380 lines
14 KiB
C
380 lines
14 KiB
C
/*
|
|
* This file is part of the MicroPython project, http://micropython.org/
|
|
*
|
|
* The MIT License (MIT)
|
|
*
|
|
* Copyright (c) 2013-2018 Damien P. George
|
|
* Copyright (c) 2021,2022 Renesas Electronics Corporation
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
* THE SOFTWARE.
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
|
|
#include "py/runtime.h"
|
|
#include "py/mphal.h"
|
|
#include "py/mperrno.h"
|
|
#include "extmod/machine_spi.h"
|
|
#include "pin.h"
|
|
#include "spi.h"
|
|
#include "ra/ra_spi.h"
|
|
#include "modmachine.h"
|
|
|
|
typedef struct _machine_hard_spi_obj_t {
|
|
mp_obj_base_t base;
|
|
uint8_t spi_id;
|
|
uint8_t polarity;
|
|
uint8_t phase;
|
|
uint8_t bits;
|
|
uint8_t firstbit;
|
|
uint32_t baudrate;
|
|
mp_hal_pin_obj_t sck;
|
|
mp_hal_pin_obj_t mosi;
|
|
mp_hal_pin_obj_t miso;
|
|
} machine_hard_spi_obj_t;
|
|
|
|
#define DEFAULT_SPI_BAUDRATE (500000)
|
|
#define DEFAULT_SPI_POLARITY (0)
|
|
#define DEFAULT_SPI_PHASE (0)
|
|
#define DEFAULT_SPI_BITS (8)
|
|
#define DEFAULT_SPI_FIRSTBIT (MICROPY_PY_MACHINE_SPI_MSB)
|
|
|
|
#define IS_VALID_SCK(obj_pin, arg_pin) ((obj_pin) == (arg_pin))
|
|
#define IS_VALID_MOSI(obj_pin, arg_pin) ((obj_pin) == (arg_pin))
|
|
#define IS_VALID_MISO(obj_pin, arg_pin) ((obj_pin) == (arg_pin))
|
|
#define IS_VALID_POLARITY(n) (((n) == 0) || ((n) == 1))
|
|
#define IS_VALID_PHASE(n) (((n) == 0) || ((n) == 1))
|
|
#define IS_VALID_BITS(n) (((n) == 8) || ((n) == 16) || ((n) == 32))
|
|
#define IS_VALID_FIRSTBIT(n) ((n) == MICROPY_PY_MACHINE_SPI_LSB)
|
|
|
|
/******************************************************************************/
|
|
// Implementation of hard SPI for machine module
|
|
|
|
STATIC machine_hard_spi_obj_t machine_hard_spi_obj[] = {
|
|
#if defined(MICROPY_HW_SPI0_RSPCK)
|
|
{
|
|
{&machine_hard_spi_type}, 0,
|
|
DEFAULT_SPI_POLARITY, DEFAULT_SPI_PHASE, DEFAULT_SPI_BITS,
|
|
DEFAULT_SPI_FIRSTBIT, DEFAULT_SPI_BAUDRATE,
|
|
MICROPY_HW_SPI0_RSPCK, MICROPY_HW_SPI0_MOSI, MICROPY_HW_SPI0_MISO,
|
|
},
|
|
#endif
|
|
#if defined(MICROPY_HW_SPI1_RSPCK)
|
|
{
|
|
{&machine_hard_spi_type}, 1,
|
|
DEFAULT_SPI_POLARITY, DEFAULT_SPI_PHASE, DEFAULT_SPI_BITS,
|
|
DEFAULT_SPI_FIRSTBIT, DEFAULT_SPI_BAUDRATE,
|
|
MICROPY_HW_SPI1_RSPCK, MICROPY_HW_SPI1_MOSI, MICROPY_HW_SPI1_MISO,
|
|
},
|
|
#endif
|
|
};
|
|
|
|
STATIC void machine_hard_spi_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
|
|
machine_hard_spi_obj_t *self = MP_OBJ_TO_PTR(self_in);
|
|
mp_printf(print, "SPI(%u, baudrate=%u, polarity=%u, phase=%u, bits=%u, firstbit=%u, sck=%q, mosi=%q, miso=%q)",
|
|
self->spi_id, self->baudrate, self->polarity, self->phase, self->bits,
|
|
