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-rw-r--r--stmhal/spi.c288
1 files changed, 52 insertions, 236 deletions
diff --git a/stmhal/spi.c b/stmhal/spi.c
index e72810d287..234d4bab72 100644
--- a/stmhal/spi.c
+++ b/stmhal/spi.c
@@ -243,12 +243,6 @@ STATIC void spi_set_params(SPI_HandleTypeDef *spi, uint32_t prescale, int32_t ba
// TODO allow to take a list of pins to use
void spi_init(SPI_HandleTypeDef *spi, bool enable_nss_pin) {
- // init the GPIO lines
- GPIO_InitTypeDef GPIO_InitStructure;
- GPIO_InitStructure.Mode = GPIO_MODE_AF_PP;
- GPIO_InitStructure.Speed = GPIO_SPEED_FAST;
- GPIO_InitStructure.Pull = spi->Init.CLKPolarity == SPI_POLARITY_LOW ? GPIO_PULLDOWN : GPIO_PULLUP;
-
const pyb_spi_obj_t *self;
const pin_obj_t *pins[4];
pins[0] = NULL;
@@ -331,8 +325,11 @@ void spi_init(SPI_HandleTypeDef *spi, bool enable_nss_pin) {
return;
}
+ // init the GPIO lines
+ uint32_t mode = MP_HAL_PIN_MODE_ALT;
+ uint32_t pull = spi->Init.CLKPolarity == SPI_POLARITY_LOW ? MP_HAL_PIN_PULL_DOWN : MP_HAL_PIN_PULL_UP;
for (uint i = (enable_nss_pin && pins[0] ? 0 : 1); i < 4; i++) {
- mp_hal_pin_set_af(pins[i], &GPIO_InitStructure, AF_FN_SPI, (self - &pyb_spi_obj[0]) + 1);
+ mp_hal_pin_config_alt(pins[i], mode, pull, AF_FN_SPI, (self - &pyb_spi_obj[0]) + 1);
}
// init the SPI device
@@ -603,7 +600,7 @@ STATIC mp_obj_t pyb_spi_init_helper(const pyb_spi_obj_t *self, mp_uint_t n_args,
///
/// At the moment, the NSS pin is not used by the SPI driver and is free
/// for other use.
-STATIC mp_obj_t pyb_spi_make_new(const mp_obj_type_t *type, mp_uint_t n_args, mp_uint_t n_kw, const mp_obj_t *args) {
+STATIC mp_obj_t pyb_spi_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *args) {
// check arguments
mp_arg_check_num(n_args, n_kw, 1, MP_OBJ_FUN_ARGS_MAX, true);
@@ -832,216 +829,7 @@ const mp_obj_type_t pyb_spi_type = {
};
/******************************************************************************/
-/* MicroPython bindings for machine API */
-
-// for make_new
-enum {
- ARG_NEW_id,
- ARG_NEW_baudrate,
- ARG_NEW_polarity,
- ARG_NEW_phase,
- ARG_NEW_bits,
- ARG_NEW_firstbit,
- ARG_NEW_sck,
- ARG_NEW_mosi,
- ARG_NEW_miso
-};
-
-// for init
-enum {
- ARG_INIT_baudrate,
- ARG_INIT_polarity,
- ARG_INIT_phase,
- ARG_INIT_bits,
- ARG_INIT_firstbit
-};
-
-STATIC mp_obj_t machine_soft_spi_make_new(mp_arg_val_t *args);
-STATIC void machine_soft_spi_init(mp_obj_t self, mp_arg_val_t *args);
-STATIC void machine_soft_spi_deinit(mp_obj_t self);
-
-STATIC mp_obj_t machine_hard_spi_make_new(mp_arg_val_t *args);
-STATIC void machine_hard_spi_init(mp_obj_t self, mp_arg_val_t *args);
-STATIC void machine_hard_spi_deinit(mp_obj_t self);
-
-/* common code for both soft and hard implementations *************************/
-
-STATIC mp_obj_t machine_spi_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *all_args) {
- static const mp_arg_t allowed_args[] = {
- { MP_QSTR_id, MP_ARG_OBJ, {.u_obj = MP_OBJ_NEW_SMALL_INT(-1)} },
- { MP_QSTR_baudrate, MP_ARG_INT, {.u_int = 500000} },
- { MP_QSTR_polarity, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 0} },
