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[/] [s6soc/] [trunk/] [sw/] [dev/] [doorbell2.c] - Blame information for rev 15

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////////////////////////////////////////////////////////////////////////////////
//
// Filename:    doorbell2.c
//
// Project:     CMod S6 System on a Chip, ZipCPU demonstration project
//
// Purpose:     A modification to the original doorbell.c program.
//              seconds.  Listening to that test is ... getting old.
//
//      Let's let this one do the following:
//              1. Display the time on the display (it will be impossible to
//                      change the time, sadly, but we can at least display it.)
//              2. On button press ...
//                      - Play the doorbell sound
//                      - Display "Doorbell!\n" on the Display, clearing the
//                              time
//                      - Send "Doorbell\n"  to the UART, and then keeping the
//                              UART silent for 30 seconds.
//              4. Send the time to the UART as well, but only once a minute.
//                      (and that if the Doorbell hasn't been rung in the last
//                      30 seconds ...)
//
// Creator:     Dan Gisselquist, Ph.D.
//              Gisselquist Technology, LLC
//
////////////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2015-2016, Gisselquist Technology, LLC
//
// This program is free software (firmware): 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 3 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 MERCHANTIBILITY 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.  (It's in the $(ROOT)/doc directory, run make with no
// target there if the PDF file isn't present.)  If not, see
// <http://www.gnu.org/licenses/> for a copy.
//
// License:     GPL, v3, as defined and found on www.gnu.org,
//              http://www.gnu.org/licenses/gpl.html
//
//
////////////////////////////////////////////////////////////////////////////////
//
//
#include "asmstartup.h"
#include "board.h"
#include "rtcsim.h"
#include "display.h"
 
#include "samples.c"
 
void    zip_halt(void);
 
void    build_dpymsg(char *msg, unsigned clkval);
void    build_uartmsg(char *msg, unsigned clkval);
void    showval(int val);
void    txval(int val);
 
void entry(void) {
        register IOSPACE        *sys = (IOSPACE *)0x0100;
        char    dpymsg[16], *dpyptr;
        char    uartmsg[40], *uartptr;
        int     newmsgtime = 0, leastmsgtime = -1, lstmsgtime = 0;
 
        dpymsg[0] = 0;
        dpyptr = dpymsg;
 
        uartmsg[0] = 0;
        build_uartmsg(uartmsg, 0);
        uartptr = uartmsg;
 
        sys->io_timb = 0;
        sys->io_pic = 0x07fffffff; // Acknowledge and turn off all interrupts
 
        sys->io_spio = 0x0f4;
        newmsgtime = sys->io_tima;
        leastmsgtime = -1;
        lstmsgtime = newmsgtime;
        while(1) {
                int     seconds, pic;
                const int       *sptr;
 
                // LED's off ... nothing to report
                sys->io_spio = 0x0f0;
 
                // Turn the audio off (initially)
                sys->io_pwm_audio = 0x0018000;
 
                // Set for one ticks per second, 80M clocks per tick
                sys->io_tima = TM_ONE_SECOND | TM_REPEAT;
 
                // We start by waiting for a doorbell
                while(((pic=sys->io_pic) & INT_BUTTON)==0) {
                        if (uartmsg[10] == 0) {
                                sys->io_spio = 0x0fe;
                                zip_halt();
                        }
                        if (pic & INT_TIMA) {// top of second
                                sys->io_pic = INT_TIMA;
                                rtcclock = rtcnext(rtcclock);
 
                                // Turn all LED off (again)
                                sys->io_spio = 0x0f0;
                                if (*dpyptr == '\0') {
                                        // Build a message for the display
                                        build_dpymsg(dpymsg, rtcclock);
                                        dpyptr = dpymsg;
                                }if(((rtcclock & 0x0ff)==0)&&(*uartptr=='\0')){
                                        build_uartmsg(uartmsg, rtcclock);
                                        uartptr = uartmsg;
 
