block list, to program a longer sequence of DMA transfers to the UART. [channel_irq](dma/channel_irq) | Use an IRQ handler to reconfigure a DMA channel, in order to continuously drive data through a PIO state machine. [sniff_crc](dma/sniff_crc) | Use the DMA engine's 'sniff' capability to calculate a CRC32 on a data buffer. ### HSTX App|Description ---|--- [dvi_out_hstx_encoder](dvi_out_hstx_encoder) `RP2350`| Use the HSTX to output a DVI signal with 3:3:2 RGB ### Flash App|Description ---|--- [cache_perfctr](flash/cache_perfctr) | Read and clear the cache performance counters. Show how they are affected by different types of flash reads. [nuke](flash/nuke) | Obliterate the contents of flash. An example of a NO_FLASH binary (UF2 loaded directly into SRAM and runs in-place there). A useful utility to drag and drop onto your Pico if the need arises. [program](flash/program) | Erase a flash sector, program one flash page, and read back the data. [xip_stream](flash/xip_stream) | Stream data using the XIP stream hardware, which allows data to be DMA'd in the background whilst executing code from flash. [ssi_dma](flash/ssi_dma) | DMA directly from the flash interface (continuous SCK clocking) for maximum bulk read performance. [runtime_flash_permissions](flash/runtime_flash_permissions) | Demonstrates adding partitions at runtime to change the flash permissions ### FreeRTOS These examples require you to set the `FREERTOS_KERNEL_PATH` to point to the FreeRTOS Kernel. See https://github.com/FreeRTOS/FreeRTOS-Kernel App|Description ---|--- [hello_freertos](freertos/hello_freertos) | Examples that demonstrate how run FreeRTOS and tasks on 1 or 2 cores. ### GPIO App|Description ---|--- [hello_7segment](gpio/hello_7segment) | Use the GPIOs to drive a seven segment LED display. [hello_gpio_irq](gpio/hello_gpio_irq) | Register an interrupt handler to run when a GPIO is toggled. [dht_sensor](gpio/dht_sensor) | Use GPIO to bitbang the serial protocol for a DHT temperature/humidity sensor. See also: [blink](blink), blinking an LED attached to a GPIO. ### HW divider App|Description ---|--- [hello_divider](divider) | Show how to directly access the hardware integer dividers, in case AEABI injection is disabled. ### I2C App|Description ---|--- [bus_scan](i2c/bus_scan) | Scan the I2C bus for devices and display results. [bmp280_i2c](i2c/bmp280_i2c) | Read and convert temperature and pressure data from a BMP280 sensor, attached to an I2C bus. [lcd_1602_i2c](i2c/lcd_1602_i2c) | Display some text on a generic 16x2 character LCD display, via I2C. [lis3dh_i2c](i2c/lis3dh_i2c) | Read acceleration and temperature value from a LIS3DH sensor via I2C [mcp9808_i2c](i2c/mcp9808_i2c) | Read temperature, set limits and raise alerts when limits are surpassed. [mma8451_i2c](i2c/mma8451_i2c) | Read acceleration from a MMA8451 accelerometer and set range and precision for the data. [mpl3115a2_i2c](i2c/mpl3115a2_i2c) | Interface with an MPL3115A2 altimeter, exploring interrupts and advanced board features, via I2C. [mpu6050_i2c](i2c/mpu6050_i2c) | Read acceleration and angular rate values from a MPU6050 accelerometer/gyro, attached to an I2C bus. [ssd1306_i2c](i2c/ssd1306_i2c) | Convert and display a bitmap on a 128x32 or 128x64 SSD1306-driven OLED display [pa1010d_i2c](i2c/pa1010d_i2c) | Read GPS location data, parse and display data via I2C. [pcf8523_i2c](i2c/pcf8523_i2c) | Read time and date values from a real time clock. Set current time and alarms on it. [ht16k33_i2c](i2c/ht16k33_i2c) | Drive a 4 digit 14 segment LED with an HT16K33. [slave_mem_i2c](i2c/slave_mem_i2c) | i2c slave example where the slave implements a 256 byte memory [slave_mem_i2c_burst](i2c/slave_mem_i2c) | i2c slave example where the slave implements a 256 byte memory. This version inefficiently writes each