/*#*
*#* $Log$
+ *#* Revision 1.29 2006/11/23 13:19:39 batt
+ *#* Add BitBanged serial debug console.
+ *#*
*#* Revision 1.28 2006/07/19 12:56:25 bernie
*#* Convert to new Doxygen style.
*#*
#include <cfg/macros.h> /* for BV() */
#include <appconfig.h>
#include <hw_cpu.h> /* for CLOCK_FREQ */
+#include <hw_ser.h> /* Required for bus macros overrides */
#include <mware/formatwr.h> /* for _formatted_write() */
#define KDBG_MASK_IRQ(old) do { (void)(old); } while(0)
#define KDBG_RESTORE_IRQ(old) do { /*nop*/ } while(0)
typedef char kdbg_irqsave_t; /* unused */
+
+ #if CONFIG_KDEBUG_PORT == 666
+ #error BITBANG debug console missing for this platform
+ #endif
#elif CPU_I196
#include "Util196.h"
#define KDBG_WAIT_READY() do {} while (!(SP_STAT & (SPSF_TX_EMPTY | SPSF_TX_INT)))
} while(0)
#define KDBG_RESTORE_IRQ(old) do { INT_MASK1 |= (old); }
typedef uint16_t kdbg_irqsave_t; /* FIXME: unconfirmed */
+
+ #if CONFIG_KDEBUG_PORT == 666
+ #error BITBANG debug console missing for this platform
+ #endif
#elif CPU_AVR
#include <avr/io.h>
/*
* Support for special bus policies or external transceivers
- * on UART0 (to be overridden in "hw.h").
+ * on UART0 (to be overridden in "hw_ser.h").
*
* HACK: if we don't set TXEN, kdbg disables the transmitter
* after each output statement until the serial driver
/*
* Support for special bus policies or external transceivers
- * on UART1 (to be overridden in "hw.h").
+ * on UART1 (to be overridden in "hw_ser.h").
*
* HACK: if we don't set TXEN, kdbg disables the transmitter
* after each output statement until the serial driver
} while(0)
typedef uint8_t kdbg_irqsave_t;
+
+ /*
+ * Special debug port for BitBanged Serial see below for details...
+ */
+ #elif CONFIG_KDEBUG_PORT == 666
+ #include "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 cpuflags_t kdbg_irqsave_t;
+
+ #define KDBG_DELAY (((CLOCK_FREQ + CONFIG_KDEBUG_BAUDRATE / 2) / CONFIG_KDEBUG_BAUDRATE) + 12) / 24
+
+ static void _kdebug_bitbang_delay(void)
+ {
+ unsigned long i;
+
+ for (i = 0; i < KDBG_DELAY; i++)
+ {
+ NOP;
+ NOP;
+ NOP;
+ NOP;
+ NOP;
+ NOP;
+ NOP;
+ NOP;
+ NOP;
+ NOP;
+ }
+ }
#else
- #error CONFIG_KDEBUG_PORT should be either 0 or 1
+ #error CONFIG_KDEBUG_PORT should be either 0, 1 or 666
#endif
#elif defined(__MWERKS__) && CPU_DSP56K
/* Debugging go through the JTAG interface. The MSL library already
#define KDBG_MASK_IRQ(old) do { (void)(old); } while (0)
#define KDBG_RESTORE_IRQ(old) do { (void)(old); } while (0)
typedef uint8_t kdbg_irqsave_t; /* unused */
+ #if CONFIG_KDEBUG_PORT == 666
+ #error BITBANG debug console missing for this platform
+ #endif
#else
#error Unknown architecture
#endif
+#if CONFIG_KDEBUG_PORT == 666
+ /**
+ * 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 usefull to 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;
+
+ /* Start bit */
+ SER_BITBANG_LOW;
+ _kdebug_bitbang_delay();
+
+ /* Shift out data */
+ for (i = 0; i < 8; i++)
+ {
+ if (c & BV(i))
+ SER_BITBANG_HIGH;
+ else
+ SER_BITBANG_LOW;
+ _kdebug_bitbang_delay();
+ }
+
+ /* Stop bit */
+ SER_BITBANG_HIGH;
+ _kdebug_bitbang_delay();
+ }
+#endif
+
+
+
void kdbg_init(void)
{
BAUD_RATE = 0x80;
#elif CPU_AVR
+ #if CONFIG_KDEBUG_PORT == 666
+ SER_BITBANG_INIT;
+ #else /* CONFIG_KDEBUG_PORT != 666 */
+ /* Compute the baud rate */
+ uint16_t period = (((CLOCK_FREQ / 16UL) + (CONFIG_KDEBUG_BAUDRATE / 2)) / CONFIG_KDEBUG_BAUDRATE) - 1;
- /* Compute the baud rate */
- uint16_t period = (((CLOCK_FREQ / 16UL) + (CONFIG_KDEBUG_BAUDRATE / 2)) / CONFIG_KDEBUG_BAUDRATE) - 1;
-
- #if CPU_AVR_ATMEGA64 || CPU_AVR_ATMEGA128
- #if CONFIG_KDEBUG_PORT == 0
- UBRR0H = (uint8_t)(period>>8);
- UBRR0L = (uint8_t)period;
+ #if CPU_AVR_ATMEGA64 || CPU_AVR_ATMEGA128
+ #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_ATMEGA8
+ UBRRH = (uint8_t)(period>>8);
+ UBRRL = (uint8_t)period;
+ #elif CPU_AVR_ATMEGA103
+ UBRR = (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
+ #error Unknown CPU
#endif
- #elif CPU_AVR_ATMEGA8
- UBRRH = (uint8_t)(period>>8);
- UBRRL = (uint8_t)period;
- #elif CPU_AVR_ATMEGA103
- UBRR = (uint8_t)period;
- KDBG_UART0_BUS_INIT;
- #else
- #error Unknown CPU
- #endif
+ #endif /* CONFIG_KDEBUG_PORT == 666 */
#endif /* !CPU_I196 && !CPU_AVR */
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