                                        // Turn one LED on--top of minute
                                        sys->io_spio = 0x0f1;
                                        newmsgtime = sys->io_tima;
                                        lstmsgtime = -1;
                                        leastmsgtime = -1;
                                }
                        }
                        /*
                        if (uartmsg[10] == 0) {
                                sys->io_spio = 0x0fc;
                                zip_halt();
                        }
                        */
                        if (*uartptr) {
                                if (pic & INT_UARTTX) {
                                        sys->io_uart = *uartptr++;
                                        sys->io_spio = 0x22;
                                        sys->io_pic = INT_UARTTX;
                                        if (uartptr > &uartmsg[13]) {
                                                sys->io_spio = 0x0fd;
                                                zip_halt();
                                        }
 
                                        if (lstmsgtime != -1) {
                                                int tmp;
                                                tmp = (lstmsgtime-sys->io_tima);
                                                if ((leastmsgtime<0)||(tmp<leastmsgtime))
                                                        leastmsgtime = tmp;
                                        } lstmsgtime = sys->io_tima;
                                }
                        } else {
                                sys->io_spio = 0x20;
                                /*
                                if (newmsgtime != 0) {
                                        int thistime = sys->io_tima;
                                        thistime = newmsgtime - thistime;
                                        showval(thistime);
                                        txval(thistime);
                                        txval(leastmsgtime);
                                        txval(lstmsgtime);
                                        zip_halt();
                                        newmsgtime = 0;
                                }
                                for(int i=0; i<12; i++)
                                        if (uartmsg[i] == 0) {
                                                sys->io_spio = i+0xf0;
                                                zip_halt();
                                        }
                                */
                        }
                        if (*dpyptr) {
                                // This will take a long time.  It should be an
                                // interruptable task ... but, sigh, we're not
                                // there yet.
                                dispchar(*dpyptr++);
                                sys->io_spio = 0x44;
                        } else {
                                sys->io_spio = 0x40;
                        } // sys->io_pic = (pic & (INT_TIMA|INT_UARTTX));
                }
 
                // DOORBELL!!!!!!
                // Set the Display message
                dpymsg[0] = (0x1b<<24)|('['<<16)|('j'<<8)|'D';
                dpymsg[1] = ('o'<<24)|('o'<<16)|('r'<<8)|'b';
                dpymsg[2] = ('e'<<24)|('l'<<16)|('l'<<8)|'!';
                dpymsg[3] = 0;
                dpyptr = dpymsg;
                // And the UART message / 18 characters
                uartptr = uartmsg;
                *uartptr++ = '\r'; *uartptr++ = '\n';
                *uartptr++ = 'D';
                *uartptr++ = 'o';
                *uartptr++ = 'o';
                *uartptr++ = 'r';
                *uartptr++ = 'b';
                *uartptr++ = 'e';
                *uartptr++ = 'l';
                *uartptr++ = 'l';
                *uartptr++ = '!';
                *uartptr++ = '\r'; *uartptr++ = '\n';
                *uartptr++ = '\r'; *uartptr++ = '\n';
                *uartptr++ = '\0';
                uartptr = uartmsg;
 
 
                seconds = 0;
                sys->io_spio = 0x0ff; // All LED's on: we got one!
                sptr = sound_data;
                sys->io_pwm_audio = 0x0310000; // Turn on the audio
                while(sptr < &sound_data[NSAMPLE_WORDS]) {
                        do {
                                pic = sys->io_pic;
                                if (pic & INT_TIMA) {
                                        sys->io_pic = INT_TIMA;
                                        seconds++;
                                        rtcclock = rtcnext(rtcclock);
                                } if ((pic & INT_UARTTX)&&(*uartptr)) {
                                        sys->io_uart = *uartptr++;
                                        sys->io_pic = INT_UARTTX;
                                        sys->io_spio = 0x22;
                                } else if (!*uartptr)
                                        sys->io_spio = 0x20;
                                if (*dpyptr) {
                                // This will take a long time.  It should be an
                                // interruptable task ... but, sigh, we're not
                                // there yet.
                                        dispchar(*dpyptr++);
                                        sys->io_spio = 0x44;
                                } else
                                        sys->io_spio = 0x40;
                        } while((pic & INT_AUDIO)==0);
                        sys->io_pwm_audio = (*sptr >> 16)&0x0ffff;
                        // Now, turn off the audio interrupt since it doesn't
                        // reset itself ...
                        sys->io_pic = INT_AUDIO;
 
                        do {
                                pic = sys->io_pic;
 
