explanation.txt

来自「ulink keil schematic diagram」· 文本 代码 · 共 27 行

This code document is the S3C44B0X board test order, including assembly initialization document and C language test code. 
The assembly code mainly completes the system initialization, 
including: Prohibition Looks at the dog; 
Forbids all severances; Initialization memory (including SDRAM); 
Hypothesis phase-lock link frequency multiplication; 
Enables all units module clock; 
Initialization storehouse; 
Establishment severance and so on The C language code mainly is the application code, 
including: Establishment use instruction buffer; 
The revision system master clock is 32MHz; 
IO port function, direction hypothesis; 
Initialization severance; 
Initialization DMF50081 liquid crystal module; 
Buzzer test; 
Liquid crystal display test; 
LED output test; 
Timer, PWM test and so on; 
On after board electricity, four LED will be able entire to be bright, the buzzer will be able to sound, 
two second latter four LED will be able to appear 5 time back and forth glitters. 
Several second latter four LED appears the PWM output, 
each LED output occupies empties is more different than with the frequency. 
If the LCD connection meets DMF50081 (the attention: This procedure only liquid crystal module tests in Qinghua loose far company's DMF50081ZNB - in the FW, 
according to tests indicated, 
the different company leaves DMF50081 needs to revise the initialization parameter to be able to obtain the similar output), 
after on electricity, the liquid crystal module can appear the thick vertical stripe.
 Any time any presses down four pressed keys in, 
the buzzer will be able continuously to sound until your pine to operate the pressed key.