1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
|
/*
* Copyright (c) 2016 embedded brains GmbH. All rights reserved.
*
* embedded brains GmbH
* Dornierstr. 4
* 82178 Puchheim
* Germany
* <info@embedded-brains.de>
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
#ifndef LIBBSP_ARM_ATSAM_SC16IS752_H
#define LIBBSP_ARM_ATSAM_SC16IS752_H
#include <rtems/irq-extension.h>
#include <libchip/chip.h>
#include <dev/serial/sc16is752.h>
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
typedef struct {
sc16is752_spi_context base;
Pin irq_pin;
rtems_interrupt_server_entry irqs_entry; /* Internal. Don't touch. */
rtems_interrupt_server_action irqs_action; /* Internal. Don't touch. */
} atsam_sc16is752_spi_context;
/**
* @brief Creates an SPI connected SC16IS752 device.
*
* This devices uses the interrupt server, see
* rtems_interrupt_server_initialize().
*
* The device claims the interrupt of the PIO block.
*
* @param[in] ctx The device context. May have an arbitrary content.
* @param[in] device_path The device file path for the new device.
* @param[in] mode The SC16IS752 mode.
* @param[in] input_frequency The input frequency in Hertz of the SC16IS752
* chip. See XTAL1 and XTAL2 pins.
* @param[in] spi_path The SPI bus device path.
* @param[in] spi_chip_select The SPI chip select (starts with 0, the SPI
* driver uses SPI_ChipSelect(1 << spi_chip_select)).
* @param[in] spi_speed_hz The SPI bus speed in Hertz.
* @param[in] irq_pin The interrupt pin, e.g. { PIO_PD28, PIOD, ID_PIOD,
* PIO_INPUT, PIO_IT_LOW_LEVEL }.
*
* @return See sc16is752_spi_create().
*/
int atsam_sc16is752_spi_create(
atsam_sc16is752_spi_context *ctx,
const char *device_path,
sc16is752_mode mode,
uint32_t input_frequency,
const char *spi_path,
uint8_t spi_chip_select,
uint32_t spi_speed_hz,
const Pin *irq_pin
);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* LIBBSP_ARM_ATSAM_SC16IS752_H */
|