- { MP_QSTR_phase, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 0} },
- { MP_QSTR_bits, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 8} },
- { MP_QSTR_firstbit, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = SPI_FIRSTBIT_MSB} },
- { 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} },
- };
-
- // parse args
- 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);
-
- if (args[ARG_NEW_id].u_obj == MP_OBJ_NEW_SMALL_INT(-1)) {
- // software SPI
- return machine_soft_spi_make_new(args);
- } else {
- // hardware peripheral id given
- return machine_hard_spi_make_new(args);
- }
-}
-
-STATIC mp_obj_t machine_spi_init(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
- 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} },
- };
-
- // parse args
- mp_obj_t self = pos_args[0];
- mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
- mp_arg_parse_all(n_args - 1, pos_args + 1, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
-
- // dispatch to specific implementation
- if (mp_obj_get_type(self) == &machine_soft_spi_type) {
- machine_soft_spi_init(self, args);
- } else {
- machine_hard_spi_init(self, args);
- }
-
- return mp_const_none;
-}
-STATIC MP_DEFINE_CONST_FUN_OBJ_KW(machine_spi_init_obj, 1, machine_spi_init);
-
-STATIC mp_obj_t machine_spi_deinit(mp_obj_t self) {
- // dispatch to specific implementation
- if (mp_obj_get_type(self) == &machine_soft_spi_type) {
- machine_soft_spi_deinit(self);
- } else {
- machine_hard_spi_deinit(self);
- }
- return mp_const_none;
-}
-STATIC MP_DEFINE_CONST_FUN_OBJ_1(machine_spi_deinit_obj, machine_spi_deinit);
-
-STATIC const mp_rom_map_elem_t machine_spi_locals_dict_table[] = {
- { MP_ROM_QSTR(MP_QSTR_init), MP_ROM_PTR(&machine_spi_init_obj) },
- { MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&machine_spi_deinit_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) },
-
- { MP_ROM_QSTR(MP_QSTR_MSB), MP_ROM_INT(SPI_FIRSTBIT_MSB) },
- { MP_ROM_QSTR(MP_QSTR_LSB), MP_ROM_INT(SPI_FIRSTBIT_LSB) },
-};
-
-STATIC MP_DEFINE_CONST_DICT(machine_spi_locals_dict, machine_spi_locals_dict_table);
-
-/* code for soft implementation ***********************************************/
-
-// for the software SPI implementation, this is roughly the max baudrate
-#define MAX_BAUDRATE (HAL_RCC_GetSysClockFreq() / 48)
-
-STATIC uint32_t baudrate_from_delay_half(uint32_t delay_half) {
- if (delay_half == MICROPY_PY_MACHINE_SPI_MIN_DELAY) {
- return MAX_BAUDRATE;
- } else {
- return 500000 / delay_half;
- }
-}
-
-STATIC uint32_t baudrate_to_delay_half(uint32_t baudrate) {
- if (baudrate >= MAX_BAUDRATE) {
- return MICROPY_PY_MACHINE_SPI_MIN_DELAY;
- } else {
- uint32_t delay_half = 500000 / baudrate;
- // round delay_half up so that: actual_baudrate <= requested_baudrate
- if (500000 % baudrate != 0) {
- delay_half += 1;
- }
- return delay_half;
- }
-}
-
-STATIC void machine_soft_spi_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
- mp_machine_soft_spi_obj_t *self = MP_OBJ_TO_PTR(self_in);
- mp_printf(print, "SPI(-1, baudrate=%u, polarity=%u, phase=%u, sck=%q, mosi=%q, miso=%q)",