                                if (pic & INT_TIMA) {
                                        sys->io_pic = INT_TIMA;
                                        seconds++;
                                        rtcclock = rtcnext(rtcclock);
                                } if ((pic & INT_UARTTX)&&(*uartptr)) {
                                        sys->io_uart = *uartptr++;
                                        sys->io_pic = INT_UARTTX;
                                        sys->io_spio = 0x22;
                                } else if (!*uartptr)
                                        sys->io_spio = 0x20;
                                if (*dpyptr) {
                                // This will take a long time.  It should be an
                                // interruptable task ... but, sigh, we're not
                                // there yet.
                                        dispchar(*dpyptr++);
                                        sys->io_spio = 0x44;
                                } else
                                        sys->io_spio = 0x40;
                        } while((pic & INT_AUDIO)==0);
                        sys->io_pwm_audio = (*sptr++) & 0x0ffff;
 
                        // and turn off the audio interrupt again ...
                        sys->io_pic = INT_AUDIO;
                } sys->io_pic = INT_BUTTON;
 
                // Now we wait for the end of our 30 second window
                sys->io_spio = 0x0f8;
                sys->io_pwm_audio = 0x018000; // Turn off the Audio device
                while(seconds < 30) {
                        pic = sys->io_pic;
                        if (pic & INT_TIMA) {
                                sys->io_pic = INT_TIMA;
                                seconds++;
                                rtcclock = rtcnext(rtcclock);
                        } if (pic & INT_BUTTON) {
                                sys->io_pic = INT_BUTTON;
                                seconds = 0;
                        }
                } sys->io_pic = INT_BUTTON;
        }
}
 
void    build_dpymsg(char *msg, unsigned clk) {
        *msg++ = (0x1b<<24)|('['<<16)|('j'<<8)|'C'; // Clear, and start 'C'
        *msg++ = ('l'<<24)|('o'<<16)|('c'<<8)|'k';
        *msg = (' '<<24)|(':'<<16)|(' '<<8);
        if ((clk>>20)&0x0f)
                *msg++ |= (((clk>>20)&0x0f)+'0');
        else
                *msg++ |= ' ';
        *msg++ = ((((clk>>16)&0x0f)+'0')<<24)
                |(':'<<16)
                |((((clk>>12)&0x0f)+'0')<< 8)   // Minutes
                |((((clk>> 8)&0x0f)+'0')    );
        *msg++ = (':'<<24)
                |((((clk>> 4)&0x0f)+'0')<<16)   // Seconds
                |((((clk    )&0x0f)+'0')<< 8);
        *msg++ = 0;
        *msg++ = 0;
        *msg++ = 0;
        *msg++ = 0;
}
 
void    build_uartmsg(char *msg, unsigned clk) {
        *msg++ = 'T';                   // 0
        *msg++ = 'i';                   // 1
        *msg++ = 'm';                   // 2
        *msg++ = 'e';                   // 3
        *msg++ = ':';                   // 4
        *msg++ = ' ';
        *msg++ = ((clk>>20)&0x03)+'0'; // Hrs
        *msg++ = ((clk>>16)&0x0f)+'0';
        *msg++ = ':';
        *msg++ = ((clk>>12)&0x0f)+'0'; // Mins
        *msg++ = ((clk>> 8)&0x0f)+'0';
        *msg++ = '\r';                  // 11
        *msg++ = '\n';                  // 12
        *msg++ = '\0';
        *msg++ = '\0';
}
 
void    showval(int val) {
        // Clear and home
        dispchar(0x1b);
        dispchar('[');
        dispchar('j');
        for(int i=28; i>=0; i-=4) {
                int ch = ((val>>i)&0x0f)+'0';
                if (ch > '9')
                        ch = ch - '0'+'A'-10;
                dispchar(ch);
        }
}
 
void    txch(int val) {
        register IOSPACE        *sys = (IOSPACE *)0x0100;
 
