--- /dev/null
+# GDB-Stub Protocol Startup
+
+* `--->` Request or Acknownledge from *avr-gdb* to *gdb-stub* (in µC)
+* `<---` Response or Notification from *gdb-stub* (in µC) to *avr-gdb*
+
+## 1 Request/Response
+
+[https://sourceware.org/gdb/onlinedocs/gdb/General-Query-Packets.html#index-qSupported-packet](https://sourceware.org/gdb/onlinedocs/gdb/General-Query-Packets.html#index-qSupported-packet)
+
+
+Tell the remote stub about features supported by GDB, and query the stub for features it supports.
+
+```
+---> +
+---> $qSupported:multiprocess+;swbreak+;hwbreak+;qRelocInsn+;fork-events+;vfork-events+;exec-events+;vContSupported+;QThreadEvents+;no-resumed+#df
+
+<--- +
+<--- $qXfer:memory-map:read+;QNonStop+#cd
+```
+------------------------------------------------------------
+
+## 2 Request/Response
+
+[https://sourceware.org/gdb/current/onlinedocs/gdb.html/Packets.html#index-vMustReplyEmpty-packet](https://sourceware.org/gdb/current/onlinedocs/gdb.html/Packets.html#index-vMustReplyEmpty-packet)
+
+The correct reply to an unknown `v` packet is to return the empty string, however, some older versions of gdbserver would incorrectly return `OK` for unknown `v` packets.
+
+The `vMustReplyEmpty` is used as a feature test to check how gdbserver handles unknown packets, it is important that this packet be handled in the same way as other unknown `v` packets. If this packet is handled differently to other unknown `v` packets then it is possible that GDB may run into problems in other areas, specifically around use of `vFile:setfs:`
+
+```
+---> $vMustReplyEmpty#3a
+<--- +
+<--- $#00
+---> +
+```
+
+------------------------------------------------------------
+
+## 3 Request/Response
+
+Set thread for subsequent operations (‘m’, ‘M’, ‘g’, ‘G’, et.al.):
+[https://sourceware.org/gdb/onlinedocs/gdb/Packets.html#index-H-packet](https://sourceware.org/gdb/onlinedocs/gdb/Packets.html#index-H-packet)
+
+```
+---> $Hg0#df
+<--- +
+<--- $OK#9a
+---> +
+```
+
+------------------------------------------------------------
+
+## 4 Request/Response
+
+[https://sourceware.org/gdb/current/onlinedocs/gdb.html/General-Query-Packets.html#index-QNonStop-packet](https://sourceware.org/gdb/current/onlinedocs/gdb.html/General-Query-Packets.html#index-QNonStop-packet)
+
+Enter non-stop (‘QNonStop:1’) mode. See [Remote Non-Stop](https://sourceware.org/gdb/current/onlinedocs/gdb.html/Remote-Non_002dStop.html#Remote-Non_002dStop), for more information.
+
+```
+--> $QNonStop:1#8d
+<--- +
+<--- $OK#9a
+---> +
+```
+
+------------------------------------------------------------
+
+## 5 Request/Response
+
+[https://sourceware.org/gdb/onlinedocs/gdb/General-Query-Packets.html#index-qfThreadInfo-packet](https://sourceware.org/gdb/onlinedocs/gdb/General-Query-Packets.html#index-qfThreadInfo-packet)
+
+Start to obtain a list of all active thread IDs from the target
+
+```
+---> $qfThreadInfo#bb
+<--- +
+---> $m1#9e
+---> +
+```
+
+------------------------------------------------------------
+
+## 6 Request/Response
+
+[https://sourceware.org/gdb/onlinedocs/gdb/General-Query-Packets.html#index-qfThreadInfo-packet](https://sourceware.org/gdb/onlinedocs/gdb/General-Query-Packets.html#index-qfThreadInfo-packet)
+
+Continue to obtain a list of all active thread IDs from the target.
+‘l’ (lower case letter ‘L’) denotes end of list.
+
+```
+---> $qsThreadInfo#c8
+<--- +
+<--- $l#6c
+---> +
+```
+
+------------------------------------------------------------
+
+## 7 Request/Response
+
+ [https://sourceware.org/gdb/onlinedocs/gdb/General-Query-Packets.html#index-qAttached-packet](https://sourceware.org/gdb/onlinedocs/gdb/General-Query-Packets.html#index-qAttached-packet)
+
+Return an indication of whether the remote server attached to an existing process or created a new process
+
+```
+---> $qAttached#8f
+<--- +
+<--- $1#31
+---> +
+```
+
+------------------------------------------------------------
+
+## 8 Request/Response
+
+[https://sourceware.org/gdb/onlinedocs/gdb/Tracepoint-Packets.html#index-qTStatus-packet](https://sourceware.org/gdb/onlinedocs/gdb/Tracepoint-Packets.html#index-qTStatus-packet)
+
+Ask the stub if there is a trace experiment running right now.
+
+```
+---> $qTStatus#49
+<--- +
+<--- $#00
+---> +
+```
+
+------------------------------------------------------------
+
+## 9 Request/Response
+
+[https://sourceware.org/gdb/onlinedocs/gdb/Packets.html#index-_003f-packet](https://sourceware.org/gdb/onlinedocs/gdb/Packets.html#index-_003f-packet)
+
+This is sent when connection is first established to query the reason the target halted.
+
+```
+---> $?#3f
+<--- +
+<--- OK#9a
+---> +
+```
+
+------------------------------------------------------------
+
+## 10 Request/Response
+
+[https://sourceware.org/gdb/onlinedocs/gdb/Packets.html#index-vCont_003f-packet](https://sourceware.org/gdb/onlinedocs/gdb/Packets.html#index-vCont_003f-packet)
+
+Request a list of actions supported by the ‘vCont’ packet.
+
+```
+---> $vCont?#49
+<--- +
+<--- $vCont;c;t;#92
+---> +
+```
+
+------------------------------------------------------------
+
+## 11 Request/Response
+
+[https://sourceware.org/gdb/onlinedocs/gdb/Packets.html#index-vCont-packet](https://sourceware.org/gdb/onlinedocs/gdb/Packets.html#index-vCont-packet)
+
+Resume the inferior, specifying different actions for each thread.
+* `c` Continue.
+* `C sig` Continue with signal sig. The signal sig should be two hex digits.
+* `s` Step.
+* `S sig` Step with signal sig. The signal sig should be two hex digits.
+* **`t` Stop.**
+
+==> STOP the application
+==> gdb-stub sends status packet "%..." when STOP is executed
+
+```
+---> $vCont;t:1#24
+<--- +
+<--- $OK#9a
+---> +
+```
+
+------------------------------------------------------------
+
+## 12 Notification Stop
+
+[https://sourceware.org/gdb/current/onlinedocs/gdb.html/Notification-Packets.html#Notification-Packets](https://sourceware.org/gdb/current/onlinedocs/gdb.html/Notification-Packets.html#Notification-Packets)
+
+The GDB remote serial protocol includes notifications, packets that require no acknowledgment.
+
+After receiving a notification, GDB shall acknowledge it by sending a ack packet as a regular, synchronous request to the stub. Such acknowledgment is not required to happen immediately, as GDB is permitted to send other, unrelated packets to the stub first, which the stub should process normally.
+
+```
+<--- %Stop:T00thread:1;#b2
+```
+
+------------------------------------------------------------
+
+## 13 Request/Response
+
+[https://sourceware.org/gdb/onlinedocs/gdb/General-Query-Packets.html#index-qSymbol-packet](https://sourceware.org/gdb/onlinedocs/gdb/General-Query-Packets.html#index-qSymbol-packet)
+
+Notify the target that GDB is prepared to serve symbol lookup requests:
+* 'OK' -> The target does not need to look up any (more) symbols
+
+```
+---> $qSymbol::#5b
+<--- +
+<--- $OK#9a
+---> +
+```
+
+------------------------------------------------------------
+
+## 14 Acknowledge for Stop-Notification (12)
+
+[https://sourceware.org/gdb/current/onlinedocs/gdb.html/Packets.html#index-vStopped-packet](https://sourceware.org/gdb/current/onlinedocs/gdb.html/Packets.html#index-vStopped-packet)
+
+
+
+```
+---> $vStopped#55
+<--- +
+<--- $OK#9a
+---> +
+```
+
+------------------------------------------------------------
+
+## 15 Request/Response
+
+[https://sourceware.org/gdb/onlinedocs/gdb/Packets.html#index-H-packet](https://sourceware.org/gdb/onlinedocs/gdb/Packets.html#index-H-packet)
+
+Set thread for subsequent operations (‘m’, ‘M’, ‘g’, ‘G’, et.al.).
