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✨ MAX7219 idle profiler (#24375)

FB4S_WIFI
tombrazier 2 years ago
committed by Scott Lahteine
parent
537af0bb03
commit
4694a7fe74
4 changed files with 150 additions and 48 deletions
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  1. 12
      Marlin/Configuration_adv.h
  2. 4
      Marlin/src/MarlinCore.cpp
  3. 104
      Marlin/src/feature/max7219.cpp
  4. 78
      Marlin/src/feature/max7219.h

12
Marlin/Configuration_adv.h
View File

@ -3595,7 +3595,7 @@
// ESP32: If SPINDLE_LASER_PWM_PIN is onboard then <=78125Hz. For I2S expander // ESP32: If SPINDLE_LASER_PWM_PIN is onboard then <=78125Hz. For I2S expander
// the frequency determines the PWM resolution. 2500Hz = 0-100, 977Hz = 0-255, ... // the frequency determines the PWM resolution. 2500Hz = 0-100, 977Hz = 0-255, ...
// (250000 / SPINDLE_LASER_FREQUENCY) = max value. // (250000 / SPINDLE_LASER_FREQUENCY) = max value.
#endif #endif
//#define AIR_EVACUATION // Cutter Vacuum / Laser Blower motor control with G-codes M10-M11 //#define AIR_EVACUATION // Cutter Vacuum / Laser Blower motor control with G-codes M10-M11
#if ENABLED(AIR_EVACUATION) #if ENABLED(AIR_EVACUATION)
@ -4289,7 +4289,8 @@
#define MAX7219_NUMBER_UNITS 1 // Number of Max7219 units in chain. #define MAX7219_NUMBER_UNITS 1 // Number of Max7219 units in chain.
#define MAX7219_ROTATE 0 // Rotate the display clockwise (in multiples of +/- 90°) #define MAX7219_ROTATE 0 // Rotate the display clockwise (in multiples of +/- 90°)
// connector at: right=0 bottom=-90 top=90 left=180 // connector at: right=0 bottom=-90 top=90 left=180
//#define MAX7219_REVERSE_ORDER // The individual LED matrix units may be in reversed order //#define MAX7219_REVERSE_ORDER // The order of the LED matrix units may be reversed
//#define MAX7219_REVERSE_EACH // The LEDs in each matrix unit row may be reversed
//#define MAX7219_SIDE_BY_SIDE // Big chip+matrix boards can be chained side-by-side //#define MAX7219_SIDE_BY_SIDE // Big chip+matrix boards can be chained side-by-side
/** /**
@ -4297,12 +4298,15 @@
* If you add more debug displays, be careful to avoid conflicts! * If you add more debug displays, be careful to avoid conflicts!
*/ */
#define MAX7219_DEBUG_PRINTER_ALIVE // Blink corner LED of 8x8 matrix to show that the firmware is functioning #define MAX7219_DEBUG_PRINTER_ALIVE // Blink corner LED of 8x8 matrix to show that the firmware is functioning
#define MAX7219_DEBUG_PLANNER_HEAD 3 // Show the planner queue head position on this and the next LED matrix row #define MAX7219_DEBUG_PLANNER_HEAD 2 // Show the planner queue head position on this and the next LED matrix row
#define MAX7219_DEBUG_PLANNER_TAIL 5 // Show the planner queue tail position on this and the next LED matrix row #define MAX7219_DEBUG_PLANNER_TAIL 4 // Show the planner queue tail position on this and the next LED matrix row
#define MAX7219_DEBUG_PLANNER_QUEUE 0 // Show the current planner queue depth on this and the next LED matrix row #define MAX7219_DEBUG_PLANNER_QUEUE 0 // Show the current planner queue depth on this and the next LED matrix row
// If you experience stuttering, reboots, etc. this option can reveal how // If you experience stuttering, reboots, etc. this option can reveal how
// tweaks made to the configuration are affecting the printer in real-time. // tweaks made to the configuration are affecting the printer in real-time.
#define MAX7219_DEBUG_PROFILE 6 // Display the fraction of CPU time spent in profiled code on this LED matrix
// row. By default idle() is profiled so this shows how "idle" the processor is.
// See class CodeProfiler.