- baudrate_from_delay_half(self->delay_half), self->polarity, self->phase,
- self->sck->name, self->mosi->name, self->miso->name);
-}
-
-STATIC mp_obj_t machine_soft_spi_make_new(mp_arg_val_t *args) {
- // create new object
- mp_machine_soft_spi_obj_t *self = m_new_obj(mp_machine_soft_spi_obj_t);
- self->base.type = &machine_soft_spi_type;
-
- // set parameters
- self->delay_half = baudrate_to_delay_half(args[ARG_NEW_baudrate].u_int);
- self->polarity = args[ARG_NEW_polarity].u_int;
- self->phase = args[ARG_NEW_phase].u_int;
- if (args[ARG_NEW_bits].u_int != 8) {
- mp_raise_ValueError("bits must be 8");
- }
- if (args[ARG_NEW_firstbit].u_int != SPI_FIRSTBIT_MSB) {
- mp_raise_ValueError("firstbit must be MSB");
- }
- if (args[ARG_NEW_sck].u_obj == MP_OBJ_NULL
- || args[ARG_NEW_mosi].u_obj == MP_OBJ_NULL
- || args[ARG_NEW_miso].u_obj == MP_OBJ_NULL) {
- mp_raise_ValueError("must specify all of sck/mosi/miso");
- }
- self->sck = mp_hal_get_pin_obj(args[ARG_NEW_sck].u_obj);
- self->mosi = mp_hal_get_pin_obj(args[ARG_NEW_mosi].u_obj);
- self->miso = mp_hal_get_pin_obj(args[ARG_NEW_miso].u_obj);
-
- // configure pins
- mp_hal_pin_write(self->sck, self->polarity);
- mp_hal_pin_output(self->sck);
- mp_hal_pin_output(self->mosi);
- mp_hal_pin_input(self->miso);
-
- return MP_OBJ_FROM_PTR(self);
-}
-
-STATIC void machine_soft_spi_init(mp_obj_t self_in, mp_arg_val_t *args) {
- mp_machine_soft_spi_obj_t *self = MP_OBJ_TO_PTR(self_in);
-
- // update parameters
- if (args[ARG_INIT_baudrate].u_int != -1) {
- self->delay_half = baudrate_to_delay_half(args[ARG_INIT_baudrate].u_int);
- }
- if (args[ARG_INIT_polarity].u_int != -1) {
- self->polarity = args[ARG_INIT_polarity].u_int;
- }
- if (args[ARG_INIT_phase].u_int != -1) {
- self->phase = args[ARG_INIT_phase].u_int;
- }
-}
-
-STATIC void machine_soft_spi_deinit(mp_obj_t self) {
- // nothing to do
- (void)self;
-}
-
-STATIC const mp_machine_spi_p_t machine_soft_spi_p = {
- .transfer = mp_machine_soft_spi_transfer,
-};
-
-const mp_obj_type_t machine_soft_spi_type = {
- { &mp_type_type },
- .name = MP_QSTR_SoftSPI,
- .print = machine_soft_spi_print,
- .make_new = machine_spi_make_new,
- .protocol = &machine_soft_spi_p,
- .locals_dict = (mp_obj_t)&machine_spi_locals_dict,
-};
-
-/* code for hard implementation ***********************************************/
+// Implementation of hard SPI for machine module
typedef struct _machine_hard_spi_obj_t {
mp_obj_base_t base;
@@ -1058,19 +846,34 @@ STATIC const machine_hard_spi_obj_t machine_hard_spi_obj[] = {
};
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 = self_in;
+ machine_hard_spi_obj_t *self = (machine_hard_spi_obj_t*)self_in;
spi_print(print, self->pyb->spi, false);
}
-STATIC mp_obj_t machine_hard_spi_make_new(mp_arg_val_t *args) {
+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) {
+ 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_OBJ, {.u_obj = MP_OBJ_NEW_SMALL_INT(-1)} },
+ { MP_QSTR_baudrate, MP_ARG_INT, {.u_int = 500000} },
+ { MP_QSTR_polarity, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 0} },
+ { MP_QSTR_phase, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 0} },
