Arduino Pgm_Read_Word. System august 25, 2014, 1:08am #3 awesome, thanks! I want to change »string_table_xx« in »pgm_read_word (string_table_xx)« dynamically.
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Web the pgm_read_byte () is a macro that read a word of data stored in a specified address (progmem area). I want to change »string_table_xx« in »pgm_read_word (string_table_xx)« dynamically. Web pointers on teensy are 32bits, so you can't cast a pgm_read_word () (which returns 16bits) to a pointer sure you can. Web the arduino docs on progmem sometimes use pgm_read_word and sometimes use pgm_read_word_near? Increpare (stephen lavelle) december 2, 2016, 11:53am #2 waait i didn’t read closely enough: Web that makes me think there is something wrong with the way i am using pgm_read_word(). It says menu_str should be declared as. X = pgm_read_byte (framepos++) i read this as: And you have to use the address with ' & ', like this: 1 #define pgm_read_word (address_short) pgm_read_word_near (address_short) the input is address_short and.
K++) { displayint = pgm_read_word_near (charset + k); (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. Web pointers on teensy are 32bits, so you can't cast a pgm_read_word () (which returns 16bits) to a pointer sure you can. So that should just be: Program space utilities // const unsigned long long_table [] progmem = {1ul, 20ul, 300ul, 5000ul, 60000ul, 700000ul}; The value is an address. Web void mainmenu() { unsigned int i = 0; 3 you are correct in using snprintf_p to allow the format string to be read from progmem. Pgm_read_byte_near(address_short) pgm_read_word_near(address_short) pgm_read_dword_near(address_short) pgm_read_float_near(address_short) pgm_read_ptr_near(address_short) 另一种是采. // create array with items for menu for (i = 0; Web int *x = (int*)pgm_read_word(&pointer);
