1 /*=============================================================================
5 // HAL diagnostic output code
7 //=============================================================================
8 //####ECOSGPLCOPYRIGHTBEGIN####
9 // -------------------------------------------
10 // This file is part of eCos, the Embedded Configurable Operating System.
11 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
13 // eCos is free software; you can redistribute it and/or modify it under
14 // the terms of the GNU General Public License as published by the Free
15 // Software Foundation; either version 2 or (at your option) any later version.
17 // eCos is distributed in the hope that it will be useful, but WITHOUT ANY
18 // WARRANTY; without even the implied warranty of MERCHANTABILITY or
19 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
22 // You should have received a copy of the GNU General Public License along
23 // with eCos; if not, write to the Free Software Foundation, Inc.,
24 // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
26 // As a special exception, if other files instantiate templates or use macros
27 // or inline functions from this file, or you compile this file and link it
28 // with other works to produce a work based on this file, this file does not
29 // by itself cause the resulting work to be covered by the GNU General Public
30 // License. However the source code for this file must still be made available
31 // in accordance with section (3) of the GNU General Public License.
33 // This exception does not invalidate any other reasons why a work based on
34 // this file might be covered by the GNU General Public License.
36 // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
37 // at http://sources.redhat.com/ecos/ecos-license/
38 // -------------------------------------------
39 //####ECOSGPLCOPYRIGHTEND####
40 //===========================================================================*/
42 #include <pkgconf/hal.h>
43 #include <pkgconf/system.h>
44 #include CYGBLD_HAL_PLATFORM_H
46 #include <cyg/infra/cyg_type.h> // base types
47 #include <cyg/infra/cyg_trac.h> // tracing macros
48 #include <cyg/infra/cyg_ass.h> // assertion macros
50 #include <cyg/hal/hal_arch.h> // basic machine info
51 #include <cyg/hal/hal_intr.h> // interrupt macros
52 #include <cyg/hal/hal_io.h> // IO macros
53 #include <cyg/hal/hal_if.h> // Calling interface definitions
54 #include <cyg/hal/hal_diag.h>
55 #include <cyg/hal/drv_api.h> // cyg_drv_interrupt_acknowledge
56 #include <cyg/hal/hal_misc.h> // Helper functions
57 #include <cyg/hal/hal_soc.h> // Hardware definitions
60 * UART Control Register 0 Bit Fields.
62 #define EUartUCR1_ADEN (1 << 15) // Auto dectect interrupt
63 #define EUartUCR1_ADBR (1 << 14) // Auto detect baud rate
64 #define EUartUCR1_TRDYEN (1 << 13) // Transmitter ready interrupt enable
65 #define EUartUCR1_IDEN (1 << 12) // Idle condition interrupt