+ { MP_QSTR_bits, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 8} },
+ { MP_QSTR_firstbit, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = SPI_FIRSTBIT_MSB} },
+ { 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 static peripheral object
- int spi_id = spi_find(args[ARG_NEW_id].u_obj);
+ int spi_id = spi_find(args[ARG_id].u_obj);
const machine_hard_spi_obj_t *self = &machine_hard_spi_obj[spi_id - 1];
// here we would check the sck/mosi/miso pins and configure them, but it's not implemented
- if (args[ARG_NEW_sck].u_obj != MP_OBJ_NULL
- || args[ARG_NEW_mosi].u_obj != MP_OBJ_NULL
- || args[ARG_NEW_miso].u_obj != MP_OBJ_NULL) {
+ if (args[ARG_sck].u_obj != MP_OBJ_NULL
+ || args[ARG_mosi].u_obj != MP_OBJ_NULL
+ || args[ARG_miso].u_obj != MP_OBJ_NULL) {
mp_raise_ValueError("explicit choice of sck/mosi/miso is not implemented");
}
@@ -1086,9 +889,9 @@ STATIC mp_obj_t machine_hard_spi_make_new(mp_arg_val_t *args) {
init->CRCPolynomial = 0;
// set configurable paramaters
- spi_set_params(self->pyb->spi, 0xffffffff, args[ARG_NEW_baudrate].u_int,
- args[ARG_NEW_polarity].u_int, args[ARG_NEW_phase].u_int, args[ARG_NEW_bits].u_int,
- args[ARG_NEW_firstbit].u_int);
+ spi_set_params(self->pyb->spi, 0xffffffff, args[ARG_baudrate].u_int,
+ args[ARG_polarity].u_int, args[ARG_phase].u_int, args[ARG_bits].u_int,
+ args[ARG_firstbit].u_int);
// init the SPI bus
spi_init(self->pyb->spi, false);
@@ -1096,20 +899,31 @@ STATIC mp_obj_t machine_hard_spi_make_new(mp_arg_val_t *args) {
return MP_OBJ_FROM_PTR(self);
}
-STATIC void machine_hard_spi_init(mp_obj_t self_in, mp_arg_val_t *args) {
- machine_hard_spi_obj_t *self = self_in;
+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 };
+ 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_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 the SPI configuration values
- spi_set_params(self->pyb->spi, 0xffffffff, args[ARG_INIT_baudrate].u_int,
- args[ARG_INIT_polarity].u_int, args[ARG_INIT_phase].u_int, args[ARG_INIT_bits].u_int,
- args[ARG_INIT_firstbit].u_int);
+ spi_set_params(self->pyb->spi, 0xffffffff, args[ARG_baudrate].u_int,
+ args[ARG_polarity].u_int, args[ARG_phase].u_int, args[ARG_bits].u_int,
+ args[ARG_firstbit].u_int);
// re-init the SPI bus
spi_init(self->pyb->spi, false);
}
-STATIC void machine_hard_spi_deinit(mp_obj_t self_in) {
- machine_hard_spi_obj_t *self = self_in;
+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->pyb->spi);
}
@@ -1119,6 +933,8 @@ STATIC void machine_hard_spi_transfer(mp_obj_base_t *self_in, size_t len, const
}
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,
};
@@ -1126,7 +942,7 @@ const mp_obj_type_t machine_hard_spi_type = {
{ &mp_type_type },
.name = MP_QSTR_SPI,
.print = machine_hard_spi_print,
- .make_new = machine_spi_make_new,
+ .make_new = mp_machine_spi_make_new, // delegate to master constructor
.protocol = &machine_hard_spi_p,
- .locals_dict = (mp_obj_t)&machine_spi_locals_dict,
+ .locals_dict = (mp_obj_t)&mp_machine_spi_locals_dict,
};
generated by cgit v1.2.3 (git 2.39.1) at 2025-05-18 07:01:56 +0000