| ??? 08/24/06 19:38 Read: times |
#122941 - C first Responding to: ???'s previous message |
Jon,
You need to learn C first. The preprocessor will turn this #define SW1 = P2_4 SW1=1; into this = P2_4=1; Which is not correct C code. Then, what's right in Keil does not need to be right in SDCC. SDCC is not Keil compatible for non-ANSI extensions. So sbit SW1 = 0xA4; tells SDCC there is some special function bit variable and it is initialized to 1 (0xA4 != 0). Your first define was closest to the right solution: #define SW1 P2_4 Maarten |
| Topic | Author | Date |
| SDCC Nooby Question | 01/01/70 00:00 | |
| Ok got it | 01/01/70 00:00 | |
| it\'s ok in Keil | 01/01/70 00:00 | |
| Yes... | 01/01/70 00:00 | |
| The reason is... | 01/01/70 00:00 | |
| C first | 01/01/70 00:00 | |
| Learning C | 01/01/70 00:00 | |
| if this is cut and paste then | 01/01/70 00:00 | |
| Semi-colon was it | 01/01/70 00:00 | |
| C is fidgety about error declaration | 01/01/70 00:00 | |
| Syntax error | 01/01/70 00:00 | |
| Going back and looking... | 01/01/70 00:00 | |
| It means | 01/01/70 00:00 | |
| Preprocessor output | 01/01/70 00:00 | |
| explanation | 01/01/70 00:00 | |
| Semicolon | 01/01/70 00:00 | |
| yes, Andy you are absolutely correct | 01/01/70 00:00 | |
| Semicolon - example | 01/01/70 00:00 | |
| backwards | 01/01/70 00:00 | |
| HUH? | 01/01/70 00:00 | |
| try this | 01/01/70 00:00 | |
| Dallas app notes | 01/01/70 00:00 | |
| False economy | 01/01/70 00:00 | |
| OK | 01/01/70 00:00 | |
| Learning from the tools | 01/01/70 00:00 | |
| #define and the preprocessor | 01/01/70 00:00 | |
| are you sure? | 01/01/70 00:00 | |
Yes! | 01/01/70 00:00 | |
| Hmmm... | 01/01/70 00:00 | |
| SDCC Manual | 01/01/70 00:00 | |
| Err... ya think? | 01/01/70 00:00 | |
| Looks clear enough to me | 01/01/70 00:00 |