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esp8266/modpybspi: Use generic SPI helper methods to implement SPI.

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This commit is contained in:
Damien George 2016-09-01 15:10:27 +10:00
parent 0823c1baf8
commit 5863e15a23
2 changed files with 13 additions and 54 deletions
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66
esp8266/modpybspi.c
View File

@ -35,6 +35,7 @@
#include "py/runtime.h"
#include "py/stream.h"
#include "py/mphal.h"
#include "extmod/machine_spi.h"
typedef struct _pyb_spi_obj_t {
mp_obj_base_t base;
@ -46,7 +47,8 @@ typedef struct _pyb_spi_obj_t {
mp_hal_pin_obj_t miso;
} pyb_spi_obj_t;
STATIC void mp_hal_spi_transfer(pyb_spi_obj_t *self, size_t src_len, const uint8_t *src_buf, size_t dest_len, uint8_t *dest_buf) {
STATIC void mp_hal_spi_transfer(mp_obj_base_t *self_in, size_t src_len, const uint8_t *src_buf, size_t dest_len, uint8_t *dest_buf) {
pyb_spi_obj_t *self = (pyb_spi_obj_t*)self_in;
// only MSB transfer is implemented
uint32_t delay_half = 500000 / self->baudrate + 1;
for (size_t i = 0; i < src_len || i < dest_len; ++i) {
@ -154,69 +156,25 @@ STATIC mp_obj_t pyb_spi_init(size_t n_args, const mp_obj_t *args, mp_map_t *kw_a
}
MP_DEFINE_CONST_FUN_OBJ_KW(pyb_spi_init_obj, 1, pyb_spi_init);
STATIC mp_obj_t pyb_spi_read(size_t n_args, const mp_obj_t *args) {
pyb_spi_obj_t *self = MP_OBJ_TO_PTR(args[0]);
uint8_t write_byte = 0;
if (n_args == 3) {
write_byte = mp_obj_get_int(args[2]);
}
vstr_t vstr;
vstr_init_len(&vstr, mp_obj_get_int(args[1]));
mp_hal_spi_transfer(self, 1, &write_byte, vstr.len, (uint8_t*)vstr.buf);
return mp_obj_new_str_from_vstr(&mp_type_bytes, &vstr);
}
MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(pyb_spi_read_obj, 2, 3, pyb_spi_read);
STATIC mp_obj_t pyb_spi_readinto(size_t n_args, const mp_obj_t *args) {
pyb_spi_obj_t *self = MP_OBJ_TO_PTR(args[0]);
mp_buffer_info_t bufinfo;
mp_get_buffer_raise(args[1], &bufinfo, MP_BUFFER_WRITE);
uint8_t write_byte = 0;
if (n_args == 3) {
write_byte = mp_obj_get_int(args[2]);
}
mp_hal_spi_transfer(self, 1, &write_byte, bufinfo.len, (uint8_t*)bufinfo.buf);
return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(pyb_spi_readinto_obj, 2, 3, pyb_spi_readinto);
STATIC mp_obj_t pyb_spi_write(mp_obj_t self_in, mp_obj_t wr_buf_in) {
pyb_spi_obj_t *self = MP_OBJ_TO_PTR(self_in);
mp_buffer_info_t src_buf;
mp_get_buffer_raise(wr_buf_in, &src_buf, MP_BUFFER_READ);
mp_hal_spi_transfer(self, src_buf.len, (const uint8_t*)src_buf.buf, 0, NULL);
return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_2(pyb_spi_write_obj, pyb_spi_write);
STATIC mp_obj_t pyb_spi_write_readinto(mp_obj_t self_in, mp_obj_t wr_buf_in, mp_obj_t rd_buf_in) {
pyb_spi_obj_t *self = MP_OBJ_TO_PTR(self_in);
mp_buffer_info_t src_buf;
mp_get_buffer_raise(wr_buf_in, &src_buf, MP_BUFFER_READ);
mp_buffer_info_t dest_buf;
mp_get_buffer_raise(rd_buf_in, &dest_buf, MP_BUFFER_WRITE);
if (src_buf.len != dest_buf.len) {
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError, "buffers must be the same length"));
}
mp_hal_spi_transfer(self, src_buf.len, (const uint8_t*)src_buf.buf, dest_buf.len, (uint8_t*)dest_buf.buf);
return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_3(pyb_spi_write_readinto_obj, pyb_spi_write_readinto);
STATIC const mp_rom_map_elem_t pyb_spi_locals_dict_table[] = {
{ MP_ROM_QSTR(MP_QSTR_init), MP_ROM_PTR(&pyb_spi_init_obj) },
{ MP_ROM_QSTR(MP_QSTR_read), MP_ROM_PTR(&pyb_spi_read_obj) },
{ MP_ROM_QSTR(MP_QSTR_readinto), MP_ROM_PTR(&pyb_spi_readinto_obj) },
{ MP_ROM_QSTR(MP_QSTR_write), MP_ROM_PTR(&pyb_spi_write_obj) },
{ MP_ROM_QSTR(MP_QSTR_write_readinto), MP_ROM_PTR(&pyb_spi_write_readinto_obj) },
{ MP_ROM_QSTR(MP_QSTR_read), MP_ROM_PTR(&mp_machine_spi_read_obj) },
{ MP_ROM_QSTR(MP_QSTR_readinto), MP_ROM_PTR(&mp_machine_spi_readinto_obj) },
{ MP_ROM_QSTR(MP_QSTR_write), MP_ROM_PTR(&mp_machine_spi_write_obj) },
{ MP_ROM_QSTR(MP_QSTR_write_readinto), MP_ROM_PTR(&mp_machine_spi_write_readinto_obj) },
};
STATIC MP_DEFINE_CONST_DICT(pyb_spi_locals_dict, pyb_spi_locals_dict_table);
STATIC const mp_machine_spi_p_t pyb_spi_p = {
.transfer = mp_hal_spi_transfer,
};
const mp_obj_type_t pyb_spi_type = {
{ &mp_type_type },
.name = MP_QSTR_SoftSPI,
.print = pyb_spi_print,
.make_new = pyb_spi_make_new,
.protocol = &pyb_spi_p,
.locals_dict = (mp_obj_dict_t*)&pyb_spi_locals_dict,
};

1
esp8266/mpconfigport.h
View File

@ -63,6 +63,7 @@
#define MICROPY_PY_MACHINE (1)
#define MICROPY_PY_MACHINE_PULSE (1)
#define MICROPY_PY_MACHINE_I2C (1)
#define MICROPY_PY_MACHINE_SPI (1)
#define MICROPY_PY_WEBSOCKET (1)
#define MICROPY_PY_WEBREPL (1)
#define MICROPY_PY_WEBREPL_DELAY (20)