threadx_blink Directory Reference

Directory dependency graph for threadx_blink:

Directories
	src

Detailed Description

ThreadX bring-up on the EK-RA8D2: two same-priority threads blinking LED1 and LED2 at different rates. It exercises the project's port glue under port/threadx/src/cortex_m85/ and the vendored upstream Cortex-M85 port, driving the same GPIO paths blink_hal uses but from RTOS threads rather than a busy-wait.

Bring the CGC up before tx_kernel_enter. The SysTick reload in tx_initialize_low_level.S is computed for the 1 GHz clock. If the chip is still on the boot-default MOCO (~8.4 MHz) when the scheduler starts, that same reload takes about 119 ms of wallclock per tick instead of 1 ms, so a half-second sleep stretches to about a minute and the LED looks frozen in any reasonable observation window. A wrong clock here reads as a dead board, not as a slow one.

src/main.c overrides SysTick_Handler to tail-call _tx_timer_interrupt; PendSV_Handler and SVC_Handler arrive from the upstream port as strong symbols and displace the weak aliases in the board layer's libs/ra8_board_ek_ra8d2/src/boot/vector_table.c automatically.

LED1 / LED2 are P600 / P303 per EK-RA8D2 v1 UM Table 24 p 31.