#endif #endif
/** /**

4
Marlin/src/MarlinCore.cpp
View File

@ -776,6 +776,10 @@ inline void manage_inactivity(const bool no_stepper_sleep=false) {
* - Handle Joystick jogging * - Handle Joystick jogging
*/ */
void idle(bool no_stepper_sleep/*=false*/) { void idle(bool no_stepper_sleep/*=false*/) {
#ifdef MAX7219_DEBUG_PROFILE
CodeProfiler idle_profiler;
#endif
#if ENABLED(MARLIN_DEV_MODE) #if ENABLED(MARLIN_DEV_MODE)
static uint16_t idle_depth = 0; static uint16_t idle_depth = 0;
if (++idle_depth > 5) SERIAL_ECHOLNPGM("idle() call depth: ", idle_depth); if (++idle_depth > 5) SERIAL_ECHOLNPGM("idle() call depth: ", idle_depth);

104
Marlin/src/feature/max7219.cpp
View File

@ -62,6 +62,15 @@
#error "MAX7219_ROTATE must be a multiple of +/- 90°." #error "MAX7219_ROTATE must be a multiple of +/- 90°."
#endif #endif
#ifdef MAX7219_DEBUG_PROFILE
CodeProfiler::Mode CodeProfiler::mode = ACCUMULATE_AVERAGE;
uint8_t CodeProfiler::instance_count = 0;
uint32_t CodeProfiler::last_calc_time = micros();
uint8_t CodeProfiler::time_fraction = 0;
uint32_t CodeProfiler::total_time = 0;
uint16_t CodeProfiler::call_count = 0;
#endif
Max7219 max7219; Max7219 max7219;
uint8_t Max7219::led_line[MAX7219_LINES]; // = { 0 }; uint8_t Max7219::led_line[MAX7219_LINES]; // = { 0 };
@ -69,7 +78,7 @@ uint8_t Max7219::suspended; // = 0;
#define LINE_REG(Q) (max7219_reg_digit0 + ((Q) & 0x7)) #define LINE_REG(Q) (max7219_reg_digit0 + ((Q) & 0x7))
#if _ROT == 0 || _ROT == 270 #if (_ROT == 0 || _ROT == 270) == DISABLED(MAX7219_REVERSE_EACH)
#define _LED_BIT(Q) (7 - ((Q) & 0x7)) #define _LED_BIT(Q) (7 - ((Q) & 0x7))
#else #else
#define _LED_BIT(Q) ((Q) & 0x7) #define _LED_BIT(Q) ((Q) & 0x7)
@ -266,26 +275,27 @@ void Max7219::set(const uint8_t line, const uint8_t bits) {
#endif // MAX7219_NUMERIC #endif // MAX7219_NUMERIC
// Modify a single LED bit and send the changed line // Modify a single LED bit and send the changed line
void Max7219::led_set(const uint8_t x, const uint8_t y, const bool on) { void Max7219::led_set(const uint8_t x, const uint8_t y, const bool on, uint8_t * const rcm/*=nullptr*/) {
if (x >= MAX7219_X_LEDS || y >= MAX7219_Y_LEDS) return error(F("led_set"), x, y); if (x >= MAX7219_X_LEDS || y >= MAX7219_Y_LEDS) return error(F("led_set"), x, y);
if (BIT_7219(x, y) == on) return; if (BIT_7219(x, y) == on) return;
XOR_7219(x, y); XOR_7219(x, y);
refresh_unit_line(LED_IND(x, y)); refresh_unit_line(LED_IND(x, y));
if (rcm != nullptr) *rcm |= _BV(LED_IND(x, y) & 0x07);
} }
void Max7219::led_on(const uint8_t x, const uint8_t y) { void Max7219::led_on(const uint8_t x, const uint8_t y, uint8_t * const rcm/*=nullptr*/) {
if (x >= MAX7219_X_LEDS || y >= MAX7219_Y_LEDS) return error(F("led_on"), x, y); if (x >= MAX7219_X_LEDS || y >= MAX7219_Y_LEDS) return error(F("led_on"), x, y);
led_set(x, y, true); led_set(x, y, true, rcm);
} }
void Max7219::led_off(const uint8_t x, const uint8_t y) { void Max7219::led_off(const uint8_t x, const uint8_t y, uint8_t * const rcm/*=nullptr*/) {
