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# RISC-V Phone
The goal of the this project is to develop a privacy enhanced, simple and fully featured mobile phone.
**Technical specs**:
- CPU: SiFive Freedom E310 (FE310-G002) microcontroller
- WiFi/BT: Espressif ESP32
- Graphics: BT815 Display/Touch Controller
- Baseband: Mini PCIe module (SIMCom SIM7600X or Quectel EC-25)
- Audio: MAX98357A Class D amplifier / ICS-43434 MEMS Microphone
- Accelerometer: LSM9DS1 - gyro, accel, magnetometer
- Haptic driver: DRV2605L
- NXP i.MX8M System-on-Module daughterboard
##1. Building
Follow theese instructions to build both FE310 and ESP32 firmware.
###1.1 Install prerequisites
You will need the following software available on your machine:
- git
- GNU Make
- RISC-V GNU Toolchain
- RISC-V OpenOCD
- ESP-IDF from Espressif
Binary RISC-V GNU Toolchain and OpenOCD are available from SiFive at [https://github.com/sifive/freedom-tools/releases](https://github.com/sifive/freedom-tools/releases)
Download and unpack the archives for your platform and export `RISCV_PATH` and `RISCV_OPENOCD_PATH` variables:
```
export RISCV_PATH=/path/to/riscv64-gcc
export RISCV_OPENOCD_PATH=/path/to/riscv-openocd
```
To install ESP-IDF follow instructions from [ESP-IDF Programming Guide](https://docs.espressif.com/projects/esp-idf/en/stable/get-started/index.html#installation-step-by-step). Install version 4.2 or later.
###1.2 Obtain source
This repository can be cloned by running the following command:
```
git clone git://majstor.org/rvPhone.git
```
Repository contains following directories:
- `hw/rvPhone`: KiCad v5 project that contains schematics and board layout
- `fw/fe310`: Firmware for Freedom FE310-G002 SoC
- `fw/esp32`: Firmware for Espressif ESP32 SoC
###1.3 Build
To build firmware for FE310 run follwing commands:
```
cd <path to repository>/fw/fe310
make
cd test
make upload
```
To build firmware for ESP32 run following commands:
```
cd <path to repository>/fw/esp32
make menuconfig
make
make flash
```
In `make menuconfig`, please make sure that `Enable PPP support` is selected under `Component config -> LWIP` menu and that `Notify Phase Callback`, `PAP Support` and `CHAP Support` are selected under PPP menu.
##2. License
Hardware licensed under the [CERN OHL v1.2](https://ohwr.org/project/licenses/wikis/cern-ohl-v1.2)
Software licensed under the [GPLv2](https://www.gnu.org/licenses/old-licenses/gpl-2.0.en.html)
##3. Acknowledgments
This project is supported by the [NGI Zero PET](https://nlnet.nl/PET) project, a fund established by [NLnet](https://nlnet.nl) foundation with financial support from the European Commission's [Next Generation Internet](https://ngi.eu/) programme, under the aegis of DG Communications Networks, Content and Technology. NGI Zero PET project has received funding from the European Union's [Horizon 2020](https://ec.europa.eu/programmes/horizon2020/) research and innovation programme under grant agreement No 825310.
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