X-Git-Url: https://codewiz.org/gitweb?a=blobdiff_plain;f=bertos%2Fcpu%2Favr%2Fdrv%2Fser_avr.c;h=f87f3b0b4e33a29815fbb1877be2a8bd6014d58d;hb=4635e332d9a489cb54a25b1bf37559c84181db74;hp=746bb5270feb6a88eaed545839537975ee4926fe;hpb=6ad5c01d9a3d323e34a547283e7a534f7c3b9d15;p=bertos.git diff --git a/bertos/cpu/avr/drv/ser_avr.c b/bertos/cpu/avr/drv/ser_avr.c index 746bb527..f87f3b0b 100644 --- a/bertos/cpu/avr/drv/ser_avr.c +++ b/bertos/cpu/avr/drv/ser_avr.c @@ -26,893 +26,31 @@ * invalidate any other reasons why the executable file might be covered by * the GNU General Public License. * - * Copyright 2003, 2004 Develer S.r.l. (http://www.develer.com/) + * Copyright 2003, 2004, 2010 Develer S.r.l. (http://www.develer.com/) * Copyright 2000 Bernie Innocenti * * --> * * \brief AVR UART and SPI I/O driver (Implementation) * - * \version $Id$ + * \author Onno * - * \author Bernie Innocenti - * \author Stefano Fedrigo + * This module is automatically included so no need to include + * in test list. + * notest: avr */ -#include "hw/hw_ser.h" /* Required for bus macros overrides */ -#include /* CPU_FREQ */ +#ifndef WIZ_AUTOGEN + #warning This file is deprecated, you should probably use ser_mega.c -#include "cfg/cfg_ser.h" + #include -#include /* DIV_ROUND */ -#include -#include // ARCH_NIGHTTEST - -#include -#include -#include - -#include - -#include - -#if defined(__AVR_LIBC_VERSION__) && (__AVR_LIBC_VERSION__ >= 10400UL) - #include -#else - #include -#endif - - -#if !CONFIG_SER_HWHANDSHAKE - /** - * \name Hardware handshake (RTS/CTS). - * \{ - */ - #define RTS_ON do {} while (0) - #define RTS_OFF do {} while (0) - #define IS_CTS_ON true - #define EIMSKF_CTS 0 /**< Dummy value, must be overridden */ - /*\}*/ -#endif - -#if CPU_AVR_ATMEGA1281 - #define BIT_RXCIE0 RXCIE0 - #define BIT_RXEN0 RXEN0 - #define BIT_TXEN0 TXEN0 - #define BIT_UDRIE0 UDRIE0 - - #define BIT_RXCIE1 RXCIE1 - #define BIT_RXEN1 RXEN1 - #define BIT_TXEN1 TXEN1 - #define BIT_UDRIE1 UDRIE1 -#else - #define BIT_RXCIE0 RXCIE - #define BIT_RXEN0 RXEN - #define BIT_TXEN0 TXEN - #define BIT_UDRIE0 UDRIE - - #define BIT_RXCIE1 RXCIE - #define BIT_RXEN1 RXEN - #define BIT_TXEN1 TXEN - #define BIT_UDRIE1 UDRIE -#endif - - -/** - * \name Overridable serial bus hooks - * - * These can be redefined in hw.h to implement - * special bus policies such as half-duplex, 485, etc. - * - * - * \code - * TXBEGIN TXCHAR TXEND TXOFF - * | __________|__________ | | - * | | | | | | | | | - * v v v v v v v v v - * ______ __ __ __ __ __ __ ________________ - * \/ \/ \/ \/ \/ \/ \/ - * ______/\__/\__/\__/\__/\__/\__/ - * - * \endcode - * - * \{ - */ -#ifndef SER_UART0_BUS_TXINIT - /** - * Default TXINIT macro - invoked in uart0_init() - * - * - Enable both the receiver and the transmitter - * - Enable only the RX complete