stnolting/neorv32: v1.6.2

This list shows the main core changes since the last release. See the project's changelog for more information.

• fixed signal and generic propagation in rtl/system_integration and setups/radiant/UPduino_v3

• :warning: changes handling of software makefile's MARCH and MABI variables (see #184): omitting -march and -mabi flags for these variables
• :warning: reworked fast interrupt request (FIRQ) CPU system: FIRQs are now high-level-triggered and have to stay asserted until explicitly acknowledged (see #176)
• :warning: removed mstatus.TW (timeout wait) CSR bit: wfi instruction is now always allowed to execute in less-privileged modes
• :warning: removed sleep_i signal of custom functions subsystem (CFS)
• :lock: CPU now ensures that all illegal instructions do not commit any potential architecture state changes
• on-chip debugger: wfi now executes as nop when in debug-mode (also during single-stepping)
• NEOLED: added new control register bit to configure interrupt condition
• SLINK: added fine-grained per-link interrupt configuration (see #182)
• UART0, UART1: added optional and configurable RX and TX FIFOs, added fine-grained IRQ configuration (see #183)
• CPU logic, timing and area optimizations

Merged pull requests:

• #170 🐛 [rtl/system_integration] fix uart1 rx/tx signals
• #173 Add argument to makefile to simplify Continuous Integration flow
• #174 [setups/vivado] Mention the XHub Stores menu item for installing board support
• #175 [setups/vivado] Fix fileset paths
• #176 [rtl/core] make FIRQs level-triggered
• #177 [docs/datasheet] Fix neoled register bits documentation
• #178 [rtl/system_integration] add NEOLED FIFO depth generic to AXI4 wrapper
• #180 [docs/datasheet] fix neoled register table formatting
• #182 [SLINK] add fine-grained IRQ configuration
• #183 [UARTs] add RX & TX FIFOs
• #184 ⚠️ [makefile] modify handling of MARCH and MABI variables

Closed issues:

• #171 Make Check Fails (riscv32-unknown-elf-gcc is not found)
• #181 neorv32/docs/userguide/content.adoc en dash / em dash