self->firstbit, self->sck->name, self->mosi->name, self->miso->name);
|
|
}
|
|
|
|
mp_obj_t machine_hard_spi_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *all_args) {
|
|
MP_MACHINE_SPI_CHECK_FOR_LEGACY_SOFTSPI_CONSTRUCTION(n_args, n_kw, all_args);
|
|
|
|
enum { ARG_id, ARG_baudrate, ARG_polarity, ARG_phase, ARG_bits, ARG_firstbit, ARG_sck, ARG_mosi, ARG_miso };
|
|
static const mp_arg_t allowed_args[] = {
|
|
{ MP_QSTR_id, MP_ARG_REQUIRED | MP_ARG_OBJ },
|
|
{ MP_QSTR_baudrate, MP_ARG_INT, {.u_int = -1} },
|
|
{ MP_QSTR_polarity, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = -1} },
|
|
{ MP_QSTR_phase, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = -1} },
|
|
{ MP_QSTR_bits, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = -1} },
|
|
{ MP_QSTR_firstbit, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = -1} },
|
|
{ MP_QSTR_sck, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = MP_OBJ_NULL} },
|
|
{ MP_QSTR_mosi, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = MP_OBJ_NULL} },
|
|
{ MP_QSTR_miso, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = MP_OBJ_NULL} },
|
|
};
|
|
mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
|
|
mp_arg_parse_all_kw_array(n_args, n_kw, all_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
|
|
|
|
// get the SPI bus id.
|
|
bool found = false;
|
|
int spi_id = mp_obj_get_int(args[ARG_id].u_obj);
|
|
machine_hard_spi_obj_t *self = (machine_hard_spi_obj_t *)&machine_hard_spi_obj[0];
|
|
for (int i = 0; i < MP_ARRAY_SIZE(machine_hard_spi_obj); i++) {
|
|
if (spi_id == self->spi_id) {
|
|
found = true;
|
|
break;
|
|
}
|
|
++self;
|
|
}
|
|
if (found != true) {
|
|
mp_raise_msg_varg(&mp_type_ValueError, MP_ERROR_TEXT("SPI(%d) doesno't exist"), spi_id);
|
|
}
|
|
|
|
if (args[ARG_baudrate].u_int != -1) {
|
|
self->baudrate = args[ARG_baudrate].u_int;
|
|
}
|
|
if (args[ARG_polarity].u_int != -1) {
|
|
if (IS_VALID_POLARITY(args[ARG_polarity].u_int)) {
|
|
self->polarity = args[ARG_polarity].u_int;
|
|
} else {
|
|
mp_raise_ValueError(MP_ERROR_TEXT("bad polarity"));
|
|
}
|
|
}
|
|
if (args[ARG_phase].u_int != -1) {
|
|
if (IS_VALID_PHASE(args[ARG_phase].u_int)) {
|
|
self->phase = args[ARG_phase].u_int;
|
|
} else {
|
|
mp_raise_ValueError(MP_ERROR_TEXT("bad phase"));
|
|
}
|
|
}
|
|
if (args[ARG_bits].u_int != -1) {
|
|
if (IS_VALID_BITS(args[ARG_bits].u_int)) {
|
|
self->bits = args[ARG_bits].u_int;
|
|
} else {
|
|
mp_raise_ValueError(MP_ERROR_TEXT("bad bits"));
|
|
}
|
|
}
|
|
if (args[ARG_firstbit].u_int != -1) {
|
|
if (IS_VALID_FIRSTBIT(args[ARG_firstbit].u_int)) {
|
|
self->firstbit = args[ARG_firstbit].u_int;
|
|
} else {
|
|
mp_raise_ValueError(MP_ERROR_TEXT("bad firstbit"));
|
|
}
|
|
}
|
|
// Set SCK/MOSI/MISO pins if configured.
