GPIO

• http://bugs.libre-riscv.org/show_bug.cgi?id=15
• https://github.com/sifive/sifive-blocks/tree/master/src/main/scala/devices/ includes GPIO, SPI, UART, JTAG, I2C, PinCtrl, UART and PWM. Also included is a Watchdog Timer and others.
• https://bitbucket.org/casl/c-class/src/0e77398a030bfd705930d0f1b8b9b5050d76e265/src/peripherals/gpio/?at=master