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Merge pull request #289 from buildrob/Marlin_v1

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Marlin v1 configurable serial port
This commit is contained in:
daid 2012-11-06 01:00:50 -08:00
parent a7e40b2903 65c9a0728f
commit 2f20df3f55
3 changed files with 67 additions and 30 deletions
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5
Marlin/Configuration.h
View file

@ -11,6 +11,11 @@
#define STRING_VERSION_CONFIG_H "2012-05-02" //Personal revision number for changes to THIS file.
#define STRING_CONFIG_H_AUTHOR "erik" //Who made the changes.
// SERIAL_PORT selects which serial port should be used for communication with the host.
// This allows the connection of wireless adapters (for instance) to non-default port pins.
// Serial port 0 is still used by the Arduino bootloader regardless of this setting.
#define SERIAL_PORT 0
// This determines the communication speed of the printer
#define BAUDRATE 250000
//#define BAUDRATE 115200

42
Marlin/MarlinSerial.cpp
View file

@ -28,7 +28,7 @@
// this is so I can support Attiny series and any other chip without a uart
#if defined(UBRRH) || defined(UBRR0H) || defined(UBRR1H) || defined(UBRR2H) || defined(UBRR3H)
#if defined(UBRRH) || defined(UBRR0H)
#if UART_PRESENT(SERIAL_PORT)
ring_buffer rx_buffer = { { 0 }, 0, 0 };
#endif
@ -48,18 +48,12 @@ FORCE_INLINE void store_char(unsigned char c)
//#elif defined(SIG_USART_RECV)
#if defined(USART0_RX_vect)
#if defined(M_USARTx_RX_vect)
// fixed by Mark Sproul this is on the 644/644p
//SIGNAL(SIG_USART_RECV)
SIGNAL(USART0_RX_vect)
SIGNAL(M_USARTx_RX_vect)
{
#if defined(UDR0)
unsigned char c = UDR0;
#elif defined(UDR)
unsigned char c = UDR; // atmega8, atmega32
#else
#error UDR not defined
#endif
unsigned char c = M_UDRx;
store_char(c);
}
#endif
@ -76,39 +70,39 @@ MarlinSerial::MarlinSerial()
void MarlinSerial::begin(long baud)
{
uint16_t baud_setting;
bool useU2X0 = true;
bool useU2X = true;
#if F_CPU == 16000000UL
#if F_CPU == 16000000UL && SERIAL_PORT == 0
// hardcoded exception for compatibility with the bootloader shipped
// with the Duemilanove and previous boards and the firmware on the 8U2
// on the Uno and Mega 2560.
if (baud == 57600) {
useU2X0 = false;
useU2X = false;
}
#endif
if (useU2X0) {
UCSR0A = 1 << U2X0;
if (useU2X) {
M_UCSRxA = 1 << M_U2Xx;
baud_setting = (F_CPU / 4 / baud - 1) / 2;
} else {
UCSR0A = 0;
M_UCSRxA = 0;
baud_setting = (F_CPU / 8 / baud - 1) / 2;
}
// assign the baud_setting, a.k.a. ubbr (USART Baud Rate Register)
UBRR0H = baud_setting >> 8;
UBRR0L = baud_setting;
M_UBRRxH = baud_setting >> 8;
M_UBRRxL = baud_setting;
sbi(UCSR0B, RXEN0);
sbi(UCSR0B, TXEN0);
sbi(UCSR0B, RXCIE0);
sbi(M_UCSRxB, M_RXENx);
sbi(M_UCSRxB, M_TXENx);
sbi(M_UCSRxB, M_RXCIEx);
}
void MarlinSerial::end()
{
cbi(UCSR0B, RXEN0);
cbi(UCSR0B, TXEN0);
cbi(UCSR0B, RXCIE0);
cbi(M_UCSRxB, M_RXENx);
cbi(M_UCSRxB, M_TXENx);
cbi(M_UCSRxB, M_RXCIEx);
}

50
Marlin/MarlinSerial.h
View file

@ -23,6 +23,44 @@
#define MarlinSerial_h
#include "Marlin.h"
#if !defined(SERIAL_PORT)
#error SERIAL_PORT not set
#endif
// The presence of the UBRRH register is used to detect a UART.
#define UART_PRESENT(port) ((port == 0 && (defined(UBRRH) || defined(UBRR0H))) || \
(port == 1 && defined(UBRR1H)) || (port == 2 && defined(UBRR2H)) || \
(port == 3 && defined(UBRR3H)))
// These are macros to build serial port register names for the selected SERIAL_PORT (C preprocessor
// requires two levels of indirection to expand macro values properly)
#define SERIAL_REGNAME(registerbase,number,suffix) SERIAL_REGNAME_INTERNAL(registerbase,number,suffix)
#define SERIAL_REGNAME_INTERNAL(registerbase,number,suffix) registerbase##number##suffix
// Registers used by MarlinSerial class (these are expanded
// depending on selected serial port
#define M_UCSRxA SERIAL_REGNAME(UCSR,SERIAL_PORT,A) // defines M_UCSRxA to be UCSRxA where x is the serial port number
#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_RXCIEx SERIAL_REGNAME(RXCIE,SERIAL_PORT,)
#define M_UDREx SERIAL_REGNAME(UDRE,SERIAL_PORT,)
#if SERIAL_PORT == 0 && !defined(UDR0)
#if defined(UDR)
#define M_UDRx UDR // atmega8, atmega32
#else
#error UDR not defined
#endif
#else
#define M_UDRx SERIAL_REGNAME(UDR,SERIAL_PORT,)
#endif
#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 DEC 10
#define HEX 16
@ -46,7 +84,7 @@ struct ring_buffer
int tail;
};
#if defined(UBRRH) || defined(UBRR0H)
#if UART_PRESENT(SERIAL_PORT)
extern ring_buffer rx_buffer;
#endif
@ -68,17 +106,17 @@ class MarlinSerial //: public Stream
FORCE_INLINE void write(uint8_t c)
{
while (!((UCSR0A) & (1 << UDRE0)))
while (!((M_UCSRxA) & (1 << M_UDREx)))
;
UDR0 = c;
M_UDRx = c;
}
FORCE_INLINE void checkRx(void)
{
if((UCSR0A & (1<<RXC0)) != 0) {
unsigned char c = UDR0;
if((M_UCSRxA & (1<<M_RXCx)) != 0) {
unsigned char c = M_UDRx;
int i = (unsigned int)(rx_buffer.head + 1) % RX_BUFFER_SIZE;
// if we should be storing the received character into the location
@ -147,4 +185,4 @@ class MarlinSerial //: public Stream
extern MarlinSerial MSerial;
#endif // ! teensylu
#endif
#endif