        // To read whether or not the transmitter is ready, you must first
        // clear the interrupt bit.
        sys->io_pic = INT_UARTTX;
        for(int i=0; i<5000; i++)
                asm("noop");
        sys->io_pic = INT_UARTTX;
        // If the interrupt bit sets itself again immediately, the transmitter
        // is ready.  Otherwise, wait until the transmitter becomes ready.
        while((sys->io_pic&INT_UARTTX)==0)
                ;
        sys->io_uart = (val&0x0ff);
        // Give the transmitter a chance to finish, and then to create an
        // interrupt when done
        sys->io_pic = INT_UARTTX;
}
 
void    txval(int val) {
        txch('\r');
        txch('\n');
        txch('0');
        txch('x');
        for(int i=28; i>=0; i-=4) {
                int ch = ((val>>i)&0x0f)+'0';
                if (ch > '9')
                        ch = ch - '0'+'A'-10;
                txch(ch);
        }
}
 
// PPONP16P
// 00120O91
// 00120NM3
// 00120E91 = 1183377 ~= 91029 / char, at 0x208d 8333/baud, 83,330 per char

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[/] [s6soc/] [trunk/] [sw/] [dev/] [doorbell2.c] - Blame information for rev 15

Line No.	Rev	Author	Line
1	15	dgisselq	`////////////////////////////////////////////////////////////////////////////////`
2			`//`
3			`// Filename: doorbell2.c`
4			`//`
5			`// Project: CMod S6 System on a Chip, ZipCPU demonstration project`
6			`//`
7			`// Purpose: A modification to the original doorbell.c program.`
8			`// seconds. Listening to that test is ... getting old.`
9			`//`
10			`// Let's let this one do the following:`
11			`// 1. Display the time on the display (it will be impossible to`
12			`// change the time, sadly, but we can at least display it.)`
13			`// 2. On button press ...`
14			`// - Play the doorbell sound`
15			`// - Display "Doorbell!\n" on the Display, clearing the`
16			`// time`
17			`// - Send "Doorbell\n" to the UART, and then keeping the`
18			`// UART silent for 30 seconds.`
19			`// 4. Send the time to the UART as well, but only once a minute.`
20			`// (and that if the Doorbell hasn't been rung in the last`
21			`// 30 seconds ...)`
22			`//`
23			`// Creator: Dan Gisselquist, Ph.D.`
24			`// Gisselquist Technology, LLC`
25			`//`
26			`////////////////////////////////////////////////////////////////////////////////`
27			`//`
28			`// Copyright (C) 2015-2016, Gisselquist Technology, LLC`
29			`//`
30			`// This program is free software (firmware): you can redistribute it and/or`
31			`// modify it under the terms of the GNU General Public License as published`
32			`// by the Free Software Foundation, either version 3 of the License, or (at`
33			`// your option) any later version.`
34			`//`
35			`// This program is distributed in the hope that it will be useful, but WITHOUT`
36			`// ANY WARRANTY; without even the implied warranty of MERCHANTIBILITY or`
37			`// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License`
38			`// for more details.`
39			`//`
40			`// You should have received a copy of the GNU General Public License along`
41			`// with this program. (It's in the $(ROOT)/doc directory, run make with no`
