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micropython/ports/renesas-ra/machine_spi.c

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/*
* 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,
};
MP_DEFINE_CONST_OBJ_TYPE(
machine_hard_spi_type,
MP_QSTR_SPI,
MP_TYPE_FLAG_NONE,
make_new, machine_hard_spi_make_new,
locals_dict, &mp_machine_spi_locals_dict,
print, machine_hard_spi_print,
protocol, &machine_hard_spi_p
);
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);
}
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