66 #define EUartUCR1_RRDYEN (1 << 9) // Recv ready interrupt enable
67 #define EUartUCR1_RDMAEN (1 << 8) // Recv ready DMA enable
68 #define EUartUCR1_IREN (1 << 7) // Infrared interface enable
69 #define EUartUCR1_TXMPTYEN (1 << 6) // Transimitter empty interrupt enable
70 #define EUartUCR1_RTSDEN (1 << 5) // RTS delta interrupt enable
71 #define EUartUCR1_SNDBRK (1 << 4) // Send break
72 #define EUartUCR1_TDMAEN (1 << 3) // Transmitter ready DMA enable
73 #define EUartUCR1_DOZE (1 << 1) // Doze
74 #define EUartUCR1_UARTEN (1 << 0) // UART enabled
75 #define EUartUCR2_ESCI (1 << 15) // Escape seq interrupt enable
76 #define EUartUCR2_IRTS (1 << 14) // Ignore RTS pin
77 #define EUartUCR2_CTSC (1 << 13) // CTS pin control
78 #define EUartUCR2_CTS (1 << 12) // Clear to send
79 #define EUartUCR2_ESCEN (1 << 11) // Escape enable
80 #define EUartUCR2_PREN (1 << 8) // Parity enable
81 #define EUartUCR2_PROE (1 << 7) // Parity odd/even
82 #define EUartUCR2_STPB (1 << 6) // Stop
83 #define EUartUCR2_WS (1 << 5) // Word size
84 #define EUartUCR2_RTSEN (1 << 4) // Request to send interrupt enable
85 #define EUartUCR2_ATEN (1 << 3) // Aging timer enable
86 #define EUartUCR2_TXEN (1 << 2) // Transmitter enabled
87 #define EUartUCR2_RXEN (1 << 1) // Receiver enabled
88 #define EUartUCR2_SRST_ (1 << 0) // SW reset
89 #define EUartUCR3_PARERREN (1 << 12) // Parity enable
90 #define EUartUCR3_FRAERREN (1 << 11) // Frame error interrupt enable
91 #define EUartUCR3_ADNIMP (1 << 7) // Autobaud detection not improved
92 #define EUartUCR3_RXDSEN (1 << 6) // Receive status interrupt enable
93 #define EUartUCR3_AIRINTEN (1 << 5) // Async IR wake interrupt enable
94 #define EUartUCR3_AWAKEN (1 << 4) // Async wake interrupt enable
95 #define EUartUCR3_RXDMUXSEL (1 << 2) // RXD muxed input selected
96 #define EUartUCR3_INVT (1 << 1) // Inverted Infrared transmission
97 #define EUartUCR3_ACIEN (1 << 0) // Autobaud counter interrupt enable
98 #define EUartUCR4_CTSTL_32 (32 << 10) // CTS trigger level (32 chars)
99 #define EUartUCR4_INVR (1 << 9) // Inverted infrared reception
100 #define EUartUCR4_ENIRI (1 << 8) // Serial infrared interrupt enable
101 #define EUartUCR4_WKEN (1 << 7) // Wake interrupt enable
102 #define EUartUCR4_IRSC (1 << 5) // IR special case
103 #define EUartUCR4_LPBYP (1 << 4) // Low power bypass
104 #define EUartUCR4_TCEN (1 << 3) // Transmit complete interrupt enable
105 #define EUartUCR4_BKEN (1 << 2) // Break condition interrupt enable
106 #define EUartUCR4_OREN (1 << 1) // Receiver overrun interrupt enable
107 #define EUartUCR4_DREN (1 << 0) // Recv data ready interrupt enable
108 #define EUartUFCR_RXTL_SHF 0 // Receiver trigger level shift
109 #define EUartUFCR_RFDIV_1 (5 << 7) // Reference freq divider (div 1)
110 #define EUartUFCR_RFDIV_2 (4 << 7) // Reference freq divider (div 2)
111 #define EUartUFCR_RFDIV_3 (3 << 7) // Reference freq divider (div 3)
112 #define EUartUFCR_RFDIV_4 (2 << 7) // Reference freq divider (div 4)