+Use ‘g’ for other operations.
+
+
+```
+---> $Hg1#e0
+<--- +
+<--- $OK#9a
+---> +
+```
+
+------------------------------------------------------------
+
+## 16 Request/Response
+
+[https://sourceware.org/gdb/onlinedocs/gdb/Packets.html#index-g-packet](https://sourceware.org/gdb/onlinedocs/gdb/Packets.html#index-g-packet)
+
+Read general registers (used on gdb command load)
+
+```
+---> $g#67
+<--- +
+<--- $000000000000000000000000000000000000000000000000000000000000000000000000000000#a0
+--> +
+```
+
+oder:
+
+```
+---> $g#67
+<--- +
+<--- $0*j#c4
+---> +
+```
+
+------------------------------------------------------------
+
+## 17 Request/Response
+
+[https://sourceware.org/gdb/onlinedocs/gdb/Packets.html#index-vCont-packet](https://sourceware.org/gdb/onlinedocs/gdb/Packets.html#index-vCont-packet)
+
+Resume the inferior, specifying different actions for each thread.
+* `c` Continue.
+* `C sig` Continue with signal sig. The signal sig should be two hex digits.
+* `s` Step.
+* `S sig` Step with signal sig. The signal sig should be two hex digits.
+* **`t` Stop.**
+
+```
+---> $vCont;c#a8
+<--- +
+<--- $OK#9a
+---> +
+```
--- /dev/null
+
+# GDB-Stub Protocol Break
+
+* `--->` Request or Acknowledge from *avr-gdb* to *gdb-stub* (in µC)
+* `<---` Response or Notification from *gdb-stub* (in µC) to *avr-gdb*
+
+## 1 Notification/Acknowledge
+
+[https://sourceware.org/gdb/current/onlinedocs/gdb.html/Notification-Packets.html#Notification-Packets](https://sourceware.org/gdb/current/onlinedocs/gdb.html/Notification-Packets.html#Notification-Packets)
+
+The GDB remote serial protocol includes notifications, packets that require no acknowledgment.
+
+After receiving a notification, GDB shall acknowledge it by sending a ack packet as a regular, synchronous request to the stub. Such acknowledgment is not required to happen immediately, as GDB is permitted to send other, unrelated packets to the stub first, which the stub should process normally.
+
+```
+<--- %Stop:T00thread:1;#b2
+---> $vStopped#55
+<--- +$OK#9a
+---> +
+```
+
+## 2 Request/Response
+
+[https://sourceware.org/gdb/onlinedocs/gdb/Packets.html#index-g-packet](https://sourceware.org/gdb/onlinedocs/gdb/Packets.html#index-g-packet)
+
+Read general registers (used on gdb command load)
+
+
+```
+---> $g#67
+<--- +
+<--- $a0000000000000000000000000000000000120008601000101001000fe100770a03810e0010000#d3
+---> +
+```
+
+Response format see [https://sourceware.org/git/?p=binutils-gdb.git;a=blob;f=gdb/avr-tdep.c;h=1e39f851bac4e5e335f0a271415cbba5822fd6b0;hb=HEAD#l208](https://sourceware.org/git/?p=binutils-gdb.git;a=blob;f=gdb/avr-tdep.c;h=1e39f851bac4e5e335f0a271415cbba5822fd6b0;hb=HEAD#l208):
+
+```
+ $a0000000000000000000000000000000000120008601000101001000fe100770a03810e0010000
+ ^ ^ ^ ^ ^ ^ ^
+ | | | | | | |
+ r0| | | | | |
+ r1| | | | |
+ r2 ................................................. | | | |
+ r31| | |
+ SREG| |
+ SP |
+ PC7:0, PC15:8, PC23:16, PC31:24
+```
+
+* Register values: r0=0xa0, r1=0, ... , r17=0x01, r18=0x20, ... r31=0x77
+* Status register: SREG = 0x0a ()
+* Stack pointer: SP = 0x1803
+* Program counter: PC = 0x000001e0
+
+
+## 3 Request/Response
+
+[https://sourceware.org/gdb/onlinedocs/gdb/General-Query-Packets.html#index-qfThreadInfo-packet](https://sourceware.org/gdb/onlinedocs/gdb/General-Query-Packets.html#index-qfThreadInfo-packet)
+
+Start to obtain a list of all active thread IDs from the target
+
+```
+---> $qfThreadInfo#bb
+<--- +
+<--- $m1;2#0b
+---> +
+```
+
+## 4 Request/Response
+
+[https://sourceware.org/gdb/onlinedocs/gdb/General-Query-Packets.html#index-qfThreadInfo-packet](https://sourceware.org/gdb/onlinedocs/gdb/General-Query-Packets.html#index-qfThreadInfo-packet)
+
+Continue to obtain a list of all active thread IDs from the target.
