Please see the new forum at
https://forum.micropython.org/
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>>> import c_sample
>>> def foo():
... print('foo called')
...
>>> c_sample.set_callback(foo)
>>> c_sample.call_callback()
foo calledCode: Select all
STATIC mp_obj_t c_sample_call_callback(void) {
vstr_t vstr;
vstr_init_fixed_buf(&vstr, 32, "some_string");
mp_obj_t obj = mp_obj_new_str_from_vstr(&mp_type_bytes, &vstr);
return mp_call_function_1(MP_STATE_PORT(c_sample_callback_obj),obj);
}Code: Select all
MicroPython 84405ef-dirty on 2016-02-29; linux version
Use Ctrl-D to exit, Ctrl-E for paste mode
>>> def a(b):
... print(b)
...
...
...
>>> import c_sample
>>> c_sample.set_callback(a)
>>> c_sample.call_callback
<function>
Code: Select all
>>> c_sample.call_callbackCode: Select all
>>> c_sample.call_callback()Ah yes. Also known as the "don't try to program when it's 1AM and your eyes can't even focus on the screen"dhylands wrote:You're missing the parenthesis when you're trying to call the call_callback function
Code: Select all
>>> c_sample.call_callback()
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
MemoryError: memory allocation failed, allocating 1 bytes
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STATIC mp_obj_t c_sample_call_callback(void) {
mp_obj_t obj = mp_obj_new_str("some_string", strlen("some_string"), false);
return mp_call_function_1(MP_STATE_PORT(c_sample_callback_obj), obj);
}Code: Select all
>>> def foo(b):
... print(b)
...
>>> import c_sample
>>> c_sample.set_callback(foo)
>>> c_sample.call_callback()
some_string
>>> Code: Select all
STATIC mp_obj_t c_sample_call_callback(void) {
vstr_t vstr;
vstr_init_len(&vstr, strlen("some_string"));
strcpy(vstr.buf, "some_string");
mp_obj_t obj = mp_obj_new_str_from_vstr(&mp_type_bytes, &vstr);
return mp_call_function_1(MP_STATE_PORT(c_sample_callback_obj), obj);
} Code: Select all
>>> def foo(b):
... print(b)
...
>>> import c_sample
>>> c_sample.set_callback(b)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
NameError: name 'b' is not defined
>>> c_sample.set_callback(foo)
>>> c_sample.call_callback()
b'some_string'You only need to modify mpconfigport.h to add the module. Once the module has been added you can add as many methods to the module that you want by just modifying c_sample.c (or whatever you call your module).cduran wrote:Could I add more C callbacks without modifying mpconfigport.h?
Wouldn't I also have to add the new callbacks to qstrdefsport.h?dhylands wrote:You only need to modify mpconfigport.h to add the module. Once the module has been added you can add as many methods to the module that you want by just modifying c_sample.c (or whatever you call your module).cduran wrote:Could I add more C callbacks without modifying mpconfigport.h?
By convention, I probably should have called the source modsample.c.