diff options
| author | hathach <[email protected]> | 2026-04-21 19:44:10 +0700 |
|---|---|---|
| committer | hathach <[email protected]> | 2026-04-21 19:44:10 +0700 |
| commit | d0c550cadceff3fdf30060f4ac0ebf919e5934a1 (patch) | |
| tree | 74118fd0fd1b10095773d848fbe8d814535ae937 /hw | |
| parent | 100cfd6360ddd0c94a0aaeaa2da05449c0648dc1 (diff) | |
enable double buffer for tm4c
Diffstat (limited to 'hw')
| -rw-r--r-- | hw/bsp/tm4c/family.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/hw/bsp/tm4c/family.c b/hw/bsp/tm4c/family.c index 6988a264e..c5e4bd64e 100644 --- a/hw/bsp/tm4c/family.c +++ b/hw/bsp/tm4c/family.c @@ -58,6 +58,14 @@ static void board_button_init(GPIOA_Type* port, uint8_t PinMsk) { /* Set direction */ port->DIR &= ~PinMsk; + + /* Enable internal pull so the idle state is deterministic. LaunchPad buttons + * connect the pin to GND when pressed (active-low) and require a pull-up. */ +#if BUTTON_STATE_ACTIVE == 0 + port->PUR |= PinMsk; +#else + port->PDR |= PinMsk; +#endif } static void board_led_init(GPIOA_Type* port, uint8_t PinMsk, uint8_t dirmsk) { |