* invalidate any other reasons why the executable file might be covered by
* the GNU General Public License.
*
- * Copyright 2003, 2004, 2005, 2006, 2007 Develer S.r.l. (http://www.develer.com/)
- * Copyright 2000, 2001, 2002 Bernie Innocenti <bernie@codewiz.org>
+ * Copyright 2011 Develer S.r.l. (http://www.develer.com/)
*
* -->
*
- * \brief AVR debug support (implementation).
*
- * \author Bernie Innocenti <bernie@codewiz.org>
- * \author Stefano Fedrigo <aleph@develer.com>
- * \author Francesco Sacchi <batt@develer.com>
- */
-
-#include <hw/hw_cpufreq.h> /* for CPU_FREQ */
-#include "hw/hw_ser.h" /* Required for bus macros overrides */
-
-#include "cfg/cfg_debug.h"
-#include <cfg/macros.h> /* for BV(), DIV_ROUND */
-
-#include <cpu/types.h>
-#include <cpu/attr.h>
-
-#include <avr/io.h>
-
-#if CONFIG_KDEBUG_PORT == 0
-
- /*
- * Support for special bus policies or external transceivers
- * on UART0 (to be overridden in "hw/hw_ser.h").
- *
- * HACK: if we don't set TXEN, kdbg disables the transmitter
- * after each output statement until the serial driver
- * is initialized. These glitches confuse the debug
- * terminal that ends up printing some trash.
- */
- #ifndef KDBG_UART0_BUS_INIT
- #define KDBG_UART0_BUS_INIT do { \
- UCR = BV(TXEN0); \
- } while (0)
- #endif
- #ifndef KDBG_UART0_BUS_RX
- #define KDBG_UART0_BUS_RX do {} while (0)
- #endif
- #ifndef KDBG_UART0_BUS_TX
- #define KDBG_UART0_BUS_TX do {} while (0)
- #endif
-
- #if CPU_AVR_ATMEGA64 || CPU_AVR_ATMEGA128 || CPU_AVR_ATMEGA1281 || CPU_AVR_ATMEGA1280 \
- || CPU_AVR_ATMEGA168 || CPU_AVR_ATMEGA328P || CPU_AVR_ATMEGA2560
- #define UCR UCSR0B
- #define UDR UDR0
- #define USR UCSR0A
- #elif CPU_AVR_ATMEGA8 || CPU_AVR_ATMEGA32
- #define UCR UCSRB
- #define USR UCSRA
- #define TXEN0 TXEN
- #define UDRE0 UDRE
- #define TXC0 TXC
- #define TXCIE0 TXCIE
- #define UDRIE0 UDRIE
- #else
- #error Unknown CPU
- #endif
-
- #define KDBG_WAIT_READY() do { loop_until_bit_is_set(USR, UDRE0); } while(0)
- #define KDBG_WAIT_TXDONE() do { loop_until_bit_is_set(USR, TXC0); } while(0)
-
- /*
- * We must clear the TXC flag before sending a new character to allow
- * KDBG_WAIT_TXDONE() to work properly.
- *
- * BUG: if KDBG_WRITE_CHAR() is called after the TXC flag is set by hardware,
- * a new TXC could be generated after we've cleared it and before the new
- * character is written to UDR. On a 485 bus, the transceiver will be put
- * in RX mode while still transmitting the last char.
- */
- #define KDBG_WRITE_CHAR(c) do { USR |= BV(TXC0); UDR = (c); } while(0)
-
- #define KDBG_MASK_IRQ(old) do { \
- (old) = UCR; \
- UCR |= BV(TXEN0); \
- UCR &= ~(BV(TXCIE0) | BV(UDRIE0)); \
- KDBG_UART0_BUS_TX; \
- } while(0)
-
- #define KDBG_RESTORE_IRQ(old) do { \
- KDBG_WAIT_TXDONE(); \
- KDBG_UART0_BUS_RX; \
- UCR = (old); \
- } while(0)
-
- typedef uint8_t kdbg_irqsave_t;
-
-#elif CONFIG_KDEBUG_PORT == 1
-
- /*
- * Support for special bus policies or external transceivers
- * on UART1 (to be overridden in "hw/hw_ser.h").
