| ??? 11/17/08 07:48 Read: times |
#160074 - That's not what the manual says Responding to: ???'s previous message |
Mahesh Joshi said:
I use SDCC ver 2.4.0; This is an example how to declare sfr regs & bits.
//declaring sfr registor address sfr at 0x80 P0 ;(write your comments here) sfr at 0x81 SP ; //declaring sfr bit address sbit at 0x88 IT0 ; sbit at 0x89 IE0 ; SDCC Manual said:
3.4.1.7 sfr / sfr16 / sfr32 / sbit
Like the bit keyword, sfr / sfr16 / sfr32 / sbit signify both a data-type and storage class, they are used to describe the special function registers and special bit variables of a 8051, eg: __sfr __at (0x80) P0; /* special function register P0 at location 0x80 */ /* 16 bit special function register combination for timer 0 with the high byte at location 0x8C and the low byte at location 0x8A */ __sfr16 __at (0x8C8A) TMR0; __sbit __at (0xd7) CY; /* CY (Carry Flag) */ http://sdcc.sourceforge.net/doc/sdccm...0000000000 So, has the syntax changed between versions? Or are you using a "variant" syntax? Or what? |
| Topic | Author | Date |
| SDCC declaring SFR bits | 01/01/70 00:00 | |
| Manual | 01/01/70 00:00 | |
| SDCC declaring SFR bits | 01/01/70 00:00 | |
| Header files? | 01/01/70 00:00 | |
| Header files? | 01/01/70 00:00 | |
| The manual is not enough! | 01/01/70 00:00 | |
| This is one way | 01/01/70 00:00 | |
| That's not what the manual says | 01/01/70 00:00 | |
| Those SFR definitions are working | 01/01/70 00:00 | |
| Need someone who knows SDCC: Maarten Brock? | 01/01/70 00:00 | |
| variant syntax of SDCC keywords and ANSI-C compatibility | 01/01/70 00:00 | |
| C standard compliance | 01/01/70 00:00 | |
| Common for all compilers | 01/01/70 00:00 | |
| coders should think twice | 01/01/70 00:00 | |
| The preprocessor is often a good friend | 01/01/70 00:00 | |
| Suggestion | 01/01/70 00:00 | |
thanks, but... | 01/01/70 00:00 |