what is ring buffer?

hi, can anyone please tell me about ring buffer implementation?
what is ring buffer?

hi, can anyone please tell me about ring buffer implementation?
Serial port ring buffer proglem??

I use GetChar() and PutChar() functions to read or write to serial port but when write too long streams using PutChar() it stops at "while(txn > 31)" line in PutChar().. I think the interrupt must go...
Serial port ring buffer proglem??

I use GetChar() and PutChar() functions to read or write to serial port but when write too long streams using PutChar() it stops at "while(txn > 31)" line in PutChar().. I think the interrupt must go...
Using a ring buffer to transmit

Using a LPC2400/LPC17xx family of microcontrollers, if I use a TX ring buffer, I think there is a risk of the THRE interrupt to come so quickly that the hardware TX buffer is emptied before any task...