interrupt - */ - #define SER_UART0_BUS_TXINIT do { \ - UCSR0B = BV(BIT_RXCIE0) | BV(BIT_RXEN0) | BV(BIT_TXEN0); \ - } while (0) -#endif - -#ifndef SER_UART0_BUS_TXBEGIN - /** - * Invoked before starting a transmission - * - * - Enable both the receiver and the transmitter - * - Enable both the RX complete and UDR empty interrupts - */ - #define SER_UART0_BUS_TXBEGIN do { \ - UCSR0B = BV(BIT_RXCIE0) | BV(BIT_UDRIE0) | BV(BIT_RXEN0) | BV(BIT_TXEN0); \ - } while (0) -#endif - -#ifndef SER_UART0_BUS_TXCHAR - /** - * Invoked to send one character. - */ - #define SER_UART0_BUS_TXCHAR(c) do { \ - UDR0 = (c); \ - } while (0) -#endif - -#ifndef SER_UART0_BUS_TXEND - /** - * Invoked as soon as the txfifo becomes empty - * - * - Keep both the receiver and the transmitter enabled - * - Keep the RX complete interrupt enabled - * - Disable the UDR empty interrupt - */ - #define SER_UART0_BUS_TXEND do { \ - UCSR0B = BV(BIT_RXCIE0) | BV(BIT_RXEN0) | BV(BIT_TXEN0); \ - } while (0) -#endif - -#ifndef SER_UART0_BUS_TXOFF - /** - * \def SER_UART0_BUS_TXOFF - * - * Invoked after the last character has been transmitted - * - * The default is no action. - */ - #ifdef __doxygen__ - #define SER_UART0_BUS_TXOFF - #endif -#endif - -#ifndef SER_UART1_BUS_TXINIT - /** \sa SER_UART0_BUS_TXINIT */ - #define SER_UART1_BUS_TXINIT do { \ - UCSR1B = BV(BIT_RXCIE1) | BV(BIT_RXEN1) | BV(BIT_TXEN1); \ - } while (0) -#endif -#ifndef SER_UART1_BUS_TXBEGIN - /** \sa SER_UART0_BUS_TXBEGIN */ - #define SER_UART1_BUS_TXBEGIN do { \ - UCSR1B = BV(BIT_RXCIE1) | BV(BIT_UDRIE1) | BV(BIT_RXEN1) | BV(BIT_TXEN1); \ - } while (0) -#endif -#ifndef SER_UART1_BUS_TXCHAR - /** \sa SER_UART0_BUS_TXCHAR */ - #define SER_UART1_BUS_TXCHAR(c) do { \ - UDR1 = (c); \ - } while (0) -#endif -#ifndef SER_UART1_BUS_TXEND - /** \sa SER_UART0_BUS_TXEND */ - #define SER_UART1_BUS_TXEND do { \ - UCSR1B = BV(BIT_RXCIE1) | BV(BIT_RXEN1) | BV(BIT_TXEN1); \ - } while (0) -#endif -#ifndef SER_UART1_BUS_TXOFF - /** - * \def SER_UART1_BUS_TXOFF - * - * \see SER_UART0_BUS_TXOFF - */ - #ifdef __doxygen__ - #define SER_UART1_BUS_TXOFF - #endif -#endif -/*\}*/ - - -/** - * \name Overridable SPI hooks - * - * These can be redefined in hw.h to implement - * special bus policies such as slave select pin handling, etc. - * - * \{ - */ -#ifndef SER_SPI_BUS_TXINIT - /** - * Default TXINIT macro - invoked in spi_init() - * The default is no action. - */ - #define SER_SPI_BUS_TXINIT -#endif - -#ifndef SER_SPI_BUS_TXCLOSE - /** - * Invoked after the last character has been transmitted. - * The default is no action. - */ - #define SER_SPI_BUS_TXCLOSE -#endif -/*\}*/ - - -/* SPI port and pin configuration */ -#if CPU_AVR_ATMEGA64 || CPU_AVR_ATMEGA128 || CPU_AVR_ATMEGA103 || CPU_AVR_ATMEGA1281 - #define SPI_PORT PORTB - #define SPI_DDR