Btree Module on stm32

[Drako]

Hi,

I tried to implement the Btree module in a custom board with an stm32F765.

When in implement the line
"#define MICROPY_PY_BTREE (1)"
into the mpconfigboard.h, I get an error when creating the firmware:

"In file included from ../../py/objmodule.h:29:0,
from ../../py/objmodule.c:30:
../../py/objmodule.c:221:19: error: 'MP_QSTR_btree' undeclared here (not in a function)
{ MP_ROM_QSTR(MP_QSTR_btree), MP_ROM_PTR(&mp_module_btree) },
^
../../py/obj.h:92:56: note: in definition of macro 'MP_OBJ_NEW_QSTR'
#define MP_OBJ_NEW_QSTR(qst) ((mp_obj_t)((((mp_uint_t)(qst)) << 2) | 2))
^
../../py/objmodule.c:221:7: note: in expansion of macro 'MP_ROM_QSTR'
{ MP_ROM_QSTR(MP_QSTR_btree), MP_ROM_PTR(&mp_module_btree) },
^"

I used the acutal master branch of micropython (MicroPython v1.9.3-411-g6db0cb78)

I also tried to activate the module in the makefile.
This lead to a different error message, which lead me to also activate :
#define MICROPY_STREAMS_POSIX_API (1)

which ultimatly lead to another error when creating the firmware.

Is this modul working for an stm32 MCU or only for ESP and UNIX ports of micropython?

[dhylands]

When you make a change like that you should do a clean and then rebuild. Otherwise you run into water errors like you're seeing.

[Drako]

Hi,

good advice, but I didn't get to compile the firmware for an stm32 port with the BTREE module enabled.

When I add the define for BTREE in the mpconfigboard.h, I get the following error:
build-mcCPU_F7V01/py/objmodule.o:(.rodata.mp_builtin_module_table+0xc4): undefined reference to `mp_module_btree'

When I add a define for BTREE in the make file (like in an esp port), I get the following error:
../../extmod/modbtree.c:324:5: error: 'mp_stream_posix_read' undeclared here (not in a function)
mp_stream_posix_read,
^
../../extmod/modbtree.c:325:5: error: 'mp_stream_posix_write' undeclared here (not in a function)
mp_stream_posix_write,
^
../../extmod/modbtree.c:326:5: error: 'mp_stream_posix_lseek' undeclared here (not in a function)
mp_stream_posix_lseek,
^
../../extmod/modbtree.c:327:5: error: 'mp_stream_posix_fsync' undeclared here (not in a function)
mp_stream_posix_fsync
^

When I then add a define for the Posix api in the mpconfigport.h (#define MICROPY_STREAMS_POSIX_API (1)) and add the posix_helpers.c to the source in the makefile, I get to the following error:
build-mcCPU_F7V01/posix_helpers.o: In function `m_malloc':
posix_helpers.c:(.text.m_malloc+0x0): multiple definition of `m_malloc'
build-mcCPU_F7V01/py/malloc.o:malloc.c:(.text.m_malloc+0x0): first defined here
build-mcCPU_F7V01/posix_helpers.o: In function `m_free':
posix_helpers.c:(.text.m_free+0x0): multiple definition of `m_free'
build-mcCPU_F7V01/py/malloc.o:malloc.c:(.text.m_free+0x0): first defined here
build-mcCPU_F7V01/posix_helpers.o: In function `m_realloc':
posix_helpers.c:(.text.m_realloc+0x0): multiple definition of `m_realloc'
build-mcCPU_F7V01/py/malloc.o:malloc.c:(.text.m_realloc+0x0): first defined here
build-mcCPU_F7V01/extmod/modbtree.o: In function `mod_btree_open':
modbtree.c:(.text.mod_btree_open+0x54): undefined reference to `__errno'
build-mcCPU_F7V01/extmod/modbtree.o: In function `btree_seq':
modbtree.c:(.text.btree_seq+0x2c): undefined reference to `__errno'
build-mcCPU_F7V01/extmod/modbtree.o: In function `btree_iternext':
modbtree.c:(.text.btree_iternext+0x56): undefined reference to `__errno'
build-mcCPU_F7V01/extmod/modbtree.o: In function `btree_subscr':
modbtree.c:(.text.btree_subscr+0x78): undefined reference to `__errno'
build-mcCPU_F7V01/extmod/modbtree.o: In function `btree_get.part.0':
modbtree.c:(.text.unlikely.btree_binary_op.part.1+0x2): undefined reference to `__errno'
build-mcCPU_F7V01/lib/berkeley-db-1.xx/btree/bt_close.o:bt_close.c:(.text.__bt_sync+0x1a): more undefined references to `__errno' follow

Before each build I did a make clean.

Long question short, did anyone of you get the BTREE module to run in an stm32 port, because in the doc of the pyboard the module is listed?

[pythoncoder]

I don't know the status of the official port but the Loboris port claims to support it: see this post.

[oserror]

I know this is an old thread but I was able to build btree support into the Pyboard 1.1 firmware.

If this interests you, make the following changes to the code:

Change the target board to build for (pretty obvious but here it is) in the Makefile:

Code: Select all

BOARD ?= PYBV11

Copy posix_helpers.c from the esp8266 port. Add it to the Makefile in the SRC_C section, appending it to the list with a trailing backslash:

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posix_helpers.c \

Also pretty obviously, add btree module to mpconfigport.mk:

Code: Select all

MICROPY_PY_BTREE = 1

mpconfigport.h: add this line for ssize_t, off_t (and probably others):

Code: Select all

#include <sys/types.h>

also add a #define to mpconfigport.h:

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#define MICROPY_STREAMS_POSIX_API (1)

add this to the end of mphalport.c (fixes __errno reference):

Code: Select all

extern int mp_stream_errno;
int *__errno() {
    return &mp_stream_errno;
}

Thanks to @Drako for his informative post. I had some spare time over the weekend and I did a lot of grep-ing on the code to find the missing references. I have a program reading from an existing btree database right now and it's working splendidly.