Access uart registers directly instead of through intermediate addresses in a RAM struct.
Add a platform define to reduce the number of ports supported by the cpu.
This commit is contained in:
David Kopf
parent
aceb36c66b
commit
7ca141b457
@ -28,7 +28,6 @@
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*
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* This file is part of the Contiki operating system.
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*
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* @(#)$Id: rs232.c,v 1.7 2010/10/27 14:51:20 dak664 Exp $
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*/
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#include <stdio.h>
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@ -50,229 +49,339 @@
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#define USART_UCSRC_SEL 0x00
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#endif
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/* Currently only the STK500 platform uses a static RAM buffer for printfs.
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* Others print a character at a time using the gcc string pointer.
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* gcc may not strip the unused buffer, even though it is statically
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* allocated in an unused routine.
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*/
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#ifdef RS232_CONF_PRINTF_BUFFER_LENGTH
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#define RS232_PRINTF_BUFFER_LENGTH RS232_CONF_PRINTF_BUFFER_LENGTH
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#else
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#if CONTIKI_TARGET_STK500
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#define RS232_PRINTF_BUFFER_LENGTH 64
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#endif
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#ifndef ADD_CARRAGE_RETURNS_TO_SERIAL_OUTPUT
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#define ADD_CARRAGE_RETURNS_TO_SERIAL_OUTPUT 1
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#endif
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typedef struct {
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volatile uint8_t * udr;
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volatile uint8_t * ubrrh;
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volatile uint8_t * ubrrl;
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volatile uint8_t * ucsrb;
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volatile uint8_t * ucsrc;
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volatile uint8_t txwait;
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int (* input_handler)(unsigned char);
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} rs232_t;
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/* TX interrupts would allow non-blocking output up to the size of some RAM buffer.
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* Since a RAM buffer is not implemented tx interrupts are superfluous and unwanted
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* because they block debug prints from within interrupt routines
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*/
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#ifdef RS232_CONF_TX_INTERRUPTS
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#define RS232_TX_INTERRUPTS RS232_CONF_TX_INTERRUPTS
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#else
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#define RS232_TX_INTERRUPTS 0
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#endif
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/* Insert a carriage return after a line feed. This is the default. */
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#ifndef ADD_CARRIAGE_RETURN_AFTER_NEWLINE
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#define ADD_CARRIAGE_RETURN_AFTER_NEWLINE 1
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#endif
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/* Reducing NUMPORTS from the default will harmlessly disable usage of those ports */
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/* Two ports take 400 bytes flash and 4 bytes RAM. */
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#ifdef RS232_CONF_NUMPORTS
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#define NUMPORTS RS232_CONF_NUMPORTS
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#endif
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#if defined (__AVR_ATmega128__) || defined(__AVR_ATmega1284P__) || defined(__AVR_ATmega1281__) || defined(__AVR_ATmega128RFA1__)
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static rs232_t rs232_ports[2] = {
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{ // UART0
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&UDR0,
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&UBRR0H,
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&UBRR0L,
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&UCSR0B,
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&UCSR0C,
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0,
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NULL
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},
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#ifndef NUMPORTS
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#define NUMPORTS 2
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#elif NUMPORTS > 2
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#error Only two serial ports are defined for this processor!
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#endif
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#if NUMPORTS > 0
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#define D_UDR0 UDR0
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#define D_UDRE0M (1 << UDRE0)
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#define D_UBRR0H UBRR0H
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#define D_UBRR0L UBRR0L
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#define D_UCSR0A UCSR0A
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#define D_UCSR0B UCSR0B
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#define D_UCSR0C UCSR0C
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#define D_USART0_RX_vect USART0_RX_vect
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#define D_USART0_TX_vect USART0_TX_vect
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#if NUMPORTS > 1
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#define D_UDR1 UDR1
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#define D_UDRE1M (1 << UDRE1)
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#define D_UBRR1H UBRR1H
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#define D_UBRR1L UBRR1L
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#define D_UCSR1A UCSR1A
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#define D_UCSR1B UCSR1B
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#define D_UCSR1C UCSR1C
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#define D_USART1_RX_vect USART1_RX_vect
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#define D_USART1_TX_vect USART1_TX_vect
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#endif
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#endif
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{ // UART1
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&UDR1,
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&UBRR1H,
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&UBRR1L,
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&UCSR1B,
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&UCSR1C,
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0,
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NULL
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}
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};
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#elif defined (__AVR_AT90USB1287__)
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/* Has only UART1, map it to port 0 */
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static rs232_t rs232_ports[1] = {
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{ // UART1
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&UDR1,
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&UBRR1H,
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&UBRR1L,
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&UCSR1B,
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&UCSR1C,
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0,
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NULL
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}
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};
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#elif defined (__AVR_ATmega8__) || defined (__AVR_ATmega8515__) \
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|| defined (__AVR_ATmega16__) || defined (__AVR_ATmega32__)
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static rs232_t rs232_ports[1] = {
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{ // UART0
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&UDR,
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&UBRRH,
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&UBRRL,
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&UCSRB,
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&UCSRC,
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0,
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NULL
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}
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};
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#elif defined (__AVR_ATmega644__) || defined (__AVR_ATmega328P__)
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static rs232_t rs232_ports[1] = {
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{ // UART0
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&UDR0,
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&UBRR0H,
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&UBRR0L,
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&UCSR0B,
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&UCSR0C,
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0,
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NULL
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}
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};
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#ifndef NUMPORTS
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#define NUMPORTS 1
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#elif NUMPORTS > 1
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#error Only one serial port is defined for this processor!