+‘l’ (lower case letter ‘L’) denotes end of list.
+
+```
+---> $qsThreadInfo#c8
+<--- +
+<--- $l#6c
+---> +
+```
+++ /dev/null
-# GDB-Stub Protocol
-
-* `--->` Request from *avr-gdb* to *gdb-stub* (in µC)
-* `<---` Response from *gdb-stub* (in µC) to *avr-gdb*
-
-## 1 Request/Response
-
-[https://sourceware.org/gdb/onlinedocs/gdb/General-Query-Packets.html#index-qSupported-packet](https://sourceware.org/gdb/onlinedocs/gdb/General-Query-Packets.html#index-qSupported-packet)
-
-
-Tell the remote stub about features supported by GDB, and query the stub for features it supports.
-
-```
----> +
----> $qSupported:multiprocess+;swbreak+;hwbreak+;qRelocInsn+;fork-events+;vfork-events+;exec-events+;vContSupported+;QThreadEvents+;no-resumed+#df
-
-<--- +
-<--- $qXfer:memory-map:read+;QNonStop+#cd
-```
-------------------------------------------------------------
-
-## 2 Request/Response
-
-[https://sourceware.org/gdb/current/onlinedocs/gdb.html/Packets.html#index-vMustReplyEmpty-packet](https://sourceware.org/gdb/current/onlinedocs/gdb.html/Packets.html#index-vMustReplyEmpty-packet)
-
-The correct reply to an unknown `v` packet is to return the empty string, however, some older versions of gdbserver would incorrectly return `OK` for unknown `v` packets.
-
-The `vMustReplyEmpty` is used as a feature test to check how gdbserver handles unknown packets, it is important that this packet be handled in the same way as other unknown `v` packets. If this packet is handled differently to other unknown `v` packets then it is possible that GDB may run into problems in other areas, specifically around use of `vFile:setfs:`
-
-```
----> $vMustReplyEmpty#3a
-<--- +
-<--- $#00
----> +
-```
-
-------------------------------------------------------------
-
-## 3 Request/Response
-
-Set thread for subsequent operations (‘m’, ‘M’, ‘g’, ‘G’, et.al.):
-[https://sourceware.org/gdb/onlinedocs/gdb/Packets.html#index-H-packet](https://sourceware.org/gdb/onlinedocs/gdb/Packets.html#index-H-packet)
-
-```
----> $Hg0#df
-<--- +
-<--- $OK#9a
----> +
-```
-
-------------------------------------------------------------
-
-## 4 Request/Response
-
-[https://sourceware.org/gdb/current/onlinedocs/gdb.html/General-Query-Packets.html#index-QNonStop-packet](https://sourceware.org/gdb/current/onlinedocs/gdb.html/General-Query-Packets.html#index-QNonStop-packet)
-
-Enter non-stop (‘QNonStop:1’) mode. See [Remote Non-Stop](https://sourceware.org/gdb/current/onlinedocs/gdb.html/Remote-Non_002dStop.html#Remote-Non_002dStop), for more information.