DDRB - #define SPI_SS_BIT PB0 - #define SPI_SCK_BIT PB1 - #define SPI_MOSI_BIT PB2 - #define SPI_MISO_BIT PB3 -#elif CPU_AVR_ATMEGA8 - #define SPI_PORT PORTB - #define SPI_DDR DDRB - #define SPI_SS_BIT PB2 - #define SPI_SCK_BIT PB5 - #define SPI_MOSI_BIT PB3 - #define SPI_MISO_BIT PB4 -#else - #error Unknown architecture -#endif - -/* USART register definitions */ -#if CPU_AVR_ATMEGA64 || CPU_AVR_ATMEGA128 || CPU_AVR_ATMEGA1281 - #define AVR_HAS_UART1 1 -#elif CPU_AVR_ATMEGA8 - #define AVR_HAS_UART1 0 - #define UCSR0A UCSRA - #define UCSR0B UCSRB - #define UCSR0C UCSRC - #define UDR0 UDR - #define UBRR0L UBRRL - #define UBRR0H UBRRH - #define SIG_UART0_DATA SIG_UART_DATA - #define SIG_UART0_RECV SIG_UART_RECV - #define SIG_UART0_TRANS SIG_UART_TRANS -#elif CPU_AVR_ATMEGA103 - #define AVR_HAS_UART1 0 - #define UCSR0B UCR - #define UDR0 UDR - #define UCSR0A USR - #define UBRR0L UBRR - #define SIG_UART0_DATA SIG_UART_DATA - #define SIG_UART0_RECV SIG_UART_RECV - #define SIG_UART0_TRANS SIG_UART_TRANS -#else - #error Unknown architecture -#endif - - -/* From the high-level serial driver */ -extern struct Serial *ser_handles[SER_CNT]; - -/* TX and RX buffers */ -static unsigned char uart0_txbuffer[CONFIG_UART0_TXBUFSIZE]; -static unsigned char uart0_rxbuffer[CONFIG_UART0_RXBUFSIZE]; -#if AVR_HAS_UART1 - static unsigned char uart1_txbuffer[CONFIG_UART1_TXBUFSIZE]; - static unsigned char uart1_rxbuffer[CONFIG_UART1_RXBUFSIZE]; -#endif -static unsigned char spi_txbuffer[CONFIG_SPI_TXBUFSIZE]; -static unsigned char spi_rxbuffer[CONFIG_SPI_RXBUFSIZE]; - - -/** - * Internal hardware state structure - * - * The \a sending variable is true while the transmission - * interrupt is retriggering itself. - * - * For the USARTs the \a sending flag is useful for taking specific - * actions before sending a burst of data, at the start of a trasmission - * but not before every char sent. - * - * For the SPI, this flag is necessary because the SPI sends and receives - * bytes at the same time and the SPI IRQ is unique for send/receive. - * The only way to start transmission is to write data in SPDR (this - * is done by spi_starttx()). We do this *only* if a transfer is - * not already started. - */ -struct AvrSerial -{ - struct SerialHardware hw; - volatile bool sending; -}; - - - -/* - * Callbacks - */ -static void uart0_init( - UNUSED_ARG(struct SerialHardware *, _hw), - UNUSED_ARG(struct Serial *, ser)) -{ - SER_UART0_BUS_TXINIT; - RTS_ON; - SER_STROBE_INIT; -} - -static void uart0_cleanup(UNUSED_ARG(struct SerialHardware *, _hw)) -{ - UCSR0B = 0; -} - -static void uart0_enabletxirq(struct SerialHardware *_hw) -{ - struct AvrSerial *hw = (struct AvrSerial *)_hw; - - /* - * WARNING: racy code here! The tx interrupt sets hw->sending to false - * when it runs with an