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rp2/rp2_pio: Configure jmp_pin for PIO use if it's isolation is set.

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Signed-off-by: Damien George <damien@micropython.org>
This commit is contained in:
Damien George
2025-07-29 17:19:09 +10:00
parent dea949e860
commit 41987c6cf4
1 changed files with 15 additions and 1 deletions
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16
ports/rp2/rp2_pio.c
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@@ -683,8 +683,10 @@ static mp_obj_t rp2_state_machine_init_helper(const rp2_state_machine_obj_t *sel
}
// Configure jmp pin, if needed.
int jmp_pin = -1;
if (args[ARG_jmp_pin].u_obj != mp_const_none) {
sm_config_set_jmp_pin(&config, mp_hal_get_pin_obj(args[ARG_jmp_pin].u_obj));
jmp_pin = mp_hal_get_pin_obj(args[ARG_jmp_pin].u_obj);
sm_config_set_jmp_pin(&config, jmp_pin);
}
// Configure sideset pin, if needed.
@@ -716,6 +718,18 @@ static mp_obj_t rp2_state_machine_init_helper(const rp2_state_machine_obj_t *sel
if (set_config.base >= 0) {
asm_pio_init_gpio(self->pio, self->sm, &set_config);
}
#if !PICO_RP2040
if (jmp_pin >= 0) {
// On RP2350 pins by default have their isolation enabled. This means they will
// not work as input to a PIO without further configuration. That's different to
// RP2040 where pins can work as PIO input from a reset. To make RP2350 have
// similar behaviour as RP2040, configure the jmp pin for PIO use if it's isolation
// is enabled (which means it's probably unconfigured from reset).
if (pads_bank0_hw->io[jmp_pin] & PADS_BANK0_GPIO0_ISO_BITS) {
pio_gpio_init(self->pio, jmp_pin);
}
}
#endif
if (sideset_config.base >= 0) {
asm_pio_init_gpio(self->pio, self->sm, &sideset_config);
}