developed_by_feng-arch_add_dma_support_in_machine_spi #1
@ -34,21 +34,21 @@
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#include "hardware/spi.h"
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#include "hardware/dma.h"
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#define DEFAULT_SPI_BAUDRATE (1000000)
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#define DEFAULT_SPI_POLARITY (0)
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#define DEFAULT_SPI_PHASE (0)
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#define DEFAULT_SPI_BITS (8)
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#define DEFAULT_SPI_FIRSTBIT (SPI_MSB_FIRST)
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#define DEFAULT_SPI_BAUDRATE (1000000)
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#define DEFAULT_SPI_POLARITY (0)
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#define DEFAULT_SPI_PHASE (0)
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#define DEFAULT_SPI_BITS (8)
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#define DEFAULT_SPI_FIRSTBIT (SPI_MSB_FIRST)
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#ifdef MICROPY_HW_SPI_NO_DEFAULT_PINS
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// With no default SPI, need to require the pin args.
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#define MICROPY_HW_SPI0_SCK (0)
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#define MICROPY_HW_SPI0_MOSI (0)
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#define MICROPY_HW_SPI0_MISO (0)
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#define MICROPY_HW_SPI1_SCK (0)
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#define MICROPY_HW_SPI1_MOSI (0)
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#define MICROPY_HW_SPI1_MISO (0)
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#define MICROPY_HW_SPI0_SCK (0)
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#define MICROPY_HW_SPI0_MOSI (0)
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#define MICROPY_HW_SPI0_MISO (0)
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#define MICROPY_HW_SPI1_SCK (0)
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#define MICROPY_HW_SPI1_MOSI (0)
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#define MICROPY_HW_SPI1_MISO (0)
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#define MICROPY_SPI_PINS_ARG_OPTS MP_ARG_REQUIRED
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#else
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@ -58,41 +58,40 @@
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#ifndef MICROPY_HW_SPI0_SCK
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#if PICO_DEFAULT_SPI == 0
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#define MICROPY_HW_SPI0_SCK (PICO_DEFAULT_SPI_SCK_PIN)
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#define MICROPY_HW_SPI0_MOSI (PICO_DEFAULT_SPI_TX_PIN)
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#define MICROPY_HW_SPI0_MISO (PICO_DEFAULT_SPI_RX_PIN)
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#define MICROPY_HW_SPI0_SCK (PICO_DEFAULT_SPI_SCK_PIN)
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#define MICROPY_HW_SPI0_MOSI (PICO_DEFAULT_SPI_TX_PIN)
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#define MICROPY_HW_SPI0_MISO (PICO_DEFAULT_SPI_RX_PIN)
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#else
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#define MICROPY_HW_SPI0_SCK (6)
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#define MICROPY_HW_SPI0_MOSI (7)
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#define MICROPY_HW_SPI0_MISO (4)
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#define MICROPY_HW_SPI0_SCK (6)
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#define MICROPY_HW_SPI0_MOSI (7)
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#define MICROPY_HW_SPI0_MISO (4)
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#endif
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#endif
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#ifndef MICROPY_HW_SPI1_SCK
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#if PICO_DEFAULT_SPI == 1
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#define MICROPY_HW_SPI1_SCK (PICO_DEFAULT_SPI_SCK_PIN)
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#define MICROPY_HW_SPI1_MOSI (PICO_DEFAULT_SPI_TX_PIN)
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#define MICROPY_HW_SPI1_MISO (PICO_DEFAULT_SPI_RX_PIN)
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#define MICROPY_HW_SPI1_SCK (PICO_DEFAULT_SPI_SCK_PIN)
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#define MICROPY_HW_SPI1_MOSI (PICO_DEFAULT_SPI_TX_PIN)
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#define MICROPY_HW_SPI1_MISO (PICO_DEFAULT_SPI_RX_PIN)
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#else
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#define MICROPY_HW_SPI1_SCK (10)
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#define MICROPY_HW_SPI1_MOSI (11)
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#define MICROPY_HW_SPI1_MISO (8)
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#define MICROPY_HW_SPI1_SCK (10)
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#define MICROPY_HW_SPI1_MOSI (11)
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#define MICROPY_HW_SPI1_MISO (8)
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#endif
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#endif
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#endif
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// SPI0 can be GP{0..7,16..23}, SPI1 can be GP{8..15,24..29}.
