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Code Issues Releases Wiki Activity

Resolve corruption of Max7219 Debug LED Matrix

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Roxy-3D 2018-04-08 18:10:57 -05:00 committed by Scott Lahteine
parent 72c15a5cc9
commit 26cc12eaa4
1 changed files with 21 additions and 9 deletions
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30
Marlin/src/feature/Max7219_Debug_LEDs.cpp
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@ -64,9 +64,9 @@
static uint8_t LEDs[8] = { 0 }; static uint8_t LEDs[8] = { 0 };
#ifdef CPU_32_BIT #ifdef CPU_32_BIT
#define MS_DELAY() delayMicroseconds(5) // 32-bit processors need a delay to stabilize the signal #define MS_DELAY() delayMicroseconds(7) // 32-bit processors need a delay to stabilize the signal
#else #else
#define MS_DELAY() NOOP #define MS_DELAY() DELAY_3_NOP
#endif #endif
void Max7219_PutByte(uint8_t data) { void Max7219_PutByte(uint8_t data) {
@ -214,6 +214,16 @@ void Max7219_Set_Column(const uint8_t col, const uint8_t val) {
Max7219(8 - col, LEDs[col]); Max7219(8 - col, LEDs[col]);
} }
void Max7219_register_setup() {
//initiation of the max 7219
Max7219(max7219_reg_scanLimit, 0x07);
Max7219(max7219_reg_decodeMode, 0x00); // using an led matrix (not digits)
Max7219(max7219_reg_shutdown, 0x01); // not in shutdown mode
Max7219(max7219_reg_displayTest, 0x00); // no display test
Max7219(max7219_reg_intensity, 0x01 & 0x0F); // the first 0x0F is the value you can set
// range: 0x00 to 0x0F
}
void Max7219_init() { void Max7219_init() {
uint8_t i, x, y; uint8_t i, x, y;
@ -223,13 +233,8 @@ void Max7219_init() {
OUT_WRITE(MAX7219_LOAD_PIN, HIGH); OUT_WRITE(MAX7219_LOAD_PIN, HIGH);
delay(1); delay(1);
//initiation of the max 7219 Max7219_register_setup();
Max7219(max7219_reg_scanLimit, 0x07);
Max7219(max7219_reg_decodeMode, 0x00); // using an led matrix (not digits)
Max7219(max7219_reg_shutdown, 0x01); // not in shutdown mode
Max7219(max7219_reg_displayTest, 0x00); // no display test
Max7219(max7219_reg_intensity, 0x01 & 0x0F); // the first 0x0F is the value you can set
// range: 0x00 to 0x0F
for (i = 0; i <= 7; i++) { // empty registers, turn all LEDs off for (i = 0; i <= 7; i++) { // empty registers, turn all LEDs off
LEDs[i] = 0x00; LEDs[i] = 0x00;
Max7219(i + 1, 0); Max7219(i + 1, 0);
@ -283,6 +288,13 @@ void Max7219_idle_tasks() {
CRITICAL_SECTION_END CRITICAL_SECTION_END
#endif #endif
static uint16_t refresh_cnt = 0; // The Max7219 circuit boards available for several dollars on eBay
if (refresh_cnt++ > 50000) { // are vulnerable to electrical noise, especially with long wires
Max7219_register_setup(); // next to high current wires. If the display becomes corrupted due
Max7219_LED_Toggle(7, 0); // to electrical noise, this will fix it within a couple of seconds.
refresh_cnt = 0;
}
#if ENABLED(MAX7219_DEBUG_PRINTER_ALIVE) #if ENABLED(MAX7219_DEBUG_PRINTER_ALIVE)
static millis_t next_blink = 0; static millis_t next_blink = 0;
if (ELAPSED(millis(), next_blink)) { if (ELAPSED(millis(), next_blink)) {