-
-```
---> $QNonStop:1#8d
-<--- +
-<--- $OK#9a
----> +
-```
-
-------------------------------------------------------------
-
-## 5 Request/Response
-
-[https://sourceware.org/gdb/onlinedocs/gdb/General-Query-Packets.html#index-qfThreadInfo-packet](https://sourceware.org/gdb/onlinedocs/gdb/General-Query-Packets.html#index-qfThreadInfo-packet)
-
-Start to obtain a list of all active thread IDs from the target
-
-```
----> $qfThreadInfo#bb
-<--- +
----> $m1#9e
----> +
-```
-
-------------------------------------------------------------
-
-## 6 Request/Response
-
-[https://sourceware.org/gdb/onlinedocs/gdb/General-Query-Packets.html#index-qfThreadInfo-packet](https://sourceware.org/gdb/onlinedocs/gdb/General-Query-Packets.html#index-qfThreadInfo-packet)
-
-Continue to obtain a list of all active thread IDs from the target
-
-```
----> $qsThreadInfo#c8
-<--- +
-<--- $l#6c
----> +
-```
-
-------------------------------------------------------------
-
-## 7 Request/Response
-
- [https://sourceware.org/gdb/onlinedocs/gdb/General-Query-Packets.html#index-qAttached-packet](https://sourceware.org/gdb/onlinedocs/gdb/General-Query-Packets.html#index-qAttached-packet)
-
-Return an indication of whether the remote server attached to an existing process or created a new process
-
-```
----> $qAttached#8f
-<--- +
-<--- $1#31
----> +
-```
-
-------------------------------------------------------------
-
-## 8 Request/Response
-
-[https://sourceware.org/gdb/onlinedocs/gdb/Tracepoint-Packets.html#index-qTStatus-packet](https://sourceware.org/gdb/onlinedocs/gdb/Tracepoint-Packets.html#index-qTStatus-packet)
-
-Ask the stub if there is a trace experiment running right now.
-
-```
----> $qTStatus#49
-<--- +
-<--- $#00
----> +
-```
-
-------------------------------------------------------------
-
-## 9 Request/Response
-
-[https://sourceware.org/gdb/onlinedocs/gdb/Packets.html#index-_003f-packet](https://sourceware.org/gdb/onlinedocs/gdb/Packets.html#index-_003f-packet)
-
-This is sent when connection is first established to query the reason the target halted.
-
-```
----> $?#3f
-<--- +
-<--- OK#9a
----> +
-```
-
-------------------------------------------------------------
-
-## 10 Request/Response
-
-[https://sourceware.org/gdb/onlinedocs/gdb/Packets.html#index-vCont_003f-packet](https://sourceware.org/gdb/onlinedocs/gdb/Packets.html#index-vCont_003f-packet)
-
-Request a list of actions supported by the ‘vCont’ packet.
-
-```
----> $vCont?#49
-<--- +
-<--- $vCont;c;t;#92
----> +
-```
-
-------------------------------------------------------------
-
-## 11 Request/Response
-
-[https://sourceware.org/gdb/onlinedocs/gdb/Packets.html#index-vCont-packet](https://sourceware.org/gdb/onlinedocs/gdb/Packets.html#index-vCont-packet)
-
-Resume the inferior, specifying different actions for each thread.
-* `c` Continue.
-* `C sig` Continue with signal sig. The signal sig should be two hex digits.
-* `s` Step.
-* `S sig` Step with signal sig. The signal sig should be two hex digits.
-* **`t` Stop.**
-
-==> STOP the application
-==> gdb-stub sends status packet "%..." when STOP is executed
-
-```
----> $vCont;t:1#24
-<--- +
-<--- $OK#9a
----> +
-```
-
-------------------------------------------------------------
-
-## 12 Notification Stop
-
-[https://sourceware.org/gdb/current/onlinedocs/gdb.html/Notification-Packets.html#Notification-Packets](https://sourceware.org/gdb/current/onlinedocs/gdb.html/Notification-Packets.html#Notification-Packets)
-
-The GDB remote serial protocol includes notifications, packets that require no acknowledgment.
-
-After receiving a notification, GDB shall acknowledge it by sending a ack packet as a regular, synchronous request to the stub. Such acknowledgment is not required to happen immediately, as GDB is permitted to send other, unrelated packets to the stub first, which the stub should process normally.