- *
- * HACK: if we don't set TXEN, kdbg disables the transmitter
- * after each output statement until the serial driver
- * is initialized. These glitches confuse the debug
- * terminal that ends up printing some trash.
- */
- #ifndef KDBG_UART1_BUS_INIT
- #define KDBG_UART1_BUS_INIT do { \
- UCSR1B = BV(TXEN1); \
- } while (0)
- #endif
- #ifndef KDBG_UART1_BUS_RX
- #define KDBG_UART1_BUS_RX do {} while (0)
- #endif
- #ifndef KDBG_UART1_BUS_TX
- #define KDBG_UART1_BUS_TX do {} while (0)
- #endif
-
- #define KDBG_WAIT_READY() do { loop_until_bit_is_set(UCSR1A, UDRE1); } while(0)
- #define KDBG_WAIT_TXDONE() do { loop_until_bit_is_set(UCSR1A, TXC1); } while(0)
- #define KDBG_WRITE_CHAR(c) do { UCSR1A |= BV(TXC1); UDR1 = (c); } while(0)
-
- #define KDBG_MASK_IRQ(old) do { \
- (old) = UCSR1B; \
- UCSR1B |= BV(TXEN1); \
- UCSR1B &= ~(BV(TXCIE1) | BV(UDRIE1)); \
- KDBG_UART1_BUS_TX; \
- } while(0)
-
- #define KDBG_RESTORE_IRQ(old) do { \
- KDBG_WAIT_TXDONE(); \
- KDBG_UART1_BUS_RX; \
- UCSR1B = (old); \
- } while(0)
-
- typedef uint8_t kdbg_irqsave_t;
-
-#elif CONFIG_KDEBUG_PORT == 2
-
- /*
- * Support for special bus policies or external transceivers
- * on UART2 (to be overridden in "hw/hw_ser.h").
- *
- * HACK: if we don't set TXEN, kdbg disables the transmitter
- * after each output statement until the serial driver
- * is initialized. These glitches confuse the debug
- * terminal that ends up printing some trash.
- */
- #ifndef KDBG_UART2_BUS_INIT
- #define KDBG_UART2_BUS_INIT do { \
- UCSR2B = BV(TXEN2); \
- } while (0)
- #endif
- #ifndef KDBG_UART2_BUS_RX
- #define KDBG_UART2_BUS_RX do {} while (0)
- #endif
- #ifndef KDBG_UART2_BUS_TX
- #define KDBG_UART2_BUS_TX do {} while (0)
- #endif
-
- #define KDBG_WAIT_READY() do { loop_until_bit_is_set(UCSR2A, UDRE2); } while(0)
- #define KDBG_WAIT_TXDONE() do { loop_until_bit_is_set(UCSR2A, TXC2); } while(0)
- #define KDBG_WRITE_CHAR(c) do { UCSR2A |= BV(TXC2); UDR2 = (c); } while(0)
-
- #define KDBG_MASK_IRQ(old) do { \
- (old) = UCSR2B; \
- UCSR2B |= BV(TXEN2); \
- UCSR2B &= ~(BV(TXCIE2) | BV(UDRIE2)); \
- KDBG_UART2_BUS_TX; \
- } while(0)
-
- #define KDBG_RESTORE_IRQ(old) do { \
- KDBG_WAIT_TXDONE(); \
- KDBG_UART2_BUS_RX; \
- UCSR2B = (old); \
- } while(0)
-
- typedef uint8_t kdbg_irqsave_t;
-
-#elif CONFIG_KDEBUG_PORT == 3
-
- /*
- * Support for special bus policies or external transceivers
- * on UART3 (to be overridden in "hw/hw_ser.h").
