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BG43131422717/12/2023
This is a very nice part. Had some trouble to find the right library for an Arduino Nano to get it to work. Here is the code:
// Program to exercise the MD_MAX72XX library
// configuration for Nano v3 with 12x 1088AS
//
// Uses most of the functions in the library
#include
// Turn on debug statements to the serial output
#define DEBUG 1
#if DEBUG
#define PRINT(s, x) { Serial.print(F(s)); Serial.print(x); }
#define PRINTS(x) Serial.print(F(x))
#define PRINTD(x) Serial.println(x, DEC)
#else
#define PRINT(s, x)
#define PRINTS(x)
#define PRINTD(x)
#endif
// Define the number of devices we have in the chain and the hardware interface
// NOTE: These pin numbers will probably not work with your hardware and may
// need to be adapted
#define HARDWARE_TYPE MD_MAX72XX::FC16_HW
//#define HARDWARE_TYPE MD_MAX72XX::DR0CR0RR0_HW
//#define HARDWARE_TYPE MD_MAX72XX::DR0CR0RR1_HW
//#define HARDWARE_TYPE MD_MAX72XX::DR0CR1RR0_HW
//#define HARDWARE_TYPE MD_MAX72XX::DR0CR1RR1_HW
//#define HARDWARE_TYPE MD_MAX72XX::DR1CR0RR0_HW
//#define HARDWARE_TYPE MD_MAX72XX::DR1CR0RR1_HW
//#define HARDWARE_TYPE MD_MAX72XX::DR1CR1RR0_HW
//#define HARDWARE_TYPE MD_MAX72XX::DR1CR1RR1_HW
#define ver "FC16_HW"
#define MAX_DEVICES 12
#define CLK_PIN 11 // or SCK
#define DATA_PIN 12 // or MOSI
#define CS_PIN 10 // or SS
// SPI hardware interface
MD_MAX72XX mx = MD_MAX72XX(HARDWARE_TYPE, CS_PIN, MAX_DEVICES);
// Specific SPI hardware interface
//MD_MAX72XX mx = MD_MAX72XX(HARDWARE_TYPE, SPI1, CS_PIN, MAX_DEVICES);
// Arbitrary pins
//MD_MAX72XX mx = MD_MAX72XX(HARDWARE_TYPE, DATA_PIN, CLK_PIN, CS_PIN, MAX_DEVICES);
// We always wait a bit between updates of the display
#define DELAYTIME 100 // in milliseconds
void scrollText(const char *p)
{
uint8_t charWidth;
uint8_t cBuf[8]; // this should be ok for all built-in fonts
PRINTS("nScrolling text");
OOPS: cannot post more than 2000 characters... Anyway, most important stuff is here in the header
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