X-Git-Url: https://codewiz.org/gitweb?a=blobdiff_plain;f=drv%2Fser_avr.c;h=1176659640d1e926864a0866f49899a73be7b28b;hb=46ac2c9347e738ee3c23109b83d522023ac4e7c9;hp=90d81fc429a4518bb213d897a21f52e0e819ab68;hpb=9481a995a29f4da2a91bcaac4a8406cd235a85e5;p=bertos.git

diff --git a/drv/ser_avr.c b/drv/ser_avr.c
index 90d81fc4..11766596 100755
--- a/drv/ser_avr.c
+++ b/drv/ser_avr.c
@@ -1,4 +1,4 @@
-/*!
+/**
  * \file
  * <!--
  * Copyright 2003, 2004 Develer S.r.l. (http://www.develer.com/)
@@ -38,6 +38,21 @@
 
 /*#*
  *#* $Log$
+ *#* Revision 1.34  2006/11/23 13:19:02  batt
+ *#* Add support for ATmega1281.
+ *#*
+ *#* Revision 1.33  2006/09/13 18:21:24  bernie
+ *#* Add configurable SPI pin mapping.
+ *#*
+ *#* Revision 1.32  2006/07/19 12:56:26  bernie
+ *#* Convert to new Doxygen style.
+ *#*
+ *#* Revision 1.31  2006/05/18 00:37:29  bernie
+ *#* Use hw_ser.h instead of ubiquitous hw.h.
+ *#*
+ *#* Revision 1.30  2006/02/17 22:23:06  bernie
+ *#* Update POSIX serial emulator.
+ *#*
  *#* Revision 1.29  2005/11/27 23:31:48  bernie
  *#* Support avr-libc 1.4.
  *#*
@@ -123,7 +138,9 @@
 
 #include "ser.h"
 #include "ser_p.h"
-#include "hw.h"  /* Required for bus macros overrides */
+
+#include <hw_ser.h>  /* Required for bus macros overrides */
+#include <hw_cpu.h>  /* CLOCK_FREQ */
 #include <appconfig.h>
 
 #include <cfg/debug.h>
@@ -139,19 +156,41 @@
 
 
 #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 */
+	#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
@@ -172,31 +211,31 @@
  * \{
  */
 #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(RXCIE) | BV(RXEN) | BV(TXEN); \
+		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(RXCIE) | BV(UDRIE) | BV(RXEN) | BV(TXEN); \
+		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 { \
@@ -205,7 +244,7 @@
 #endif
 
 #ifndef SER_UART0_BUS_TXEND
-	/*!
+	/**
 	 * Invoked as soon as the txfifo becomes empty
 	 *
 	 * - Keep both the receiver and the transmitter enabled
@@ -213,12 +252,12 @@
 	 * - Disable the UDR empty interrupt
 	 */
 	#define SER_UART0_BUS_TXEND do { \
-		UCSR0B = BV(RXCIE) | BV(RXEN) | BV(TXEN); \
+		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
@@ -231,31 +270,31 @@
 #endif
 
 #ifndef SER_UART1_BUS_TXINIT
-	/*! \sa SER_UART0_BUS_TXINIT */
+	/** \sa SER_UART0_BUS_TXINIT */
 	#define SER_UART1_BUS_TXINIT do { \
-		UCSR1B = BV(RXCIE) | BV(RXEN) | BV(TXEN); \
+		UCSR1B = BV(BIT_RXCIE1) | BV(BIT_RXEN1) | BV(BIT_TXEN1); \
 	} while (0)
 #endif
 #ifndef SER_UART1_BUS_TXBEGIN
-	/*! \sa SER_UART0_BUS_TXBEGIN */
+	/** \sa SER_UART0_BUS_TXBEGIN */
 	#define SER_UART1_BUS_TXBEGIN do { \
-		UCSR1B = BV(RXCIE) | BV(UDRIE) | BV(RXEN) | BV(TXEN); \
+		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 */
+	/** \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 */
+	/** \sa SER_UART0_BUS_TXEND */
 	#define SER_UART1_BUS_TXEND do { \
-		UCSR1B = BV(RXCIE) | BV(RXEN) | BV(TXEN); \
+		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
@@ -267,7 +306,7 @@
 /*\}*/
 