- *
- * HACK: if we don't set TXEN, kdbg disables the transmitter
- * after each output statement until the serial driver
- * is initialized. These glitches confuse the debug
- * terminal that ends up printing some trash.
- */
- #ifndef KDBG_UART3_BUS_INIT
- #define KDBG_UART3_BUS_INIT do { \
- UCSR3B = BV(TXEN3); \
- } while (0)
- #endif
- #ifndef KDBG_UART3_BUS_RX
- #define KDBG_UART3_BUS_RX do {} while (0)
- #endif
- #ifndef KDBG_UART3_BUS_TX
- #define KDBG_UART3_BUS_TX do {} while (0)
- #endif
-
- #define KDBG_WAIT_READY() do { loop_until_bit_is_set(UCSR3A, UDRE3); } while(0)
- #define KDBG_WAIT_TXDONE() do { loop_until_bit_is_set(UCSR3A, TXC3); } while(0)
- #define KDBG_WRITE_CHAR(c) do { UCSR3A |= BV(TXC3); UDR3 = (c); } while(0)
-
- #define KDBG_MASK_IRQ(old) do { \
- (old) = UCSR3B; \
- UCSR3B |= BV(TXEN3); \
- UCSR3B &= ~(BV(TXCIE3) | BV(UDRIE3)); \
- KDBG_UART3_BUS_TX; \
- } while(0)
-
- #define KDBG_RESTORE_IRQ(old) do { \
- KDBG_WAIT_TXDONE(); \
- KDBG_UART3_BUS_RX; \
- UCSR3B = (old); \
- } while(0)
-
- typedef uint8_t kdbg_irqsave_t;
-
-
-/*
- * Special debug port for BitBanged Serial see below for details...
+ * \author Luca Ottaviano <lottaviano@develer.com>
+ *
+ * \brief Low-level kdebug module for AVR (inplementation).
*/
-#elif CONFIG_KDEBUG_PORT == 666
- #include "hw/hw_ser.h"
- #define KDBG_WAIT_READY() do { /*nop*/ } while(0)
- #define KDBG_WRITE_CHAR(c) _kdebug_bitbang_putchar((c))
- #define KDBG_MASK_IRQ(old) do { IRQ_SAVE_DISABLE((old)); } while(0)
- #define KDBG_RESTORE_IRQ(old) do { IRQ_RESTORE((old)); } while(0)
- typedef cpu_flags_t kdbg_irqsave_t;
-
- #define KDBG_DELAY (((CPU_FREQ + CONFIG_KDEBUG_BAUDRATE / 2) / CONFIG_KDEBUG_BAUDRATE) + 7) / 14
- static void _kdebug_bitbang_delay(void)
- {
- unsigned long i;
+#include <cpu/detect.h>
- for (i = 0; i < KDBG_DELAY; i++)
- {
- NOP;
- NOP;
- NOP;
- NOP;
- NOP;
- }
- }
-
- /**
- * Putchar for BITBANG serial debug console.
- * Sometimes, we can't permit to use a whole serial for debugging purpose.
- * Since debug console is in output only it is useful to use a single generic I/O pin for debug.
- * This is achieved by this simple function, that shift out the data like a UART, but
- * in software :)
- * The only requirement is that SER_BITBANG_* macros will be defined somewhere (usually hw_ser.h)
- * \note All interrupts are disabled during debug prints!
