![]() pointer points to the input when recalled in the main loop. The problem was solved simply by using the pointer (*) in the function parameter i.e. Now everything is consistent using the same file register.Īnother is when I tried to create file name by passing along the string from input parameter when using function in the main loop. declare file in setup, refer in and return from createFile, then refer in logGPSNMEA. The solution seems to be that instead of carrying the file name to be opened in the function, I can just reference the logfile over to the function (using & operator) i.e. I actually struggle a lot with the function that returns file type. But, remember to watch out for "fragmented heap" which could prevent us from really claiming back the dynamic space. This could be made better by de-allocating dynamic space. In creating functions, I can use the reclaimable stack space. SRAM allocation contains (1) Global and Static variables (2) Local variables (stack) (3) and Dynamic Allocations in between. SdFat sd Although it might be better to use "namespace" or "typedef" idk, have to read more. Instead of true header name, you can specify alias e.g. Uint8_t is used to specify that int is defined to be 8 bit which means uint16_t and uint32_t are 16 and 32 bits accordingly. void flash (uint8_t pin, char times = 0) ) Void logGPSNMEA (File & logfile) -> log GPS to specified fileĬhar timerswitch(uint8_t nswitch) -> switch operator by time pressedĭefault values for function parameters can be set at function declaration (e.g. Void flash (uint8_t pin, char times) -> replace manual LED blinkingįile createFile(File & logfile, char *prefix) -> generate file Since when the function closes, the memory allocated for stack (local variables) will be 100% reclaimed as free space thus, freeing up space and prevent RAM crashes. The two main reasons are that I'm trying to organize the code and trying to save memories esp. I'm trying more to break out the codes in the main loop into private functions. If not used, SIGNAL and useInterrupt can be deleted. Thus, this is mainly used for debugging to confirm what GPS is reading. useInterrupt allows the GPS to Serial.print the NMEA sentence (lastNMEA) even while loop is running. Interrupt is basically you are trying to do something while in the middle of other functions in this case main loop(). However, I saw no difference in dynamic memory i.e. ![]() Following some recommendations on forums, I decided to use SdFat.h instead of SD.h Although functions are more limited, it could save SRAM. $PMTK010,002*2D -> module is awake and waiting for input on the Serial connectionĪll of these indicate startup signals. $PMTK010,001*2E -> configuration is completed $PMTK011,MTKGPS*08 -> MTKGPS is a general chip identifier $PGACK,105*46 -> GPS initialization routine is done Alternative feedback: Toggle the LED on the rising edge of the debounced signal.$PGACK,103*40 -> getting ready for a cold-start (flushing all memory of previous fixes) Update the LED to show the debounced signal.ĭigitalWrite(LED_PIN, button_debouncer.Output()) Static Debouncer button_debouncer(BUTTON_PIN, DEBOUNCE_DELAY_ms) Successfully debounced, so update the outputs.Ĭonst int BUTTON_PIN = 2 // Pushbutton pin number.Ĭonst int LED_PIN = 13 // LED pin number.Ĭonst unsigned long DEBOUNCE_DELAY_ms = 50 // The debounce time in milliseconds. Else, compare the time difference with the debounce delay.Įlse if ((current_ms - last_ms) >= debounce_delay_ms) If there is no change, reset the debounce timer. and here, ensuring an accurate time stamp for the sample. ![]() Input_state = digitalRead(input_pin) // No interrupt will occur between here.Ĭurrent_ms = millis() //. ![]() Temporarily disable interrupts to ensure an accurate time stamp for the sample. Instead if detecting the edge (L to H), it detects the status, so the interrupt function repeats continuously if the state is H, so its behaving like a while(state=H) I am having such a nightmare to make it work, I am using a WEMOS D1R1 to handle the movement of an encoder via external interrupts.
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