4 * Copyright 2003, 2004, 2005 Develer S.r.l. (http://www.develer.com/)
5 * Copyright 2000, 2001, 2002 Bernardo Innocenti <bernie@codewiz.org>
6 * This file is part of DevLib - See README.devlib for information.
9 * \brief General pourpose debug support for embedded systems (implementation).
12 * \author Bernardo Innocenti <bernie@develer.com>
13 * \author Stefano Fedrigo <aleph@develer.com>
18 *#* Revision 1.25 2005/06/27 21:26:24 bernie
21 *#* Revision 1.24 2005/04/12 01:36:37 bernie
22 *#* Add hack to enable TX line at module initialization.
24 *#* Revision 1.23 2005/04/11 19:10:27 bernie
25 *#* Include top-level headers from cfg/ subdir.
27 *#* Revision 1.22 2005/02/18 11:18:33 bernie
28 *#* Fixes for Harvard processors from project_ks.
30 *#* Revision 1.21 2005/02/16 20:29:48 bernie
31 *#* TRACE(), TRACEMSG(): Reduce code and data footprint.
33 *#* Revision 1.20 2005/01/25 08:36:40 bernie
34 *#* kputnum(): Export.
36 *#* Revision 1.19 2004/12/31 17:47:45 bernie
37 *#* Rename UNUSED() to UNUSED_ARG().
40 #include <cfg/debug.h>
42 #include <cfg/macros.h> /* for BV() */
43 #include <appconfig.h>
46 #include <mware/formatwr.h> /* for _formatted_write() */
52 #define KDBG_WAIT_READY() do { /*nop*/ } while(0)
53 #define KDBG_WRITE_CHAR(c) putchar((c))
54 #define KDBG_MASK_IRQ(old) do { (void)(old); } while(0)
55 #define KDBG_RESTORE_IRQ(old) do { /*nop*/ } while(0)
56 typedef char kdbg_irqsave_t; /* unused */
59 #define KDBG_WAIT_READY() do {} while (!(SP_STAT & (SPSF_TX_EMPTY | SPSF_TX_INT)))
60 #define KDBG_WRITE_CHAR(c) do { SBUF = (c); } while(0)
61 #define KDBG_MASK_IRQ(old) \
63 (old) = INT_MASK1 & INT1F_TI; \
64 INT_MASK1 &= ~INT1F_TI; \
66 #define KDBG_RESTORE_IRQ(old) do { INT_MASK1 |= (old); }
67 typedef uint16_t kdbg_irqsave_t; /* FIXME: unconfirmed */
71 #if CONFIG_KDEBUG_PORT == 0
74 * Support for special bus policies or external transceivers
75 * on UART0 (to be overridden in "hw.h").
77 * HACK: if we don't set TXEN, kdbg disables the transmitter
78 * after each output statement until the serial driver
79 * is initialized. These glitches confuse the debug
80 * terminal that ends up printing some trash.
82 #ifndef KDBG_UART0_BUS_INIT
83 #define KDBG_UART0_BUS_INIT do { \
87 #ifndef KDBG_UART0_BUS_RX
88 #define KDBG_UART0_BUS_RX do {} while (0)
90 #ifndef KDBG_UART0_BUS_TX
91 #define KDBG_UART0_BUS_TX do {} while (0)
94 #if CPU_AVR_ATMEGA64 || CPU_AVR_ATMEGA128
105 #define KDBG_WAIT_READY() do { loop_until_bit_is_set(USR, UDRE); } while(0)
106 #define KDBG_WAIT_TXDONE() do { loop_until_bit_is_set(USR, TXC); } while(0)
109 * We must clear the TXC flag before sending a new character to allow
110 * KDBG_WAIT_TXDONE() to work properly.
112 * BUG: if KDBG_WRITE_CHAR() is called after the TXC flag is set by hardware,
113 * a new TXC could be generated after we've cleared it and before the new
114 * character is written to UDR. On a 485 bus, the transceiver will be put
115 * in RX mode while still transmitting the last char.
