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
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
|
/*
ChibiOS - Copyright (C) 2006..2018 Giovanni Di Sirio
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
/**
* @file LPC214x/hal_spi_lld.h
* @brief LPC214x low level SPI driver header.
*
* @addtogroup SPI
* @{
*/
#ifndef HAL_SPI_LLD_H
#define HAL_SPI_LLD_H
#if HAL_USE_SPI || defined(__DOXYGEN__)
/*===========================================================================*/
/* Driver constants. */
/*===========================================================================*/
/**
* @brief Circular mode support flag.
*/
#define SPI_SUPPORTS_CIRCULAR FALSE
/**
* @brief Hardware FIFO depth.
*/
#define LPC214x_SSP_FIFO_DEPTH 8
/*===========================================================================*/
/* Driver pre-compile time settings. */
/*===========================================================================*/
/**
* @brief SPI1 driver enable switch.
* @details If set to @p TRUE the support for SSP is included.
* @note The default is @p TRUE.
*/
#if !defined(LPC214x_SPI_USE_SSP) || defined(__DOXYGEN__)
#define LPC214x_SPI_USE_SSP TRUE
#endif
/**
* @brief SSP interrupt priority level setting.
*/
#if !defined(LPC214x_SPI_SSP_IRQ_PRIORITY) || defined(__DOXYGEN__)
#define LPC214x_SPI_SSP_IRQ_PRIORITY 4
#endif
/**
* @brief Overflow error hook.
* @details The default action is to stop the system.
*/
#if !defined(LPC214x_SPI_SSP_ERROR_HOOK) || defined(__DOXYGEN__)
#define LPC214x_SPI_SSP_ERROR_HOOK() osalSysHalt("overflow")
#endif
/*===========================================================================*/
/* Derived constants and error checks. */
/*===========================================================================*/
#if !LPC214x_SPI_USE_SSP
#error "SPI driver activated but no SPI peripheral assigned"
#endif
/*===========================================================================*/
/* Driver data structures and types. */
/*===========================================================================*/
/*===========================================================================*/
/* Driver macros. */
/*===========================================================================*/
/**
* @brief Low level fields of the SPI driver structure.
*/
#define spi_lld_driver_fields \
/* Pointer to the SSP registers block.*/ \
SSP *ssp; \
/* Number of bytes yet to be received.*/ \
uint32_t rxcnt; \
/* Receive pointer or @p NULL.*/ \
void *rxptr; \
/* Number of bytes yet to be transmitted.*/ \
uint32_t txcnt; \
/* Transmit pointer or @p NULL.*/ \
const void *txptr
/**
* @brief Low level fields of the SPI configuration structure.
*/
#define spi_lld_config_fields \
/* SSP CR0 initialization data.*/ \
uint16_t cr0; \
/* SSP CPSR initialization data.*/ \
uint32_t cpsr
/*===========================================================================*/
/* External declarations. */
/*===========================================================================*/
#if LPC214x_SPI_USE_SSP && !defined(__DOXYGEN__)
extern SPIDriver SPID1;
#endif
#ifdef __cplusplus
extern "C" {
#endif
void spi_lld_init(void);
void spi_lld_start(SPIDriver *spip);
void spi_lld_stop(SPIDriver *spip);
void spi_lld_select(SPIDriver *spip);
void spi_lld_unselect(SPIDriver *spip);
void spi_lld_ignore(SPIDriver *spip, size_t n);
void spi_lld_exchange(SPIDriver *spip, size_t n,
const void *txbuf, void *rxbuf);
void spi_lld_send(SPIDriver *spip, size_t n, const void *txbuf);
void spi_lld_receive(SPIDriver *spip, size_t n, void *rxbuf);
uint16_t spi_lld_polled_exchange(SPIDriver *spip, uint16_t frame);
#ifdef __cplusplus
}
#endif
#endif /* HAL_USE_SPI */
#endif /* HAL_SPI_LLD_H */
/** @} */
|