if (x >= MAX7219_X_LEDS || y >= MAX7219_Y_LEDS) return error(F("led_off"), x, y); if (x >= MAX7219_X_LEDS || y >= MAX7219_Y_LEDS) return error(F("led_off"), x, y);
led_set(x, y, false); led_set(x, y, false, rcm);
} }
void Max7219::led_toggle(const uint8_t x, const uint8_t y) { void Max7219::led_toggle(const uint8_t x, const uint8_t y, uint8_t * const rcm/*=nullptr*/) {
if (x >= MAX7219_X_LEDS || y >= MAX7219_Y_LEDS) return error(F("led_toggle"), x, y); if (x >= MAX7219_X_LEDS || y >= MAX7219_Y_LEDS) return error(F("led_toggle"), x, y);
led_set(x, y, !BIT_7219(x, y)); led_set(x, y, !BIT_7219(x, y), rcm);
} }
void Max7219::send_row(const uint8_t row) { void Max7219::send_row(const uint8_t row) {
@ -448,7 +458,7 @@ void Max7219::register_setup() {
pulse_load(); // Tell the chips to load the clocked out data pulse_load(); // Tell the chips to load the clocked out data
} }
#ifdef MAX7219_INIT_TEST #if MAX7219_INIT_TEST
uint8_t test_mode = 0; uint8_t test_mode = 0;
millis_t next_patt_ms; millis_t next_patt_ms;
@ -536,13 +546,9 @@ void Max7219::init() {
register_setup(); register_setup();
LOOP_LE_N(i, 7) { // Empty registers to turn all LEDs off clear();
led_line[i] = 0x00;
send(max7219_reg_digit0 + i, 0);
pulse_load(); // Tell the chips to load the clocked out data
}
#ifdef MAX7219_INIT_TEST #if MAX7219_INIT_TEST
start_test_pattern(); start_test_pattern();
#endif #endif
} }
@ -554,41 +560,47 @@ void Max7219::init() {
*/ */
// Apply changes to update a marker // Apply changes to update a marker
void Max7219::mark16(const uint8_t pos, const uint8_t v1, const uint8_t v2) { void Max7219::mark16(const uint8_t pos, const uint8_t v1, const uint8_t v2, uint8_t * const rcm/*=nullptr*/) {
#if MAX7219_X_LEDS > 8 // At least 16 LEDs on the X-Axis. Use single line. #if MAX7219_X_LEDS > 8 // At least 16 LEDs on the X-Axis. Use single line.
led_off(v1 & 0xF, pos); led_off(v1 & 0xF, pos, rcm);
led_on(v2 & 0xF, pos); led_on(v2 & 0xF, pos, rcm);
#elif MAX7219_Y_LEDS > 8 // At least 16 LEDs on the Y-Axis. Use a single column. #elif MAX7219_Y_LEDS > 8 // At least 16 LEDs on the Y-Axis. Use a single column.
led_off(pos, v1 & 0xF); led_off(pos, v1 & 0xF, rcm);
led_on(pos, v2 & 0xF); led_on(pos, v2 & 0xF, rcm);
#else // Single 8x8 LED matrix. Use two lines to get 16 LEDs. #else // Single 8x8 LED matrix. Use two lines to get 16 LEDs.
led_off(v1 & 0x7, pos + (v1 >= 8)); led_off(v1 & 0x7, pos + (v1 >= 8), rcm);
led_on(v2 & 0x7, pos + (v2 >= 8)); led_on(v2 & 0x7, pos + (v2 >= 8), rcm);
#endif #endif
} }
// Apply changes to update a tail-to-head range // Apply changes to update a tail-to-head range
void Max7219::range16(const uint8_t y, const uint8_t ot, const uint8_t nt, const uint8_t oh, const uint8_t nh) { void Max7219::range16(const uint8_t y, const uint8_t ot, const uint8_t nt, const uint8_t oh,
const uint8_t nh, uint8_t * const rcm/*=nullptr*/) {
#if MAX7219_X_LEDS > 8 // At least 16 LEDs on the X-Axis. Use single line. #if MAX7219_X_LEDS > 8 // At least 16 LEDs on the X-Axis. Use single line.
