37 lines
1.3 KiB
C
37 lines
1.3 KiB
C
/* Fourth step into using program memory */
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/* Passing data array 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 uint16_t myData[] PROGMEM =
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{ 1111, 2222, 3333, 4444, 5555, 6666, 7777, 8888, 9999, 10000 };
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const uint16_t myData2[] PROGMEM = { 123, 456, 789, 012, 345, 678, 999 };
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void printData_Progmem(const uint16_t * dataPointer, uint8_t length) {
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while (length) {
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printWord((uint16_t) dataPointer); /* print out address */
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printString(": ");
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printWord(pgm_read_word(dataPointer)); /* print out data */
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printString("\r\n");
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dataPointer++; /* move to next byte */
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length--; /* one less byte to go */
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_delay_ms(100);
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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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printData_Progmem(myData, sizeof(myData) / 2);
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printString("\r\n");
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_delay_ms(1000);
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printData_Progmem(myData2, sizeof(myData2) / sizeof(myData2[0]));
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printString("\r\n");
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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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