|
|
// currently pins are fixed, can not be changed.
|
|
uint8_t sck, mosi, miso;
|
|
|
|
if (args[ARG_sck].u_obj == MP_OBJ_NULL) {
|
|
sck = self->sck->pin;
|
|
} else {
|
|
const machine_pin_obj_t *arg_sck = mp_hal_get_pin_obj(args[ARG_sck].u_obj);
|
|
sck = arg_sck->pin;
|
|
if (!IS_VALID_SCK(self->sck->pin, sck)) {
|
|
mp_raise_ValueError(MP_ERROR_TEXT("bad SCK pin"));
|
|
}
|
|
}
|
|
if (args[ARG_mosi].u_obj == MP_OBJ_NULL) {
|
|
mosi = self->mosi->pin;
|
|
} else {
|
|
const machine_pin_obj_t *arg_mosi = mp_hal_get_pin_obj(args[ARG_mosi].u_obj);
|
|
mosi = arg_mosi->pin;
|
|
if (!IS_VALID_MOSI(self->mosi->pin, mosi)) {
|
|
mp_raise_ValueError(MP_ERROR_TEXT("bad MOSI pin"));
|
|
}
|
|
}
|
|
if (args[ARG_miso].u_obj == MP_OBJ_NULL) {
|
|
miso = self->miso->pin;
|
|
} else {
|
|
const machine_pin_obj_t *arg_miso = mp_hal_get_pin_obj(args[ARG_miso].u_obj);
|
|
miso = arg_miso->pin;
|
|
if (!IS_VALID_MISO(self->miso->pin, miso)) {
|
|
mp_raise_ValueError(MP_ERROR_TEXT("bad MISO pin"));
|
|
}
|
|
}
|
|
// init the SPI bus
|
|
spi_init(self->spi_id);
|
|
// set configurable paramaters
|
|
spi_set_params(self->spi_id, self->baudrate, self->polarity,
|
|
self->phase, self->bits, self->firstbit);
|
|
return MP_OBJ_FROM_PTR(self);
|
|
}
|
|
|
|
STATIC void machine_hard_spi_init(mp_obj_base_t *self_in, size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
|
|
machine_hard_spi_obj_t *self = (machine_hard_spi_obj_t *)self_in;
|
|
|
|
enum { ARG_baudrate, ARG_polarity, ARG_phase, ARG_bits, ARG_firstbit, ARG_sck, ARG_mosi, ARG_miso };
|
|
static const mp_arg_t allowed_args[] = {
|
|
{ MP_QSTR_baudrate, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = -1} },
|
|
{ MP_QSTR_polarity, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = -1} },
|
|
{ MP_QSTR_phase, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = -1} },
|
|
{ MP_QSTR_bits, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = -1} },
|
|
{ MP_QSTR_firstbit, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = -1} },
|
|
{ MP_QSTR_sck, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = MP_OBJ_NULL} },
|
|
{ MP_QSTR_mosi, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = MP_OBJ_NULL} },
|
|
{ MP_QSTR_miso, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = MP_OBJ_NULL} },
|
|
};
|
|
mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
|
|
mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
|
|
|
|
// Set SCK/MOSI/MISO pins if configured.
|
|
// currently pins are fixed, can not be changed.
