FreeRTOS/Demo/RISC-V_RV32_SiFive_HiFive1-RevB_FreedomStudio/freedom-metal/src/spi.c


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21

/* Copyright 2018 SiFive, Inc */
/* SPDX-License-Identifier: Apache-2.0 */

#include <metal/machine.h>
#include <metal/spi.h>

extern __inline__ void metal_spi_init(struct metal_spi *spi, int baud_rate);
extern __inline__ int metal_spi_transfer(struct metal_spi *spi, struct metal_spi_config *config, size_t len, char *tx_buf, char *rx_buf);
extern __inline__ int metal_spi_get_baud_rate(struct metal_spi *spi);
extern __inline__ int metal_spi_set_baud_rate(struct metal_spi *spi, int baud_rate);

struct metal_spi *metal_spi_get_device(unsigned int device_num)
{
#if __METAL_DT_MAX_SPIS > 0
    if (device_num < __METAL_DT_MAX_SPIS) {
        return (struct metal_spi *) __metal_spi_table[device_num];
    }
#endif

    return NULL;
}