-
-```
-<--- %Stop:T00thread:1;#b2
-```
-
-------------------------------------------------------------
-
-## 13 Request/Response
-
-[https://sourceware.org/gdb/onlinedocs/gdb/General-Query-Packets.html#index-qSymbol-packet](https://sourceware.org/gdb/onlinedocs/gdb/General-Query-Packets.html#index-qSymbol-packet)
-
-Notify the target that GDB is prepared to serve symbol lookup requests:
-* 'OK' -> The target does not need to look up any (more) symbols
-
-```
----> $qSymbol::#5b
-<--- +
-<--- $OK#9a
----> +
-```
-
-------------------------------------------------------------
-
-## 14 Acknowledge for Stop-Notification (12)
-
-[https://sourceware.org/gdb/current/onlinedocs/gdb.html/Packets.html#index-vStopped-packet](https://sourceware.org/gdb/current/onlinedocs/gdb.html/Packets.html#index-vStopped-packet)
-
-
-
-```
----> $vStopped#55
-<--- +
-<--- $OK#9a
----> +
-```
-
-------------------------------------------------------------
-
-## 15 Request/Response
-
-[https://sourceware.org/gdb/onlinedocs/gdb/Packets.html#index-H-packet](https://sourceware.org/gdb/onlinedocs/gdb/Packets.html#index-H-packet)
-
-Set thread for subsequent operations (‘m’, ‘M’, ‘g’, ‘G’, et.al.).
-Use ‘g’ for other operations.
-
-
-```
----> $Hg1#e0
-<--- +
-<--- $OK#9a
----> +
-```
-
-------------------------------------------------------------
-
-## 16 Request/Response
-
-[https://sourceware.org/gdb/onlinedocs/gdb/Packets.html#index-g-packet](https://sourceware.org/gdb/onlinedocs/gdb/Packets.html#index-g-packet)
-
-Read general registers (used on gdb command load)
-
-```
----> $g#67
-<--- +
-<--- $000000000000000000000000000000000000000000000000000000000000000000000000000000#a0
---> +
-```
-
-oder:
-
-```
----> $g#67
-<--- +
-<--- $0*j#c4
----> +
-```
-
-------------------------------------------------------------
-
-## 17 Request/Response
-
-[https://sourceware.org/gdb/onlinedocs/gdb/Packets.html#index-vCont-packet](https://sourceware.org/gdb/onlinedocs/gdb/Packets.html#index-vCont-packet)
-
-Resume the inferior, specifying different actions for each thread.
-* `c` Continue.
-* `C sig` Continue with signal sig. The signal sig should be two hex digits.
-* `s` Step.
-* `S sig` Step with signal sig. The signal sig should be two hex digits.
-* **`t` Stop.**
-
-```
----> $vCont;c#a8
-<--- +
-<--- $OK#9a
----> +
-```
struct App app;
void init () {
+ DDRC = (1 << DDC4) | (1 << DDC3) | (1 << DDC2);
+ PORTC = 0;
+
memset((void *)&app, 0, sizeof(app));
UCSR0B |= (1 << RXCIE0);
UCSR1B |= (1 << RXCIE1);
sei();
}
- void __attribute__((optimize("O0"))) main () {
+ void __attribute__((optimize("Og"))) main () {
+
if (app.event) {
static uint16_t cnt = 0;
if (app.event & 0x01) {
-#define blgdb_init() asm volatile ( "jmp 0x7002" )
-#define blgdb_main() asm volatile ( "call 0x7004 \n ret \n" )
-#define blgdb_stop() asm volatile ( "call 0x7006 \n ret \n" )
-#define blgdb_handleUartIsrByte(b) asm volatile ( "jmp 0x7008" )
-#define blgdb_printWelcomeMessage() asm volatile ( "jmp 0x700a" )