if (ot != nt) for (uint8_t n = ot & 0xF; n != (nt & 0xF) && n != (nh & 0xF); n = (n + 1) & 0xF) if (ot != nt) for (uint8_t n = ot & 0xF; n != (nt & 0xF) && n != (nh & 0xF); n = (n + 1) & 0xF)
led_off(n & 0xF, y); led_off(n & 0xF, y, rcm);
if (oh != nh) for (uint8_t n = (oh + 1) & 0xF; n != ((nh + 1) & 0xF); n = (n + 1) & 0xF) if (oh != nh) for (uint8_t n = (oh + 1) & 0xF; n != ((nh + 1) & 0xF); n = (n + 1) & 0xF)
led_on(n & 0xF, y); led_on(n & 0xF, y, rcm);
#elif MAX7219_Y_LEDS > 8 // At least 16 LEDs on the Y-Axis. Use a single column. #elif MAX7219_Y_LEDS > 8 // At least 16 LEDs on the Y-Axis. Use a single column.
if (ot != nt) for (uint8_t n = ot & 0xF; n != (nt & 0xF) && n != (nh & 0xF); n = (n + 1) & 0xF) if (ot != nt) for (uint8_t n = ot & 0xF; n != (nt & 0xF) && n != (nh & 0xF); n = (n + 1) & 0xF)
led_off(y, n & 0xF); led_off(y, n & 0xF, rcm);
if (oh != nh) for (uint8_t n = (oh + 1) & 0xF; n != ((nh + 1) & 0xF); n = (n + 1) & 0xF) if (oh != nh) for (uint8_t n = (oh + 1) & 0xF; n != ((nh + 1) & 0xF); n = (n + 1) & 0xF)
led_on(y, n & 0xF); led_on(y, n & 0xF, rcm);
#else // Single 8x8 LED matrix. Use two lines to get 16 LEDs. #else // Single 8x8 LED matrix. Use two lines to get 16 LEDs.
if (ot != nt) for (uint8_t n = ot & 0xF; n != (nt & 0xF) && n != (nh & 0xF); n = (n + 1) & 0xF) if (ot != nt) for (uint8_t n = ot & 0xF; n != (nt & 0xF) && n != (nh & 0xF); n = (n + 1) & 0xF)
led_off(n & 0x7, y + (n >= 8)); led_off(n & 0x7, y + (n >= 8), rcm);
if (oh != nh) for (uint8_t n = (oh + 1) & 0xF; n != ((nh + 1) & 0xF); n = (n + 1) & 0xF) if (oh != nh) for (uint8_t n = (oh + 1) & 0xF; n != ((nh + 1) & 0xF); n = (n + 1) & 0xF)
led_on(n & 0x7, y + (n >= 8)); led_on(n & 0x7, y + (n >= 8), rcm);
#endif #endif
} }
// Apply changes to update a quantity // Apply changes to update a quantity
void Max7219::quantity16(const uint8_t pos, const uint8_t ov, const uint8_t nv) { void Max7219::quantity(const uint8_t pos, const uint8_t ov, const uint8_t nv, uint8_t * const rcm/*=nullptr*/) {
for (uint8_t i = _MIN(nv, ov); i < _MAX(nv, ov); i++)
led_set(i, pos, nv >= ov, rcm);
}
void Max7219::quantity16(const uint8_t pos, const uint8_t ov, const uint8_t nv, uint8_t * const rcm/*=nullptr*/) {
for (uint8_t i = _MIN(nv, ov); i < _MAX(nv, ov); i++) for (uint8_t i = _MIN(nv, ov); i < _MAX(nv, ov); i++)
led_set( led_set(
#if MAX7219_X_LEDS > 8 // At least 16 LEDs on the X-Axis. Use single line. #if MAX7219_X_LEDS > 8 // At least 16 LEDs on the X-Axis. Use single line.