|
|
uint8_t sck, mosi, miso;
|
|
|
|
if (args[ARG_baudrate].u_int != -1) {
|
|
self->baudrate = args[ARG_baudrate].u_int;
|
|
}
|
|
if (args[ARG_polarity].u_int != -1) {
|
|
if (IS_VALID_POLARITY(args[ARG_polarity].u_int)) {
|
|
self->polarity = args[ARG_polarity].u_int;
|
|
} else {
|
|
mp_raise_ValueError(MP_ERROR_TEXT("bad polarity"));
|
|
}
|
|
}
|
|
if (args[ARG_phase].u_int != -1) {
|
|
if (IS_VALID_PHASE(args[ARG_phase].u_int)) {
|
|
self->phase = args[ARG_phase].u_int;
|
|
} else {
|
|
mp_raise_ValueError(MP_ERROR_TEXT("bad phase"));
|
|
}
|
|
}
|
|
if (args[ARG_bits].u_int != -1) {
|
|
if (IS_VALID_BITS(args[ARG_bits].u_int)) {
|
|
self->bits = args[ARG_bits].u_int;
|
|
} else {
|
|
mp_raise_ValueError(MP_ERROR_TEXT("bad bits"));
|
|
}
|
|
}
|
|
if (args[ARG_firstbit].u_int != -1) {
|
|
if (IS_VALID_FIRSTBIT(args[ARG_firstbit].u_int)) {
|
|
self->firstbit = args[ARG_firstbit].u_int;
|
|
} else {
|
|
mp_raise_ValueError(MP_ERROR_TEXT("bad firstbit"));
|
|
}
|
|
}
|
|
if (args[ARG_sck].u_obj != MP_OBJ_NULL) {
|
|
const machine_pin_obj_t *arg_sck = mp_hal_get_pin_obj(args[ARG_sck].u_obj);
|
|
sck = arg_sck->pin;
|
|
if (!IS_VALID_SCK(self->sck->pin, sck)) {
|
|
mp_raise_ValueError(MP_ERROR_TEXT("bad SCK pin"));
|
|
}
|
|
}
|
|
if (args[ARG_mosi].u_obj != MP_OBJ_NULL) {
|
|
const machine_pin_obj_t *arg_mosi = mp_hal_get_pin_obj(args[ARG_mosi].u_obj);
|
|
mosi = arg_mosi->pin;
|
|
if (!IS_VALID_MOSI(self->mosi->pin, mosi)) {
|
|
mp_raise_ValueError(MP_ERROR_TEXT("bad MOSI pin"));
|
|
}
|
|
}
|
|
if (args[ARG_miso].u_obj != MP_OBJ_NULL) {
|
|
const machine_pin_obj_t *arg_miso = mp_hal_get_pin_obj(args[ARG_miso].u_obj);
|
|
miso = arg_miso->pin;
|
|
if (!IS_VALID_MISO(self->miso->pin, miso)) {
|
|
mp_raise_ValueError(MP_ERROR_TEXT("bad MISO pin"));
|
|
}
|
|
}
|
|
|
|
if (self->firstbit == MICROPY_PY_MACHINE_SPI_LSB) {
|
|
mp_raise_NotImplementedError(MP_ERROR_TEXT("LSB"));
|
|
}
|
|
|
|
// init the SPI bus
|
|
spi_init(self->spi_id);
|
|
// set configurable paramaters
|
|
spi_set_params(self->spi_id, self->baudrate, self->polarity,
|
|
self->phase, self->bits, self->firstbit);
|
|
}
|
|
|
|
STATIC void machine_hard_spi_deinit(mp_obj_base_t *self_in) {
|
|
machine_hard_spi_obj_t *self = (machine_hard_spi_obj_t *)self_in;
|
|
spi_deinit(self->spi_id);
|
|
}
|
|
|
|
STATIC void machine_hard_spi_transfer(mp_obj_base_t *self_in, size_t len, const uint8_t *src, uint8_t *dest) {
|
|
machine_hard_spi_obj_t *self = (machine_hard_spi_obj_t *)self_in;
|
|
spi_transfer(self->spi_id, self->bits, len, src, dest, SPI_TRANSFER_TIMEOUT(len));
|
|
}
|
|
|
|
STATIC const mp_machine_spi_p_t machine_hard_spi_p = {
|
|
.init = machine_hard_spi_init,
|
|
