bissen21/Marlin_Firmware
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Make serial port configurable.

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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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42
Marlin/MarlinSerial.cpp
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@ -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);
}