It might not be exactly same code that is uploaded, because I modified it a bit before I found I can't it upload anymore. But it should be basically same, there was more DigiUSB.refresh() and DigiUSB.delay(x) calls (now most are replaced by get_input()). It is part of converting Arduino's serial debugging to Digispark's USB. I stopped messing with USB when Digispark stared acting weird and returned to old LED-flashing debugging (you can see it in the code). It uses slightly modified Mirf nRF24L01 library (attached), but the Digispark I was testing USB communication was never connected to anyting - I was testing just USB without interfacing it to nRF24L01.
All experiments performed on MacBook Pro (15-inch, Mid 2010, still USB 2.0) with USB extension cable. Programming works mostly reliable (about 80% of attempts succeed on first try).
I left Serial code in (#ifdef'd out) so you can see what I am trying to do.
#include <Mirf.h>
#include <nRF24L01.h>
#include <MirfSoftwareSpiDriver.h>
#define my_MIRF_PIN_SCK 2
#define my_MIRF_PIN_MOSI 5
// 3 and 4 are USB connections
//#define my_MIRF_CE 3
//#define my_MIRF_CSN 4
// NRF24L01 pins are hardwired to HIGH, tell library not to bother with them
#define my_MIRF_CE mirf_PIN_DONT_USE
// XXX same as status LED
#define my_MIRF_CSN 1
#define my_MIRF_PIN_MISO 0
#define my_STATUS_LED 1
//#define my_USE_SERIAL
#define my_USE_DIGIUSB
#define my_USE_LED
#ifdef my_USE_DIGIUSB
#include <DigiUSB.h>
#endif
void ok(boolean no_serial = false) {
#ifdef my_USE_SERIAL
if(!no_serial)
Serial.println("OK");
#endif
#ifdef my_USE_DIGIUSB
DigiUSB.println("OK");
get_input();
#endif
#ifdef my_USE_LED
digitalWrite(my_STATUS_LED, HIGH);
delay(100);
digitalWrite(my_STATUS_LED, LOW);
delay(50);
digitalWrite(my_STATUS_LED, HIGH);
delay(100);
digitalWrite(my_STATUS_LED, LOW);
#if my_STATUS_LED == my_MIRF_CSN
delay(500);
// switch CSN back to high (needed for SPI to work)
digitalWrite(my_MIRF_CSN, HIGH);
#endif
#endif
}
void error() {
#ifdef my_USE_SERIAL
Serial.println("ERROR");
#endif
#ifdef my_USE_DIGIUSB
DigiUSB.println("ERR");
get_input();
#endif
#ifdef my_USE_LED
while(1) {
digitalWrite(my_STATUS_LED, HIGH);
delay(500);
digitalWrite(my_STATUS_LED, LOW);
delay(100);
}
#endif
}
void number(int num) {
#ifdef my_USE_SERIAL
Serial.println("STEP");
Serial.println(num);
#endif
#ifdef my_USE_DIGIUSB
//DigiUSB.print("S ");
DigiUSB.println(num);
get_input();
#endif
#ifdef my_USE_LED
digitalWrite(my_STATUS_LED, HIGH);
delay(500);
digitalWrite(my_STATUS_LED, LOW);
delay(100);
for (int i = 0; i < num; i++) {
digitalWrite(my_STATUS_LED, HIGH);
delay(100);
digitalWrite(my_STATUS_LED, LOW);
delay(50);
}
#if my_STATUS_LED == my_MIRF_CSN
// switch CSN back to high (needed for SPI to work)
digitalWrite(my_MIRF_CSN, HIGH);
#endif
delay(1000);
#endif
}
void get_input() {
#ifdef my_USE_DIGIUSB
// when there are no characters to read
while (1) {
if(DigiUSB.available()){
//something to read
DigiUSB.read();
break;
}
// refresh the usb port
//DigiUSB.refresh();
DigiUSB.delay(10);
}
#endif
}
// the setup routine runs once when you press reset:
void setup() {
#ifdef my_USE_LED
pinMode(my_STATUS_LED, OUTPUT);
digitalWrite(my_STATUS_LED, HIGH);
ok();
#endif
#ifdef my_USE_DIGIUSB
DigiUSB.begin();
get_input();
ok();
#endif
#ifdef my_USE_SERIAL
Serial.begin(9600);
Serial.println("Starting wireless...");
#endif
Mirf.spi = &MirfSoftwareSpiDriver(my_MIRF_PIN_SCK, my_MIRF_PIN_MOSI, my_MIRF_PIN_MISO);
Mirf.init(my_MIRF_CE, my_MIRF_CSN);
Mirf.setRADDR((byte *)"clie1");
Mirf.payload = sizeof(unsigned long);
Mirf.config();
number(1);
// Read and print RF_SETUP
byte rf_setup = 0;
Mirf.readRegister( RF_SETUP, &rf_setup, sizeof(rf_setup) );
#ifdef my_USE_SERIAL
Serial.print( "rf_setup = " );
Serial.println( rf_setup, BIN );
#endif
#ifdef my_USE_DIGIUSB
DigiUSB.println( "rf_setup=" );
DigiUSB.println(rf_setup);
DigiUSB.delay(100);
#endif
if (rf_setup != 15)
error();
else
ok();
}
// the loop routine runs over and over again forever:
void loop() {
}
By the way, is there any documentation for Digispark libraries? Not everything is easy to guess from source code, and USB is rather tricky.