byte in a separate call to demonstrate read and write burst mode. ### Interpolator App|Description ---|--- [hello_interp](interp/hello_interp) | A bundle of small examples, showing how to access the core-local interpolator hardware, and use most of its features. ### Multicore App|Description ---|--- [hello_multicore](multicore/hello_multicore) | Launch a function on the second core, printf some messages on each core, and pass data back and forth through the mailbox FIFOs. [multicore_fifo_irqs](multicore/multicore_fifo_irqs) | On each core, register and interrupt handler for the mailbox FIFOs. Show how the interrupt fires when that core receives a message. [multicore_runner](multicore/multicore_runner) | Set up the second core to accept, and run, any function pointer pushed into its mailbox FIFO. Push in a few pieces of code and get answers back. [multicore_doorbell](multicore/multicore_doorbell) | Claims two doorbells for signaling between the cores. Counts how many doorbell IRQs occur on the second core and uses doorbells to coordinate exit. ### OTP App|Description ---|--- [hello_otp](otp/hello_otp) | Demonstrate reading and writing from the OTP on RP2350, along with some of the features of OTP (error correction and page locking). ### Pico Board App|Description ---|--- [blinky](picoboard/blinky) | Blink "hello, world" in Morse code on Pico's LED [button](picoboard/button) | Use Pico's BOOTSEL button as a regular button input, by temporarily suspending flash access. ### Pico Networking These networking examples are only available if Wi-Fi is supported by the board. App|Description ---|--- [picow_access_point](pico_w/wifi/access_point) | Starts a WiFi access point, and fields DHCP requests. [picow_blink](pico_w/wifi/blink) | Blinks the on-board LED (which is connected via the WiFi chip). [picow_blink_slow_clock](pico_w/wifi/blink) | Blinks the on-board LED (which is connected via the WiFi chip) with a slower system clock to show how to reconfigure communication with the WiFi chip at run time under those circumstances [picow_blink_fast_clock](pico_w/wifi/blink) | Blinks the on-board LED (which is connected via the WiFi chip) with a faster system clock to show how to reconfigure communication with the WiFi chip at build time under those circumstances [picow_iperf_server](pico_w/wifi/iperf) | Runs an "iperf" server for WiFi speed testing. [picow_ntp_client](pico_w/wifi/ntp_client) | Connects to an NTP server to fetch and display the current time. [picow_tcp_client](pico_w/wifi/tcp_client) | A simple TCP client. You can run [python_test_tcp_server.py](pico_w/wifi/python_test_tcp/python_test_tcp_server.py) for it to connect to. [picow_tcp_server](pico_w/wifi/tcp_server) | A simple TCP server. You can use [python_test_tcp_client.py](pico_w//wifi/python_test_tcp/python_test_tcp_client.py) to connect to it. [picow_tls_client](pico_w/wifi/tls_client) | Demonstrates how to make a HTTPS request using TLS. [picow_tls_verify](pico_w/wifi/tls_client) | Demonstrates how to make a HTTPS request using TLS with certificate verification. [picow_wifi_scan](pico_w/wifi/wifi_scan) | Scans for WiFi networks and prints the results. [picow_udp_beacon](pico_w/wifi/udp_beacon) | A simple UDP transmitter. [picow_httpd](pico_w/wifi/httpd) | Runs a LWIP HTTP server test app [picow_http_client](pico_w/wifi/http_client) | Demonstrates how to make http and https requests [picow_http_client_verify](pico_w/wifi/http_client) | Demonstrates how to make a https request with server authentication #### FreeRTOS examples These are examples of integrating Wi-Fi networking under FreeRTOS, and require you to set the `FREERTOS_KERNEL_PATH` to point to the FreeRTOS Kernel. See https://github.com/FreeRTOS/FreeRTOS-Kernel App|Description ---|--- [picow_freertos_iperf_server_nosys](pico_w/wifi/freertos/iperf) | Runs