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May 24th, 2018
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  1. #include <SPI.h>
  2.  
  3. void setup() {
  4. Serial.begin(115200); //set baud rate to 115200 for usart
  5. digitalWrite(SS, HIGH); // disable Slave Select
  6. SPI.begin();
  7. SPI.setClockDivider(SPI_CLOCK_DIV8);//divide the clock by 8
  8. }
  9.  
  10. void loop() {
  11. char c;
  12. digitalWrite(SS, LOW); // enable Slave Select
  13. // send test string
  14. for (const char * p = "Hello, world!\r" ; c = *p; p++) {
  15. SPI.transfer (c);
  16. Serial.print(c);
  17. }
  18. digitalWrite(SS, HIGH); // disable Slave Select
  19. delay(2000);
  20. }
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