Shift Registers - Tutorial 3, Using Timers

1//
2//   Tutorial 3 - use of ez_SIPO8 library,
3//   1x physical SIPO,  and use of SIPO8 timers to control SIPO outputs with time
4//
5//   Ron D Bentley,  Stafford, UK
6//   April 2021
7//
8//   This example and code is in the public  domain and
9//   may be used without restriction and without warranty.
10//
11
12#include  <ez_SIPO8_lib.h>
13
14#define Max_SIPOs  1  // one virtual SIPO for this tutorial
15#define  Max_timers 8  // 8 timers required to map a complete 8bit SIPO
16
17// initiate  the class for Max SIPOs/timers required
18SIPO8 my_SIPOs(Max_SIPOs, Max_timers);
19
20int  bank0_id;  // used to keep the SIPO bank id
21//
22// setup pin/LED flash data
23uint8_t  timer;
24uint32_t timer_intervals[Max_timers] = {
25  300, 400, 500, 600, 700,  800, 900, 1000 // millisecond elapse timer values
26};
27uint8_t timer_pins[Max_timers]  = {
28  0, 1, 2, 3, 4, 5, 6, 7 // SIPO output pin absolute addresses
29};
30
31void  setup() {
32  Serial.begin(9600);
33  // create bank, params are:
34  // data  pin, clock pin, latch pin, number of SIPOs this bank
35  bank0_id = my_SIPOs.create_bank(8,  10, 9, 1); 
36  if (bank0_id == create_bank_failure) {
37    Serial.println(F("\
38failed  to create bank"));
39    Serial.flush();
40    exit(0);
41  }
42  // print  the bank data for confirmation/inspection
43  my_SIPOs.print_SIPO_data();
44}
45
46void  loop() {
47  // start by setting all SIPO outputs to low (off)
48  my_SIPOs.set_all_array_pins(LOW);//  set all declared virtual output pins LOW/off
49  my_SIPOs.xfer_array(LSBFIRST);   // move virtual pin statuses to real SIPO output pins
50  //
51  // start all  timers
52  for (timer = 0; timer < Max_timers; timer++) {
53    my_SIPOs.SIPO8_start_timer(timer);
54  }
55  timer = 0; // start checking at first timer
56  do {
57    // check each  timer for elapse and, if elapsed, invert the timer's output pin
58    // and reset  the timer
59    if (my_SIPOs.SIPO8_timer_elapsed(timer, timer_intervals[timer])  == elapsed) {
60      my_SIPOs.invert_array_pin(timer_pins[timer]); // invert the  pin associated with this timer
61      my_SIPOs.xfer_array(MSBFIRST);                //  update physical SIPO outputs
62      my_SIPOs.SIPO8_start_timer(timer);            //  reset/restart the current timer
63    }
64    timer++;  // move on to next timer
65    if (timer >= Max_timers) timer = 0;  // wrap around to beginning
66  } while  (true);
67}
68

1//
2//   Tutorial 3 - use of ez_SIPO8 library,
3//   1x physical SIPO,
4  and use of SIPO8 timers to control SIPO outputs with time
5//
6//   Ron D Bentley,
7  Stafford, UK
8//   April 2021
9//
10//   This example and code is in the public
11  domain and
12//   may be used without restriction and without warranty.
13//
14
15#include
16  <ez_SIPO8_lib.h>
17
18#define Max_SIPOs  1  // one virtual SIPO for this tutorial
19#define
20  Max_timers 8  // 8 timers required to map a complete 8bit SIPO
21
22// initiate
23  the class for Max SIPOs/timers required
24SIPO8 my_SIPOs(Max_SIPOs, Max_timers);
25
26int
27  bank0_id;  // used to keep the SIPO bank id
28//
29// setup pin/LED flash data
30uint8_t
31  timer;
32uint32_t timer_intervals[Max_timers] = {
33  300, 400, 500, 600, 700,
34  800, 900, 1000 // millisecond elapse timer values
35};
36uint8_t timer_pins[Max_timers]
37  = {
38  0, 1, 2, 3, 4, 5, 6, 7 // SIPO output pin absolute addresses
39};
40
41void
42  setup() {
43  Serial.begin(9600);
44  // create bank, params are:
45  // data
46  pin, clock pin, latch pin, number of SIPOs this bank
47  bank0_id = my_SIPOs.create_bank(8,
48  10, 9, 1); 
49  if (bank0_id == create_bank_failure) {
50    Serial.println(F("\
51failed
52  to create bank"));
53    Serial.flush();
54    exit(0);
55  }
56  // print
57  the bank data for confirmation/inspection
58  my_SIPOs.print_SIPO_data();
59}
60
61void
62  loop() {
63  // start by setting all SIPO outputs to low (off)
64  my_SIPOs.set_all_array_pins(LOW);//
65  set all declared virtual output pins LOW/off
66  my_SIPOs.xfer_array(LSBFIRST);
67   // move virtual pin statuses to real SIPO output pins
68  //
69  // start all
70  timers
71  for (timer = 0; timer < Max_timers; timer++) {
72    my_SIPOs.SIPO8_start_timer(timer);
73
74  }
75  timer = 0; // start checking at first timer
76  do {
77    // check each
78  timer for elapse and, if elapsed, invert the timer's output pin
79    // and reset
80  the timer
81    if (my_SIPOs.SIPO8_timer_elapsed(timer, timer_intervals[timer])
82  == elapsed) {
83      my_SIPOs.invert_array_pin(timer_pins[timer]); // invert the
84  pin associated with this timer
85      my_SIPOs.xfer_array(MSBFIRST);                //
86  update physical SIPO outputs
87      my_SIPOs.SIPO8_start_timer(timer);            //
88  reset/restart the current timer
89    }
90    timer++;  // move on to next timer
91
92    if (timer >= Max_timers) timer = 0;  // wrap around to beginning
93  } while
94  (true);
95}
96