an "iperf" server for WiFi speed testing under FreeRTOS in NO_SYS=1 mode. The LED is blinked in another task [picow_freertos_iperf_server_sys](pico_w/wifi/freertos/iperf) | Runs an "iperf" server for WiFi speed testing under FreeRTOS in NO_SYS=0 (i.e. full FreeRTOS integration) mode. The LED is blinked in another task [picow_freertos_ping_nosys](pico_w/wifi/freertos/ping) | Runs the lwip-contrib/apps/ping test app under FreeRTOS in NO_SYS=1 mode. [picow_freertos_ping_sys](pico_w/wifi/freertos/ping) | Runs the lwip-contrib/apps/ping test app under FreeRTOS in NO_SYS=0 (i.e. full FreeRTOS integration) mode. The test app uses the lwIP _socket_ API in this case. [picow_freertos_ntp_client_socket](pico_w/wifi/freertos/ntp_client_socket) | Connects to an NTP server using the LwIP Socket API with FreeRTOS in NO_SYS=0 (i.e. full FreeRTOS integration) mode. [pico_freertos_httpd_nosys](pico_w/wifi/freertos/httpd) | Runs a LWIP HTTP server test app under FreeRTOS in NO_SYS=1 mode. [pico_freertos_httpd_sys](pico_w/wifi/freertos/httpd) | Runs a LWIP HTTP server test app under FreeRTOS in NO_SYS=0 (i.e. full FreeRTOS integration) mode. [picow_freertos_http_client_sys](pico_w/wifi/freertos/http_client) | Demonstrates how to make a https request in NO_SYS=0 (i.e. full FreeRTOS integration) ### Pico Bluetooth These Bluetooth examples are only available for boards that support Bluetooth. They are examples from the Blue Kitchen Bluetooth stack, see [here](https://bluekitchen-gmbh.com/btstack/#examples/examples/index.html) for a full description. By default, the Bluetooth examples are only built in one "mode" only (*background*, *poll*, or *freertos*), with the default being *background*. This can be changed by passing `-DBTSTACK_EXAMPLE_TYPE=poll` etc. to `CMake`, or all examples can be built (which may be slow) by passing `-DBTSTACK_EXAMPLE_TYPE=all` Freertos versions can only be built if `FREERTOS_KERNEL_PATH` is defined. The Bluetooth examples that use audio require code in [pico-extras](https://github.com/raspberrypi/pico-extras). Pass `-DPICO_EXTRAS_PATH=${HOME}/pico-extras` on the cmake command line or define `PICO_EXTRAS_PATH=${HOME}/pico-extras` in your environment and re-run cmake to include them in the build. App|Description ---|--- [picow_bt_example_a2dp_sink_demo](https://github.com/bluekitchen/btstack/tree/master/example/a2dp_sink_demo.c) | A2DP Sink - Receive Audio Stream and Control Playback. [picow_bt_example_a2dp_source_demo](https://github.com/bluekitchen/btstack/tree/master/example/a2dp_source_demo.c) | A2DP Source - Stream Audio and Control Volume. [picow_bt_example_ancs_client_demo](https://github.com/bluekitchen/btstack/tree/master/example/ancs_client_demo.c) | LE ANCS Client - Apple Notification Service. [picow_bt_example_att_delayed_response](https://github.com/bluekitchen/btstack/tree/master/example/att_delayed_response.c) | LE Peripheral - Delayed Response. [picow_bt_example_audio_duplex](https://github.com/bluekitchen/btstack/tree/master/example/audio_duplex.c) | Audio Driver - Forward Audio from Source to Sink. [picow_bt_example_avrcp_browsing_client](https://github.com/bluekitchen/btstack/tree/master/example/avrcp_browsing_client.c) | AVRCP Browsing - Browse Media Players and Media Information. [picow_bt_example_dut_mode_classic](https://github.com/bluekitchen/btstack/tree/master/example/dut_mode_classic.c) | Testing - Enable Device Under Test (DUT.c) Mode for Classic. [picow_bt_example_gap_dedicated_bonding](https://github.com/bluekitchen/btstack/tree/master/example/gap_dedicated_bonding.c) | GAP bonding [picow_bt_example_gap_inquiry](https://github.com/bluekitchen/btstack/tree/master/example/gap_inquiry.c) | GAP Classic Inquiry. [picow_bt_example_gap_le_advertisements](https://github.com/bluekitchen/btstack/tree/master/example/gap_le_advertisements.c) | GAP