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#endif
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#if NUMPORTS > 0
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#define D_UDR0 UDR1
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#define D_UDRE0M (1 << UDRE1)
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#define D_UBRR0H UBRR1H
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#define D_UBRR0L UBRR1L
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#define D_UCSR0A UCSR1A
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#define D_UCSR0B UCSR1B
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#define D_UCSR0C UCSR1C
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#define D_USART0_RX_vect USART1_RX_vect
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#define D_USART0_TX_vect USART1_TX_vect
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#endif
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#elif defined (__AVR_ATmega8515__)
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#ifndef NUMPORTS
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#define NUMPORTS 1
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#elif NUMPORTS > 1
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#error Only one serial port is defined for this processor!
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#endif
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#if NUMPORTS > 0
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#define D_UDR0 UDR
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#define D_UDRE0M (1 << UDRE)
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#define D_UBRR0H UBRRH
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#define D_UBRR0L UBRRL
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#define D_UCSR0A UCSRA
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#define D_UCSR0B UCSRB
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#define D_UCSR0C UCSRC
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#define D_USART0_RX_vect USART_RX_vect
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#define D_USART0_TX_vect USART_TX_vect
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#endif
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#elif defined (__AVR_ATmega328P__)
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#ifndef NUMPORTS
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#define NUMPORTS 1
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#elif NUMPORTS > 1
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#error Only one serial port is defined for this processor!
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#endif
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#if NUMPORTS > 0
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#define D_UDR0 UDR0
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#define D_UDRE0M (1 << UDRE0)
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#define D_UBRR0H UBRR0H
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#define D_UBRR0L UBRR0L
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#define D_UCSR0A UCSR0A
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#define D_UCSR0B UCSR0B
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#define D_UCSR0C UCSR0C
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#define D_USART0_RX_vect USART_RX_vect
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#define D_USART0_TX_vect USART_TX_vect
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#endif
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#elif defined (__AVR_ATmega8__) || defined (__AVR_ATmega16__) || defined (__AVR_ATmega32__)
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#ifndef NUMPORTS
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#define NUMPORTS 1
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#elif NUMPORTS > 1
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#error Only one serial port is defined for this processor!
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#endif
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#if NUMPORTS > 0
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#define D_UDR0 UDR
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#define D_UDRE0M (1 << UDRE)
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#define D_UBRR0H UBRRH
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#define D_UBRR0L UBRRL
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#define D_UCSR0A UCSRA
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#define D_UCSR0B UCSRB
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#define D_UCSR0C UCSRC
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#define D_USART0_RX_vect USART_RXC_vect
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#define D_USART0_TX_vect USART_TXC_vect
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#endif
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#elif defined (__AVR_ATmega644__)
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#ifndef NUMPORTS
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#define NUMPORTS 1
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#elif NUMPORTS > 1
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#error Only one serial port is defined for this processor!
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#endif
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#if NUMPORTS > 0
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#define D_UDR0 UDR0
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#define D_UDRE0M (1 << UDRE0)
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#define D_UBRR0H UBRR0H
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#define D_UBRR0L UBRR0L
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#define D_UCSR0A UCSR0A
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#define D_UCSR0B UCSR0B
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#define D_UCSR0C UCSR0C
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#define D_USART0_RX_vect USART0_RX_vect
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#define D_USART0_TX_vect USART0_TX_vect
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#endif
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#else
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#error Please define the UART registers for your MCU!