@ -599,6 +611,7 @@ void Max7219::quantity16(const uint8_t pos, const uint8_t ov, const uint8_t nv)
i >> 1, pos + (i & 1) i >> 1, pos + (i & 1)
#endif #endif
, nv >= ov , nv >= ov
, rcm
); );
} }
@ -636,16 +649,20 @@ void Max7219::idle_tasks() {
register_setup(); register_setup();
} }
#ifdef MAX7219_INIT_TEST #if MAX7219_INIT_TEST
if (test_mode) { if (test_mode) {
run_test_pattern(); run_test_pattern();
return; return;
} }
#endif #endif
// suspend updates and record which lines have changed for batching later
suspended++;
uint8_t row_change_mask = 0x00;
#if ENABLED(MAX7219_DEBUG_PRINTER_ALIVE) #if ENABLED(MAX7219_DEBUG_PRINTER_ALIVE)
if (do_blink) { if (do_blink) {
led_toggle(MAX7219_X_LEDS - 1, MAX7219_Y_LEDS - 1); led_toggle(MAX7219_X_LEDS - 1, MAX7219_Y_LEDS - 1, &row_change_mask);
next_blink = ms + 1000; next_blink = ms + 1000;
} }
#endif #endif
@ -655,7 +672,7 @@ void Max7219::idle_tasks() {
static int16_t last_head_cnt = 0xF, last_tail_cnt = 0xF; static int16_t last_head_cnt = 0xF, last_tail_cnt = 0xF;
if (last_head_cnt != head || last_tail_cnt != tail) { if (last_head_cnt != head || last_tail_cnt != tail) {
range16(MAX7219_DEBUG_PLANNER_HEAD, last_tail_cnt, tail, last_head_cnt, head); range16(MAX7219_DEBUG_PLANNER_HEAD, last_tail_cnt, tail, last_head_cnt, head, &row_change_mask);
last_head_cnt = head; last_head_cnt = head;
last_tail_cnt = tail; last_tail_cnt = tail;
} }
@ -665,7 +682,7 @@ void Max7219::idle_tasks() {
#ifdef MAX7219_DEBUG_PLANNER_HEAD #ifdef MAX7219_DEBUG_PLANNER_HEAD
static int16_t last_head_cnt = 0x1; static int16_t last_head_cnt = 0x1;
if (last_head_cnt != head) { if (last_head_cnt != head) {
mark16(MAX7219_DEBUG_PLANNER_HEAD, last_head_cnt, head); mark16(MAX7219_DEBUG_PLANNER_HEAD, last_head_cnt, head, &row_change_mask);
last_head_cnt = head; last_head_cnt = head;
} }
#endif #endif
@ -673,7 +690,7 @@ void Max7219::idle_tasks() {
#ifdef MAX7219_DEBUG_PLANNER_TAIL #ifdef MAX7219_DEBUG_PLANNER_TAIL
static int16_t last_tail_cnt = 0x1; static int16_t last_tail_cnt = 0x1;
if (last_tail_cnt != tail) { if (last_tail_cnt != tail) {
mark16(MAX7219_DEBUG_PLANNER_TAIL, last_tail_cnt, tail); mark16(MAX7219_DEBUG_PLANNER_TAIL, last_tail_cnt, tail, &row_change_mask);
last_tail_cnt = tail; last_tail_cnt = tail;
} }
#endif #endif
@ -684,11 +701,26 @@ void Max7219::idle_tasks() {
static int16_t last_depth = 0; static int16_t last_depth = 0;
const int16_t current_depth = (head - tail + BLOCK_BUFFER_SIZE) & (BLOCK_BUFFER_SIZE - 1) & 0xF; const int16_t current_depth = (head - tail + BLOCK_BUFFER_SIZE) & (BLOCK_BUFFER_SIZE - 1) & 0xF;
if (current_depth != last_depth) { if (current_depth != last_depth) {
quantity16(MAX7219_DEBUG_PLANNER_QUEUE, last_depth, current_depth); quantity16(MAX7219_DEBUG_PLANNER_QUEUE, last_depth, current_depth, &row_change_mask);
last_depth = current_depth; last_depth = current_depth;
} }
#endif #endif
#ifdef MAX7219_DEBUG_PROFILE
static uint8_t last_time_fraction = 0;
const uint8_t current_time_fraction = (uint16_t(CodeProfiler::get_time_fraction()) * MAX7219_NUMBER_UNITS + 8) / 16;
if (current_time_fraction != last_time_fraction) {
quantity(MAX7219_DEBUG_PROFILE, last_time_fraction, current_time_fraction, &row_change_mask);
last_time_fraction = current_time_fraction;
}
#endif
// batch line updates
suspended--;
if (!suspended)
LOOP_L_N(i, 8) if (row_change_mask & _BV(i))
refresh_line(i);
// After resume() automatically do a refresh() // After resume() automatically do a refresh()
if (suspended == 0x80) { if (suspended == 0x80) {
suspended = 0; suspended = 0;

78
Marlin/src/feature/max7219.h
View File

@ -73,6 +73,67 @@
#define max7219_reg_shutdown 0x0C #define max7219_reg_shutdown 0x0C
#define max7219_reg_displayTest 0x0F #define max7219_reg_displayTest 0x0F
#ifdef MAX7219_DEBUG_PROFILE
// This class sums up the amount of time for which its instances exist.
