bissen21/Marlin_Firmware
1
0
Fork 0
Code Issues Pull Requests Projects Releases 4 Wiki Activity

Add TX-buffer for MarlinSerial

Browse Source 
Similar to the current Arduino HardwareSerial
but with max. 256 byte buffer-size.

Deactivated by default.

The boards with AT90USB processor (USBCON) already use a TX-buffer.
This commit is contained in:
AnHardt
2016-07-08 17:25:21 +02:00
parent 98d0167a57
commit 4b44a23a36
20 changed files with 280 additions and 48 deletions
Download Patch File Download Diff File Expand all files Collapse all files

72
Marlin/MarlinSerial.h
View File

@ -21,10 +21,12 @@
*/
/**
HardwareSerial.h - Hardware serial library for Wiring
MarlinSerial.h - Hardware serial library for Wiring
Copyright (c) 2006 Nicholas Zambetti. All right reserved.
Modified 28 September 2010 by Mark Sproul
Modified 14 February 2016 by Andreas Hardtung (added tx buffer)
*/
#ifndef MarlinSerial_h
@ -61,14 +63,17 @@
#define M_UCSRxB SERIAL_REGNAME(UCSR,SERIAL_PORT,B)
#define M_RXENx SERIAL_REGNAME(RXEN,SERIAL_PORT,)
#define M_TXENx SERIAL_REGNAME(TXEN,SERIAL_PORT,)
#define M_TXCx SERIAL_REGNAME(TXC,SERIAL_PORT,)
#define M_RXCIEx SERIAL_REGNAME(RXCIE,SERIAL_PORT,)
#define M_UDREx SERIAL_REGNAME(UDRE,SERIAL_PORT,)
#define M_UDRIEx SERIAL_REGNAME(UDRIE,SERIAL_PORT,)
#define M_UDRx SERIAL_REGNAME(UDR,SERIAL_PORT,)
#define M_UBRRxH SERIAL_REGNAME(UBRR,SERIAL_PORT,H)
#define M_UBRRxL SERIAL_REGNAME(UBRR,SERIAL_PORT,L)
#define M_RXCx SERIAL_REGNAME(RXC,SERIAL_PORT,)
#define M_USARTx_RX_vect SERIAL_REGNAME(USART,SERIAL_PORT,_RX_vect)
#define M_U2Xx SERIAL_REGNAME(U2X,SERIAL_PORT,)
#define M_USARTx_UDRE_vect SERIAL_REGNAME(USART,SERIAL_PORT,_UDRE_vect)
#define DEC 10
@ -87,18 +92,35 @@
#ifndef RX_BUFFER_SIZE
#define RX_BUFFER_SIZE 128
#endif
#ifndef TX_BUFFER_SIZE
#define TX_BUFFER_SIZE 32
#endif
#if !((RX_BUFFER_SIZE == 256) ||(RX_BUFFER_SIZE == 128) ||(RX_BUFFER_SIZE == 64) ||(RX_BUFFER_SIZE == 32) ||(RX_BUFFER_SIZE == 16) ||(RX_BUFFER_SIZE == 8) ||(RX_BUFFER_SIZE == 4) ||(RX_BUFFER_SIZE == 2))
#error "RX_BUFFER_SIZE has to be a power of 2 and >= 2"
#endif
#if !((TX_BUFFER_SIZE == 256) ||(TX_BUFFER_SIZE == 128) ||(TX_BUFFER_SIZE == 64) ||(TX_BUFFER_SIZE == 32) ||(TX_BUFFER_SIZE == 16) ||(TX_BUFFER_SIZE == 8) ||(TX_BUFFER_SIZE == 4) ||(TX_BUFFER_SIZE == 2) ||(TX_BUFFER_SIZE == 0))
#error TX_BUFFER_SIZE has to be a power of 2 or 0
#endif
struct ring_buffer {
struct ring_buffer_r {
unsigned char buffer[RX_BUFFER_SIZE];
volatile uint8_t head;
volatile uint8_t tail;
};
#if TX_BUFFER_SIZE > 0
struct ring_buffer_t {
unsigned char buffer[TX_BUFFER_SIZE];
volatile uint8_t head;
volatile uint8_t tail;
};
#endif
#if UART_PRESENT(SERIAL_PORT)
extern ring_buffer rx_buffer;
extern ring_buffer_r rx_buffer;
#if TX_BUFFER_SIZE > 0
extern ring_buffer_t tx_buffer;
#endif
#endif
#if ENABLED(EMERGENCY_PARSER)
@ -115,43 +137,13 @@ class MarlinSerial { //: public Stream
int peek(void);
int read(void);
void flush(void);
FORCE_INLINE uint8_t available(void) {
CRITICAL_SECTION_START;
uint8_t h = rx_buffer.head;
uint8_t t = rx_buffer.tail;
CRITICAL_SECTION_END;
return (uint8_t)(RX_BUFFER_SIZE + h - t) & (RX_BUFFER_SIZE - 1);
}
FORCE_INLINE void write(uint8_t c) {
while (!TEST(M_UCSRxA, M_UDREx))
;
M_UDRx = c;
}
FORCE_INLINE void checkRx(void) {
if (TEST(M_UCSRxA, M_RXCx)) {
unsigned char c = M_UDRx;
CRITICAL_SECTION_START;
uint8_t h = rx_buffer.head;
uint8_t i = (uint8_t)(h + 1) & (RX_BUFFER_SIZE - 1);
// if we should be storing the received character into the location
// just before the tail (meaning that the head would advance to the
// current location of the tail), we're about to overflow the buffer
// and so we don't write the character or advance the head.
if (i != rx_buffer.tail) {
rx_buffer.buffer[h] = c;
rx_buffer.head = i;
}
CRITICAL_SECTION_END;
#if ENABLED(EMERGENCY_PARSER)
emergency_parser(c);
#endif
}
}
uint8_t available(void);
void checkRx(void);
void write(uint8_t c);
#if TX_BUFFER_SIZE > 0
uint8_t availableForWrite(void);
void flushTX(void);
#endif
private:
void printNumber(unsigned long, uint8_t);