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#endif
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#if defined (__AVR_ATmega128__) || defined(__AVR_ATmega1284P__) || defined(__AVR_ATmega1281__) || defined(__AVR_ATmega128RFA1__)
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/*---------------------------------------------------------------------------*/
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ISR(USART0_TX_vect)
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{
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rs232_ports[RS232_PORT_0].txwait = 0;
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}
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/*---------------------------------------------------------------------------*/
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ISR(USART0_RX_vect)
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#if NUMPORTS > 0
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int (* input_handler_0)(unsigned char);
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ISR(D_USART0_RX_vect)
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{
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unsigned char c;
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c = *(rs232_ports[RS232_PORT_0].udr);
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if(rs232_ports[RS232_PORT_0].input_handler != NULL) {
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rs232_ports[RS232_PORT_0].input_handler(c);
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}
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c = D_UDR0;
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if (input_handler_0 != NULL) input_handler_0(c);
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}
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/*---------------------------------------------------------------------------*/
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ISR(USART1_TX_vect)
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#if RS232_TX_INTERRUPTS
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volatile uint8_t txwait_0;
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ISR(D_USART0_TX_vect)
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{
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rs232_ports[RS232_PORT_1].txwait = 0;
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txwait_0 = 0;
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}
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/*---------------------------------------------------------------------------*/
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ISR(USART1_RX_vect)
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{
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unsigned char c;
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c = *(rs232_ports[RS232_PORT_1].udr);
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if(rs232_ports[RS232_PORT_1].input_handler != NULL) {
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rs232_ports[RS232_PORT_1].input_handler(c);
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}
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}
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#elif defined (__AVR_ATmega644__)
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/*---------------------------------------------------------------------------*/
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ISR(USART0_TX_vect)
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{
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rs232_ports[RS232_PORT_0].txwait = 0;
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}
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/*---------------------------------------------------------------------------*/
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ISR(USART0_RX_vect)
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{
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unsigned char c;
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c = *(rs232_ports[RS232_PORT_0].udr);
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if(rs232_ports[RS232_PORT_0].input_handler != NULL) {
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rs232_ports[RS232_PORT_0].input_handler(c);
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}
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}
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#elif defined (__AVR_ATmega8__) || defined (__AVR_ATmega16__) || defined (__AVR_ATmega32__)
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/*---------------------------------------------------------------------------*/
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ISR(USART_TXC_vect)
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{
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rs232_ports[RS232_PORT_0].txwait = 0;
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}
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/*---------------------------------------------------------------------------*/
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ISR(USART_RXC_vect)
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{
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unsigned char c;
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c = *(rs232_ports[RS232_PORT_0].udr);
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if(rs232_ports[RS232_PORT_0].input_handler != NULL) {
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rs232_ports[RS232_PORT_0].input_handler(c);
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}
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}
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#elif defined (__AVR_ATmega8515__) || defined (__AVR_ATmega328P__)
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/*---------------------------------------------------------------------------*/
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ISR(USART_TX_vect)
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{
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rs232_ports[RS232_PORT_0].txwait = 0;
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}
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/*---------------------------------------------------------------------------*/
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ISR(USART_RX_vect)
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{
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unsigned char c;
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c = *(rs232_ports[RS232_PORT_0].udr);
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if(rs232_ports[RS232_PORT_0].input_handler != NULL) {
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rs232_ports[RS232_PORT_0].input_handler(c);
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}
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}
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#elif defined (__AVR_AT90USB1287__)
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/*---------------------------------------------------------------------*/
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ISR(USART1_TX_vect)
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{
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rs232_ports[RS232_PORT_0].txwait = 0;
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}
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/*---------------------------------------------------------------------------*/
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ISR(USART1_RX_vect)
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{
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unsigned char c;
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c = *(rs232_ports[RS232_PORT_0].udr);
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if(rs232_ports[RS232_PORT_0].input_handler != NULL) {
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rs232_ports[RS232_PORT_0].input_handler(c);
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}
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}
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#else
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#error Please define the interrupt vectors for your MCU!