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#define IS_VALID_PERIPH(spi, pin) ((((pin) & 8) >> 3) == (spi))
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#define IS_VALID_PERIPH(spi, pin) ((((pin) & 8) >> 3) == (spi))
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// GP{2,6,10,14,...}
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#define IS_VALID_SCK(spi, pin) (((pin) & 3) == 2 && IS_VALID_PERIPH(spi, pin))
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#define IS_VALID_SCK(spi, pin) (((pin) & 3) == 2 && IS_VALID_PERIPH(spi, pin))
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// GP{3,7,11,15,...}
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#define IS_VALID_MOSI(spi, pin) (((pin) & 3) == 3 && IS_VALID_PERIPH(spi, pin))
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#define IS_VALID_MOSI(spi, pin) (((pin) & 3) == 3 && IS_VALID_PERIPH(spi, pin))
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// GP{0,4,8,10,...}
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#define IS_VALID_MISO(spi, pin) (((pin) & 3) == 0 && IS_VALID_PERIPH(spi, pin))
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#define IS_VALID_MISO(spi, pin) (((pin) & 3) == 0 && IS_VALID_PERIPH(spi, pin))
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typedef struct _machine_spi_obj_t
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{
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typedef struct _machine_spi_obj_t {
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mp_obj_base_t base;
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spi_inst_t *const spi_inst;
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uint8_t spi_id;
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@ -112,16 +111,9 @@ typedef struct _machine_spi_obj_t
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static machine_spi_obj_t machine_spi_obj[] = {
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{
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{&machine_spi_type},
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spi0,
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0,
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DEFAULT_SPI_POLARITY,
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DEFAULT_SPI_PHASE,
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DEFAULT_SPI_BITS,
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DEFAULT_SPI_FIRSTBIT,
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MICROPY_HW_SPI0_SCK,
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MICROPY_HW_SPI0_MOSI,
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MICROPY_HW_SPI0_MISO,
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{&machine_spi_type}, spi0, 0,
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DEFAULT_SPI_POLARITY, DEFAULT_SPI_PHASE, DEFAULT_SPI_BITS, DEFAULT_SPI_FIRSTBIT,
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MICROPY_HW_SPI0_SCK, MICROPY_HW_SPI0_MOSI, MICROPY_HW_SPI0_MISO,
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0,
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// DMA channels, -1 means not claimed
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-1,
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@ -129,16 +121,9 @@ static machine_spi_obj_t machine_spi_obj[] = {
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NULL
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},
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{
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{&machine_spi_type},
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spi1,
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1,
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DEFAULT_SPI_POLARITY,
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DEFAULT_SPI_PHASE,
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DEFAULT_SPI_BITS,
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DEFAULT_SPI_FIRSTBIT,
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MICROPY_HW_SPI1_SCK,
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MICROPY_HW_SPI1_MOSI,
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MICROPY_HW_SPI1_MISO,
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{&machine_spi_type}, spi1, 1,
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DEFAULT_SPI_POLARITY, DEFAULT_SPI_PHASE, DEFAULT_SPI_BITS, DEFAULT_SPI_FIRSTBIT,
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MICROPY_HW_SPI1_SCK, MICROPY_HW_SPI1_MOSI, MICROPY_HW_SPI1_MISO,
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0,
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// DMA channels, -1 means not claimed
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-1,
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@ -147,38 +132,25 @@ static machine_spi_obj_t machine_spi_obj[] = {
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},
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};
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static void machine_spi_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind)
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{
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static void machine_spi_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
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machine_spi_obj_t *self = MP_OBJ_TO_PTR(self_in);
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mp_printf(print, "SPI(%u, baudrate=%u, polarity=%u, phase=%u, bits=%u, sck=%u, mosi=%u, miso=%u)",
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self->spi_id, self->baudrate, self->polarity, self->phase, self->bits,