-#define blgdb_putchar(c) ( (*(( void (*)(uint8_t) ) (0x700c / 2) )) (c) )
-#define blgdb_puts(s) ( (*(( void (*)(const char *) ) (0x700e / 2) )) (s) );
-#define blgdb_putUint8Hex(value) ( (*(( void (*)(uint8_t) ) (0x7010 / 2) )) (value) )
-#define blgdb_memputc(p) ( (*(( void (*)(PGM_P) ) (0x7012 / 2) )) (p) )
-#define blgdb_memputs(p) ( (*(( void (*)(PGM_P) ) (0x7014 / 2) )) (p) )
-#define blgdb_serve500msTimer() asm volatile ( "jmp 0x7016" )
+#define blgdb_init() asm volatile ( "jmp 0xe002" )
+#define blgdb_main() asm volatile ( "call 0xe004 \n ret \n" )
+#define blgdb_stop() asm volatile ( "call 0xe006 \n ret \n" )
+#define blgdb_handleUartIsrByte(b) asm volatile ( "jmp 0xe008" )
+#define blgdb_printWelcomeMessage() asm volatile ( "jmp 0xe00a" )
+#define blgdb_putchar(c) ( (*(( void (*)(uint8_t) ) (0xe00c / 2) )) (c) )
+#define blgdb_puts(s) ( (*(( void (*)(const char *) ) (0xe00e / 2) )) (s) );
+#define blgdb_putUint8Hex(value) ( (*(( void (*)(uint8_t) ) (0xe010 / 2) )) (value) )
+#define blgdb_memputc(p) ( (*(( void (*)(PGM_P) ) (0xe012 / 2) )) (p) )
+#define blgdb_memputs(p) ( (*(( void (*)(PGM_P) ) (0xe014 / 2) )) (p) )
+#define blgdb_serve500msTimer() asm volatile ( "jmp 0xe016" )
namespace blgdb {
void __attribute__ ((naked)) bootloaderStart () {
asm volatile (
"__bootloader_start: \n"
- "rjmp __bootloader_start_from_reset \n" // 0x7000
- "rjmp __bootloader_start_from_app \n" // 0x7002
- "rjmp __gdb_main \n" // 0x7004
- "rjmp __gdb_stopApplication \n" // 0x7006
- "rjmp __vector_jmpTableIsrUsart1 \n" // 0x7008
- "rjmp __print_welcome_message \n" // 0x700a
- "rjmp __bootloader_printChar \n" // 0x700c
- "rjmp __bootloader_puts \n" // 0x701e
- "rjmp __bootloader_put_uint_8_hex \n" // 0x7010
- "rjmp __bootloader_memputc \n" // 0x7012
- "rjmp __bootloader_memputs \n" // 0x7014
- "rjmp __gdb_serve500msTimer \n" // 0x7016
+ "rjmp __bootloader_start_from_reset \n" // 0xe000
+ "rjmp __bootloader_start_from_app \n" // 0xe002
+ "rjmp __gdb_main \n" // 0xe004
+ "rjmp __gdb_stopApplication \n" // 0xe006
+ "rjmp __vector_jmpTableIsrUsart1 \n" // 0xe008
+ "rjmp __print_welcome_message \n" // 0xe00a
+ "rjmp __bootloader_printChar \n" // 0xe00c
+ "rjmp __bootloader_puts \n" // 0xe01e
+ "rjmp __bootloader_put_uint_8_hex \n" // 0xe010
+ "rjmp __bootloader_memputc \n" // 0xe012
+ "rjmp __bootloader_memputs \n" // 0xe014
+ "rjmp __gdb_serve500msTimer \n" // 0xe016
);
}
#ifdef SIMAVR
main();
#else
+ setLedGreen(1); setLedOrange(0); setLedRed(0);
asm volatile (
"jmp 0x0000" // start application
);
asm volatile (
"__gdb_main: \n"
);
+
+ static uint16_t cnt = 0;
+
+ if (cnt < 0x2000) {
+ cnt ++;
+ } else {
+ toggleLedOrange();
+ cnt = 0;
+ }
+
struct gdb::Gdb *pgdb = GDB_PTR;
if (pgdb->ctrl.interrupt) {
pgdb->ctrl.interrupt = 0;
asm volatile (
"__gdb_stopApplication: \n"
"push r25 \n" // save r25 (used for address of gdb::gdb.breakpoint)
- "lds r25, 0x08fc \n" // gdb.status
+ "lds r25, 0x10fc \n" // gdb.status