LE Advertisements Scanner. [picow_bt_example_gap_link_keys](https://github.com/bluekitchen/btstack/tree/master/example/gap_link_keys.c) | GAP Link Key Management (Classic.c). [picow_bt_example_gatt_battery_query](https://github.com/bluekitchen/btstack/tree/master/example/gatt_battery_query.c) | GATT Battery Service Client. [picow_bt_example_gatt_browser](https://github.com/bluekitchen/btstack/tree/master/example/gatt_browser.c) | GATT Client - Discover Primary Services. [picow_bt_example_gatt_counter](https://github.com/bluekitchen/btstack/tree/master/example/gatt_counter.c) | GATT Server - Heartbeat Counter over GATT. [picow_bt_example_gatt_device_information_query](https://github.com/bluekitchen/btstack/tree/master/example/gatt_device_information_query.c) | GATT Device Information Service Client. [picow_bt_example_gatt_heart_rate_client](https://github.com/bluekitchen/btstack/tree/master/example/gatt_heart_rate_client.c) | GATT Heart Rate Sensor Client. [picow_bt_example_gatt_streamer_server](https://github.com/bluekitchen/btstack/tree/master/example/gatt_streamer_server.c) | Performance - Stream Data over GATT (Server.c). [picow_bt_example_hfp_ag_demo](https://github.com/bluekitchen/btstack/tree/master/example/hfp_ag_demo.c) | HFP AG - Audio Gateway. [picow_bt_example_hfp_hf_demo](https://github.com/bluekitchen/btstack/tree/master/example/hfp_hf_demo.c) | HFP HF - Hands-Free. [picow_bt_example_hid_host_demo](https://github.com/bluekitchen/btstack/tree/master/example/hid_host_demo.c) | HID Host Classic. [picow_bt_example_hid_keyboard_demo](https://github.com/bluekitchen/btstack/tree/master/example/hid_keyboard_demo.c) | HID Keyboard Classic. [picow_bt_example_hid_mouse_demo](https://github.com/bluekitchen/btstack/tree/master/example/hid_mouse_demo.c) | HID Mouse Classic. [picow_bt_example_hog_boot_host_demo](https://github.com/bluekitchen/btstack/tree/master/example/hog_boot_host_demo.c) | HID Boot Host LE. [picow_bt_example_hog_host_demo](https://github.com/bluekitchen/btstack/tree/master/example/hog_host_demo.c) | HID Host LE. [picow_bt_example_hog_keyboard_demo](https://github.com/bluekitchen/btstack/tree/master/example/hog_keyboard_demo.c) | HID Keyboard LE. [picow_bt_example_hog_mouse_demo](https://github.com/bluekitchen/btstack/tree/master/example/hog_mouse_demo.c) | HID Mouse LE. [picow_bt_example_hsp_ag_demo](https://github.com/bluekitchen/btstack/tree/master/example/hsp_ag_demo.c) | HSP AG - Audio Gateway. [picow_bt_example_hsp_hs_demo](https://github.com/bluekitchen/btstack/tree/master/example/hsp_hs_demo.c) | HSP HS - Headset. [picow_bt_example_le_credit_based_flow_control_mode_client](https://github.com/bluekitchen/btstack/tree/master/example/le_credit_based_flow_control_mode_client.c) | LE Credit-Based Flow-Control Mode Client - Send Data over L2CAP. [picow_bt_example_le_credit_based_flow_control_mode_server](https://github.com/bluekitchen/btstack/tree/master/example/le_credit_based_flow_control_mode_server.c) | LE Credit-Based Flow-Control Mode Server - Receive data over L2CAP. [picow_bt_example_led_counter](https://github.com/bluekitchen/btstack/tree/master/example/led_counter.c) | Hello World - Blinking a LED without Bluetooth. [picow_bt_example_le_mitm](https://github.com/bluekitchen/btstack/tree/master/example/le_mitm.c) | LE Man-in-the-Middle Tool. [picow_bt_example_le_streamer_client](https://github.com/bluekitchen/btstack/tree/master/example/le_streamer_client.c) | Performance - Stream Data over GATT (Client.c). [picow_bt_example_mod_player](https://github.com/bluekitchen/btstack/tree/master/example/mod_player.c) | Audio Driver - Play 80's MOD Song. [picow_bt_example_nordic_spp_le_counter](https://github.com/bluekitchen/btstack/tree/master/example/nordic_spp_le_counter.c) | LE