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self->sck, self->mosi, self->miso);
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self->spi_id, self->baudrate, self->polarity, self->phase, self->bits,
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self->sck, self->mosi, self->miso);
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}
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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)
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{
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enum
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{
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ARG_id,
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ARG_baudrate,
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ARG_polarity,
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ARG_phase,
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ARG_bits,
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ARG_firstbit,
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ARG_sck,
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ARG_mosi,
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ARG_miso
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};
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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) {
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enum { ARG_id, ARG_baudrate, ARG_polarity, ARG_phase, ARG_bits, ARG_firstbit, ARG_sck, ARG_mosi, ARG_miso };
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static const mp_arg_t allowed_args[] = {
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{MP_QSTR_id, MP_ARG_REQUIRED | MP_ARG_OBJ},
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{MP_QSTR_baudrate, MP_ARG_INT, {.u_int = DEFAULT_SPI_BAUDRATE}},
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{MP_QSTR_polarity, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = DEFAULT_SPI_POLARITY}},
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{MP_QSTR_phase, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = DEFAULT_SPI_PHASE}},
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{MP_QSTR_bits, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = DEFAULT_SPI_BITS}},
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{MP_QSTR_firstbit, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = DEFAULT_SPI_FIRSTBIT}},
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{MP_QSTR_sck, MICROPY_SPI_PINS_ARG_OPTS | MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_rom_obj = MP_ROM_NONE}},
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{MP_QSTR_mosi, MICROPY_SPI_PINS_ARG_OPTS | MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_rom_obj = MP_ROM_NONE}},
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{MP_QSTR_miso, MICROPY_SPI_PINS_ARG_OPTS | MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_rom_obj = MP_ROM_NONE}},
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{ MP_QSTR_id, MP_ARG_REQUIRED | MP_ARG_OBJ },
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{ MP_QSTR_baudrate, MP_ARG_INT, {.u_int = DEFAULT_SPI_BAUDRATE} },
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{ MP_QSTR_polarity, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = DEFAULT_SPI_POLARITY} },
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{ MP_QSTR_phase, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = DEFAULT_SPI_PHASE} },
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{ MP_QSTR_bits, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = DEFAULT_SPI_BITS} },
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{ MP_QSTR_firstbit, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = DEFAULT_SPI_FIRSTBIT} },
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{ MP_QSTR_sck, MICROPY_SPI_PINS_ARG_OPTS | MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_rom_obj = MP_ROM_NONE} },
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{ MP_QSTR_mosi, MICROPY_SPI_PINS_ARG_OPTS | MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_rom_obj = MP_ROM_NONE} },
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{ MP_QSTR_miso, MICROPY_SPI_PINS_ARG_OPTS | MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_rom_obj = MP_ROM_NONE} },
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};
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// Parse the arguments.
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@ -187,8 +159,7 @@ mp_obj_t machine_spi_make_new(const mp_obj_type_t *type, size_t n_args, size_t n
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// Get the SPI bus id.
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int spi_id = mp_obj_get_int(args[ARG_id].u_obj);
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if (spi_id < 0 || spi_id >= MP_ARRAY_SIZE(machine_spi_obj))
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{
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if (spi_id < 0 || spi_id >= MP_ARRAY_SIZE(machine_spi_obj)) {
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mp_raise_msg_varg(&mp_type_ValueError, MP_ERROR_TEXT("SPI(%d) doesn't exist"), spi_id);
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}
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@ -196,31 +167,25 @@ mp_obj_t machine_spi_make_new(const mp_obj_type_t *type, size_t n_args, size_t n
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machine_spi_obj_t *self = (machine_spi_obj_t *)&machine_spi_obj[spi_id];
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// Set SCK/MOSI/MISO pins if configured.
