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
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
|
/*
* Copyright © 2009 Keith Packard <keithp@keithp.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
#include "ao.h"
const __code struct ao_serial_speed ao_serial_speeds[] = {
/* [AO_SERIAL_SPEED_4800] = */ {
/* .baud = */ 163,
/* .gcr = */ (7 << UxGCR_BAUD_E_SHIFT) | UxGCR_ORDER_LSB
},
/* [AO_SERIAL_SPEED_9600] = */ {
/* .baud = */ 163,
/* .gcr = */ (8 << UxGCR_BAUD_E_SHIFT) | UxGCR_ORDER_LSB
},
/* [AO_SERIAL_SPEED_19200] = */ {
/* .baud = */ 163,
/* .gcr = */ (9 << UxGCR_BAUD_E_SHIFT) | UxGCR_ORDER_LSB
},
/* [AO_SERIAL_SPEED_57600] = */ {
/* .baud = */ 59,
/* .gcr = */ (11 << UxGCR_BAUD_E_SHIFT) | UxGCR_ORDER_LSB
},
/* [AO_SERIAL_SPEED_115200] = */ {
/* .baud = */ 59,
/* .gcr = */ (12 << UxGCR_BAUD_E_SHIFT) | UxGCR_ORDER_LSB
},
};
#define AO_SERIAL_SPEED_MAX AO_SERIAL_SPEED_115200
#if HAS_SERIAL_1_ALT_1
#define SERIAL_1_RTS P0_3
#else
#define SERIAL_1_RTS P1_5
#endif
#if HAS_SERIAL_0_ALT_1
#define SERIAL_0_RTS P0_5
#else
#define SERIAL_0_RTS P1_3
#endif
#if HAS_SERIAL_0
volatile __xdata struct ao_fifo ao_serial0_rx_fifo;
volatile __xdata struct ao_fifo ao_serial0_tx_fifo;
void
ao_serial0_rx_isr(void) __interrupt 2
{
if (!ao_fifo_full(ao_serial0_rx_fifo))
ao_fifo_insert(ao_serial0_rx_fifo, U0DBUF);
ao_wakeup(&ao_serial0_rx_fifo);
#if USE_SERIAL_0_STDIN
ao_wakeup(&ao_stdin_ready);
#endif
#if HAS_SERIAL_0_HW_FLOW
if (ao_fifo_mostly(ao_serial0_rx_fifo))
SERIAL_0_RTS = 1;
#endif
}
static __xdata uint8_t ao_serial0_tx_started;
static void
ao_serial0_tx_start(void)
{
if (!ao_fifo_empty(ao_serial0_tx_fifo) &&
!ao_serial0_tx_started)
{
ao_serial0_tx_started = 1;
ao_fifo_remove(ao_serial0_tx_fifo, U0DBUF);
}
}
void
ao_serial0_tx_isr(void) __interrupt 7
{
UTX0IF = 0;
ao_serial0_tx_started = 0;
ao_serial0_tx_start();
ao_wakeup(&ao_serial0_tx_fifo);
}
char
ao_serial0_getchar(void) __critical
{
char c;
while (ao_fifo_empty(ao_serial0_rx_fifo))
ao_sleep(&ao_serial0_rx_fifo);
ao_fifo_remove(ao_serial0_rx_fifo, c);
#if HAS_SERIAL_0_HW_FLOW
if (ao_fifo_barely(ao_serial0_rx_fifo))
SERIAL_0_RTS = 0;
#endif
return c;
}
#if USE_SERIAL_0_STDIN
int
_ao_serial0_pollchar(void)
{
uint8_t c;
if (ao_fifo_empty(ao_serial0_rx_fifo))
return AO_READ_AGAIN;
ao_fifo_remove(ao_serial0_rx_fifo,c);
#if HAS_SERIAL_0_HW_FLOW
if (ao_fifo_barely(ao_serial0_rx_fifo))
SERIAL_0_RTS = 0;
#endif
return c;
}
#endif
void
ao_serial0_putchar(char c) __critical
{
while (ao_fifo_full(ao_serial0_tx_fifo))
ao_sleep(&ao_serial0_tx_fifo);
ao_fifo_insert(ao_serial0_tx_fifo, c);
ao_serial0_tx_start();
