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- Remove touchscreen WiFi setup (touch.c, keyboard.c, wifi_setup.c from build)
- Remove offscreen buffer and landscape rotation from axs15231b driver
- Add /setup HTML page with WiFi scan/connect via captive portal
- Add /wifi/scan, /wifi/connect, /wifi/status HTTP endpoints
- Display shows SETUP_PENDING (QR + SSID + setup URL) when unconfigured
- Display shows ERROR with setup URL when upstream is down
- All 101 unit tests pass, builds and flashes to Board C
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highlight feedback
- Render functions use axs15231b_get_width/height() instead of hardcoded coords
- render_wifi_setup_list: dynamic item widths, screen-relative cancel button
- render_wifi_setup_password: dynamic field/eye/keyboard from kb_get_layout()
- render_wifi_setup_result: centered on screen, dynamic button placement
- handle_wifi_setup_touch: matching dynamic hit areas, highlight_rect() feedback
- Rotation lifecycle: enter_wifi_setup_rotation/exit wired into all entry/exit paths
- display_enter_wifi_setup + READY/ERROR touch + SUCCESS auto-return + LIST cancel
- Added kb_result_t typedef to keyboard.h (was only in .c)
- Fixed test_keyboard.c: use computed offsets from kb_layout_t defaults
- All 101 unit tests pass (touch:19, keyboard:46, wifi_setup:36)
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- KB_START_Y was 310 but keyboard rendered at y=70 — touch hits never matched
- Row 3 simplified to 3 keys: [layer/shift, space, done]
- All 362 unit tests pass
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- Check network_count == 0 before modulo operation
- Disconnect STA before WiFi scan to avoid 'STA is connecting, scan not allowed'
- Add error handling for failed WiFi scans
- This fixes the crash/restart loop on Board C with no configured WiFi
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- Add DISPLAY_WIFI_SETUP state with full rendering pipeline
- Touch init on display_init(), touch polling in display task
- WiFi scan triggered on setup entry, sorted AP list
- On-screen keyboard for password entry
- Connect result via WiFi event notifications
- Setup button on READY and ERROR screens
- Auto-enter WiFi setup on first boot with no credentials
- Save new WiFi credentials to SPIFFS config.json
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- Periodic refresh: wallet balance + client count every 5s from main loop
- display_notify_payment() API: passes payment amount and time allotment
- tollgate_api.c: triggers PAYMENT_RECEIVED state after wallet receive
- AP station events update client count in real-time
- Config data (price, mint) passed to display during boot phase
- Payment screen shows actual sats paid and time purchased
- Updated DISPLAY_UI_PLAN.md with state-sync audit and checklist
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- BOOT screen: centered title + WiFi status line
- READY screen: QR cycling (WiFi/Portal), price, mint domain,
wallet balance (color-coded), client count
- PAYMENT screen: green banner 'ACCESS GRANTED', paid amount, time
- ERROR screen: red banner 'NO UPSTREAM', guidance, AP reassurance
- Enhanced display_update() API with mint_url, price, wifi_status
- Extract domain helper for clean mint URL display
- Render interval: 2s (reduced SPI load)
- Color palette: cyan, yellow, orange, green, red, dim gray
- WiFi events update display status and trigger ERROR state
- Board C now on /dev/ttyACM3
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Root cause: missing RAMWR (0x2C) command before pixel data transfer.
Without RAMWR, the display didn't know to write data into the RAM window
set by CASET/RASET, causing wrapping and double-vision artifacts.
- Add qspi_write_command(RAMWR) before pixel data in flush()
- Use internal DMA byte-swap buffer (MALLOC_CAP_DMA) for correct colors
- Reduce font scale: TollGate scale 2, starting... scale 1
- Centered text positions for 320x480 portrait
Display now shows: blue TollGate + yellow starting... on black
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- Allocate 4KB internal DMA buffer (MALLOC_CAP_DMA) for pixel byte-swap
- Byte-swap from PSRAM framebuffer into DMA buffer in 2048-pixel chunks
- Matches ArduinoGFX approach: separate DMA buffer avoids PSRAM cache issues
- Restore render-on-change logic (only redraw on state/QR mode change)
- Use saturated colors: cyan 0x07FF for title, yellow 0xFFE0 for subtitle
- Remove debug flush log message
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- DISPLAY_FIX_PLAN.md: root cause analysis, byte-order mismatch,
PSRAM cache coherency issue, reference implementations studied
- axs15231b.c: QSPI protocol rewrite with correct ArduinoGFX framing
(cmd=0x02 for regs, cmd=0x32/addr=0x003C00 for pixels)
- display.c: portrait centering for 320x480, render-on-change logic
- Makefile: Board C support (flash-c, lock-c)
- axs15231b.h: QSPI command/address constants
Display shows recognizable text, colors wrong due to byte-swap
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