Nordic SPP-like Heartbeat Server. [picow_bt_example_nordic_spp_le_streamer](https://github.com/bluekitchen/btstack/tree/master/example/nordic_spp_le_streamer.c) | LE Nordic SPP-like Streamer Server. [picow_bt_example_sdp_general_query](https://github.com/bluekitchen/btstack/tree/master/example/sdp_general_query.c) | SDP Client - Query Remote SDP Records. [picow_bt_example_sdp_rfcomm_query](https://github.com/bluekitchen/btstack/tree/master/example/sdp_rfcomm_query.c) | SDP Client - Query RFCOMM SDP record. [picow_bt_example_sine_player](https://github.com/bluekitchen/btstack/tree/master/example/sine_player.c) | Audio Driver - Play Sine. [picow_bt_example_sm_pairing_central](https://github.com/bluekitchen/btstack/tree/master/example/sm_pairing_central.c) | LE Central - Test Pairing Methods. [picow_bt_example_sm_pairing_peripheral](https://github.com/bluekitchen/btstack/tree/master/example/sm_pairing_peripheral.c) | LE Peripheral - Test Pairing Methods. [picow_bt_example_spp_and_gatt_counter](https://github.com/bluekitchen/btstack/tree/master/example/spp_and_gatt_counter.c) | Dual Mode - SPP and LE Counter. [picow_bt_example_spp_and_gatt_streamer](https://github.com/bluekitchen/btstack/tree/master/example/spp_and_gatt_streamer.c) | Dual Mode - SPP and LE streamer. [picow_bt_example_spp_counter](https://github.com/bluekitchen/btstack/tree/master/example/spp_counter.c) | SPP Server - Heartbeat Counter over RFCOMM. [picow_bt_example_spp_flowcontrol](https://github.com/bluekitchen/btstack/tree/master/example/spp_flowcontrol.c) | SPP Server - RFCOMM Flow Control. [picow_bt_example_spp_streamer_client](https://github.com/bluekitchen/btstack/tree/master/example/spp_streamer_client.c) | Performance - Stream Data over SPP (Client.c). [picow_bt_example_spp_streamer](https://github.com/bluekitchen/btstack/tree/master/example/spp_streamer.c) | Performance - Stream Data over SPP (Server.c). [picow_bt_example_ublox_spp_le_counter](https://github.com/bluekitchen/btstack/blob/master/example/ublox_spp_le_counter.c) | LE u-blox SPP-like Heartbeat Server. Some Standalone Bluetooth examples (without all the common example build infrastructure) are also available: App|Description ---|--- [picow_ble_temp_sensor](pico_w/bt/standalone) | Reads from the on board temperature sensor and sends notifications via BLE [picow_ble_temp_sensor_with_wifi](pico_w/bt/standalone) | Same as above but also connects to Wi-Fi and starts an "iperf" server [picow_ble_temp_reader](pico_w/bt/standalone) | Connects to one of the above "sensors" and reads the temperature ### PIO App|Description ---|--- [hello_pio](pio/hello_pio) | Absolutely minimal example showing how to control an LED by pushing values into a PIO FIFO. [apa102](pio/apa102) | Rainbow pattern on on a string of APA102 addressable RGB LEDs. [clocked_input](pio/clocked_input) | Shift in serial data, sampling with an external clock. [differential_manchester](pio/differential_manchester) | Send and receive differential Manchester-encoded serial (BMC). [hub75](pio/hub75) | Display an image on a 128x64 HUB75 RGB LED matrix. [i2c](pio/i2c) | Scan an I2C bus. [ir_nec](pio/ir_nec) | Sending and receiving IR (infra-red) codes using the PIO. [logic_analyser](pio/logic_analyser) | Use PIO and DMA to capture a logic trace of some GPIOs, whilst a PWM unit is driving them. [manchester_encoding](pio/manchester_encoding) | Send and receive Manchester-encoded serial. [onewire](pio/onewire)| A library for interfacing to 1-Wire devices, with an example for the DS18B20 temperature sensor. [pio_blink](pio/pio_blink) | Set up some PIO state machines to blink LEDs at different frequencies, according to delay counts pushed into their FIFOs. [pwm](pio/pwm) | Pulse width modulation on PIO. Use it to gradually fade the brightness