}
void
ao_serial0_drain(void) __critical
{
while (!ao_fifo_empty(ao_serial0_tx_fifo))
ao_sleep(&ao_serial0_tx_fifo);
}
void
ao_serial0_set_speed(uint8_t speed)
{
ao_serial0_drain();
if (speed > AO_SERIAL_SPEED_MAX)
return;
U0UCR |= UxUCR_FLUSH;
U0BAUD = ao_serial_speeds[speed].baud;
U0GCR = ao_serial_speeds[speed].gcr;
}
#endif /* HAS_SERIAL_0 */
#if HAS_SERIAL_1
volatile __xdata struct ao_fifo ao_serial1_rx_fifo;
volatile __xdata struct ao_fifo ao_serial1_tx_fifo;
void
ao_serial1_rx_isr(void) __interrupt 3
{
if (!ao_fifo_full(ao_serial1_rx_fifo))
ao_fifo_insert(ao_serial1_rx_fifo, U1DBUF);
ao_wakeup(&ao_serial1_rx_fifo);
#if USE_SERIAL_1_STDIN
ao_wakeup(&ao_stdin_ready);
#endif
#if HAS_SERIAL_1_HW_FLOW
if (ao_fifo_mostly(ao_serial1_rx_fifo))
SERIAL_1_RTS = 1;
#endif
}
static __xdata uint8_t ao_serial1_tx_started;
static void
ao_serial1_tx_start(void)
{
if (!ao_fifo_empty(ao_serial1_tx_fifo) &&
!ao_serial1_tx_started)
{
ao_serial1_tx_started = 1;
ao_fifo_remove(ao_serial1_tx_fifo, U1DBUF);
}
}
void
ao_serial1_tx_isr(void) __interrupt 14
{
UTX1IF = 0;
ao_serial1_tx_started = 0;
ao_serial1_tx_start();
ao_wakeup(&ao_serial1_tx_fifo);
}
char
ao_serial1_getchar(void) __critical
{
char c;
while (ao_fifo_empty(ao_serial1_rx_fifo))
ao_sleep(&ao_serial1_rx_fifo);
ao_fifo_remove(ao_serial1_rx_fifo, c);
#if HAS_SERIAL_1_HW_FLOW
if (ao_fifo_barely(ao_serial1_rx_fifo))
SERIAL_1_RTS = 0;
#endif
return c;
}
#if USE_SERIAL_1_STDIN
int
_ao_serial1_pollchar(void)
{
uint8_t c;
if (ao_fifo_empty(ao_serial1_rx_fifo))
return AO_READ_AGAIN;
ao_fifo_remove(ao_serial1_rx_fifo,c);
#if HAS_SERIAL_1_HW_FLOW
if (ao_fifo_barely(ao_serial1_rx_fifo))
SERIAL_1_RTS = 0;
#endif
return c;
}
#endif
void
ao_serial1_putchar(char c) __critical
{
while (ao_fifo_full(ao_serial1_tx_fifo))
ao_sleep(&ao_serial1_tx_fifo);
ao_fifo_insert(ao_serial1_tx_fifo, c);
ao_serial1_tx_start();
}
void
ao_serial1_drain(void) __critical
{
while (!ao_fifo_empty(ao_serial1_tx_fifo))
ao_sleep(&ao_serial1_tx_fifo);
}
void
ao_serial1_set_speed(uint8_t speed)
{
ao_serial1_drain();
if (speed > AO_SERIAL_SPEED_MAX)
return;
U1UCR |= UxUCR_FLUSH;
U1BAUD = ao_serial_speeds[speed].baud;
U1GCR = ao_serial_speeds[speed].gcr;
}
#endif /* HAS_SERIAL_1 */
void
ao_serial_init(void)
{
#if HAS_SERIAL_0
#if HAS_SERIAL_0_ALT_1
/* Set up the USART pin assignment */
PERCFG = (PERCFG & ~PERCFG_U0CFG_ALT_MASK) | PERCFG_U0CFG_ALT_1;
P2DIR = (P2DIR & ~P2DIR_PRIP0_MASK) | P2DIR_PRIP0_USART0_USART1;
/* Make the USART pins be controlled by the USART */
P0SEL |= (1 << 2) | (1 << 3);
#if HAS_SERIAL_0_HW_FLOW
SERIAL_0_RTS = 0;
P0DIR |= (1 << 5);