empty fifo. The order of statements in the - * if-block matters. - */ - if (!hw->sending) - { - hw->sending = true; - SER_UART0_BUS_TXBEGIN; - } -} - -static void uart0_setbaudrate(UNUSED_ARG(struct SerialHardware *, _hw), unsigned long rate) -{ - /* Compute baud-rate period */ - uint16_t period = DIV_ROUND(CPU_FREQ / 16UL, rate) - 1; - -#if !CPU_AVR_ATMEGA103 - UBRR0H = (period) >> 8; -#endif - UBRR0L = (period); - - //DB(kprintf("uart0_setbaudrate(rate=%lu): period=%d\n", rate, period);) -} - -static void uart0_setparity(UNUSED_ARG(struct SerialHardware *, _hw), int parity) -{ -#if !CPU_AVR_ATMEGA103 - UCSR0C = (UCSR0C & ~(BV(UPM01) | BV(UPM00))) | ((parity) << UPM00); -#endif -} - -#if AVR_HAS_UART1 - -static void uart1_init( - UNUSED_ARG(struct SerialHardware *, _hw), - UNUSED_ARG(struct Serial *, ser)) -{ - SER_UART1_BUS_TXINIT; - RTS_ON; - SER_STROBE_INIT; -} - -static void uart1_cleanup(UNUSED_ARG(struct SerialHardware *, _hw)) -{ - UCSR1B = 0; -} - -static void uart1_enabletxirq(struct SerialHardware *_hw) -{ - struct AvrSerial *hw = (struct AvrSerial *)_hw; - - /* - * WARNING: racy code here! The tx interrupt - * sets hw->sending to false when it runs with - * an empty fifo. The order of the statements - * in the if-block matters. - */ - if (!hw->sending) - { - hw->sending = true; - SER_UART1_BUS_TXBEGIN; - } -} - -static void uart1_setbaudrate(UNUSED_ARG(struct SerialHardware *, _hw), unsigned long rate) -{ - /* Compute baud-rate period */ - uint16_t period = DIV_ROUND(CPU_FREQ / 16UL, rate) - 1; - - UBRR1H = (period) >> 8; - UBRR1L = (period); - - //DB(kprintf("uart1_setbaudrate(rate=%ld): period=%d\n", rate, period);) -} - -static void uart1_setparity(UNUSED_ARG(struct SerialHardware *, _hw), int parity) -{ - UCSR1C = (UCSR1C & ~(BV(UPM11) | BV(UPM10))) | ((parity) << UPM10); -} - -#endif // AVR_HAS_UART1 - -static void spi_init(UNUSED_ARG(struct SerialHardware *, _hw), UNUSED_ARG(struct Serial *, ser)) -{ - /* - * Set MOSI and SCK ports out, MISO in. - * - * The ATmega64/128 datasheet explicitly states that the input/output - * state of the SPI pins is not significant, as when the SPI is - * active the I/O port are overrided. - * This is *blatantly FALSE*. - * - * Moreover, the MISO pin on the board_kc *must* be in high impedance - * state even when the SPI is off, because the line is wired together - * with the KBus serial RX, and the transmitter of the slave boards - * would be unable to drive the line. - */ - ATOMIC(SPI_DDR |= (BV(SPI_MOSI_BIT) | BV(SPI_SCK_BIT))); - - /* - * If the SPI master mode is activated and the SS pin is in input and tied low, - * the SPI hardware will automatically switch to slave mode! - * For proper communication this pins should therefore be: - * - as output - * - as input but tied high forever! - * This driver set the pin as output. - */ - #if !