 
-/*!
+/**
  * \name Overridable SPI hooks
  *
  * These can be redefined in hw.h to implement
@@ -276,7 +315,7 @@
  * \{
  */
 #ifndef SER_SPI_BUS_TXINIT
-	/*!
+	/**
 	 * Default TXINIT macro - invoked in spi_init()
 	 * The default is no action.
 	 */
@@ -284,7 +323,7 @@
 #endif
 
 #ifndef SER_SPI_BUS_TXCLOSE
-	/*!
+	/**
 	 * Invoked after the last character has been transmitted.
 	 * The default is no action.
 	 */
@@ -294,15 +333,17 @@
 
 
 /* SPI port and pin configuration */
-#if CPU_AVR_ATMEGA64 || CPU_AVR_ATMEGA128 || CPU_AVR_ATMEGA103
+#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
@@ -311,7 +352,7 @@
 #endif
 
 /* USART register definitions */
-#if CPU_AVR_ATMEGA64 || CPU_AVR_ATMEGA128
+#if CPU_AVR_ATMEGA64 || CPU_AVR_ATMEGA128 || CPU_AVR_ATMEGA1281
 	#define AVR_HAS_UART1 1
 #elif CPU_AVR_ATMEGA8
 	#define AVR_HAS_UART1 0
@@ -338,7 +379,7 @@
 #endif
 
 
-/*!
+/**
  * \def CONFIG_SER_STROBE
  *
  * This is a debug facility that can be used to
@@ -369,7 +410,7 @@ 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
@@ -456,7 +497,7 @@ static void uart0_setbaudrate(UNUSED_ARG(struct SerialHardware *, _hw), unsigned
 static void uart0_setparity(UNUSED_ARG(struct SerialHardware *, _hw), int parity)
 {
 #if !CPU_AVR_ATMEGA103
-	UCSR0C = (UCSR0C & ~(BV(UPM1) | BV(UPM0))) | ((parity) << UPM0);
+	UCSR0C = (UCSR0C & ~(BV(UPM01) | BV(UPM00))) | ((parity) << UPM00);
 #endif
 }
 
@@ -506,7 +547,7 @@ static void uart1_setbaudrate(UNUSED_ARG(struct SerialHardware *, _hw), unsigned
 
 static void uart1_setparity(UNUSED_ARG(struct SerialHardware *, _hw), int parity)
 {
-	UCSR1C = (UCSR1C & ~(BV(UPM1) | BV(UPM0))) | ((parity) << UPM0);
+	UCSR1C = (UCSR1C & ~(BV(UPM11) | BV(UPM10))) | ((parity) << UPM10);
 }
 
 #endif // AVR_HAS_UART1
@@ -526,11 +567,60 @@ static void spi_init(UNUSED_ARG(struct SerialHardware *, _hw), UNUSED_ARG(struct
 	 * with the KBus serial RX, and the transmitter of the slave boards
 	 * would be unable to drive the line.
 	 */
-	SPI_DDR |= BV(SPI_MOSI_BIT) | BV(SPI_SCK_BIT);
-	SPI_DDR &= ~BV(SPI_MISO_BIT);
-	/* Enable SPI, IRQ on, Master, CPU_CLOCK/16 */
-	SPCR = BV(SPE) | BV(SPIE) | BV(MSTR) | BV(SPR0);
+	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.
+	 */
+	#warning SPI SS pin set as output for proper operation, check schematics for possible conflicts.
+	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
+	#else
+		#error Unsupported SPI clock division factor.
+	#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;
@@ -543,7 +633,7 @@ static void spi_cleanup(UNUSED_ARG(struct SerialHardware *, _hw))
 	SER_SPI_BUS_TXCLOSE;
 