113 #define EUartUFCR_RFDIV_5 (1 << 7) // Reference freq divider (div 5)
114 #define EUartUFCR_RFDIV_6 (0 << 7) // Reference freq divider (div 6)
115 #define EUartUFCR_RFDIV_7 (6 << 7) // Reference freq divider (div 7)
116 #define EUartUFCR_TXTL_SHF 10 // Transmitter trigger level shift
117 #define EUartUSR1_PARITYERR (1 << 15) // Parity error interrupt flag
118 #define EUartUSR1_RTSS (1 << 14) // RTS pin status
119 #define EUartUSR1_TRDY (1 << 13) // Transmitter ready interrupt/dma flag
120 #define EUartUSR1_RTSD (1 << 12) // RTS delta
121 #define EUartUSR1_ESCF (1 << 11) // Escape seq interrupt flag
122 #define EUartUSR1_FRAMERR (1 << 10) // Frame error interrupt flag
123 #define EUartUSR1_RRDY (1 << 9) // Receiver ready interrupt/dma flag
124 #define EUartUSR1_AGTIM (1 << 8) // Aging timeout interrupt status
125 #define EUartUSR1_RXDS (1 << 6) // Receiver idle interrupt flag
126 #define EUartUSR1_AIRINT (1 << 5) // Async IR wake interrupt flag
127 #define EUartUSR1_AWAKE (1 << 4) // Aysnc wake interrupt flag
128 #define EUartUSR2_ADET (1 << 15) // Auto baud rate detect complete
129 #define EUartUSR2_TXFE (1 << 14) // Transmit buffer FIFO empty
130 #define EUartUSR2_IDLE (1 << 12) // Idle condition
131 #define EUartUSR2_ACST (1 << 11) // Autobaud counter stopped
132 #define EUartUSR2_IRINT (1 << 8) // Serial infrared interrupt flag
133 #define EUartUSR2_WAKE (1 << 7) // Wake
134 #define EUartUSR2_RTSF (1 << 4) // RTS edge interrupt flag
135 #define EUartUSR2_TXDC (1 << 3) // Transmitter complete
136 #define EUartUSR2_BRCD (1 << 2) // Break condition
137 #define EUartUSR2_ORE (1 << 1) // Overrun error
138 #define EUartUSR2_RDR (1 << 0) // Recv data ready
139 #define EUartUTS_FRCPERR (1 << 13) // Force parity error
140 #define EUartUTS_LOOP (1 << 12) // Loop tx and rx
141 #define EUartUTS_TXEMPTY (1 << 6) // TxFIFO empty
142 #define EUartUTS_RXEMPTY (1 << 5) // RxFIFO empty
143 #define EUartUTS_TXFULL (1 << 4) // TxFIFO full
144 #define EUartUTS_RXFULL (1 << 3) // RxFIFO full
145 #define EUartUTS_SOFTRST (1 << 0) // Software reset
146 #define RFDIV 2 /* Ref Clock Divisor */
147 #define MXC_UART_REFFREQ ((CKIH_CLK_FREQ*2) / RFDIV)
149 void cyg_hal_plf_serial_init(void);
153 cyg_hal_plf_comms_init(void)
155 static int initialized = 0;
162 cyg_hal_plf_serial_init();
166 //=============================================================================
167 // MXC Serial Port (UARTx) for Debug
168 //=============================================================================
171 volatile cyg_uint32 urxd[16];
172 volatile cyg_uint32 utxd[16];
173 volatile cyg_uint32 ucr1;
174 volatile cyg_uint32 ucr2;
175 volatile cyg_uint32 ucr3;
176 volatile cyg_uint32 ucr4;
177 volatile cyg_uint32 ufcr;
178 volatile cyg_uint32 usr1;
179 volatile cyg_uint32 usr2;
180 volatile cyg_uint32 uesc;
181 volatile cyg_uint32 utim;
182 volatile cyg_uint32 ubir;
183 volatile cyg_uint32 ubmr;