of an LED. [spi](pio/spi) | Use PIO to erase, program and read an external SPI flash chip. A second example runs a loopback test with all four CPHA/CPOL combinations. [squarewave](pio/squarewave) | Drive a fast square wave onto a GPIO. This example accesses low-level PIO registers directly, instead of using the SDK functions. [squarewave_div_sync](pio/squarewave) | Generates a square wave on three GPIOs and synchronises the divider on all the state machines [st7789_lcd](pio/st7789_lcd) | Set up PIO for 62.5 Mbps serial output, and use this to display a spinning image on a ST7789 serial LCD. [quadrature_encoder](pio/quadrature_encoder) | A quadrature encoder using PIO to maintain counts independent of the CPU. [quadrature_encoder_substep](pio/quadrature_encoder_substep) | High resolution speed measurement using a standard quadrature encoder [uart_rx](pio/uart_rx) | Implement the receive component of a UART serial port. Attach it to the spare Arm UART to see it receive characters. [uart_tx](pio/uart_tx) | Implement the transmit component of a UART serial port, and print hello world. [ws2812](pio/ws2812) | Examples of driving WS2812 addressable RGB LEDs. [addition](pio/addition) | Add two integers together using PIO. Only around 8 billion times slower than Cortex-M0+. ### PWM App|Description ---|--- [hello_pwm](pwm/hello_pwm) | Minimal example of driving PWM output on GPIOs. [led_fade](pwm/led_fade) | Fade an LED between low and high brightness. An interrupt handler updates the PWM slice's output level each time the counter wraps. [measure_duty_cycle](pwm/measure_duty_cycle) | Drives a PWM output at a range of duty cycles, and uses another PWM slice in input mode to measure the duty cycle. ### Reset App|Description ---|--- [hello_reset](reset/hello_reset) | Perform a hard reset on some peripherals, then bring them back up. ### RTC App|Description ---|--- [hello_rtc](rtc/hello_rtc) | Set a date/time on the RTC, then repeatedly print the current time, 10 times per second, to show it updating. [rtc_alarm](rtc/rtc_alarm) | Set an alarm on the RTC to trigger an interrupt at a date/time 5 seconds into the future. [rtc_alarm_repeat](rtc/rtc_alarm_repeat) | Trigger an RTC interrupt once per minute. ### SHA-256 App|Description ---|--- [hello_sha256](sha/sha256) | Demonstrates how to use the pico_sha256 library to calculate a checksum using the hardware in rp2350 [mbedtls_sha256](sha/mbedtls_sha256) | Demonstrates using the SHA-256 hardware acceleration in mbedtls ### SPI App|Description ---|--- [bme280_spi](spi/bme280_spi) | Attach a BME280 temperature/humidity/pressure sensor via SPI. [mpu9250_spi](spi/mpu9250_spi) | Attach a MPU9250 accelerometer/gyoscope via SPI. [spi_dma](spi/spi_dma) | Use DMA to transfer data both to and from the SPI simultaneously. The SPI is configured for loopback. [spi_flash](spi/spi_flash) | Erase, program and read a serial flash device attached to one of the SPI controllers. [spi_master_slave](spi/spi_master_slave) | Demonstrate SPI communication as master and slave. [max7219_8x7seg_spi](spi/max7219_8x7seg_spi) | Attaching a Max7219 driving an 8 digit 7 segment display via SPI [max7219_32x8_spi](spi/max7219_32x8_spi) | Attaching a Max7219 driving an 32x8 LED display via SPI ### System App|Description ---|--- [boot_info](system/boot_info) | Demonstrate how to read and interpret sys info boot info. [hello_double_tap](system/hello_double_tap) | An LED blink with the `pico_bootsel_via_double_reset` library linked. This enters the USB bootloader when it detects the system being reset twice in quick succession, which is useful for boards with a reset button but no BOOTSEL button. [rand](system/rand) | Demonstrate how to use the pico random number functions. [narrow_io_write](system/narrow_io_write) | Demonstrate the effects of 