(ARCH & ARCH_NIGHTTEST) - #warning SPI SS pin set as output for proper operation, check schematics for possible conflicts. - #endif - ATOMIC(SPI_DDR |= BV(SPI_SS_BIT)); - - ATOMIC(SPI_DDR &= ~BV(SPI_MISO_BIT)); - /* Enable SPI, IRQ on, Master */ - SPCR = BV(SPE) | BV(SPIE) | BV(MSTR); - - /* Set data order */ - #if CONFIG_SPI_DATA_ORDER == SER_LSB_FIRST - SPCR |= BV(DORD); - #endif - - /* Set SPI clock rate */ - #if CONFIG_SPI_CLOCK_DIV == 128 - SPCR |= (BV(SPR1) | BV(SPR0)); - #elif (CONFIG_SPI_CLOCK_DIV == 64 || CONFIG_SPI_CLOCK_DIV == 32) - SPCR |= BV(SPR1); - #elif (CONFIG_SPI_CLOCK_DIV == 16 || CONFIG_SPI_CLOCK_DIV == 8) - SPCR |= BV(SPR0); - #elif (CONFIG_SPI_CLOCK_DIV == 4 || CONFIG_SPI_CLOCK_DIV == 2) - // SPR0 & SDPR1 both at 0 + #if CPU_AVR_MEGA + #include "ser_mega.c" + #elif CPU_AVR_XMEGA + #include "ser_xmega.c" + /*#elif Add other AVR families here */ #else - #error Unsupported SPI clock division factor. + #error Unknown CPU #endif - - /* Set SPI2X bit (spi double frequency) */ - #if (CONFIG_SPI_CLOCK_DIV == 128 || CONFIG_SPI_CLOCK_DIV == 64 \ - || CONFIG_SPI_CLOCK_DIV == 16 || CONFIG_SPI_CLOCK_DIV == 4) - SPSR &= ~BV(SPI2X); - #elif (CONFIG_SPI_CLOCK_DIV == 32 || CONFIG_SPI_CLOCK_DIV == 8 || CONFIG_SPI_CLOCK_DIV == 2) - SPSR |= BV(SPI2X); - #else - #error Unsupported SPI clock division factor. - #endif - - /* Set clock polarity */ - #if CONFIG_SPI_CLOCK_POL == 1 - SPCR |= BV(CPOL); - #endif - - /* Set clock phase */ - #if CONFIG_SPI_CLOCK_PHASE == 1 - SPCR |= BV(CPHA); - #endif - SER_SPI_BUS_TXINIT; - - SER_STROBE_INIT; -} - -static void spi_cleanup(UNUSED_ARG(struct SerialHardware *, _hw)) -{ - SPCR = 0; - - SER_SPI_BUS_TXCLOSE; - - /* Set all pins as inputs */ - ATOMIC(SPI_DDR &= ~(BV(SPI_MISO_BIT) | BV(SPI_MOSI_BIT) | BV(SPI_SCK_BIT) | BV(SPI_SS_BIT))); -} - -static void spi_starttx(struct SerialHardware *_hw) -{ - struct AvrSerial *hw = (struct AvrSerial *)_hw; - - cpu_flags_t flags; - IRQ_SAVE_DISABLE(flags); - - /* Send data only if the SPI is not already transmitting */ - if (!hw->sending && !fifo_isempty(&ser_handles[SER_SPI]->txfifo)) - { - hw->sending = true; - SPDR = fifo_pop(&ser_handles[SER_SPI]->txfifo); - } - - IRQ_RESTORE(flags); -} - -static void spi_setbaudrate( - UNUSED_ARG(struct SerialHardware *, _hw), - UNUSED_ARG(unsigned long, rate)) -{ - // nop -} - -static void spi_setparity(UNUSED_ARG(struct SerialHardware *, _hw), UNUSED_ARG(int, parity)) -{ - // nop -} - -static bool tx_sending(struct SerialHardware* _hw) -{ - struct AvrSerial *hw = (struct AvrSerial *)_hw; - return hw->sending; -} - - - -// FIXME: move into compiler.h? Ditch? -#if COMPILER_C99 - #define C99INIT(name,val) .name = val -#elif defined(__GNUC__) - #define C99INIT(name,val) name: val -#else - #warning