.deinit = machine_hard_spi_deinit,
|
|
.transfer = machine_hard_spi_transfer,
|
|
};
|
|
|
|
const mp_obj_type_t machine_hard_spi_type = {
|
|
{ &mp_type_type },
|
|
.name = MP_QSTR_SPI,
|
|
.print = machine_hard_spi_print,
|
|
.make_new = machine_hard_spi_make_new,
|
|
.protocol = &machine_hard_spi_p,
|
|
.locals_dict = (mp_obj_dict_t *)&mp_machine_spi_locals_dict,
|
|
};
|
|
|
|
void spi_init0(void) {
|
|
}
|
|
|
|
// sets the parameters in the SPI_InitTypeDef struct
|
|
// if an argument is -1 then the corresponding parameter is not changed
|
|
void spi_set_params(uint32_t ch, int32_t baudrate,
|
|
int32_t polarity, int32_t phase, int32_t bits, int32_t firstbit) {
|
|
ra_spi_set_mode(ch, polarity, phase);
|
|
ra_spi_set_clk(ch, baudrate);
|
|
ra_spi_set_bits(ch, bits);
|
|
ra_spi_set_lsb_first(ch, firstbit);
|
|
}
|
|
|
|
void spi_init(uint32_t ch) {
|
|
const machine_pin_obj_t *pins[4] = { NULL, NULL, NULL, NULL };
|
|
|
|
if (0) {
|
|
#if defined(MICROPY_HW_SPI0_RSPCK)
|
|
} else if (ch == 0) {
|
|
#if defined(MICROPY_HW_SPI0_SSL)
|
|
pins[0] = MICROPY_HW_SPI0_SSL;
|
|
#endif
|
|
#if defined(MICROPY_HW_SPI0_RSPCK)
|
|
pins[1] = MICROPY_HW_SPI0_RSPCK;
|
|
#endif
|
|
#if defined(MICROPY_HW_SPI0_MISO)
|
|
pins[2] = MICROPY_HW_SPI0_MISO;
|
|
#endif
|
|
#if defined(MICROPY_HW_SPI0_MOSI)
|
|
pins[3] = MICROPY_HW_SPI0_MOSI;
|
|
#endif
|
|
ra_spi_init(ch, pins[3]->pin, pins[2]->pin, pins[1]->pin, pins[0]->pin, DEFAULT_SPI_BAUDRATE, DEFAULT_SPI_BITS, DEFAULT_SPI_POLARITY, DEFAULT_SPI_PHASE);
|
|
#endif
|
|
#if defined(MICROPY_HW_SPI1_RSPCK)
|
|
} else if (ch == 1) {
|
|
#if defined(MICROPY_HW_SPI1_SSL)
|
|
pins[0] = MICROPY_HW_SPI1_SSL;
|
|
#endif
|
|
#if defined(MICROPY_HW_SPI1_RSPCK)
|
|
pins[1] = MICROPY_HW_SPI1_RSPCK;
|
|
#endif
|
|
#if defined(MICROPY_HW_SPI1_MISO)
|
|
pins[2] = MICROPY_HW_SPI1_MISO;
|
|
#endif
|
|
#if defined(MICROPY_HW_SPI1_MOSI)
|
|
pins[3] = MICROPY_HW_SPI1_MOSI;
|
|
#endif
|
|
ra_spi_init(ch, pins[3]->pin, pins[2]->pin, pins[1]->pin, pins[0]->pin, DEFAULT_SPI_BAUDRATE, DEFAULT_SPI_BITS, DEFAULT_SPI_POLARITY, DEFAULT_SPI_PHASE);
|
|
#endif
|
|
} else {
|
|
// SPI does not exist for this board (shouldn't get here, should be checked by caller)
|
|
return;
|
|
}
|
|
}
|
|
|
|
void spi_deinit(uint32_t ch) {
|
|
if (0) {
|
|
#if defined(MICROPY_HW_SPI0_RSPCK)
|
|
} else if (ch == 0) {
|
|
ra_spi_deinit(ch, 0);
|
|
#endif
|
|
#if defined(MICROPY_HW_SPI1_RSPCK)
|
|
} else if (ch == 1) {
|
|
ra_spi_deinit(ch, 0);
|
|
#endif
|
|
}
|
|
}
|
|
|
|
void spi_transfer(uint32_t ch, uint32_t bits, size_t len, const uint8_t *src, uint8_t *dest, uint32_t timeout) {
|
|
ra_spi_transfer(ch, bits, dest, (uint8_t *)src, (uint32_t)len, timeout);
|
|
}
|