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#endif
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#if NUMPORTS > 1
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int (* input_handler_1)(unsigned char);
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ISR(D_USART1_RX_vect)
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{
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unsigned char c;
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c = D_UDR1;
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if (input_handler_1 != NULL) input_handler_1(c);
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}
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#if RS232_TX_INTERRUPTS
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volatile uint8_t txwait_1;
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ISR(USART1_TX_vect)
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{
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txwait_1 = 0;
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}
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#endif
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#if NUMPORTS > 2
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int (* input_handler_2)(unsigned char);
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ISR(D_USART2_RX_vect)
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{
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unsigned char c;
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c = D_UDR2;
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if (input_handler_2 != NULL) input_handler_2(c);
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}
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#if RS232_TX_INTERRUPTS
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volatile uint8_t txwait_2;
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ISR(USART2_TX_vect)
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{
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txwait_2= 0;
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}
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#endif
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#endif
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#endif
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#endif
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/*---------------------------------------------------------------------------*/
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void
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rs232_init (uint8_t port, uint8_t bd, uint8_t ffmt)
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{
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*(rs232_ports[port].ubrrh) = (uint8_t)(bd>>8);
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*(rs232_ports[port].ubrrl) = (uint8_t)bd;
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#if NUMPORTS > 0
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if (port == 0) {
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D_UBRR0H = (uint8_t)(bd>>8);
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D_UBRR0L = (uint8_t)bd;
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#if RS232_TX_INTERRUPTS
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txwait_0 = 0;
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D_UCSR0B = USART_INTERRUPT_RX_COMPLETE | USART_INTERRUPT_TX_COMPLETE | \
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USART_RECEIVER_ENABLE | USART_TRANSMITTER_ENABLE;
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#else
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D_UCSR0B = USART_INTERRUPT_RX_COMPLETE | \
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USART_RECEIVER_ENABLE | USART_TRANSMITTER_ENABLE;
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#endif
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D_UCSR0C = USART_UCSRC_SEL | ffmt;
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input_handler_0 = NULL;
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/*
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* - Enable receiver and transmitter,
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* - Enable interrupts for receiver and transmitter
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*/
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*(rs232_ports[port].ucsrb) = USART_INTERRUPT_RX_COMPLETE | USART_INTERRUPT_TX_COMPLETE | \
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USART_RECEIVER_ENABLE | USART_TRANSMITTER_ENABLE;
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#if NUMPORTS > 1
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} else if (port == 1) {
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D_UBRR1H = (uint8_t)(bd>>8);
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D_UBRR1L = (uint8_t)bd;
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#if RS232_TX_INTERRUPTS
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txwait_1 = 0;
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D_UCSR1B = USART_INTERRUPT_RX_COMPLETE | USART_INTERRUPT_TX_COMPLETE | \
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USART_RECEIVER_ENABLE | USART_TRANSMITTER_ENABLE;
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#else
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D_UCSR1B = USART_INTERRUPT_RX_COMPLETE | \