184 volatile cyg_uint32 ubrc;
185 volatile cyg_uint32 onems;
186 volatile cyg_uint32 uts;
190 volatile cyg_uint16 urxd[1];
191 volatile cyg_uint16 resv0[31];
193 volatile cyg_uint16 utxd[1];
194 volatile cyg_uint16 resv1[31];
195 volatile cyg_uint16 ucr1;
196 volatile cyg_uint16 resv2;
197 volatile cyg_uint16 ucr2;
198 volatile cyg_uint16 resv3;
199 volatile cyg_uint16 ucr3;
200 volatile cyg_uint16 resv4;
201 volatile cyg_uint16 ucr4;
202 volatile cyg_uint16 resv5;
203 volatile cyg_uint16 ufcr;
204 volatile cyg_uint16 resv6;
205 volatile cyg_uint16 usr1;
206 volatile cyg_uint16 resv7;
207 volatile cyg_uint16 usr2;
208 volatile cyg_uint16 resv8;
209 volatile cyg_uint16 uesc;
210 volatile cyg_uint16 resv9;
211 volatile cyg_uint16 utim;
212 volatile cyg_uint16 resv10;
213 volatile cyg_uint16 ubir;
214 volatile cyg_uint16 resv11;
215 volatile cyg_uint16 ubmr;
216 volatile cyg_uint16 resv12;
217 volatile cyg_uint16 ubrc;
218 volatile cyg_uint16 resv13;
219 volatile cyg_uint16 onems;
220 volatile cyg_uint16 resv14;
221 volatile cyg_uint16 uts;
222 volatile cyg_uint16 resv15;
227 volatile struct mxc_serial* base;
228 cyg_int32 msec_timeout;
233 static channel_data_t channels[] = {
234 #if CYGHWR_HAL_ARM_SOC_UART1 != 0
235 {(volatile struct mxc_serial*)UART1_BASE_ADDR, 1000,
236 CYGNUM_HAL_INTERRUPT_UART1, CYGNUM_HAL_VIRTUAL_VECTOR_CONSOLE_CHANNEL_BAUD},
238 #if CYGHWR_HAL_ARM_SOC_UART2 != 0
239 {(volatile struct mxc_serial*)UART2_BASE_ADDR, 1000,
240 CYGNUM_HAL_INTERRUPT_UART2, CYGNUM_HAL_VIRTUAL_VECTOR_CONSOLE_CHANNEL_BAUD},
242 #if CYGHWR_HAL_ARM_SOC_UART3 != 0
243 {(volatile struct mxc_serial*)UART3_BASE_ADDR, 1000,
244 CYGNUM_HAL_INTERRUPT_UART3, CYGNUM_HAL_VIRTUAL_VECTOR_CONSOLE_CHANNEL_BAUD},
248 /*---------------------------------------------------------------------------*/
250 static void init_serial_channel(channel_data_t* __ch_data)
252 volatile struct mxc_serial* base = __ch_data->base;
254 /* Wait for UART to finish transmitting */
255 while (!(base->uts & EUartUTS_TXEMPTY));
258 base->ucr1 &= ~EUartUCR1_UARTEN;
260 /* Set to default POR state */
261 base->ucr1 = 0x00000000;
262 base->ucr2 = 0x00000000;
264 while (!(base->ucr2 & EUartUCR2_SRST_));
266 base->ucr3 = 0x00000700;
267 base->ucr4 = 0x00008000;
268 base->ufcr = 0x00000801;
269 base->uesc = 0x0000002B;
270 base->utim = 0x00000000;
271 base->ubir = 0x00000000;
272 base->ubmr = 0x00000000;
273 base->onems = 0x00000000;
274 base->uts = 0x00000000;
276 /* Configure FIFOs */
277 base->ufcr = (1 << EUartUFCR_RXTL_SHF) | EUartUFCR_RFDIV_2
278 | (2 << EUartUFCR_TXTL_SHF);
280 /* Setup One MS timer */
281 base->onems = (MXC_UART_REFFREQ / 1000);
284 base->ucr2 &= ~EUartUCR2_PREN;
285 base->ucr2 |= EUartUCR2_WS;
286 base->ucr2 &= ~EUartUCR2_STPB;
289 base->ucr2 |= EUartUCR2_IRTS;
292 base->ucr1 |= EUartUCR1_UARTEN;
295 base->ucr2 |= EUartUCR2_SRST_ | EUartUCR2_RXEN | EUartUCR2_TXEN;
297 /* Clear status flags */
298 base->usr2 |= EUartUSR2_ADET |