42			`// target there if the PDF file isn't present.) If not, see`
43			`// <http://www.gnu.org/licenses/> for a copy.`
44			`//`
45			`// License: GPL, v3, as defined and found on www.gnu.org,`
46			`// http://www.gnu.org/licenses/gpl.html`
47			`//`
48			`//`
49			`////////////////////////////////////////////////////////////////////////////////`
50			`//`
51			`//`
52			`#include "asmstartup.h"`
53			`#include "board.h"`
54			`#include "rtcsim.h"`
55			`#include "display.h"`
56
57			`#include "samples.c"`
58
59			`void zip_halt(void);`
60
61			`void build_dpymsg(char *msg, unsigned clkval);`
62			`void build_uartmsg(char *msg, unsigned clkval);`
63			`void showval(int val);`
64			`void txval(int val);`
65
66			`void entry(void) {`
67			`register IOSPACE sys = (IOSPACE )0x0100;`
68			`char dpymsg[16], *dpyptr;`
69			`char uartmsg[40], *uartptr;`
70			`int newmsgtime = 0, leastmsgtime = -1, lstmsgtime = 0;`
71
72			`dpymsg[0] = 0;`
73			`dpyptr = dpymsg;`
74
75			`uartmsg[0] = 0;`
76			`build_uartmsg(uartmsg, 0);`
77			`uartptr = uartmsg;`
78
79			`sys->io_timb = 0;`
80			`sys->io_pic = 0x07fffffff; // Acknowledge and turn off all interrupts`
81
82			`sys->io_spio = 0x0f4;`
83			`newmsgtime = sys->io_tima;`
84			`leastmsgtime = -1;`
85			`lstmsgtime = newmsgtime;`
86			`while(1) {`
87			`int seconds, pic;`
88			`const int *sptr;`
89
90			`// LED's off ... nothing to report`
91			`sys->io_spio = 0x0f0;`
92
93			`// Turn the audio off (initially)`
94			`sys->io_pwm_audio = 0x0018000;`
95
96			`// Set for one ticks per second, 80M clocks per tick`
97			`sys->io_tima = TM_ONE_SECOND \| TM_REPEAT;`
98
99			`// We start by waiting for a doorbell`
100			`while(((pic=sys->io_pic) & INT_BUTTON)==0) {`
101			`if (uartmsg[10] == 0) {`
102			`sys->io_spio = 0x0fe;`
103			`zip_halt();`
104			`}`
105			`if (pic & INT_TIMA) {// top of second`
106			`sys->io_pic = INT_TIMA;`
107			`rtcclock = rtcnext(rtcclock);`
108
109			`// Turn all LED off (again)`
110			`sys->io_spio = 0x0f0;`
111			`if (*dpyptr == '\0') {`
112			`// Build a message for the display`
113			`build_dpymsg(dpymsg, rtcclock);`
114			`dpyptr = dpymsg;`
115			`}if(((rtcclock & 0x0ff)==0)&&(*uartptr=='\0')){`
116			`build_uartmsg(uartmsg, rtcclock);`
117			`uartptr = uartmsg;`
118
119			`// Turn one LED on--top of minute`
120			`sys->io_spio = 0x0f1;`
121			`newmsgtime = sys->io_tima;`
122			`lstmsgtime = -1;`
123			`leastmsgtime = -1;`
124			`}`
125			`}`
126			`/*`
127			`if (uartmsg[10] == 0) {`
128			`sys->io_spio = 0x0fc;`
129			`zip_halt();`
130			`}`
131			`*/`
132			`if (*uartptr) {`
133			`if (pic & INT_UARTTX) {`
134			`sys->io_uart = *uartptr++;`
135			`sys->io_spio = 0x22;`
136			`sys->io_pic = INT_UARTTX;`
137			`if (uartptr > &uartmsg[13]) {`
138			`sys->io_spio = 0x0fd;`
139			`zip_halt();`
140			`}`
141
142			`if (lstmsgtime != -1) {`
143			`int tmp;`
144			`tmp = (lstmsgtime-sys->io_tima);`
145			`if ((leastmsgtime<0)\|\|(tmp<leastmsgtime))`
146			`leastmsgtime = tmp;`
147			`} lstmsgtime = sys->io_tima;`
148			`}`
149			`} else {`
150			`sys->io_spio = 0x20;`
151			`/*`
152			`if (newmsgtime != 0) {`
153			`int thistime = sys->io_tima;`
154			`thistime = newmsgtime - thistime;`
155			`showval(thistime);`
156			`txval(thistime);`
