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gimlet-seq-server: start driving fault pin. #1556

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merged 1 commit into from
Nov 3, 2023
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gimlet-seq-server: start driving fault pin. #1556

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16 changes: 16 additions & 0 deletions drv/gimlet-seq-server/src/main.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -115,6 +115,16 @@ fn main() -> ! {
let jefe = Jefe::from(JEFE.get_task_id());
let hf = hf_api::HostFlash::from(HF.get_task_id());

// Ensure the SP fault pin is configured as an open-drain output, and pull
// it low to make the sequencer restart externally visible.
sys.gpio_configure_output(
FAULT_PIN_L,
sys_api::OutputType::OpenDrain,
sys_api::Speed::Low,
sys_api::Pull::None,
);
sys.gpio_reset(FAULT_PIN_L);

// Turn off the chassis LED, in case this is a task restart (and not a
// full chip restart, which would leave the GPIO unconfigured).
sys.gpio_configure_output(
Expand Down Expand Up @@ -403,6 +413,10 @@ fn main() -> ! {
sys_api::Pull::None,
);

// Clear the external fault now that we're about to start serving messages
// and fewer things can go wrong.
sys.gpio_set(FAULT_PIN_L);

loop {
idol_runtime::dispatch_n(&mut buffer, &mut server);
}
Expand Down Expand Up @@ -1135,6 +1149,8 @@ cfg_if::cfg_if! {

// SP_STATUS_LED
const CHASSIS_LED: sys_api::PinSet = sys_api::Port::A.pin(3);
// SP_TO_IGNIT_FAULT_L
const FAULT_PIN_L: sys_api::PinSet = sys_api::Port::A.pin(15);

// Gimlet provides external pullups.
const PGS_PULL: sys_api::Pull = sys_api::Pull::None;
Expand Down