No designated initializers, double check your code - #define C99INIT(name,val) (val) -#endif - -/* - * High-level interface data structures - */ -static const struct SerialHardwareVT UART0_VT = -{ - C99INIT(init, uart0_init), - C99INIT(cleanup, uart0_cleanup), - C99INIT(setBaudrate, uart0_setbaudrate), - C99INIT(setParity, uart0_setparity), - C99INIT(txStart, uart0_enabletxirq), - C99INIT(txSending, tx_sending), -}; - -#if AVR_HAS_UART1 -static const struct SerialHardwareVT UART1_VT = -{ - C99INIT(init, uart1_init), - C99INIT(cleanup, uart1_cleanup), - C99INIT(setBaudrate, uart1_setbaudrate), - C99INIT(setParity, uart1_setparity), - C99INIT(txStart, uart1_enabletxirq), - C99INIT(txSending, tx_sending), -}; -#endif // AVR_HAS_UART1 - -static const struct SerialHardwareVT SPI_VT = -{ - C99INIT(init, spi_init), - C99INIT(cleanup, spi_cleanup), - C99INIT(setBaudrate, spi_setbaudrate), - C99INIT(setParity, spi_setparity), - C99INIT(txStart, spi_starttx), - C99INIT(txSending, tx_sending), -}; - -static struct AvrSerial UARTDescs[SER_CNT] = -{ - { - C99INIT(hw, /**/) { - C99INIT(table, &UART0_VT), - C99INIT(txbuffer, uart0_txbuffer), - C99INIT(rxbuffer, uart0_rxbuffer), - C99INIT(txbuffer_size, sizeof(uart0_txbuffer)), - C99INIT(rxbuffer_size, sizeof(uart0_rxbuffer)), - }, - C99INIT(sending, false), - }, -#if AVR_HAS_UART1 - { - C99INIT(hw, /**/) { - C99INIT(table, &UART1_VT), - C99INIT(txbuffer, uart1_txbuffer), - C99INIT(rxbuffer, uart1_rxbuffer), - C99INIT(txbuffer_size, sizeof(uart1_txbuffer)), - C99INIT(rxbuffer_size, sizeof(uart1_rxbuffer)), - }, - C99INIT(sending, false), - }, -#endif - { - C99INIT(hw, /**/) { - C99INIT(table, &SPI_VT), - C99INIT(txbuffer, spi_txbuffer), - C99INIT(rxbuffer, spi_rxbuffer), - C99INIT(txbuffer_size, sizeof(spi_txbuffer)), - C99INIT(rxbuffer_size, sizeof(spi_rxbuffer)), - }, - C99INIT(sending, false), - } -}; - -struct SerialHardware *ser_hw_getdesc(int unit) -{ - ASSERT(unit < SER_CNT); - return &UARTDescs[unit].hw; -} - - -/* - * Interrupt handlers - */ - -#if CONFIG_SER_HWHANDSHAKE - -/// This interrupt is triggered when the CTS line goes high -SIGNAL(SIG_CTS) -{ - // Re-enable UDR empty interrupt and TX, then disable CTS interrupt - UCSR0B = BV(BIT_RXCIE0) | BV(BIT_UDRIE0) | BV(BIT_RXEN0) | BV(BIT_TXEN0); - EIMSK &= ~EIMSKF_CTS; -} - -#endif // CONFIG_SER_HWHANDSHAKE - - -/** - * Serial 0 TX interrupt handler - */ -SIGNAL(USART0_UDRE_vect) -{ - SER_STROBE_ON; - - struct FIFOBuffer * const txfifo = &ser_handles[SER_UART0]->txfifo; - - if (fifo_isempty(txfifo)) - { - SER_UART0_BUS_TXEND; -#ifndef SER_UART0_BUS_TXOFF - UARTDescs[SER_UART0].sending = false; -#endif - } -#if CPU_AVR_ATMEGA64 || CPU_AVR_ATMEGA128 || CPU_AVR_ATMEGA103 - else if (!IS_CTS_ON) - { - // Disable rx interrupt and tx, enable CTS interrupt - // UNTESTED - UCSR0B = BV(BIT_RXCIE0) | BV(BIT_RXEN0) | BV(BIT_TXEN0); - EIFR |= EIMSKF_CTS; - EIMSK |= EIMSKF_CTS; - } -#endif - else - { - char c = fifo_pop(txfifo); - SER_UART0_BUS_TXCHAR(c); - } - - SER_STROBE_OFF; -} - -#ifdef SER_UART0_BUS_TXOFF -/** - * Serial port 0 TX complete interrupt handler. - * - * This IRQ is usually disabled. The UDR-empty interrupt - * enables it when there's no more data to transmit. - * We need to wait until the last character has been - * transmitted before switching the 485 transceiver to - * receive mode. - * - * The txfifo might have been refilled by putchar() while - * we were waiting for the transmission complete interrupt. - * In this case, we must restart the UDR empty interrupt, - * otherwise we'd stop the serial port with some data - * still pending in the buffer. - */ -SIGNAL(SIG_UART0_TRANS) -{ - SER_STROBE_ON; - - struct FIFOBuffer * const txfifo = &ser_handles[SER_UART0]->txfifo; - if (fifo_isempty(txfifo)) - { - SER_UART0_BUS_TXOFF; - UARTDescs[SER_UART0].sending = false; - } - else - UCSR0B = BV(BIT_RXCIE0) | BV(BIT_UDRIE0) | BV(BIT_RXEN0) | BV(BIT_TXEN0); - - SER_STROBE_OFF; -} -#endif /* SER_UART0_BUS_TXOFF */ - - -#if AVR_HAS_UART1 - -/** - * Serial 1 TX interrupt handler - */ -SIGNAL(USART1_UDRE_vect) -{ - SER_STROBE_ON; - - struct FIFOBuffer * const txfifo = &ser_handles[SER_UART1]->txfifo; - - if (fifo_isempty(txfifo)) - { - SER_UART1_BUS_TXEND; -#ifndef SER_UART1_BUS_TXOFF - UARTDescs[SER_UART1].sending = false; -#endif - } -#if CPU_AVR_ATMEGA64 || CPU_AVR_ATMEGA128 || CPU_AVR_ATMEGA103 - else if (!IS_CTS_ON) - { - // Disable rx interrupt and tx, enable CTS interrupt - // UNTESTED - UCSR1B = BV(BIT_RXCIE1) | BV(BIT_RXEN1) | BV(BIT_TXEN1); - EIFR |= EIMSKF_CTS; - EIMSK |= EIMSKF_CTS; - } -#endif - else - { - char c = fifo_pop(txfifo); - SER_UART1_BUS_TXCHAR(c); - } - - SER_STROBE_OFF; -} - -#ifdef SER_UART1_BUS_TXOFF -/** - * Serial port 1 TX complete interrupt handler. - * - * \sa port 0 TX complete handler. - */ -SIGNAL(USART1_TX_vect) -{ - SER_STROBE_ON; - - struct FIFOBuffer * const txfifo = &ser_handles[SER_UART1]->txfifo; - if (fifo_isempty(txfifo)) - { - SER_UART1_BUS_TXOFF; - UARTDescs[SER_UART1].sending = false; - } - else - UCSR1B = BV(BIT_RXCIE1) | BV(BIT_UDRIE1) | BV(BIT_RXEN1) | BV(BIT_TXEN1); - - SER_STROBE_OFF; -} -#endif /* SER_UART1_BUS_TXOFF */ - -#endif // AVR_HAS_UART1 - - -/** - * Serial 0 RX complete interrupt handler. - * - * This handler is interruptible. - * Interrupt are reenabled as soon as recv complete interrupt is - * disabled. Using INTERRUPT() is troublesome when the serial - * is heavily loaded, because an interrupt could be retriggered - * when executing the handler prologue before RXCIE is disabled. - * - * \note The code that re-enables interrupts is