disPOD

disPOD modules

disPOD consists of several modules:

main.c

• void app_main() does adjustment of log level, initialization of NVS Flash, SPIFFS file system, disPOD overall initialization (event groups: dispod_event_groups, dispod_display_evg, queue: running_values_queue) and runs the different tasks (dispod_collector_task, dispod_update_task, dispod_screen_task, dispod_archiver_task)
• run_on_event is the overall program logic
• At the end of app_main() the event to startup disPOD (DISPOD_STARTUP_EVT) is put in the loop.

dispod_gattc.h and dispod_gattc.c

• handles all the BLE process from scanning for devices, connecting, register notification and receiving/forwarding notifications.

dispoD_wifi.h and dispod_wifi.c

• by calling dispod_wifi_network_up()the connection to WiFi is made, using the predefined SSID/PWD combinations. Also, an event handler is registered for the internal WiFi connection process and update of the disPOD WiFi status.

dispod_sntp.h and dispod_sntp.c

• When WiFi is available, a call to dispod_sntp_check_time() tries to update the time. The time is used for time stamps during logging the running data, and correct time stamps of the SD card files.

dispod_tft.h and dispod_tft.c

• HW initialization is done in void dispod_display_initialize()
• functions to udpate the data to display on the TFT are provided
• functions to actually draw the screens are provided

dispod_runvalues.h and dispod_runvalues.c

• structures to hold the data are given
• functions to calculate the mean to smoothen the received values from the BLE device are provided

dispod_archiver.h and dispod_archiver.c

• data structures and functions to store the running data in an array an to bulk write to SD card as soon as at least one buffer is complete.

dispod_ledc.h and dispod_ledc.c

• functions to output a beep are provided (will be used for the metronome) are provided.

Used components

Copied from espressif/esp-iot-solution, #49f305f

• components/button
• components/general/debugs (unused)
• components/general/ota (unused)
• components/general/param (unused)
• components/wifi_conn (unused)

Copied from ESP32_TFT_library, #aa21772

• components/spidriver
• components/tft
• tools/
• main/tft_demo.c used as a basis for my own programming

Data Flow

Tasks and Modules

dispod_collector_task:

• From dispod_gattc.c for each BLE notification received the function gattc_profile_event_handler() will be called for an ESP_GATTC_NOTIFY_EVT event
• the payload is deserialized
• the element containing the data (RSC or custom profile) will be put in the running_values_queue using the typedef struct running_values_queue_element_t.

dispod_update_task

• task is blocked until the queue running_values_queue contains at least one element.
• the head element will be removed from the queue
• this item will be stored in the archivers buffer (w/o any queue)
• and also the values will be used to smoothen the values to display and hand over to the dispod_screen_task, a call to TODO (w/o any queue)

dispod_screen_task

• blocked until DISPOD_DISPLAY_UPDATE_BIT in dispod_display_evg set
• update the screen or change the screen (e.g. from status to running values )

dispod_archiver_task

• if a buffer is completed, write to disk
• if DISPOD_SD_WRITE_COMPLETED_BUFFER_EVT in the event group EventGroupHandle_t dispod_sd_evg is set, write all completed buffers to SD card
• if DISPOD_SD_WRITE_CURRENT_BUFFER_EVT in the event group EventGroupHandle_t dispod_sd_evg is set, write the current (partial) buffer to SD card

Layout

Running Values Screen

Overall

• Font: DEJAVU24_FONT
• xPad = 10
• 10 (xPad) + 60 (XXX) + 10 (xPad) + 60 (123) + 20 (2*xPad) + 150 Indikator/Fields/... + 10 (xPad)
• Indikator x

Testing

Queues and Calculation and Display

grep log file

AKAEM@PC MINGW32 ~/esp/disPOD $ grep -e "DISPOD_UPDATER.*0x2a53" -e "DISPOD_UPDATER.0xFF00" -e "val2dis" -e "DISPOD_RUNVALUES.," Logs/logs.txt

Pattern to look for

I (25905) DISPOD_UPDATER: received from queue: 0x2a53: C 97 I (25936) DISPOD_RUNVALUES: dispod_runvalues_calculate_display_values(), cadence 97 I (25999) DISPOD_UPDATER: received from queue: 0xFF00: Str 1 Sta 262 I (26027) DISPOD_RUNVALUES: dispod_runvalues_calculate_display_values(), GCT 262, strike 1 I (26036) DISPOD_RUNVALUES: dispod_runvalues_calculate_display_values(), cad [ 97 0 0 0 0], num 1, sum 97, val2dis 194 I (26048) DISPOD_RUNVALUES: dispod_runvalues_calculate_display_values(), GCT [262 0 0 0 0], num 1, sum 262, val2dis 262 I (26061) DISPOD_RUNVALUES: dispod_runvalues_calculate_display_values(), str [ 1 0 0 0 0], num 1, sum 1, val2dis 10

components\arduino\cores\esp32\IPAddress.h -> comment out last line // const IPAddress INADDR_NONE(0, 0, 0, 0);

NeoPixelBus -> change in component.mk COMPONENT_SRCDIRS := src src/internal . COMPONENT_ADD_INCLUDEDIRS := src src/internal .