117 #define KDBG_WRITE_CHAR(c) do { USR |= BV(TXC); UDR = (c); } while(0)
119 #define KDBG_MASK_IRQ(old) do { \
122 UCR &= ~(BV(TXCIE) | BV(UDRIE)); \
126 #define KDBG_RESTORE_IRQ(old) do { \
127 KDBG_WAIT_TXDONE(); \
132 typedef uint8_t kdbg_irqsave_t;
134 #elif CONFIG_KDEBUG_PORT == 1
137 * Support for special bus policies or external transceivers
138 * on UART1 (to be overridden in "hw.h").
140 * HACK: if we don't set TXEN, kdbg disables the transmitter
141 * after each output statement until the serial driver
142 * is initialized. These glitches confuse the debug
143 * terminal that ends up printing some trash.
145 #ifndef KDBG_UART1_BUS_INIT
146 #define KDBG_UART1_BUS_INIT do { \
150 #ifndef KDBG_UART1_BUS_RX
151 #define KDBG_UART1_BUS_RX do {} while (0)
153 #ifndef KDBG_UART1_BUS_TX
154 #define KDBG_UART1_BUS_TX do {} while (0)
157 #define KDBG_WAIT_READY() do { loop_until_bit_is_set(UCSR1A, UDRE); } while(0)
158 #define KDBG_WAIT_TXDONE() do { loop_until_bit_is_set(UCSR1A, TXC); } while(0)
159 #define KDBG_WRITE_CHAR(c) do { UCSR1A |= BV(TXC); UDR1 = (c); } while(0)
161 #define KDBG_MASK_IRQ(old) do { \
163 UCSR1B |= BV(TXEN); \
164 UCSR1B &= ~(BV(TXCIE) | BV(UDRIE)); \
168 #define KDBG_RESTORE_IRQ(old) do { \
169 KDBG_WAIT_TXDONE(); \
174 typedef uint8_t kdbg_irqsave_t;
176 #error CONFIG_KDEBUG_PORT should be either 0 or 1
178 #elif defined(__MWERKS__) && CPU_DSP56K
179 /* Debugging go through the JTAG interface. The MSL library already
180 implements the console I/O correctly. */
182 #define KDBG_WAIT_READY() do { } while (0)
183 #define KDBG_WRITE_CHAR(c) __put_char(c, stdout)
184 #define KDBG_MASK_IRQ(old) do { (void)(old); } while (0)
185 #define KDBG_RESTORE_IRQ(old) do { (void)(old); } while (0)
186 typedef uint8_t kdbg_irqsave_t; /* unused */
188 #error Unknown architecture
196 /* Set serial port for 19200bps 8N1 */
197 INT_MASK1 &= ~(INT1F_TI | INT1F_RI);
198 SP_CON = SPCF_RECEIVE_ENABLE | SPCF_MODE1;
199 ioc1_img |= IOC1F_TXD_SEL | IOC1F_EXTINT_SRC;
206 /* Compute the baud rate */
207 uint16_t period = (((CLOCK_FREQ / 16UL) + (CONFIG_KDEBUG_BAUDRATE / 2)) / CONFIG_KDEBUG_BAUDRATE) - 1;
209 #if CPU_AVR_ATMEGA64 || CPU_AVR_ATMEGA128
210 #if CONFIG_KDEBUG_PORT == 0
211 UBRR0H = (uint8_t)(period>>8);
212 UBRR0L = (uint8_t)period;
214 #elif CONFIG_KDEBUG_PORT == 1
215 UBRR1H = (uint8_t)(period>>8);
216 UBRR1L = (uint8_t)period;
219 #error CONFIG_KDEBUG_PORT must be either 0 or 1
221 #elif CPU_AVR_ATMEGA8
222 UBRRH = (uint8_t)(period>>8);
223 UBRRL = (uint8_t)period;
224 #elif CPU_AVR_ATMEGA103
225 UBRR = (uint8_t)period;
231 #endif /* !CPU_I196 && !CPU_AVR */
233 kputs("\n\n*** DBG START ***\n");
238 * Output one character to the debug console
240 static void __kputchar(char c, UNUSED_ARG(void *, unused))
242 /* Poll while serial buffer is still busy */
245 /* Send '\n' as '\r\n' for dumb terminals */
248 KDBG_WRITE_CHAR('\r');
256 void kputchar(char c)
258 /* Mask serial TX intr */
259 kdbg_irqsave_t irqsave;
260 KDBG_MASK_IRQ(irqsave);
264 /* Restore serial TX intr */
265 KDBG_RESTORE_IRQ(irqsave);
269 static void PGM_FUNC(kvprintf)(const char * PGM_ATTR fmt, va_list ap)
272 /* Mask serial TX intr */
273 kdbg_irqsave_t irqsave;
274 KDBG_MASK_IRQ(irqsave);
276 PGM_FUNC(_formatted_write)(fmt, __kputchar, 0, ap);
278 /* Restore serial TX intr */
279 KDBG_RESTORE_IRQ(irqsave);
281 /* A better than nothing printf() surrogate. */
282 PGM_FUNC(kputs)(fmt);
283 #endif /* CONFIG_PRINTF */
286 void PGM_FUNC(kprintf)(const char * PGM_ATTR fmt, ...)
