This example demonstrates how to use a CH32V003 microcontroller to communicate with DS18S20, DS1820, DS18B20, or DS1822 temperature sensors using the OneWire protocol. The CH32V003 is a cost-effective 48 MHz RISC-V microcontroller with 16kB of flash and 2kB of RAM, suitable for various applications.

• Searches for temperature sensors on Pin C4.
• Iterates over each sensor to prompt a temperature read.
• Waits for the read to occur and then prints the temperatures.
• Utilizes printf() over the CHLINK single-wire serial interface for output.

• For detailed installation instructions of the development environment, refer to the ch32v003fun project wiki.
• The project supports printf debugging and gdbserver-style debugging via minichlink.
• Building and flashing instructions can be found in the examples/blink directory.

• SWIO on PD1 is required for programming/debugging.
• PC4 connected to DS18x20 sensor data. (Don't forget the external pull-up resistor to VCC)

• For more examples and third-party tools, check out ch32v003fun_wildwest and ch32v003fun_libs.
• Join the Discord community for support and discussion.

• Setting up the Development Environment for CH32V003: Compile and Run first example code
• CH32V003: GPIO as Output
• CH32V003: GPIO as Input (Polling, Interrupt)
• CH32V003: UART Transmit / Receive data
• CH32V003: PWM output with Frequency and Duty Cycle Control
• CH32V003: ADC for analog signal measurement
• CH32V003: I2C Interface
• CH32V003: SPI Interface
• CH32V003: Timer Interrupt
• CH32V003: How to read 64-bit Unique ID

• The example is compatible with DS18S20, DS1820, DS18B20, and DS1822 temperature sensors.
• The simplified Maximum OneWire library is designed to efficiently handle communication with multiple sensors over a single wire.

• The CH32V003 operates at different performance levels depending on whether it runs from RAM or FLASH due to varying wait states.
• For further technical details, refer to the Debugging Manual and Processor Manual.
• An external oscillator was used during testing.

• CH32V003 Microcontroller Details
  • Features a 48MHz system main frequency, 2KB SRAM, 16KB Flash.
  • Includes a variety of peripherals such as USART, I2C, SPI, ADC, and timers.
  • Offers multiple low-power modes and a 1-wire serial debug interface.

In a tiny world of silicon and wire,

Lives a microcontroller, CH32V003, with a desire.

To speak in tongues of RISC-V, so clear,

Whispering to sensors, both far and near.

Through OneWire it travels, a single thread,

Carrying tales of temperatures, both blue and red.

"Too hot or cold?" the sensors keenly measure,

In a dance of bytes, they find their treasure.

In this realm of circuits, small and spry,

Micro wonders unfold, under the digital sky.