Search found 5 matches

by Aldo_Lodos
Mon Nov 02, 2020 12:39 pm
Forum: ESP32 Arduino
Topic: Issue with the XMIT process of SerialHardware (TX buffering)
Replies: 0
Views: 203

Issue with the XMIT process of SerialHardware (TX buffering)

Hello I have an issue with the XMIT process of SerialHardware on an ESP32 TTGO T-Display On a 1200 bauds com I receive 10 to 15 byte messages separated by 20 to 60ms of silence The skecth is simple : read bytes on port 1 and write them on port 2 as soon as as they arrive Each time I receive the firs...
by Aldo_Lodos
Sun Nov 01, 2020 12:27 am
Forum: ESP32 Arduino
Topic: Question on Serial port with hardware Lib (arduino IDE)
Replies: 5
Views: 564

Re: Question on Serial port with hardware Lib (arduino IDE)

the explaination is : The Serial() driver code uses the 128 byte hardware fifo's of the UART. There are two case that trigger the emptying of the Fifo.: The UART hardware receives 112 or more bytes. Or, if the UART sees the receive pin inactive for two byte periods it triggers an interrupt to empty ...
by Aldo_Lodos
Fri Oct 30, 2020 9:41 pm
Forum: ESP32 Arduino
Topic: Question on Serial port with hardware Lib (arduino IDE)
Replies: 5
Views: 564

Re: Question on Serial port with hardware Lib (arduino IDE)

I tried to send 120 bytes in a row, MySerial1.available () waits to receive the first 112 bytes before returning a value > 0 (112 in fact), which means almost 1s delay before to be able to read the first byte ! IS there a way to change this behaviour and to read the bytes as they arrive ? 1 4 11 1 3...
by Aldo_Lodos
Fri Oct 30, 2020 7:01 pm
Forum: ESP32 Arduino
Topic: Question on Serial port with hardware Lib (arduino IDE)
Replies: 5
Views: 564

Re: Question on Serial port with hardware Lib (arduino IDE)

Yes I did with this code long m; void loop() { if (MySerial1.available()) { SERIAL_PRINTDEC(millis()-m); m = millis(); Serial.print(" "); Serial.print(MySerial1.available()); byte x = MySerial1.read(); Serial.print(" "); SERIAL_PRINTHEX(x); Serial.println(); } } here is the result 54 3 11 0 2 12 0 1...
by Aldo_Lodos
Fri Oct 30, 2020 1:09 pm
Forum: ESP32 Arduino
Topic: Question on Serial port with hardware Lib (arduino IDE)
Replies: 5
Views: 564

Question on Serial port with hardware Lib (arduino IDE)

Hello, i'm trying a simple sketch to receive date on a 1200 bauds serial port using the hardware.h library The data sent are a continous serie of 3 bytes espaced by 50 ms of silence My receive process on the ESP32 (TTGO T-Display) is as follow : #include <HardwareSerial.h> #define SERIAL_PRINTHEX(x)...

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