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| 07:43.16 | Quinto | hi, i'm studing a development kit with Silab8051 because i want learn to programm MCU |
| 07:43.18 | Quinto | and I bought this card C8051F410-DK. I just do not understand some things a sample file that I am studying... |
| 07:43.18 | Quinto | <PROTECTED> |
| 07:43.18 | Quinto | In this project i have 3 file: main and 2 haderfile. In the first header file: c8051410F.h i have Register/bit definitions for the C8051F41x product family. But for example what is sfr P0= 0x80; // Port 0 latch |
| 07:43.18 | Quinto | what is sfr, P0 and why 0x80? i have datasheet but i dont undstand well |
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| 08:21.46 | Quinto | what is SFR? |
| 08:50.07 | keesj | special function register e.g. memory mapped io |
| 08:52.09 | Quinto | but in header file |
| 08:52.19 | Quinto | i view SCR P0 = 0x89 |
| 08:52.27 | Quinto | and after SCR A0 = 0x90 |
| 08:52.30 | Quinto | but i view also |
| 08:52.45 | Quinto | sbit RTIO=0x89 |
| 08:52.54 | Quinto | RTIO is a bit of P0 register |
| 08:52.55 | Quinto | :S |
| 08:53.00 | Quinto | i dont undstand this |
| 08:55.38 | keesj | from the googling I done it looks like the SFR can be paged |
| 08:56.18 | keesj | so depending on the SFRPAGE value the different registers will be mapped on the same address |
| 08:57.30 | keesj | this is from looking at this http://www.datasheetarchive.com/F-12X-datasheet.html# |
| 08:59.19 | Quinto | i have already |
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| 09:12.15 | Quinto | keesj: keesj: |
| 09:12.19 | Quinto | keesj: http://pastebin.com/ahmMqMHp |
| 09:12.21 | Quinto | loo |
| 09:12.23 | Quinto | look here |
| 09:12.26 | Quinto | same address? |
| 09:21.31 | keesj | you need to check the datasheetthe sbit looks like values and not addresses e.g. you need to put 0x88 in the TCON regsiter before you configure Ext. Interrupt 0 type |
| 09:24.15 | keesj | TCON (Timer Control, Addresses 88h, Bit-Addressable): The Timer Control SFR is used to configure and modify the way in which the 8051's two timers operate. This SFR controls whether each of the two timers is running or stopped and contains a flag to indicate that each timer has overflowed. Additionally, some non-timer related bits are located in the TCON SFR. These bits are used to configure the way in which the external interrupts are activated and also co |
| 09:24.37 | keesj | http://www.8052.com/tutsfr.htm probably something similar. |
| 09:25.14 | keesj | that's all the googling I will to today. |
| 09:25.17 | keesj | have fun! |
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