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An ESP32-S3 DevKitC-1 on the bench network drives three relays at the machine's connectors so the acceptance tool can open the lid loop, pull the interlock loop and press the button with nobody in the room. Two contacts are normally closed in loops the safety chain already reads, the third is normally open across the button input and only ever pulsed (20 to 500 ms, the end armed before the line rises); every line is low at boot and after any reset, the task watchdog panics and reboots, and the button channel needs a jumper. HTTP on port 80 under a key in X-Fixture-Key; the hostname announced over DHCP and mDNS. ESP-IDF v5.5 native, the mDNS component pinned in dependencies.lock; fixture.env (git-ignored) is the one input: the wifi, the key, the hostname. fixture.sh builds with idf.py or in the espressif/idf container, flashes with esptool from pip. The decisions that need no hardware live in policy.c with a gcc host test; CI runs it and builds the firmware in the pinned container.
42 lines
1.4 KiB
C
42 lines
1.4 KiB
C
/*
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* forgefixture: the ForgeFIRM bench actuator. An ESP32-S3 on the bench
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* network drives three relays at the machine's connectors (the lid
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* loop, the interlock loop, the button) so the acceptance tool can open
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* a lid, pull an interlock or press the button without a hand in the
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* room. The firmware's whole job is to do exactly that on request, and
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* nothing at all otherwise: every line low at boot and after any reset,
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* the button only ever pulsed, every request under a key.
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*
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* (C) Copyright 2026
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* Scott Wiederhold, s.e.wiederhold@gmail.com
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* SPDX-License-Identifier: MIT
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*/
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#include "esp_log.h"
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#include "nvs_flash.h"
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#include "api.h"
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#include "fixture_config.h"
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#include "relays.h"
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#include "version.h"
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#include "wifi.h"
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static const char *TAG = "forgefixture";
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void app_main(void)
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{
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/* The relays first: whatever else happens at boot, the lines are low
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* before the radio or the server exist. */
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relays_init();
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esp_err_t r = nvs_flash_init();
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if (r == ESP_ERR_NVS_NO_FREE_PAGES || r == ESP_ERR_NVS_NEW_VERSION_FOUND) {
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ESP_ERROR_CHECK(nvs_flash_erase());
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r = nvs_flash_init();
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}
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ESP_ERROR_CHECK(r);
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ESP_LOGI(TAG, "forgefixture %s, hostname %s", FIXTURE_VERSION, FIXTURE_HOSTNAME);
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wifi_start(FIXTURE_HOSTNAME, FIXTURE_WIFI_SSID, FIXTURE_WIFI_PSK);
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api_start(FIXTURE_API_KEY, FIXTURE_HOSTNAME);
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}
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