tfaour
b9649c35ec
The panel driver now splits writing a frame into its SPI buffer (epd_write_frame(), which also computes a CRC32 as it streams) from actually triggering the physical refresh (epd_turn_on_display()). frame_client.c compares the new CRC against the last one that was actually refreshed (persisted in NVS) and skips the refresh entirely when they match -- e.g. a reboot redisplaying the same photo before the server's refresh interval elapsed no longer causes a visible flash for no visual change. Also reorders the per-wake fetch cycle: the image fetch (15s timeout) now goes before the config check (3s timeout), instead of after. The config check's tighter timeout was intermittently tripping on connection-setup latency that's common on the first request after waking from a long deep sleep (e.g. stale ARP); putting the more tolerant request first absorbs that latency, and the config check then rides the connection it already warmed up.
74 lines
2.7 KiB
C
74 lines
2.7 KiB
C
#pragma once
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#include <stdbool.h>
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#include <stddef.h>
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#include "esp_err.h"
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#define FRAME_CFG_SSID_MAX_LEN 32
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#define FRAME_CFG_PASSWORD_MAX_LEN 64
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#define FRAME_CFG_SERVER_MAX_LEN 128
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#define FRAME_AP_PASSWORD_LEN 10
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typedef struct {
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char sta_ssid[FRAME_CFG_SSID_MAX_LEN + 1];
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char sta_password[FRAME_CFG_PASSWORD_MAX_LEN + 1];
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char toolsserver[FRAME_CFG_SERVER_MAX_LEN + 1];
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} frame_config_t;
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/**
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* Loads the saved home-network config from NVS.
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* Returns ESP_ERR_NVS_NOT_FOUND if the device has never been provisioned.
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*/
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esp_err_t frame_config_load(frame_config_t *out);
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/** Saves the home-network config to NVS. Resets the "connected once"
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* flag below, since this is a fresh (re)provisioning event. */
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esp_err_t frame_config_save(const frame_config_t *cfg);
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/**
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* Whether the device has already shown the post-connect status screen at
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* least once since the current WiFi config was saved. Used so the status
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* screen always shows on the first connection after (re)provisioning, but
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* is skipped on later successful wakes to save an extra refresh.
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*/
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bool frame_config_has_connected_once(void);
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/** Marks the status screen as having been shown for the current WiFi config. */
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void frame_config_mark_connected_once(void);
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/**
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* Erases the stored home-network config (SSID/password/tools server) so the
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* device falls back into provisioning on its next boot. Leaves the softAP
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* identity (SSID/password) untouched, since that's tied to the device
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* itself, not a particular home network -- regenerating it on every reset
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* would force re-scanning the join QR code for no reason. Also leaves the
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* last-displayed-photo CRC (below) untouched -- it describes what's
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* physically on screen, not network config, and stays valid regardless.
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*/
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void frame_config_clear(void);
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/**
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* Returns the CRC32 of the last frame actually written to the panel via a
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* physical refresh. Returns ESP_ERR_NVS_NOT_FOUND if nothing's been
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* displayed yet.
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*/
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esp_err_t frame_config_get_last_display_crc32(uint32_t *out);
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/** Records the CRC32 of the frame just displayed, for next time. */
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void frame_config_set_last_display_crc32(uint32_t crc32);
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/**
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* Returns this device's provisioning AP identity: a fixed SSID (from
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* Kconfig) and a password that's generated once on first use and persisted
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* in NVS from then on. The password is drawn from an easy-to-type charset
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* since it's shown on the e-ink panel (as both a QR code and plaintext) and
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* may need to be typed in by hand.
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*/
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void ap_identity_get(char *ssid_out, size_t ssid_len, char *pass_out, size_t pass_len);
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/**
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* Brings up the ESPRESSO softAP + captive portal (DNS + HTTP) so the user
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* can provision the device. Does not return.
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*/
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void wifi_provisioning_start(void);
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