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USART_RECEIVER_ENABLE | USART_TRANSMITTER_ENABLE;
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#endif
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D_UCSR1C = USART_UCSRC_SEL | ffmt;
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input_handler_1 = NULL;
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/*
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* - mode (sync. / async)
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* - Parity
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* - Stop bits
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* - charater size (9 bits are currently not supported)
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* - clock polarity
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*/
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*(rs232_ports[port].ucsrc) = USART_UCSRC_SEL | ffmt;
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#if NUMPORTS > 2
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} else if (port == 2) {
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D_UBRR2H = (uint8_t)(bd>>8);
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D_UBRR2L = (uint8_t)bd;
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#if RS232_TX_INTERRUPTS
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txwait_2 = 0;
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D_UCSR2B = USART_INTERRUPT_RX_COMPLETE | USART_INTERRUPT_TX_COMPLETE | \
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USART_RECEIVER_ENABLE | USART_TRANSMITTER_ENABLE;
|
||||
#else
|
||||
D_UCSR2B = USART_INTERRUPT_RX_COMPLETE | \
|
||||
USART_RECEIVER_ENABLE | USART_TRANSMITTER_ENABLE;
|
||||
#endif
|
||||
D_UCSR2C = USART_UCSRC_SEL | ffmt;
|
||||
input_handler_2 = NULL;
|
||||
#endif
|
||||
#endif
|
||||
}
|
||||
#endif /* NUMPORTS > 0 */
|
||||
}
|
||||
|
||||
rs232_ports[port].txwait = 0;
|
||||
|
||||
rs232_ports[port].input_handler = NULL;
|
||||
/*---------------------------------------------------------------------------*/
|
||||
void
|
||||
rs232_send(uint8_t port, unsigned char c)
|
||||
{
|
||||
#if RS232_TX_INTERRUPTS
|
||||
/* Output character and block until it is transmitted */
|
||||
#if NUMPORTS > 0
|
||||
if (port == 0 ) {
|
||||
txwait_0 = 1;
|
||||
D_UDR0 = c;
|
||||
while (txwait_0);
|
||||
#if NUMPORTS > 1
|
||||
} else if (port == 1) {
|
||||
txwait_1 = 1;
|
||||
D_UDR1 = c;
|
||||
while (txwait_1);
|
||||
#if NUMPORTS > 2
|
||||
} else if (port == 2) {
|
||||
txwait_2 = 1;
|
||||
D_UDR2 = c;
|
||||
while (txwait_2);
|
||||
#endif
|
||||
#endif
|
||||
}
|
||||
#endif
|
||||
#else /* RS232_TX_INTERRUPTS */
|
||||
/* Block until tx ready and output character */
|
||||
#if NUMPORTS > 0
|
||||
if (port == 0 ) {
|
||||
while (!(D_UCSR0A & D_UDRE0M));
|
||||
D_UDR0 = c;
|
||||
#if NUMPORTS > 1
|
||||
} else if (port == 1) {
|
||||
while (!(D_UCSR1A & D_UDRE1M));
|
||||
D_UDR1 = c;
|
||||
#if NUMPORTS > 2
|
||||
} else if (port == 2) {
|
||||
while (!(D_UCSR2A & D_UDRE2M));
|
||||
D_UDR2 = c;
|
||||
#endif
|
||||
#endif
|
||||
}
|
||||
#endif
|
||||
#endif /* RS232_TX_INTERRUPTS */
|
||||
}
|
||||
/*---------------------------------------------------------------------------*/
|
||||
void
|
||||
rs232_set_input(uint8_t port, int (*f)(unsigned char))
|
||||
{
|
||||
#if NUMPORTS > 0
|
||||
if (port == 0) {
|
||||
input_handler_0 = f;
|
||||
#if NUMPORTS > 1
|
||||
} else if (port == 1) {
|
||||
input_handler_1 = f;
|
||||
#if NUMPORTS > 2
|
||||
} else if (port == 2) {
|
||||
input_handler_2 = f;
|
||||
#endif
|
||||
#endif
|
||||
}
|
||||
#endif
|
||||
}
|
||||
|
||||
void
|
||||
@ -288,7 +397,7 @@ void
|
||||
rs232_print(uint8_t port, char *buf)
|
||||
{
|
||||
while(*buf) {
|
||||
#if ADD_CARRAGE_RETURNS_TO_SERIAL_OUTPUT
|
||||
#if ADD_CARRIAGE_RETURN_AFTER_NEWLINE
|
||||
if(*buf=='\n') rs232_send(port, '\r');
|
||||
if(*buf=='\r') buf++; else rs232_send(port, *buf++);
|
||||
#else
|
||||
@ -296,6 +405,8 @@ rs232_print(uint8_t port, char *buf)
|
||||
#endif
|
||||
}
|
||||
}
|
||||
|
||||
#if RS232_PRINTF_BUFFER_LENGTH
|
||||
/*---------------------------------------------------------------------------*/
|
||||
void
|
||||
rs232_printf(uint8_t port, const char *fmt, ...)
|
||||
@ -309,20 +420,7 @@ rs232_printf(uint8_t port, const char *fmt, ...)
|
||||
|
||||
rs232_print (port, buf);
|
||||
}
|
||||
/*---------------------------------------------------------------------------*/
|
||||
void
|
||||
rs232_send(uint8_t port, unsigned char c)
|
||||
{
|
||||
rs232_ports[port].txwait = 1;
|
||||
*(rs232_ports[port].udr) = c;
|
||||
while(rs232_ports[port].txwait);
|
||||
}
|
||||
/*---------------------------------------------------------------------------*/
|
||||
void
|
||||
rs232_set_input(uint8_t port, int (*f)(unsigned char))
|
||||
{
|
||||
rs232_ports[port].input_handler = f;
|
||||
}
|
||||
#endif
|
||||
/*---------------------------------------------------------------------------*/
|
||||
void
|
||||
slip_arch_writeb(unsigned char c)
|
||||
@ -338,7 +436,7 @@ static FILE rs232_stdout = FDEV_SETUP_STREAM(rs232_stdout_putchar,
|
||||
|
||||
int rs232_stdout_putchar(char c, FILE *stream)
|
||||
{
|
||||
#if ADD_CARRAGE_RETURNS_TO_SERIAL_OUTPUT
|
||||
#if ADD_CARRIAGE_RETURN_AFTER_NEWLINE
|
||||
if(c=='\n') rs232_send(stdout_rs232_port, '\r');
|
||||
if(c!='\r') rs232_send (stdout_rs232_port, c);
|
||||
#else
|
||||
|
||||
Loading…
Reference in New Issue
Block a user