commented out - * because in some nasty cases the interrupt is retriggered. - * This is probably due to the RXC flag being set before - * RXCIE is cleared. Unfortunately the RXC flag is read-only - * and can't be cleared by code. - */ -SIGNAL(USART0_RX_vect) -{ - SER_STROBE_ON; - - /* Disable Recv complete IRQ */ - //UCSR0B &= ~BV(RXCIE); - //IRQ_ENABLE; - - /* Should be read before UDR */ - ser_handles[SER_UART0]->status |= UCSR0A & (SERRF_RXSROVERRUN | SERRF_FRAMEERROR); - - /* To clear the RXC flag we must _always_ read the UDR even when we're - * not going to accept the incoming data, otherwise a new interrupt - * will occur once the handler terminates. - */ - char c = UDR0; - struct FIFOBuffer * const rxfifo = &ser_handles[SER_UART0]->rxfifo; - - if (fifo_isfull(rxfifo)) - ser_handles[SER_UART0]->status |= SERRF_RXFIFOOVERRUN; - else - { - fifo_push(rxfifo, c); -#if CONFIG_SER_HWHANDSHAKE - if (fifo_isfull(rxfifo)) - RTS_OFF; -#endif - } - - /* Reenable receive complete int */ - //IRQ_DISABLE; - //UCSR0B |= BV(RXCIE); - - SER_STROBE_OFF; -} - - -#if AVR_HAS_UART1 - -/** - * Serial 1 RX complete interrupt handler. - * - * This handler is interruptible. - * Interrupt are reenabled as soon as recv complete interrupt is - * disabled. Using INTERRUPT() is troublesome when the serial - * is heavily loaded, because an interrupt could be retriggered - * when executing the handler prologue before RXCIE is disabled. - * - * \see SIGNAL(USART1_RX_vect) - */ -SIGNAL(USART1_RX_vect) -{ - SER_STROBE_ON; - - /* Disable Recv complete IRQ */ - //UCSR1B &= ~BV(RXCIE); - //IRQ_ENABLE; - - /* Should be read before UDR */ - ser_handles[SER_UART1]->status |= UCSR1A & (SERRF_RXSROVERRUN | SERRF_FRAMEERROR); - - /* To avoid an IRQ storm, we must _always_ read the UDR even when we're - * not going to accept the incoming data - */ - char c = UDR1; - struct FIFOBuffer * const rxfifo = &ser_handles[SER_UART1]->rxfifo; - //ASSERT_VALID_FIFO(rxfifo); - - if (UNLIKELY(fifo_isfull(rxfifo))) - ser_handles[SER_UART1]->status |= SERRF_RXFIFOOVERRUN; - else - { - fifo_push(rxfifo, c); -#if CONFIG_SER_HWHANDSHAKE - if (fifo_isfull(rxfifo)) - RTS_OFF; -#endif - } - /* Re-enable receive complete int */ - //IRQ_DISABLE; - //UCSR1B |= BV(RXCIE); - - SER_STROBE_OFF; -} - -#endif // AVR_HAS_UART1 - - -/** - * SPI interrupt handler - */ -SIGNAL(SIG_SPI) -{ - SER_STROBE_ON; - - /* Read incoming byte. */ - if (!fifo_isfull(&ser_handles[SER_SPI]->rxfifo)) - fifo_push(&ser_handles[SER_SPI]->rxfifo, SPDR); - /* - * FIXME - else - ser_handles[SER_SPI]->status |= SERRF_RXFIFOOVERRUN; - */ - - /* Send */ - if (!fifo_isempty(&ser_handles[SER_SPI]->txfifo)) - SPDR = fifo_pop(&ser_handles[SER_SPI]->txfifo); - else - UARTDescs[SER_SPI].sending = false; - - SER_STROBE_OFF; -} +#endif /* WIZ_AUTOGEN */