P0SEL |= (1 << 4);
P0INP |= (1 << 4);
#endif
#else
/* Set up the USART pin assignment */
PERCFG = (PERCFG & ~PERCFG_U0CFG_ALT_MASK) | PERCFG_U0CFG_ALT_2;
P2SEL = (P2SEL & ~(P2SEL_PRI3P1_MASK | P2SEL_PRI0P1_MASK)) |
(P2SEL_PRI3P1_USART0 | P2SEL_PRI0P1_USART0);
/* Make the USART pins be controlled by the USART */
P1SEL |= (1 << 5) | (1 << 4);
#if HAS_SERIAL_0_HW_FLOW
SERIAL_0_RTS = 0;
P1DIR |= (1 << 3);
P1SEL |= (1 << 2);
P1INP |= (1 << 2);
#endif
#endif
/* UART mode with receiver enabled */
U0CSR = (UxCSR_MODE_UART | UxCSR_RE);
/* Pick a 9600 baud rate */
ao_serial0_set_speed(AO_SERIAL_SPEED_9600);
/* Reasonable serial parameters */
U0UCR = (UxUCR_FLUSH |
#if HAS_SERIAL_0_HW_FLOW
UxUCR_FLOW_ENABLE |
#else
UxUCR_FLOW_DISABLE |
#endif
UxUCR_D9_EVEN_PARITY |
UxUCR_BIT9_8_BITS |
UxUCR_PARITY_DISABLE |
UxUCR_SPB_1_STOP_BIT |
UxUCR_STOP_HIGH |
UxUCR_START_LOW);
IEN0 |= IEN0_URX0IE;
IEN2 |= IEN2_UTX0IE;
#if USE_SERIAL_0_STDIN && !DELAY_SERIAL_0_STDIN
ao_add_stdio(_ao_serial0_pollchar,
ao_serial0_putchar,
NULL);
#endif
#endif /* HAS_SERIAL_0 */
#if HAS_SERIAL_1
#if HAS_SERIAL_1_ALT_1
/* Set up the USART pin assignment */
PERCFG = (PERCFG & ~PERCFG_U1CFG_ALT_MASK) | PERCFG_U1CFG_ALT_1;
P2DIR = (P2DIR & ~P2DIR_PRIP0_MASK) | P2DIR_PRIP0_USART1_USART0;
/* Make the USART pins be controlled by the USART */
P0SEL |= (1 << 5) | (1 << 4);
#if HAS_SERIAL_1_HW_FLOW
/* SW RTS control (hw doesn't work) */
SERIAL_1_RTS = 0;
P0DIR |= 1 << 3;
/* HW CTS. Maybe this works? */
P0SEL |= 1 << 2;
P0INP |= 1 << 2;
#endif
#else
/* Set up the USART pin assignment */
PERCFG = (PERCFG & ~PERCFG_U1CFG_ALT_MASK) | PERCFG_U1CFG_ALT_2;
P2SEL = (P2SEL & ~(P2SEL_PRI3P1_MASK | P2SEL_PRI2P1_MASK)) |
(P2SEL_PRI3P1_USART1 | P2SEL_PRI2P1_USART1);
/* Make the USART pins be controlled by the USART */
P1SEL |= (1 << 6) | (1 << 7);
#if HAS_SERIAL_1_HW_FLOW
/* SW RTS control (hw doesn't work) */
SERIAL_1_RTS = 0;
P1DIR |= (1 << 5);
/* HW CTS. Maybe this works? */
P1SEL |= (1 << 4);
P1INP |= (1 << 4);
#endif
#endif
/* UART mode with receiver enabled */
U1CSR = (UxCSR_MODE_UART | UxCSR_RE);
/* Pick a 4800 baud rate */
ao_serial1_set_speed(AO_SERIAL_SPEED_4800);
/* Reasonable serial parameters */
U1UCR = (UxUCR_FLUSH |
#if HAS_SERIAL_1_HW_FLOW
UxUCR_FLOW_ENABLE |
#else
UxUCR_FLOW_DISABLE |
#endif
UxUCR_D9_EVEN_PARITY |
UxUCR_BIT9_8_BITS |
UxUCR_PARITY_DISABLE |
UxUCR_SPB_1_STOP_BIT |
UxUCR_STOP_HIGH |
UxUCR_START_LOW);
IEN0 |= IEN0_URX1IE;
IEN2 |= IEN2_UTX1IE;
#if USE_SERIAL_1_STDIN && !DELAY_SERIAL_1_STDIN
ao_add_stdio(_ao_serial1_pollchar,
ao_serial1_putchar,
NULL);
#endif
#endif /* HAS_SERIAL_1 */
}
|
