mirror of
https://github.com/mruby/mruby
synced 2026-06-08 16:11:16 +00:00
Yukihiro "Matz" Matsumoto
5931a96a17
Add hw-spi gem with SPI communication support: - Common Ruby API with write, read, and full-duplex transfer - ports/esp32/ using ESP-IDF SPI master driver - ports/rp2040/ using Pico SDK Based on picoruby-spi by HASUMI Hitoshi. Co-authored-by: Claude <noreply@anthropic.com>
45 lines
1019 B
C
45 lines
1019 B
C
#ifndef MRUBY_SPI_H
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#define MRUBY_SPI_H
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#include <stdint.h>
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#include <stddef.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define MRB_SPI_MSB_FIRST 1
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#define MRB_SPI_LSB_FIRST 0
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typedef enum {
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MRB_SPI_OK = 0,
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MRB_SPI_ERROR_UNIT = -1,
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MRB_SPI_ERROR_MODE = -2,
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MRB_SPI_ERROR_FIRST_BIT = -3,
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MRB_SPI_ERROR_INIT = -4,
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} mrb_spi_status;
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typedef struct {
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uint32_t frequency;
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uint8_t unit_num;
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int8_t sck_pin;
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int8_t copi_pin;
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int8_t cipo_pin;
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int8_t cs_pin;
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uint8_t mode;
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uint8_t first_bit;
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} mrb_spi_info;
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/* HAL functions - implemented in ports/<platform>/spi.c */
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int mrb_spi_unit_name_to_num(const char *name);
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mrb_spi_status mrb_spi_init(mrb_spi_info *info);
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int mrb_spi_read(mrb_spi_info *info, uint8_t *dst, size_t len, uint8_t tx_val);
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int mrb_spi_write(mrb_spi_info *info, const uint8_t *src, size_t len);
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int mrb_spi_transfer(mrb_spi_info *info, const uint8_t *tx, uint8_t *rx, size_t len);
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#ifdef __cplusplus
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}
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#endif
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#endif /* MRUBY_SPI_H */
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