- */
- static void _kdebug_bitbang_putchar(char c)
- {
- int i;
- uint16_t data = c;
-
- /* Add stop bit */
- data |= 0x0100;
-
- /* Add start bit*/
- data <<= 1;
-
- /* Shift out data */
- uint16_t shift = 1;
- for (i = 0; i < 10; i++)
- {
- if (data & shift)
- SER_BITBANG_HIGH;
- else
- SER_BITBANG_LOW;
- _kdebug_bitbang_delay();
- shift <<= 1;
- }
- }
+#if CPU_AVR_MEGA
+ #include "kdebug_mega.c"
+#elif CPU_AVR_XMEGA
+ #include "kdebug_xmega.c"
#else
- #error CONFIG_KDEBUG_PORT should be either 0, 1, 2, 3 or 666
+ #error Unknown CPU
#endif
-
-
-INLINE void kdbg_hw_init(void)
-{
- #if CONFIG_KDEBUG_PORT == 666
- SER_BITBANG_INIT;
- #else /* CONFIG_KDEBUG_PORT != 666 */
- /* Compute the baud rate */
- uint16_t period = DIV_ROUND(CPU_FREQ / 16UL, CONFIG_KDEBUG_BAUDRATE) - 1;
-
- #if (CPU_AVR_ATMEGA64 || CPU_AVR_ATMEGA128 || CPU_AVR_ATMEGA1281)
- #if CONFIG_KDEBUG_PORT == 0
- UBRR0H = (uint8_t)(period>>8);
- UBRR0L = (uint8_t)period;
- KDBG_UART0_BUS_INIT;
- #elif CONFIG_KDEBUG_PORT == 1
- UBRR1H = (uint8_t)(period>>8);
- UBRR1L = (uint8_t)period;
- KDBG_UART1_BUS_INIT;
- #else
- #error CONFIG_KDEBUG_PORT must be either 0 or 1
- #endif
-
- #elif CPU_AVR_ATMEGA1280 || CPU_AVR_ATMEGA2560
- #if CONFIG_KDEBUG_PORT == 0
- UBRR0H = (uint8_t)(period>>8);
- UBRR0L = (uint8_t)period;
- KDBG_UART0_BUS_INIT;
- #elif CONFIG_KDEBUG_PORT == 1
- UBRR1H = (uint8_t)(period>>8);
- UBRR1L = (uint8_t)period;
- KDBG_UART1_BUS_INIT;
- #elif CONFIG_KDEBUG_PORT == 2
- UBRR2H = (uint8_t)(period>>8);
- UBRR2L = (uint8_t)period;
- KDBG_UART2_BUS_INIT;
- #elif CONFIG_KDEBUG_PORT == 3
- UBRR3H = (uint8_t)(period>>8);
- UBRR3L = (uint8_t)period;
- KDBG_UART3_BUS_INIT;
- #else
- #error CONFIG_KDEBUG_PORT must be either 0 or 1 or 2 or 3
- #endif
-
- #elif CPU_AVR_ATMEGA168 || CPU_AVR_ATMEGA328P
- #if CONFIG_KDEBUG_PORT == 0
- UBRR0H = (uint8_t)(period>>8);
- UBRR0L = (uint8_t)period;
- UCSR0A = 0; /* The Arduino Uno bootloader turns on U2X0 */
- KDBG_UART0_BUS_INIT;
- #else
- #error Only CONFIG_KDEBUG_PORT 0 is supported for this cpu
- #endif
-
- #elif CPU_AVR_ATMEGA8 || CPU_AVR_ATMEGA32
- #if CONFIG_KDEBUG_PORT == 0
- UBRRH = (uint8_t)(period>>8);
- UBRRL = (uint8_t)period;
- KDBG_UART0_BUS_INIT;
- #else
- #error Only CONFIG_KDEBUG_PORT 0 is supported for this cpu
- #endif
- #elif CPU_AVR_ATMEGA103
- #if CONFIG_KDEBUG_PORT == 0
- UBRR = (uint8_t)period;
- KDBG_UART0_BUS_INIT;
- #else
- #error Only CONFIG_KDEBUG_PORT 0 is supported for this cpu
- #endif
- #else
- #error Unknown CPU
- #endif
- #endif /* CONFIG_KDEBUG_PORT == 666 */
-}
-
projects / bertos.git / blobdiff