307 /* Clear status flags */
308 base->usr1 |= EUartUSR1_PARITYERR |
315 /* Set the numerator value minus one of the BRM ratio */
316 base->ubir = (__ch_data->baud_rate / 100) - 1;
318 /* Set the denominator value minus one of the BRM ratio */
319 base->ubmr = ((MXC_UART_REFFREQ / 1600) - 1);
322 static void stop_serial_channel(channel_data_t* __ch_data)
324 volatile struct mxc_serial* base = __ch_data->base;
326 /* Wait for UART to finish transmitting */
327 while (!(base->uts & EUartUTS_TXEMPTY));
330 base->ucr1 &= ~EUartUCR1_UARTEN;
333 void cyg_hal_plf_serial_putc(void *__ch_data, char c)
335 volatile struct mxc_serial* base = ((channel_data_t*)__ch_data)->base;
336 CYGARC_HAL_SAVE_GP();
338 // Wait for Tx FIFO not full
339 while (base->uts & EUartUTS_TXFULL)
343 CYGARC_HAL_RESTORE_GP();
346 static cyg_bool cyg_hal_plf_serial_getc_nonblock(void* __ch_data,
349 volatile struct mxc_serial* base = ((channel_data_t*)__ch_data)->base;
351 // If receive fifo is empty, return false
352 if (base->uts & EUartUTS_RXEMPTY)
355 *ch = (char)base->urxd[0];
360 cyg_uint8 cyg_hal_plf_serial_getc(void* __ch_data)
363 CYGARC_HAL_SAVE_GP();
365 while (!cyg_hal_plf_serial_getc_nonblock(__ch_data, &ch));
367 CYGARC_HAL_RESTORE_GP();
371 static void cyg_hal_plf_serial_write(void* __ch_data, const cyg_uint8* __buf,
374 CYGARC_HAL_SAVE_GP();
377 cyg_hal_plf_serial_putc(__ch_data, *__buf++);
379 CYGARC_HAL_RESTORE_GP();
382 static void cyg_hal_plf_serial_read(void* __ch_data, cyg_uint8* __buf,
385 CYGARC_HAL_SAVE_GP();
388 *__buf++ = cyg_hal_plf_serial_getc(__ch_data);
390 CYGARC_HAL_RESTORE_GP();
393 cyg_bool cyg_hal_plf_serial_getc_timeout(void* __ch_data,
397 channel_data_t* chan = (channel_data_t*)__ch_data;
399 CYGARC_HAL_SAVE_GP();
401 delay_count = chan->msec_timeout * 10; // delay in .1 ms steps
404 res = cyg_hal_plf_serial_getc_nonblock(__ch_data, ch);
405 if (res || 0 == delay_count--)
408 CYGACC_CALL_IF_DELAY_US(100);
411 CYGARC_HAL_RESTORE_GP();
415 static int cyg_hal_plf_serial_control(void *__ch_data,
416 __comm_control_cmd_t __func, ...)
418 static int irq_state = 0;
419 channel_data_t* chan = (channel_data_t*)__ch_data;
423 CYGARC_HAL_SAVE_GP();
424 va_start(ap, __func);
427 case __COMMCTL_GETBAUD:
428 ret = chan->baud_rate;
430 case __COMMCTL_SETBAUD:
431 chan->baud_rate = va_arg(ap, cyg_int32);
432 // Should we verify this value here?
433 init_serial_channel(chan);
436 case __COMMCTL_IRQ_ENABLE:
439 chan->base->ucr1 |= EUartUCR1_RRDYEN;
441 HAL_INTERRUPT_UNMASK(chan->isr_vector);
443 case __COMMCTL_IRQ_DISABLE:
447 chan->base->ucr1 &= ~EUartUCR1_RRDYEN;
449 HAL_INTERRUPT_MASK(chan->isr_vector);
451 case __COMMCTL_DBG_ISR_VECTOR:
452 ret = chan->isr_vector;
454 case __COMMCTL_SET_TIMEOUT:
455 ret = chan->msec_timeout;
456 chan->msec_timeout = va_arg(ap, cyg_uint32);
462 CYGARC_HAL_RESTORE_GP();
466 static int cyg_hal_plf_serial_isr(void *__ch_data, int* __ctrlc,