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if (args[ARG_sck].u_obj != mp_const_none)
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{
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if (args[ARG_sck].u_obj != mp_const_none) {
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int sck = mp_hal_get_pin_obj(args[ARG_sck].u_obj);
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if (!IS_VALID_SCK(self->spi_id, sck))
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{
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if (!IS_VALID_SCK(self->spi_id, sck)) {
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mp_raise_ValueError(MP_ERROR_TEXT("bad SCK pin"));
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}
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self->sck = sck;
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}
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if (args[ARG_mosi].u_obj != mp_const_none)
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{
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if (args[ARG_mosi].u_obj != mp_const_none) {
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int mosi = mp_hal_get_pin_obj(args[ARG_mosi].u_obj);
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if (!IS_VALID_MOSI(self->spi_id, mosi))
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{
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if (!IS_VALID_MOSI(self->spi_id, mosi)) {
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mp_raise_ValueError(MP_ERROR_TEXT("bad MOSI pin"));
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}
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self->mosi = mosi;
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if (self->chan_tx < 0)
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self->chan_tx = dma_claim_unused_channel(true);
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}
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if (args[ARG_miso].u_obj != mp_const_none)
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{
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if (args[ARG_miso].u_obj != mp_const_none) {
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int miso = mp_hal_get_pin_obj(args[ARG_miso].u_obj);
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if (!IS_VALID_MISO(self->spi_id, miso))
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{
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if (!IS_VALID_MISO(self->spi_id, miso)) {
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mp_raise_ValueError(MP_ERROR_TEXT("bad MISO pin"));
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}
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self->miso = miso;
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@ -229,15 +194,13 @@ mp_obj_t machine_spi_make_new(const mp_obj_type_t *type, size_t n_args, size_t n
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}
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// Initialise the SPI peripheral if any arguments given, or it was not initialised previously.
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if (n_args > 1 || n_kw > 0 || self->baudrate == 0)
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{
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if (n_args > 1 || n_kw > 0 || self->baudrate == 0) {
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self->baudrate = args[ARG_baudrate].u_int;
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self->polarity = args[ARG_polarity].u_int;
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self->phase = args[ARG_phase].u_int;
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self->bits = args[ARG_bits].u_int;
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self->firstbit = args[ARG_firstbit].u_int;
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if (self->firstbit == SPI_LSB_FIRST)
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{
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if (self->firstbit == SPI_LSB_FIRST) {
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mp_raise_NotImplementedError(MP_ERROR_TEXT("LSB"));
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}
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@ -252,22 +215,14 @@ mp_obj_t machine_spi_make_new(const mp_obj_type_t *type, size_t n_args, size_t n
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return MP_OBJ_FROM_PTR(self);
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}
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static void machine_spi_init(mp_obj_base_t *self_in, size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args)
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{
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enum
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{
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ARG_baudrate,
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ARG_polarity,
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ARG_phase,
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ARG_bits,
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ARG_firstbit
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};
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static void machine_spi_init(mp_obj_base_t *self_in, size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
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enum { ARG_baudrate, ARG_polarity, ARG_phase, ARG_bits, ARG_firstbit };
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static const mp_arg_t allowed_args[] = {
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{MP_QSTR_baudrate, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = -1}},
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{MP_QSTR_polarity, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = -1}},
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{MP_QSTR_phase, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = -1}},
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{MP_QSTR_bits, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = -1}},
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{MP_QSTR_firstbit, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = -1}},
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{ MP_QSTR_baudrate, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = -1} },
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{ MP_QSTR_polarity, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = -1} },
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{ MP_QSTR_phase, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = -1} },
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{ MP_QSTR_bits, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = -1} },
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{ MP_QSTR_firstbit, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = -1} },
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};
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// Parse the arguments.
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@ -276,46 +231,38 @@ static void machine_spi_init(mp_obj_base_t *self_in, size_t n_args, const mp_obj
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mp_arg_parse_all(n_args, pos_args, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
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// Reconfigure the baudrate if requested.
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if (args[ARG_baudrate].u_int != -1)
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{
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if (args[ARG_baudrate].u_int != -1) {
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self->baudrate = spi_set_baudrate(self->spi_inst, args[ARG_baudrate].u_int);
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}
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// Reconfigure the format if requested.