"andi r25, 0x01 \n" // gdb.status.isConnected
"breq __gdb_stopApplication_end \n"
"in r25, 0x3f \n" // SFR -> r25
uint8_t b = pgm_read_byte(0x0000); // check if app in non bootloader flash
if (b != 0xff) {
- setLedOrange(0);
- setLedGreen(1);
struct gdb::Gdb *pgdb = GDB_PTR;
pgdb->status.isAppStarted = 1;
pgdb->status.isStopped = 0;
}
void putStatus (int8_t uart) {
- // struct gdb::Gdb *pgdb = GDB_PTR;
- // putln(uart);
- // printChar(uart, 'S');
- // printChar(uart, '-');
- // printChar(uart, pgdb->status.isAppStarted ? 'A' : 'a');
- // printChar(uart, pgdb->status.isStopped ? 'S' : 's');
- // printChar(uart, pgdb->status.isConnected ? 'C' : 'x');
- // printChar(uart, pgdb->status.isBreakpointValid ? 'B' : 'b');
- // putln(uart);
-
struct gdb::Gdb *pgdb = GDB_PTR;
putln(uart);
printChar(uart, 'S');
printChar(uart, '-');
- putUint8Hex(0, (uint8_t)(((uint16_t)(void *)&pgdb->ctrl) >> 8) );
- putUint8Hex(0, (uint8_t)((uint16_t)(void *)&pgdb->ctrl) );
+ printChar(uart, pgdb->status.isAppStarted ? 'A' : 'a');
+ printChar(uart, pgdb->status.isStopped ? 'S' : 's');
+ printChar(uart, pgdb->status.isConnected ? 'C' : 'x');
+ printChar(uart, pgdb->status.isBreakpointValid ? 'B' : 'b');
putln(uart);
}
} else if (pgdb->ctrl.stop) {
pgdb->ctrl.stop = 0;
- if (!pgdb->status.isStopped) {
+ if (!pgdb->status.isStopped && pgdb->buffer.state == idle) {
if (pgdb->status.isAppStarted) {
#ifdef GDB_DEBUG_UART
printdbgln(GDB_DEBUG_ID_STOP_APPLICATION);
// https://sourceware.org/gdb/onlinedocs/gdb/Packets.html#index-_003f-packet
// This is sent when connection is first established to query the reason the target halted.
if (pgdb->status.isAppStarted && pgdb->status.isStopped) {
- xputsStop();
+ // xputsStop();
+ pgdb->ctrl.stop = 1; // send STOP notification
} else {
xputsmem(gdb_OK);
}
// https://sourceware.org/gdb/onlinedocs/gdb/Packets.html#index-g-packet
// Read general registers (used on gdb command load)
xputc('$');
- for (i = 0; i < 78; i++) {
- xputc('0');
+ bootloader::putUart0Byte('B');
+ bootloader::putUart0Byte('-');
+ bootloader::putUint8Hex(0, pgdb->status.isBreakpointValid);
+ bootloader::putln(0);
+ if (pgdb->status.isBreakpointValid) {
+ for (uint8_t i = 0; i < 32; i++) {
+ xputUint8Hex(pgdb->breakpoint.regs[i]);
+ }
+ xputUint8Hex(pgdb->breakpoint.sfr);
+ xputUint8Hex((uint8_t)(pgdb->breakpoint.sp));
+ xputUint8Hex((uint8_t)(pgdb->breakpoint.sp >> 8));
+ xputUint8Hex((uint8_t)(pgdb->breakpoint.pc));
+ xputUint8Hex((uint8_t)(pgdb->breakpoint.pc >> 8));
+ xputUint8Hex(0); // PC23:16
+ xputUint8Hex(0); // PC31:24
+ } else {
+ for (i = 0; i < 78; i++) {
+ xputc('0');
+ }
+ // or "$0*j#"
}
- // or "$0*j#"
xputc('#');
return;
}
// case 3: gdb.ctrl.continueInterrupts = 1; break;
// }
bootloader::putStatus(0);
- pgdb->ctrl.stop = 1;
+ if (pgdb->status.isAppStarted) {
+ pgdb->ctrl.interrupt = 1;
+ } else {
+ pgdb->ctrl.stop = 1;
+ }
xputsmem(gdb_OK);
return;
blgdb::init();
app::init();
while (1) {
+
blgdb::main();
app::main();
}
projects / nano-x.git / commitdiff