8-bit and 16-bit writes on a 32-bit IO register. [unique_board_id](system/unique_board_id) | Read the 64 bit unique ID from external flash, which serves as a unique identifier for the board. ### Timer App|Description ---|--- [hello_timer](timer/hello_timer) | Set callbacks on the system timer, which repeat at regular intervals. Cancel the timer when we're done. [periodic_sampler](timer/periodic_sampler) | Sample GPIOs in a timer callback, and push the samples into a concurrency-safe queue. Pop data from the queue in code running in the foreground. [timer_lowlevel](timer/timer_lowlevel) | Example of direct access to the timer hardware. Not generally recommended, as the SDK may use the timer for IO timeouts. ### UART App|Description ---|--- [hello_uart](uart/hello_uart) | Print some text from one of the UART serial ports, without going through `stdio`. [lcd_uart](uart/lcd_uart) | Display text and symbols on a 16x02 RGB LCD display via UART [uart_advanced](uart/uart_advanced) | Use some other UART features like RX interrupts, hardware control flow, and data formats other than 8n1. ### Universal These are examples of how to build universal binaries which run on RP2040, and RP2350 Arm & RISC-V. These require you to set `PICO_ARM_TOOLCHAIN_PATH` and `PICO_RISCV_TOOLCHAIN_PATH` to appropriate paths, to ensure you have compilers for both architectures. App|Description ---|--- [blink](universal/CMakeLists.txt#L126) | Same as the [blink](blink) example, but universal. [hello_universal](universal/hello_universal) | The obligatory Hello World program for Pico (USB and serial output). On RP2350 it will reboot to the other architecture after every 10 prints. [nuke_universal](universal/CMakeLists.txt#L132) | Same as the [nuke](flash/nuke) example, but universal. On RP2350 runs as a packaged SRAM binary, so is written to flash and copied to SRAM by the bootloader ### USB Device #### TinyUSB Examples Most of the USB device examples come directly from the TinyUSB device examples directory [here](https://github.com/hathach/tinyusb/tree/master/examples/device). Those that are supported on RP2040 devices are automatically included as part of the pico-examples build as targets named `tinyusb_dev_<example_name>`, e.g. https://github.com/hathach/tinyusb/tree/master/examples/device/hid_composite is built as `tinyusb_dev_hid_composite`. At the time of writing, these examples are available: - tinyusb_dev_audio_4_channel_mic - tinyusb_dev_audio_test - tinyusb_dev_board_test - tinyusb_dev_cdc_dual_ports - tinyusb_dev_cdc_msc - tinyusb_dev_dfu - tinyusb_dev_dfu_runtime - tinyusb_dev_dynamic_configuration - tinyusb_dev_hid_composite - tinyusb_dev_hid_generic_inout - tinyusb_dev_hid_multiple_interface - tinyusb_dev_midi_test - tinyusb_dev_msc_dual_lun - tinyusb_dev_net_lwip_webserver - tinyusb_dev_uac2_headset - tinyusb_dev_usbtmc - tinyusb_dev_video_capture - tinyusb_dev_webusb_serial Whilst these examples ably demonstrate how to use TinyUSB in device mode, their `CMakeLists.txt` is set up in a way tailored to how TinyUSB builds their examples within their source tree. For a better example of how to configure `CMakeLists.txt` for using TinyUSB in device mode with the Raspberry Pi SDK see below: #### SDK build example App|Description ---|--- [dev_hid_composite](usb/device/dev_hid_composite) | A copy of the TinyUSB device example with the same name, but with a CMakeLists.txt which demonstrates how to add a dependency on the TinyUSB device libraries with the Raspberry Pi Pico SDK #### Low Level example App|Description ---|--- [dev_lowlevel](usb/device/dev_lowlevel) | A USB Bulk loopback implemented with direct access to the USB hardware (no TinyUSB) ### USB Host All the USB host examples come directly from the TinyUSB host examples directory [here](https://github.com/hathach/tinyusb/tree/master/examples/host). Those that are supported on RP2040 devices are automatically included as part of the pico-examples build as targets named `tinyusb_host_<example_name>`, e.g. https://github.com/hathach/tinyusb/tree/master/examples/host/cdc_msc_hid is built as `tinyusb_host_cdc_msc_hid`. At the time of writing, there is only one host example available: - tinyusb_host_cdc_msc_hid ### USB Dual Mode USB Dual Mode uses PIO as a USB host controller and the RP2040 USB device controller as a device controller. All the USB dual examples come directly from the TinyUSB dual examples directory [here](https://github.com/hathach/tinyusb/tree/master/examples/dual). Those that are supported on RP2040 devices are automatically included as part of the pico-examples build as targets named `tinyusb_dual_<example_name>`, e.g. https://github.com/hathach/tinyusb/tree/master/examples/dual/host_hid_to_device_cdc is built as `tinyusb_dual_host_hid_to_device_cdc`. At the time of writing, there is only one dual example available: - tinyusb_dual_host_hid_to_device_cdc ### Watchdog App|Description ---|--- [hello_watchdog](watchdog/hello_watchdog) | Set the watchdog timer, and let it expire. Detect the reboot, and halt. ", Assign "at most 3 tags" to the expected json: {"id":"3315","tags":[]} "only from the tags list I provide: [{"id":77,"name":"3d"},{"id":89,"name":"agent"},{"id":17,"name":"ai"},{"id":54,"name":"algorithm"},{"id":24,"name":"api"},{"id":44,"name":"authentication"},{"id":3,"name":"aws"},{"id":27,"name":"backend"},{"id":60,"name":"benchmark"},{"id":72,"name":"best-practices"},{"id":39,"name":"bitcoin"},{"id":37,"name":"blockchain"},{"id":1,"name":"blog"},{"id":45,"name":"bundler"},{"id":58,"name":"cache"},{"id":21,"name":"chat"},{"id":49,"name":"cicd"},{"id":4,"name":"cli"},{"id":64,"name":"cloud-native"},{"id":48,"name":"cms"},{"id":61,"name":"compiler"},{"id":68,"name":"containerization"},{"id":92,"name":"crm"},{"id":34,"name":"data"},{"id":47,"name":"database"},{"id":8,"name":"declarative-gui "},{"id":9,"name":"deploy-tool"},{"id":53,"name":"desktop-app"},{"id":6,"name":"dev-exp-lib"},{"id":59,"name":"dev-tool"},{"id":13,"name":"ecommerce"},{"id":26,"name":"editor"},{"id":66,"name":"emulator"},{"id":62,"name":"filesystem"},{"id":80,"name":"finance"},{"id":15,"name":"firmware"},{"id":73,"name":"for-fun"},{"id":2,"name":"framework"},{"id":11,"name":"frontend"},{"id":22,"name":"game"},{"id":81,"name":"game-engine "},{"id":23,"name":"graphql"},{"id":84,"name":"gui"},{"id":91,"name":"http"},{"id":5,"name":"http-client"},{"id":51,"name":"iac"},{"id":30,"name":"ide"},{"id":78,"name":"iot"},{"id":40,"name":"json"},{"id":83,"name":"julian"},{"id":38,"name":"k8s"},{"id":31,"name":"language"},{"id":10,"name":"learning-resource"},{"id":33,"name":"lib"},{"id":41,"name":"linter"},{"id":28,"name":"lms"},{"id":16,"name":"logging"},{"id":76,"name":"low-code"},{"id":90,"name":"message-queue"},{"id":42,"name":"mobile-app"},{"id":18,"name":"monitoring"},{"id":36,"name":"networking"},{"id":7,"name":"node-version"},{"id":55,"name":"nosql"},{"id":57,"name":"observability"},{"id":46,"name":"orm"},{"id":52,"name":"os"},{"id":14,"name":"parser"},{"id":74,"name":"react"},{"id":82,"name":"real-time"},{"id":56,"name":"robot"},{"id":65,"name":"runtime"},{"id":32,"name":"sdk"},{"id":71,"name":"search"},{"id":63,"name":"secrets"},{"id":25,"name":"security"},{"id":85,"name":"server"},{"id":86,"name":"serverless"},{"id":70,"name":"storage"},{"id":75,"name":"system-design"},{"id":79,"name":"terminal"},{"id":29,"name":"testing"},{"id":12,"name":"ui"},{"id":50,"name":"ux"},{"id":88,"name":"video"},{"id":20,"name":"web-app"},{"id":35,"name":"web-server"},{"id":43,"name":"webassembly"},{"id":69,"name":"workflow"},{"id":87,"name":"yaml"}]" returns me the "expected json"