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bool set_format = false;
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if (args[ARG_polarity].u_int != -1)
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{
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if (args[ARG_polarity].u_int != -1) {
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self->polarity = args[ARG_polarity].u_int;
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set_format = true;
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}
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if (args[ARG_phase].u_int != -1)
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{
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if (args[ARG_phase].u_int != -1) {
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self->phase = args[ARG_phase].u_int;
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set_format = true;
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}
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if (args[ARG_bits].u_int != -1)
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{
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if (args[ARG_bits].u_int != -1) {
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self->bits = args[ARG_bits].u_int;
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set_format = true;
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}
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if (args[ARG_firstbit].u_int != -1)
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{
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if (args[ARG_firstbit].u_int != -1) {
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self->firstbit = args[ARG_firstbit].u_int;
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if (self->firstbit == SPI_LSB_FIRST)
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{
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mp_raise_NotImplementedError(MP_ERROR_TEXT("LSB"));
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}
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}
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if (self->miso > 0 && self->chan_rx < 0)
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{
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if (self->miso > 0 && self->chan_rx < 0) {
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self->chan_rx = dma_claim_unused_channel(true);
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}
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if (self->mosi > 0 && self->chan_tx < 0)
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{
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if (self->mosi > 0 && self->chan_tx < 0) {
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self->chan_tx = dma_claim_unused_channel(true);
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}
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if (set_format)
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{
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if (set_format) {
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spi_set_format(self->spi_inst, self->bits, self->polarity, self->phase, self->firstbit);
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}
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}
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@ -429,8 +376,7 @@ static void machine_spi_wait_done(mp_obj_base_t *self_in)
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}
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}
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static void machine_spi_transfer(mp_obj_base_t *self_in, size_t len, const uint8_t *src, uint8_t *dest)
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{
|
||||
static void machine_spi_transfer(mp_obj_base_t *self_in, size_t len, const uint8_t *src, uint8_t *dest) {
|
||||
machine_spi_obj_t *self = (machine_spi_obj_t *)self_in;
|
||||
bool write_only = dest == NULL;
|
||||
const size_t dma_min_size_threshold = 8;
|
||||
@ -509,8 +455,7 @@ static void machine_spi_transfer(mp_obj_base_t *self_in, size_t len, const uint8
|
||||
|
||||
// Buffer protocol implementation for SPI.
|
||||
// The buffer represents the SPI data FIFO.
|
||||
static mp_int_t machine_spi_get_buffer(mp_obj_t o_in, mp_buffer_info_t *bufinfo, mp_uint_t flags)
|
||||
{
|
||||
static mp_int_t machine_spi_get_buffer(mp_obj_t o_in, mp_buffer_info_t *bufinfo, mp_uint_t flags) {
|
||||
machine_spi_obj_t *self = MP_OBJ_TO_PTR(o_in);
|
||||
|
||||
bufinfo->len = 4;
|
||||
@ -527,8 +472,6 @@ static const mp_machine_spi_p_t machine_spi_p = {
|
||||
.set_tx_isr = machine_spi_set_tx_isr,
|
||||
};
|
||||
|
||||
|
||||
|
||||
MP_DEFINE_CONST_OBJ_TYPE(
|
||||
machine_spi_type,
|
||||
MP_QSTR_SPI,
|
||||
@ -537,22 +480,19 @@ MP_DEFINE_CONST_OBJ_TYPE(
|
||||
print, machine_spi_print,
|
||||
protocol, &machine_spi_p,
|
||||
buffer, machine_spi_get_buffer,
|
||||
locals_dict, &mp_machine_spi_locals_dict);
|
||||
locals_dict, &mp_machine_spi_locals_dict
|
||||
);
|
||||
|
||||
mp_obj_base_t *mp_hal_get_spi_obj(mp_obj_t o)
|
||||
{
|
||||
if (mp_obj_is_type(o, &machine_spi_type))
|
||||
{
|
||||
mp_obj_base_t *mp_hal_get_spi_obj(mp_obj_t o) {
|
||||
if (mp_obj_is_type(o, &machine_spi_type)) {
|
||||
return MP_OBJ_TO_PTR(o);
|
||||
}
|
||||
#if MICROPY_PY_MACHINE_SOFTSPI
|
||||
else if (mp_obj_is_type(o, &mp_machine_soft_spi_type))
|
||||
{
|
||||
else if (mp_obj_is_type(o, &mp_machine_soft_spi_type)) {
|
||||
return MP_OBJ_TO_PTR(o);
|
||||
}
|
||||
#endif
|
||||
else
|
||||
{
|
||||
else {
|
||||
mp_raise_TypeError(MP_ERROR_TEXT("expecting an SPI object"));
|
||||
}
|
||||
}
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user