467 CYG_ADDRWORD __vector, CYG_ADDRWORD __data)
470 channel_data_t* chan = (channel_data_t*)__ch_data;
473 CYGARC_HAL_SAVE_GP();
475 cyg_drv_interrupt_acknowledge(chan->isr_vector);
478 if (!(chan->base->uts & EUartUTS_RXEMPTY)) {
479 c = (char)chan->base->urxd[0];
481 if (cyg_hal_is_break( &c , 1 ))
484 res = CYG_ISR_HANDLED;
487 CYGARC_HAL_RESTORE_GP();
491 void cyg_hal_plf_serial_init(void)
493 hal_virtual_comm_table_t* comm;
494 int cur = CYGACC_CALL_IF_SET_CONSOLE_COMM(CYGNUM_CALL_IF_SET_COMM_ID_QUERY_CURRENT);
499 #define NUMOF(x) (sizeof(x)/sizeof(x[0]))
500 for (i = 0; i < NUMOF(channels); i++) {
501 init_serial_channel(&channels[i]);
502 CYGACC_CALL_IF_SET_CONSOLE_COMM(i+2);
503 comm = CYGACC_CALL_IF_CONSOLE_PROCS();
504 CYGACC_COMM_IF_CH_DATA_SET(*comm, &channels[i]);
505 CYGACC_COMM_IF_WRITE_SET(*comm, cyg_hal_plf_serial_write);
506 CYGACC_COMM_IF_READ_SET(*comm, cyg_hal_plf_serial_read);
507 CYGACC_COMM_IF_PUTC_SET(*comm, cyg_hal_plf_serial_putc);
508 CYGACC_COMM_IF_GETC_SET(*comm, cyg_hal_plf_serial_getc);
509 CYGACC_COMM_IF_CONTROL_SET(*comm, cyg_hal_plf_serial_control);
510 CYGACC_COMM_IF_DBG_ISR_SET(*comm, cyg_hal_plf_serial_isr);
511 CYGACC_COMM_IF_GETC_TIMEOUT_SET(*comm, cyg_hal_plf_serial_getc_timeout);
513 cyg_hal_plf_serial_putc(&channels[i], '+');
516 cyg_hal_plf_serial_putc(&channels[i], '+');
519 // Restore original console
520 CYGACC_CALL_IF_SET_CONSOLE_COMM(cur);
523 void cyg_hal_plf_serial_stop(void)
528 #define NUMOF(x) (sizeof(x)/sizeof(x[0]))
529 for (i = 0; i < NUMOF(channels); i++) {
530 stop_serial_channel(&channels[i]);
534 //=============================================================================
535 // Compatibility with older stubs
536 //=============================================================================
538 #ifndef CYGSEM_HAL_VIRTUAL_VECTOR_DIAG
540 #include <cyg/hal/hal_stub.h> // cyg_hal_gdb_interrupt
542 #if (CYGNUM_HAL_VIRTUAL_VECTOR_CONSOLE_CHANNEL == 2)
543 #define __BASE ((void*)UART1_BASE_ADDR)
544 #define CYGHWR_HAL_GDB_PORT_VECTOR CYGNUM_HAL_INTERRUPT_UART1
545 #elif (CYGNUM_HAL_VIRTUAL_VECTOR_CONSOLE_CHANNEL == 3)
546 #define __BASE ((void*)UART2_BASE_ADDR)
547 #define CYGHWR_HAL_GDB_PORT_VECTOR CYGNUM_HAL_INTERRUPT_UART2
548 #elif (CYGNUM_HAL_VIRTUAL_VECTOR_CONSOLE_CHANNEL == 4)
549 #define __BASE ((void*)UART3_BASE_ADDR)
550 #define CYGHWR_HAL_GDB_PORT_VECTOR CYGNUM_HAL_INTERRUPT_UART3
555 #ifdef CYGSEM_HAL_ROM_MONITOR
556 #define CYG_HAL_STARTUP_ROM
557 #define CYG_HAL_STARTUP_ROMRAM
558 #undef CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS
561 #if (defined(CYG_HAL_STARTUP_ROM) || defined(CYG_HAL_STARTUP_ROMRAM)) && !defined(CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS)
562 #define HAL_DIAG_USES_HARDWARE
563 #elif !defined(CYGDBG_HAL_DIAG_TO_DEBUG_CHAN)
564 #define HAL_DIAG_USES_HARDWARE
565 #elif CYGNUM_HAL_VIRTUAL_VECTOR_CONSOLE_CHANNEL != CYGNUM_HAL_VIRTUAL_VECTOR_DEBUG_CHANNEL
566 #define HAL_DIAG_USES_HARDWARE
