34 lines
1.1 KiB
C
34 lines
1.1 KiB
C
/* Third step into using program memory */
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/* Passing pointers to functions */
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#include <avr/io.h>
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#include <util/delay.h>
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#include <avr/pgmspace.h>
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#include "USART.h"
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const char myVeryLongString1[] PROGMEM = "\r\nHi there, \
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this is an example of a long string.\r\n\
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The kind that you wouldn't want to store in RAM.\r\n";
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const char myVeryLongString2[] PROGMEM = "All work and no play \
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makes Jack something something.\r\n";
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void printString_Progmem(const char *stringP) {
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char oneLetter;
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while ((oneLetter = pgm_read_byte(stringP))) {
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transmitByte(oneLetter);
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stringP++;
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_delay_ms(100); /* only b/c it's cute */
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}
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}
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int main(void) {
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initUSART();
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while (1) {
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printString_Progmem(&myVeryLongString1[0]);
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printString_Progmem(&myVeryLongString1[50]);
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printString_Progmem(myVeryLongString2);
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_delay_ms(1000);
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} /* End event loop */
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return 0; /* This line is never reached */
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}
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