Avr/MarklinController
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

make serial tx interrupt based

Browse Source
This commit is contained in:
uvos
2022-03-10 22:20:37 +01:00
parent f49d052e6e
commit 3da07a3b45
1 changed files with 46 additions and 14 deletions
Download Patch File Download Diff File Expand all files Collapse all files

56
serial.cpp
View File

@ -1,18 +1,27 @@
#include "serial.h"
#include "ringbuffer.h"
volatile RingBuffer<SERIAL_BUFFER_SIZE, volatile uint8_t> rxBuffer;
bool stopped = false;
ISR(USART_RX_vect) //I have seen worse interrupt sintax
{
rxBuffer.write(UDR0);
if(serialFlowControl && !stopped && rxBuffer.remainingCapacity() < 32)
Serial* serial = Serial::getInstance();
serial->rxBuffer.write(UDR0);
if(serialFlowControl && !serial->stopped && serial->rxBuffer.remainingCapacity() < 32)
{
loop_until_bit_is_set(UCSR0A, UDRE0);
UDR0 = 0x13;
stopped = true;
serial->stopped = true;
}
}
ISR(USART_TX_vect)
{
Serial* serial = Serial::getInstance();
if(!serial->txBuffer.isEmpty())
{
UDR0 = serial->txBuffer.read();
}
else
{
serial->transmitting = false;
}
}
@ -22,15 +31,39 @@ Serial::Serial()
UBRR0L = UBRRL_VALUE;
UCSR0C = _BV(UCSZ01) | _BV(UCSZ00);
UCSR0B = _BV(RXEN0) | _BV(TXEN0); //Enable RX and TX
UCSR0B |= (1 << RXCIE0); //Enable Rx interuppt
UCSR0B |= (1 << RXCIE0) | (1 << TXCIE0); //Enable Rx and TX interuppt
sei();
}
Serial* Serial::getInstance()
{
static Serial serial;
return &serial;
}
void Serial::putChar(const char c)
{
if(SREG & 1 << 7)
{
while(txBuffer.remainingCapacity() < 2 && transmitting);
if(!transmitting)
{
loop_until_bit_is_set(UCSR0A, UDRE0);
transmitting = true;
UDR0 = c;
}
else
{
txBuffer.write(c);
}
}
else
{
loop_until_bit_is_set(UCSR0A, UDRE0);
UDR0 = c;
}
}
void Serial::write(const char* in, const unsigned int length)
{
@ -42,7 +75,7 @@ void Serial::write(const char* in, const unsigned int length)
void Serial::write_p(const char in[])
{
cli();
//cli();
char ch = pgm_read_byte(in);
while (ch != '\0')
{
@ -50,7 +83,7 @@ void Serial::write_p(const char in[])
in++;
ch = pgm_read_byte(in);
}
sei();
//sei();
}
void Serial::write(const char in[])
@ -61,7 +94,6 @@ void Serial::write(const char in[])
}
}
void Serial::write(int32_t in)
{
if(in == 0)