291 PGM_FUNC(kvprintf)(fmt, ap);
295 void PGM_FUNC(kputs)(const char * PGM_ATTR str)
299 /* Mask serial TX intr */
300 kdbg_irqsave_t irqsave;
301 KDBG_MASK_IRQ(irqsave);
303 while ((c = PGM_READ_CHAR(str++)))
306 KDBG_RESTORE_IRQ(irqsave);
311 * Cheap function to print small integers without using printf().
321 digit = num / divisor;
324 if (digit || output_len || divisor == 1)
326 kputchar(digit + '0');
330 while (divisor /= 10);
336 static void klocation(const char * PGM_ATTR file, int line)
338 PGM_FUNC(kputs)(file);
341 PGM_FUNC(kputs)(PGM_STR(": "));
344 int PGM_FUNC(__assert)(const char * PGM_ATTR cond, const char * PGM_ATTR file, int line)
346 klocation(file, line);
347 PGM_FUNC(kputs)(PGM_STR("Assertion failed: "));
348 PGM_FUNC(kputs)(cond);
354 * Unfortunately, there's no way to get __func__ in
355 * program memory, so we waste quite a lot of RAM in
356 * AVR and other Harvard processors.
358 void PGM_FUNC(__trace)(const char *name)
360 PGM_FUNC(kprintf)(PGM_STR("%s()\n"), name);
363 void PGM_FUNC(__tracemsg)(const char *name, const char * PGM_ATTR fmt, ...)
367 PGM_FUNC(kprintf)(PGM_STR("%s(): "), name);
369 PGM_FUNC(kvprintf)(fmt, ap);
374 int PGM_FUNC(__invalid_ptr)(void *value, const char * PGM_ATTR name, const char * PGM_ATTR file, int line)
376 klocation(file, line);
377 PGM_FUNC(kputs)(PGM_STR("Invalid ptr: "));
378 PGM_FUNC(kputs)(name);
380 PGM_FUNC(kprintf)(PGM_STR(" = 0x%x\n"), (unsigned int)value);
389 void __init_wall(long *wall, int size)
392 *wall++ = WALL_VALUE;
396 int PGM_FUNC(__check_wall)(long *wall, int size, const char * PGM_ATTR name, const char * PGM_ATTR file, int line)
400 for (i = 0; i < size; i++)
402 if (wall[i] != WALL_VALUE)
404 klocation(file, line);
405 PGM_FUNC(kputs)(PGM_STR("Wall broken: "));
406 PGM_FUNC(kputs)(name);
408 PGM_FUNC(kprintf)(PGM_STR("[%d] (0x%p) = 0x%lx\n"), i, wall + i, wall[i]);
423 * Dump binary data in hex
425 void kdump(const void *_buf, size_t len)
427 const unsigned char *buf = (const unsigned char *)_buf;
430 kprintf("%02X", *buf++);
434 #endif /* CONFIG_PRINTF */