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
|
/****************************************************************************
* arch/z80/src/z180/z180_lowscc.c
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdint.h>
#include <string.h>
#include <arch/io.h>
#include <nuttx/arch.h>
#include <nuttx/sched.h>
#include "chip/chip.h"
#include "common/up_internal.h"
#include "z180_config.h"
#if defined(USE_LOWSERIALINIT) && defined(HAVE_SCC)
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* Select UART parameters for the selected console */
#if defined(CONFIG_Z180_SCC_SERIAL_CONSOLE)
# define CONSOLE_CR Z181_SCC_CR
# define CONSOLE_DR Z181_SCC_DR
# define CONSOLE_BAUD CONFIG_Z180_SCC_BAUD
# define CONSOLE_BITS CONFIG_Z180_SCC_BITS
# define CONSOLE_2STOP CONFIG_Z180_SCC_2STOP
# define CONSOLE_PARITY CONFIG_Z180_SCC_PARITY
#elif defined(CONFIG_Z180_ESCCA_SERIAL_CONSOLE)
# define CONSOLE_CR Z182_ESCCA_CR
# define CONSOLE_DR Z182_ESCCA_DR
# define CONSOLE_BAUD CONFIG_Z180_ESCCA_BAUD
# define CONSOLE_BITS CONFIG_Z180_ESCCA_BITS
# define CONSOLE_2STOP CONFIG_Z180_ESCCA_2STOP
# define CONSOLE_PARITY CONFIG_Z180_ESCCA_PARITY
#elif defined(CONFIG_Z180_ESCCB_SERIAL_CONSOLE)
# define CONSOLE_CR Z182_ESCCB_CR
# define CONSOLE_DR Z182_ESCCB_DR
# define CONSOLE_BAUD CONFIG_Z180_ESCCB_BAUD
# define CONSOLE_BITS CONFIG_Z180_ESCCB_BITS
# define CONSOLE_PARITY CONFIG_Z180_ESCCB_PARITY
#endif
/****************************************************************************
* Private Data
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: z180_scc_lowinit
*
* Description:
* Called early in the boot sequence to initialize the [E]SCC console
* channel (only).
*
****************************************************************************/
#ifdef USE_LOWSERIALINIT
void z180_scc_lowinit(void)
{
#ifdef HAVE_SCC_CONSOLE
#warning "Missing logic"
#endif
}
#endif
/****************************************************************************
* Name: z180_putc
*
* Description:
* Low-level character output
*
****************************************************************************/
#ifdef HAVE_SCC_CONSOLE
void z180_putc(uint8_t ch) __naked
{
__asm
txbe:
in0 a,(CONSOLE_CR) ; Read RR0
bit 2, a ; Bit 2, Tx buffer empty?
jr z, txbe ; No, wait until the Tx buffer is empty
ld a, 4(ix) ; Character to output
out (CONSOLE_DR), a ; Send it
ret
__endasm;
}
#endif
#endif /* USE_LOWSERIALINIT && HAVE_SCC*/
|
