This is the sdk branch that integrates uLisp with BL602 IoT SDK. Read the article...

• "Rust on RISC-V BL602: Rhai Scripting"

We expose a C function from BL602 IoT SDK like so: ulisp.c

//  Expose the C function `bl_gpio_output_set` to uLisp:
//  `int bl_gpio_output_set(uint8_t pin, uint8_t value)`
object *fn_bl_gpio_output_set(object *args, object *env) {
  //  Fetch the `pin` parameter from uLisp
  assert(args != NULL);
  int pin = checkinteger(BL_GPIO_OUTPUT_SET, car(args));
  args = cdr(args);

  //  Fetch the `value` parameter from uLisp
  assert(args != NULL);
  int value = checkinteger(BL_GPIO_OUTPUT_SET, car(args));
  args = cdr(args);

  //  No more parameters
  assert(args == NULL);

  //  Call the C function `bl_gpio_output_set`
  int result = bl_gpio_output_set(pin, value);

  //  Return the result to uLisp
  return number(result);
}

Which will be called from uLisp like so...

( bl_gpio_output_set 11 0 )

(More about this)

What if we...

1. Compile the uLisp Interpreter to WebAssembly...

2. Use the WebAssembly version of uLisp to simulate BL602 in a Web Browser...

   (Including GPIO, I2C, SPI, Display Controller, Touch Controller, LoRaWAN... Similar to this)

3. Integrate the BL602 Emulator with Blockly...

4. To allow embedded developers to preview their BL602 Blockly Apps in the Web Browser?

Let's try this out here with the wasm branch of ulisp-bl602

• Watch the uLisp WebAssembly demo on YouTube

• Try uLisp WebAssembly here

The BL602 Simulator also works with Blockly to preview for dragged-and-dropped uLisp Blockly Apps...

• Watch the BL602 Simulator + uLisp WebAssembly + Blockly demo on YouTube

• Try BL602 Simulator + uLisp WebAssembly + Blockly here

• uLisp Blockly source code

Check this Twitter Thread for updates...

• Follow the Twitter Thread

• src/ulisp.c: uLisp Interpreter for BL602 and WebAssembly, ported from uLisp for ESP32

• wasm/wasm.c: WebAssembly integration for uLisp (JSON Stream for Simulation Events)

• docs/ulisp.html: HTML file with JavaScript that invokes uLisp WebAssembly for REPL

• wasm.mk: Build uLisp WebAssembly with Emscripten

To build uLisp for WebAssembly with Emscripten...

make -f wasm.mk

The compiled files ulisp.js and ulisp.wasm will be copied to docs.

To test, run a local web server and browse to docs/ulisp.html.

(WebAssembly requires a local web server, it won't run from the local filesystem)

A version of the Lisp programming language for BL602 RISC-V boards.

Read the article...

• uLisp and Blockly on PineCone BL602 RISC-V Board

uLisp was ported to BL602 from ESP32 Arduino...

https://github.com/technoblogy/ulisp-esp

BL602 uLisp Firmware sdk_app_ulisp is located here...

https://github.com/lupyuen/bl_iot_sdk/tree/ulisp/customer_app/sdk_app_ulisp

For more information about uLisp...

http://www.ulisp.com/show?21T5