projects:430eforth:start
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| projects:430eforth:start [2020-06-10 18:22] – [An important difference between the Arduino IDE and Forth] mka | projects:430eforth:start [2025-08-16 19:47] (aktuell) – ↷ Links angepasst, weil Seiten im Wiki verschoben wurden mka | ||
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| + | Und hier ist Ting's Quelle: {{ : | ||
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| OK, the execution of commands online without additional hardware has already been shown elsewhere in this Wiki, in the **A Start With Forth** documentation,  | OK, the execution of commands online without additional hardware has already been shown elsewhere in this Wiki, in the **A Start With Forth** documentation,  | ||
| - | in [[projects: | + | in [[papierkorb: | 
| [[en: | [[en: | ||
| Zeile 122: | Zeile 124: | ||
| ===== Some small Examples ===== | ===== Some small Examples ===== | ||
| - | The terminal display shows | + | The terminal display shows: | 
| + |   0  0  0  0  ok>  | ||
| + | These four zeros show the top 4 values of the Data stack.\\ | ||
| - | 0 0 0 0 ok> These four zeros show the top 4 values of the Data stack. | + | With((< | 
| - | with | + | 1 <CR> | 
| - | 1 (CR) | + | 2 <CR> | 
| - | 2 (CR) | + | 3 <CR> | 
| - | 3 (CR) | + | 4 <CR> | 
| - | 4 CR) | + | it changes to: | 
| - | it changes to | + | 1 2 3 4 ok> | 
| - | 1  2  3  4   | + | |
| - | now try | + | |
| - | . (CR) | + | |
| - | . (CR) | + | |
| - | . (CR) | + | |
| - | . (CR) | + | |
| - | and the 4 values are displayed and disappear from the stack and back to 0  0  0  0   | + | |
| - | **The usual HELLO WORLD we can achieve like this:** | + | Now try | 
| + |   . < | ||
| + |   . < | ||
| + |   . < | ||
| + |   . < | ||
| + | and the 4 values are displayed and disappear from the stack which is back to: | ||
| + | 0 0 0 0 ok> | ||
| - | Define a new Forth Word | ||
| - | :    | ||
| - | : start a new Word definition | ||
| - | HELLO1 the name of the new Word | ||
| - | ."  | ||
| - | HELLO WORLD the text to be printed | ||
| - | "  | ||
| - | ; end of new Word definition | ||
| - | And try it out: | + | ==== The usual HELLO WORLD we can achieve like this: ==== | 
| - | hello1 (CR)HELLO WORLD | ||
| - | and format the output  | + | Define  | 
| + |   :    | ||
| + | '':'' | ||
| + | '' | ||
| + | '' | ||
| + | And ''"'' | ||
| + | Finaly '';'' | ||
| - | :  HELLO2  | + | And try it out: | 
| - | a few additional CRs will make it better readable | + | |
| - | hello2 (CR) | + | hello1 <CR> HELLO WORLD | 
| - | HELLO WORLD | + | and format the output a bit. A few additional CRs will make it better readable: | 
| + |   :  HELLO2  | ||
| + | |||
| + |   hello2 < | ||
| + | |||
| + | HELLO WORLD | ||
| + | |||
| + | ==== And now let us control one Bit in the IO. Here the on-board LED ==== | ||
| - | **And now let us control one Bit in the IO. Here the on-board LED** | + |    | 
| - | + |   \ Will set bit 5 of the port to OUTPUT in the Data Direction Register  | |
| - | + | \ 20 is the data bit to be stored, and 24 is the DDR Register address in hex | |
| - | 20 24 POKE (CR) | + | |
| - | \ will set bit 5 of the port to OUTPUT in the Data Direction Register  | + | 20 25 POKE (CR) | 
| - | \ 20 is the data bit to be stored, and 24 is the DDR Register address in hex | + | \ Will set Bit 5 in the OUTPUT Register to HIGH - LED is on 0 0 1 0 0 0 0 0 | 
| - | + | \ 20 is the OUTPUT bit to be stored and 25 in hex is the Output Port Register | |
| - | 20 25 POKE (CR) | + | |
| - | \ Will set Bit 5 in the OUTPUT Register to HIGH - LED is on 0 0 1 0 0 0 0 0 | + | 00 25 POKE (CR) | 
| - | \ 20 is the OUTPUT bit to be stored and 25 in hex is the Output Port Register | + | \ Will set Bit 5 in the OUTPUT Register to LOW - LED is off | 
| - | + | \ here 00 is stored in the Output Register | |
| - | 00 25 POKE (CR) | + | |
| - | \ Will set Bit 5 in the OUTPUT Register to LOW - LED is off | + | |
| - | \ here 00 is stored in the Output Register | + | |
| - | + | ||
| - | The data sheet I used is http:// | + | |
| + | I used this [[http:// | ||
| + | |ATmega328P Datasheet]].  | ||
| And for now only page 280 is important, which shows the addresses for the ports,  | And for now only page 280 is important, which shows the addresses for the ports,  | ||
| - | especially here now Port B: \\ | + | especially here now those two Port-B-addresses: | 
| - | 24 HEX is the DDR (DDR = Data Direction Register) to set bits to OUTPUT and | + | *24 HEX is the DDR (DDR = Data Direction Register) to set bits to OUTPUT and | 
| - | 25 HEX for the OUTPUT Register to set bits to 1 or 0 HIGH or LOW. | + | *25 HEX for the OUTPUT Register to set bits to 1 or 0 HIGH or LOW. | 
| **And the relevant file of these examples** | **And the relevant file of these examples** | ||
projects/430eforth/start.1591806178.txt.gz · Zuletzt geändert: 2020-06-10 18:22 von mka