569 static channel_data_t channel = {
570 (volatile struct mxc_serial*)__BASE, 0, CYGHWR_HAL_GDB_PORT_VECTOR
573 #ifdef HAL_DIAG_USES_HARDWARE
575 void hal_diag_init(void)
578 char *msg = "\n\rARM eCos\n\r";
583 init_serial_channel(&channel);
585 while (*msg) hal_diag_write_char(*msg++);
589 #ifndef CYG_HAL_STARTUP_ROM
590 #define DIAG_BUFSIZE 2048
591 static char diag_buffer[DIAG_BUFSIZE];
592 static int diag_bp = 0;
596 void hal_diag_write_char(char c)
599 #ifndef CYG_HAL_STARTUP_ROM
600 diag_buffer[diag_bp++] = c;
601 if (diag_bp == sizeof(diag_buffer)) diag_bp = 0;
604 cyg_hal_plf_serial_putc(&channel, c);
607 void hal_diag_read_char(char *c)
609 *c = cyg_hal_plf_serial_getc(&channel);
612 #else // not HAL_DIAG_USES_HARDWARE - it uses GDB protocol
614 void hal_diag_read_char(char *c)
616 *c = cyg_hal_plf_serial_getc(&channel);
619 void hal_diag_write_char(char c)
621 static char line[100];
624 // FIXME: Some LED blinking might be nice right here.
626 // No need to send CRs
627 if (c == '\r') return;
631 if (c == '\n' || pos == sizeof(line)) {
632 CYG_INTERRUPT_STATE old;
634 // Disable interrupts. This prevents GDB trying to interrupt us
635 // while we are in the middle of sending a packet. The serial
636 // receive interrupt will be seen when we re-enable interrupts
639 #ifdef CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS
640 CYG_HAL_GDB_ENTER_CRITICAL_IO_REGION(old);
642 HAL_DISABLE_INTERRUPTS(old);
646 static char hex[] = "0123456789ABCDEF";
649 #ifndef CYGDBG_HAL_DEBUG_GDB_CTRLC_SUPPORT
652 cyg_hal_plf_serial_putc(&channel, '$');
653 cyg_hal_plf_serial_putc(&channel, 'O');
655 for (i = 0; i < pos; i++) {
657 char h = hex[(ch>>4)&0xF];
658 char l = hex[ch&0xF];
659 cyg_hal_plf_serial_putc(&channel, h);
660 cyg_hal_plf_serial_putc(&channel, l);
664 cyg_hal_plf_serial_putc(&channel, '#');
665 cyg_hal_plf_serial_putc(&channel, hex[(csum>>4)&0xF]);
666 cyg_hal_plf_serial_putc(&channel, hex[csum&0xF]);
668 #ifdef CYGDBG_HAL_DEBUG_GDB_CTRLC_SUPPORT
672 #else // not CYGDBG_HAL_DEBUG_GDB_CTRLC_SUPPORT Ie. usually...
674 // Wait for the ACK character '+' from GDB here and handle
675 // receiving a ^C instead. This is the reason for this clause
677 c1 = cyg_hal_plf_serial_getc(&channel);
680 break; // a good acknowledge
682 #ifdef CYGDBG_HAL_DEBUG_GDB_BREAK_SUPPORT
683 cyg_drv_interrupt_acknowledge(CYGHWR_HAL_GDB_PORT_VECTOR);
685 // Ctrl-C: breakpoint.
686 cyg_hal_gdb_interrupt(
687 (target_register_t)__builtin_return_address(0) );
690 #endif // CYGDBG_HAL_DEBUG_GDB_BREAK_SUPPORT
692 #endif // ! CYGDBG_HAL_DEBUG_GDB_CTRLC_SUPPORT
693 // otherwise, loop round again
698 // And re-enable interrupts
699 #ifdef CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS
700 CYG_HAL_GDB_LEAVE_CRITICAL_IO_REGION(old);
702 HAL_RESTORE_INTERRUPTS(old);
711 #endif // !CYGSEM_HAL_VIRTUAL_VECTOR_DIAG
713 /*---------------------------------------------------------------------------*/
714 /* End of hal_diag.c */