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
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
|
/** ###################################################################
** THIS BEAN MODULE IS GENERATED BY THE TOOL. DO NOT MODIFY IT.
** Filename : COM0.C
** Project : RTOSDemo
** Processor : MC9S12DP256BCPV
** Beantype : AsynchroSerial
** Version : Bean 02.231, Driver 01.08, CPU db: 2.87.283
** Compiler : Metrowerks HC12 C Compiler
** Date/Time : 19/06/2005, 15:07
** Abstract :
** This bean "AsynchroSerial" implements an asynchronous serial
** communication. The bean supports different settings of
** parity, word width, stop-bit and communication speed,
** user can select interrupt or polling handler.
** Communication speed can be changed also in runtime.
** The bean requires one on-chip asynchronous serial channel.
** Settings :
** Serial channel : SCI0
**
** Protocol
** Init baud rate : 38400baud
** Width : 8 bits
** Stop bits : 1
** Parity : none
** Breaks : Disabled
**
** Registers
** Input buffer : SCI0DRL [207]
** Output buffer : SCI0DRL [207]
** Control register : SCI0CR1 [202]
** Mode register : SCI0CR2 [203]
** Baud setting reg. : SCI0BD [200]
** Special register : SCI0SR1 [204]
**
** Input interrupt
** Vector name : INT_SCI0
** Priority : 1
**
** Output interrupt
** Vector name : INT_SCI0
** Priority : 1
**
** Used pins :
** ----------------------------------------------------
** Function | On package | Name
** ----------------------------------------------------
** Input | 89 | PS0_RxD0
** Output | 90 | PS1_TxD0
** ----------------------------------------------------
**
**
** Used baud modes :
** ----------------------------------------------------
** No. | Mode ID | Baud rate
** ----------------------------------------------------
** 0 | Bm_38400baud | 38400baud
** 1 | Bm_19200baud | 19200baud
** 2 | Bm_9600baud | 9600baud
** 3 | Bm_4800baud | 4800baud
** ----------------------------------------------------
** Contents :
** SetBaudRateMode - byte COM0_SetBaudRateMode(byte Mod);
**
** (c) Copyright UNIS, spol. s r.o. 1997-2002
** UNIS, spol. s r.o.
** Jundrovska 33
** 624 00 Brno
** Czech Republic
** http : www.processorexpert.com
** mail : info@processorexpert.com
** ###################################################################*/
/* MODULE COM0. */
#pragma MESSAGE DISABLE C4002 /* WARNING C4002: Result not used is ignored */
#pragma MESSAGE DISABLE C4301 /* INFORMATION C4301: Inline expansion done for function call */
#include "COM0.h"
#include "TickTimer.h"
#include "Byte1.h"
/* Definition of DATA and CODE segments for this bean. User can specify where
these segments will be located on "Build options" tab of the selected CPU bean. */
#pragma DATA_SEG COM0_DATA /* Data section for this module. */
#pragma CODE_SEG COM0_CODE /* Code section for this module. */
#define OVERRUN_ERR 1 /* Overrun error flag bit */
#define FRAMING_ERR 2 /* Framing error flag bit */
#define PARITY_ERR 4 /* Parity error flag bit */
#define CHAR_IN_RX 8 /* Char is in RX buffer */
#define FULL_TX 16 /* Full transmit buffer */
#define RUNINT_FROM_TX 32 /* Interrupt is in progress */
#define FULL_RX 64 /* Full receive buffer */
#define NOISE_ERR 128 /* Noise erorr flag bit */
#define IDLE_ERR 256 /* Idle character flag bit */
#define BREAK_ERR 512 /* Break detect */
static word SerFlag; /* Flags for serial communication */
/* Bits: 0 - OverRun error */
/* 1 - Framing error */
/* 2 - Parity error */
/* 3 - Char in RX buffer */
/* 4 - Full TX buffer */
/* 5 - Running int from TX */
/* 6 - Full RX buffer */
/* 7 - Noise error */
/* 8 - Idle character */
/* 9 - Break detected */
/* 10 - Unused */
static word PrescHigh;
static byte NumMode; /* Number of selected baud mode */
/*
** ===================================================================
** Method : HWEnDi (bean AsynchroSerial)
**
** Description :
** This method is internal. It is used by Processor Expert
** only.
** ===================================================================
*/
static void HWEnDi(void)
{
SCI0CR2_TE = 1; /* Enable transmitter */
SCI0CR2_RE = 1; /* Enable receiver */
SCI0CR2_RIE = 1; /* Enable recieve interrupt */
}
/*
** ===================================================================
** Method : COM0_SetBaudRateMode (bean AsynchroSerial)
**
** Description :
** This method changes the channel communication speed (baud
** rate). This method can be used only if you specify a list
** of possible period settings at design time (see <Timing
** dialog box> - Runtime setting - from a list of values).
** Each of these settings constitutes a mode and Processor
** Expert^[TM] assigns them a mode identifier. The prescaler
** and compare values corresponding to each mode are
** calculated at design time. You may switch modes at
** runtime by referring only to a mode identifier. No
** run-time calculations are performed, all the calculations
** are performed at design time.
** Parameters :
** NAME - DESCRIPTION
** Mod - Timing mode to set
** Returns :
** --- - Error code, possible codes:
** ERR_OK - OK
** ERR_SPEED - This device does not work in
** the active speed mode
** ===================================================================
*/
byte COM0_SetBaudRateMode(byte Mod)
{
static const word COM0_PrescHigh[4] = {41,81,163,326};
if(Mod >= 4) /* Is mode in baud mode list */
return ERR_VALUE; /* If no then error */
NumMode = Mod; /* New baud mode */
PrescHigh = COM0_PrescHigh[Mod]; /* Prescaler in high speed mode */
SCI0BD = PrescHigh; /* Set prescaler bits */
return ERR_OK; /* OK */
}
/*
** ===================================================================
** Method : COM0_Init (bean AsynchroSerial)
**
** Description :
** This method is internal. It is used by Processor Expert
** only.
** ===================================================================
*/
void COM0_Init(void)
{
PrescHigh = 41; /* Precaler in high speed mode */
SerFlag = 0; /* Reset flags */
NumMode = 0; /* Number of selected baud mode */
/* SCI0CR1: LOOPS=0,SCISWAI=1,RSRC=0,M=0,WAKE=0,ILT=0,PE=0,PT=0 */
SCI0CR1 = 64; /* Set the SCI configuration */
/* SCI0SR2: ??=0,??=0,??=0,??=0,??=0,BRK13=0,TXDIR=0,RAF=0 */
SCI0SR2 = 0; /* Set the Break Character Length and Transmitter pin data direction in Single-wire mode */
SCI0SR1; /* Reset interrupt request flags */
/* SCI0CR2: SCTIE=0,TCIE=0,RIE=0,ILIE=0,TE=0,RE=0,RWU=0,SBK=0 */
SCI0CR2 = 0; /* Disable error interrupts */
SCI0BD = PrescHigh; /* Set prescaler bits */
HWEnDi(); /* Enable/disable device according to status flags */
}
/* END COM0. */
/*
** ###################################################################
**
** This file was created by UNIS Processor Expert 03.33 for
** the Motorola HCS12 series of microcontrollers.
**
** ###################################################################
*/
|