// By default there is one instantiated for the duration of the idle()
// function. But an instance can be created in any code block to measure
// the time spent from the point of instantiation until the CPU leaves
// block. Be careful about having multiple instances of CodeProfiler as
// it does not guard against double counting. In general mixing ISR and
// non-ISR use will require critical sections but note that mode setting
// is atomic so the total or average times can safely be read if you set
// mode to FREEZE first.
class CodeProfiler {
public:
enum Mode : uint8_t { ACCUMULATE_AVERAGE, ACCUMULATE_TOTAL, FREEZE };
private:
static Mode mode;
static uint8_t instance_count;
static uint32_t last_calc_time;
static uint32_t total_time;
static uint8_t time_fraction;
static uint16_t call_count;
uint32_t start_time;
public:
CodeProfiler() : start_time(micros()) { instance_count++; }
~CodeProfiler() {
instance_count--;
if (mode == FREEZE) return;
call_count++;
const uint32_t now = micros();
total_time += now - start_time;
if (mode == ACCUMULATE_TOTAL) return;
// update time_fraction every hundred milliseconds
if (instance_count == 0 && ELAPSED(now, last_calc_time + 100000)) {
time_fraction = total_time * 128 / (now - last_calc_time);
last_calc_time = now;
total_time = 0;
}
}
static void set_mode(Mode _mode) { mode = _mode; }
static void reset() {
time_fraction = 0;
last_calc_time = micros();
total_time = 0;
call_count = 0;
}
// returns fraction of total time which was measured, scaled from 0 to 128
static uint8_t get_time_fraction() { return time_fraction; }
// returns total time in microseconds
static uint32_t get_total_time() { return total_time; }
static uint16_t get_call_count() { return call_count; }
};
#endif
class Max7219 { class Max7219 {
public: public:
static uint8_t led_line[MAX7219_LINES]; static uint8_t led_line[MAX7219_LINES];
@ -110,10 +171,10 @@ public:
#endif #endif
// Set a single LED by XY coordinate // Set a single LED by XY coordinate
static void led_set(const uint8_t x, const uint8_t y, const bool on); static void led_set(const uint8_t x, const uint8_t y, const bool on, uint8_t * const rcm=nullptr);
static void led_on(const uint8_t x, const uint8_t y); static void led_on(const uint8_t x, const uint8_t y, uint8_t * const rcm=nullptr);
static void led_off(const uint8_t x, const uint8_t y); static void led_off(const uint8_t x, const uint8_t y, uint8_t * const rcm=nullptr);
static void led_toggle(const uint8_t x, const uint8_t y); static void led_toggle(const uint8_t x, const uint8_t y, uint8_t * const rcm=nullptr);
// Set all LEDs in a single column // Set all LEDs in a single column
static void set_column(const uint8_t col, const uint32_t val); static void set_column(const uint8_t col, const uint32_t val);
@ -147,11 +208,12 @@ private:
static void set(const uint8_t line, const uint8_t bits); static void set(const uint8_t line, const uint8_t bits);
static void send_row(const uint8_t row); static void send_row(const uint8_t row);
static void send_column(const uint8_t col); static void send_column(const uint8_t col);
static void mark16(const uint8_t y, const uint8_t v1, const uint8_t v2); static void mark16(const uint8_t y, const uint8_t v1, const uint8_t v2, uint8_t * const rcm=nullptr);
static void range16(const uint8_t y, const uint8_t ot, const uint8_t nt, const uint8_t oh, const uint8_t nh); static void range16(const uint8_t y, const uint8_t ot, const uint8_t nt, const uint8_t oh, const uint8_t nh, uint8_t * const rcm=nullptr);
static void quantity16(const uint8_t y, const uint8_t ov, const uint8_t nv); static void quantity(const uint8_t y, const uint8_t ov, const uint8_t nv, uint8_t * const rcm=nullptr);
static void quantity16(const uint8_t y, const uint8_t ov, const uint8_t nv, uint8_t * const rcm=nullptr);
#ifdef MAX7219_INIT_TEST #if MAX7219_INIT_TEST
static void test_pattern(); static void test_pattern();
static void run_test_pattern(); static void run_test_pattern();
static void start_test_pattern(); static void start_test_pattern();

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