 	/* Set all pins as inputs */
-	SPI_DDR &= ~(BV(SPI_MISO_BIT) | BV(SPI_MOSI_BIT) | BV(SPI_SCK_BIT));
+	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)
@@ -664,7 +754,7 @@ static struct AvrSerial UARTDescs[SER_CNT] =
 	}
 };
 
-struct SerialHardware* ser_hw_getdesc(int unit)
+struct SerialHardware *ser_hw_getdesc(int unit)
 {
 	ASSERT(unit < SER_CNT);
 	return &UARTDescs[unit].hw;
@@ -677,7 +767,7 @@ struct SerialHardware* ser_hw_getdesc(int unit)
 
 #if CONFIG_SER_HWHANDSHAKE
 
-//! This interrupt is triggered when the CTS line goes high
+/// This interrupt is triggered when the CTS line goes high
 SIGNAL(SIG_CTS)
 {
 	// Re-enable UDR empty interrupt and TX, then disable CTS interrupt
@@ -688,10 +778,10 @@ SIGNAL(SIG_CTS)
 #endif // CONFIG_SER_HWHANDSHAKE
 
 
-/*!
+/**
  * Serial 0 TX interrupt handler
  */
-SIGNAL(SIG_UART0_DATA)
+SIGNAL(USART0_UDRE_vect)
 {
 	SER_STROBE_ON;
 
@@ -724,7 +814,7 @@ SIGNAL(SIG_UART0_DATA)
 }
 
 #ifdef SER_UART0_BUS_TXOFF
-/*!
+/**
  * Serial port 0 TX complete interrupt handler.
  *
  * This IRQ is usually disabled.  The UDR-empty interrupt
@@ -759,10 +849,10 @@ SIGNAL(SIG_UART0_TRANS)
 
 #if AVR_HAS_UART1
 
-/*!
+/**
  * Serial 1 TX interrupt handler
  */
-SIGNAL(SIG_UART1_DATA)
+SIGNAL(USART1_UDRE_vect)
 {
 	SER_STROBE_ON;
 
@@ -795,7 +885,7 @@ SIGNAL(SIG_UART1_DATA)
 }
 
 #ifdef SER_UART1_BUS_TXOFF
-/*!
+/**
  * Serial port 1 TX complete interrupt handler.
  *
  * \sa port 0 TX complete handler.
@@ -820,7 +910,7 @@ SIGNAL(SIG_UART1_TRANS)
 #endif // AVR_HAS_UART1
 
 
-/*!
+/**
  * Serial 0 RX complete interrupt handler.
  *
  * This handler is interruptible.
@@ -835,7 +925,7 @@ SIGNAL(SIG_UART1_TRANS)
  *       RXCIE is cleared.  Unfortunately the RXC flag is read-only
  *       and can't be cleared by code.
  */
-SIGNAL(SIG_UART0_RECV)
+SIGNAL(USART0_RX_vect)
 {
 	SER_STROBE_ON;
 
@@ -874,7 +964,7 @@ SIGNAL(SIG_UART0_RECV)
 
 #if AVR_HAS_UART1
 
-/*!
+/**
  * Serial 1 RX complete interrupt handler.
  *
  * This handler is interruptible.
@@ -883,9 +973,9 @@ SIGNAL(SIG_UART0_RECV)
  * is heavily loaded, because an interrupt could be retriggered
  * when executing the handler prologue before RXCIE is disabled.
  *
- * \see SIGNAL(SIG_UART0_RECV)
+ * \see SIGNAL(USART1_RX_vect)
  */
-SIGNAL(SIG_UART1_RECV)
+SIGNAL(USART1_RX_vect)
 {
 	SER_STROBE_ON;
 
@@ -923,7 +1013,7 @@ SIGNAL(SIG_UART1_RECV)
 #endif // AVR_HAS_UART1
 
 
-/*!
+/**
  * SPI interrupt handler
  */
 SIGNAL(SIG_SPI)