Arduino Pgm_Read_Word. Define constant pointer framepos to framelist array in ram. This solution can also be broken down into two parts:
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To specify that the string argument is in flash memory, you must use %s in the format string, with a capital s: And you have to use the address with ' & ', like this: Web that makes me think there is something wrong with the way i am using pgm_read_word(). Web the progmem keyword is a variable modifier, it tells the compiler to keep this variable in flash memory, instead of loading it into sram. Set x to byte read from memory at address held in pointer. Web the pgm_read_word_near () returns an unsigned integer. 1 #define pgm_read_word (address_short) pgm_read_word_near (address_short) the input is address_short and. Web progmem pgm_read_word usage within loop. So i thought may be i should define menu_str [] in the following way. Define constant pointer framepos to framelist array in ram.
Web int *x = (int*)pgm_read_word(&pointer); Source code the pgm_read_word () is defined in hardware/tools/avr/avr/include/avr/pgmspace.h as below. So that should just be: (unless you want the word from address 85 of ram.) and pointer is already a pointer, so you don't need the & in front of it. Increpare (stephen lavelle) december 2, 2016, 11:53am #2 waait i didn’t read closely enough: Since you know that those 16 bits are a signed integer, you should cast them to a signed integer. However, if the format string contains %s, then the corresponding argument must be in ram, not flash memory. // create array with items for menu for (i = 0; Web int *x = (int*)pgm_read_word(&pointer); Serial.println ( (int16_t) pgm_read_word_near (&array [ i ] ), dec); And you have to use the address with ' & ', like this:
