Make serial port configurable.

This change makes the choice of serial port configurable so that
wireless capability can be easily added by connecting Bluetooth modules
(such as BlueSmirf or JY-MCU) to the expansion port pins.
This commit is contained in:
Robert F-C 2012-11-05 21:34:27 +11:00
parent a7e40b2903
commit ab9d183024
3 changed files with 69 additions and 30 deletions

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@ -331,6 +331,13 @@ const bool Z_ENDSTOPS_INVERTING = true; // set to true to invert the logic of th
// SF send wrong arc g-codes when using Arc Point as fillet procedure // SF send wrong arc g-codes when using Arc Point as fillet procedure
//#define SF_ARC_FIX //#define SF_ARC_FIX
// SERIAL_PORT selects which serial port should be used for communication with the host.
// This allows the use of wireless adapters (for instance) which are connected to
// non-default serial port pins.
#define SERIAL_PORT 2
#include "Configuration_adv.h" #include "Configuration_adv.h"
#include "thermistortables.h" #include "thermistortables.h"

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

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@ -23,6 +23,44 @@
#define MarlinSerial_h #define MarlinSerial_h
#include "Marlin.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 DEC 10
#define HEX 16 #define HEX 16
@ -46,7 +84,7 @@ struct ring_buffer
int tail; int tail;
}; };
#if defined(UBRRH) || defined(UBRR0H) #if UART_PRESENT(SERIAL_PORT)
extern ring_buffer rx_buffer; extern ring_buffer rx_buffer;
#endif #endif
@ -68,17 +106,17 @@ class MarlinSerial //: public Stream
FORCE_INLINE void write(uint8_t c) 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) FORCE_INLINE void checkRx(void)
{ {
if((UCSR0A & (1<<RXC0)) != 0) { if((M_UCSRxA & (1<<M_RXCx)) != 0) {
unsigned char c = UDR0; unsigned char c = M_UDRx;
int i = (unsigned int)(rx_buffer.head + 1) % RX_BUFFER_SIZE; int i = (unsigned int)(rx_buffer.head + 1) % RX_BUFFER_SIZE;
// if we should be storing the received character into the location // if we should be storing the received character into the location