157			`txval(leastmsgtime);`
158			`txval(lstmsgtime);`
159			`zip_halt();`
160			`newmsgtime = 0;`
161			`}`
162			`for(int i=0; i<12; i++)`
163			`if (uartmsg[i] == 0) {`
164			`sys->io_spio = i+0xf0;`
165			`zip_halt();`
166			`}`
167			`*/`
168			`}`
169			`if (*dpyptr) {`
170			`// This will take a long time. It should be an`
171			`// interruptable task ... but, sigh, we're not`
172			`// there yet.`
173			`dispchar(*dpyptr++);`
174			`sys->io_spio = 0x44;`
175			`} else {`
176			`sys->io_spio = 0x40;`
177			`} // sys->io_pic = (pic & (INT_TIMA\|INT_UARTTX));`
178			`}`
179
180			`// DOORBELL!!!!!!`
181			`// Set the Display message`
182			`dpymsg[0] = (0x1b<<24)\|('['<<16)\|('j'<<8)\|'D';`
183			`dpymsg[1] = ('o'<<24)\|('o'<<16)\|('r'<<8)\|'b';`
184			`dpymsg[2] = ('e'<<24)\|('l'<<16)\|('l'<<8)\|'!';`
185			`dpymsg[3] = 0;`
186			`dpyptr = dpymsg;`
187			`// And the UART message / 18 characters`
188			`uartptr = uartmsg;`
189			`uartptr++ = '\r'; uartptr++ = '\n';`
190			`*uartptr++ = 'D';`
191			`*uartptr++ = 'o';`
192			`*uartptr++ = 'o';`
193			`*uartptr++ = 'r';`
194			`*uartptr++ = 'b';`
195			`*uartptr++ = 'e';`
196			`*uartptr++ = 'l';`
197			`*uartptr++ = 'l';`
198			`*uartptr++ = '!';`
199			`uartptr++ = '\r'; uartptr++ = '\n';`
200			`uartptr++ = '\r'; uartptr++ = '\n';`
201			`*uartptr++ = '\0';`
202			`uartptr = uartmsg;`
203
204
205			`seconds = 0;`
206			`sys->io_spio = 0x0ff; // All LED's on: we got one!`
207			`sptr = sound_data;`
208			`sys->io_pwm_audio = 0x0310000; // Turn on the audio`
209			`while(sptr < &sound_data[NSAMPLE_WORDS]) {`
210			`do {`
211			`pic = sys->io_pic;`
212			`if (pic & INT_TIMA) {`
213			`sys->io_pic = INT_TIMA;`
214			`seconds++;`
215			`rtcclock = rtcnext(rtcclock);`
216			`} if ((pic & INT_UARTTX)&&(*uartptr)) {`
217			`sys->io_uart = *uartptr++;`
218			`sys->io_pic = INT_UARTTX;`
219			`sys->io_spio = 0x22;`
220			`} else if (!*uartptr)`
221			`sys->io_spio = 0x20;`
222			`if (*dpyptr) {`
223			`// This will take a long time. It should be an`
224			`// interruptable task ... but, sigh, we're not`
225			`// there yet.`
226			`dispchar(*dpyptr++);`
227			`sys->io_spio = 0x44;`
228			`} else`
229			`sys->io_spio = 0x40;`
230			`} while((pic & INT_AUDIO)==0);`
231			`sys->io_pwm_audio = (*sptr >> 16)&0x0ffff;`
232			`// Now, turn off the audio interrupt since it doesn't`
233			`// reset itself ...`
234			`sys->io_pic = INT_AUDIO;`
235
236			`do {`
237			`pic = sys->io_pic;`
238
239			`if (pic & INT_TIMA) {`
240			`sys->io_pic = INT_TIMA;`
241			`seconds++;`
242			`rtcclock = rtcnext(rtcclock);`
243			`} if ((pic & INT_UARTTX)&&(*uartptr)) {`
244			`sys->io_uart = *uartptr++;`
245			`sys->io_pic = INT_UARTTX;`
246			`sys->io_spio = 0x22;`
247			`} else if (!*uartptr)`
248			`sys->io_spio = 0x20;`
249			`if (*dpyptr) {`
250			`// This will take a long time. It should be an`
251			`// interruptable task ... but, sigh, we're not`
252			`// there yet.`
253			`dispchar(*dpyptr++);`
254			`sys->io_spio = 0x44;`
255			`} else`
256			`sys->io_spio = 0x40;`
257			`} while((pic & INT_AUDIO)==0);`
258			`sys->io_pwm_audio = (*sptr++) & 0x0ffff;`
259
260			`// and turn off the audio interrupt again ...`
261			`sys->io_pic = INT_AUDIO;`
262			`} sys->io_pic = INT_BUTTON;`
263
264			`// Now we wait for the end of our 30 second window`
265			`sys->io_spio = 0x0f8;`
266			`sys->io_pwm_audio = 0x018000; // Turn off the Audio device`
267			`while(seconds < 30) {`
268			`pic = sys->io_pic;`
269			`if (pic & INT_TIMA) {`
270			`sys->io_pic = INT_TIMA;`
271			`seconds++;`
272			`rtcclock = rtcnext(rtcclock);`
273			`} if (pic & INT_BUTTON) {`
274			`sys->io_pic = INT_BUTTON;`
275			`seconds = 0;`
276			`}`
277			`} sys->io_pic = INT_BUTTON;`
278			`}`
279			`}`
280
281			`void build_dpymsg(char *msg, unsigned clk) {`
282			`*msg++ = (0x1b<<24)\|('['<<16)\|('j'<<8)\|'C'; // Clear, and start 'C'`
283			`*msg++ = ('l'<<24)\|('o'<<16)\|('c'<<8)\|'k';`
284			`*msg = (' '<<24)\|(':'<<16)\|(' '<<8);`
285			`if ((clk>>20)&0x0f)`
286			`*msg++ \|= (((clk>>20)&0x0f)+'0');`
287			`else`
288			`*msg++ \|= ' ';`
289			`*msg++ = ((((clk>>16)&0x0f)+'0')<<24)`
290			`\|(':'<<16)`
291			`\|((((clk>>12)&0x0f)+'0')<< 8) // Minutes`
292			`\|((((clk>> 8)&0x0f)+'0') );`
293			`*msg++ = (':'<<24)`
294			`\|((((clk>> 4)&0x0f)+'0')<<16) // Seconds`
295			`\|((((clk )&0x0f)+'0')<< 8);`
296			`*msg++ = 0;`
297			`*msg++ = 0;`
298			`*msg++ = 0;`
299			`*msg++ = 0;`
300			`}`
301
302			`void build_uartmsg(char *msg, unsigned clk) {`
303			`*msg++ = 'T'; // 0`
304			`*msg++ = 'i'; // 1`
305			`*msg++ = 'm'; // 2`
306			`*msg++ = 'e'; // 3`
307			`*msg++ = ':'; // 4`
308			`*msg++ = ' ';`
309			`*msg++ = ((clk>>20)&0x03)+'0'; // Hrs`
310			`*msg++ = ((clk>>16)&0x0f)+'0';`
311			`*msg++ = ':';`
312			`*msg++ = ((clk>>12)&0x0f)+'0'; // Mins`
313			`*msg++ = ((clk>> 8)&0x0f)+'0';`
314			`*msg++ = '\r'; // 11`
315			`*msg++ = '\n'; // 12`
316			`*msg++ = '\0';`
317			`*msg++ = '\0';`
318			`}`
319
320			`void showval(int val) {`
321			`// Clear and home`
322			`dispchar(0x1b);`
323			`dispchar('[');`
324			`dispchar('j');`
325			`for(int i=28; i>=0; i-=4) {`
326			`int ch = ((val>>i)&0x0f)+'0';`
327			`if (ch > '9')`
328			`ch = ch - '0'+'A'-10;`
329			`dispchar(ch);`
330			`}`
331			`}`
332
333			`void txch(int val) {`
334			`register IOSPACE sys = (IOSPACE )0x0100;`
335
336			`// To read whether or not the transmitter is ready, you must first`
337			`// clear the interrupt bit.`
338			`sys->io_pic = INT_UARTTX;`
339			`for(int i=0; i<5000; i++)`
340			`asm("noop");`
341			`sys->io_pic = INT_UARTTX;`
342			`// If the interrupt bit sets itself again immediately, the transmitter`
343			`// is ready. Otherwise, wait until the transmitter becomes ready.`
344			`while((sys->io_pic&INT_UARTTX)==0)`
345			`;`
346			`sys->io_uart = (val&0x0ff);`
347			`// Give the transmitter a chance to finish, and then to create an`
348			`// interrupt when done`
349			`sys->io_pic = INT_UARTTX;`
350			`}`
351
352			`void txval(int val) {`
353			`txch('\r');`
354			`txch('\n');`
355			`txch('0');`
356			`txch('x');`
357			`for(int i=28; i>=0; i-=4) {`
358			`int ch = ((val>>i)&0x0f)+'0';`
359			`if (ch > '9')`
360			`ch = ch - '0'+'A'-10;`
361			`txch(ch);`
362			`}`
363			`}`
364
365			`// PPONP16P`
366			`// 00120O91`
367			`// 00120NM3`
368			`// 00120E91 = 1183377 ~= 91029 / char, at 0x208d 8333/baud, 83,330 per char`