C language is a powerful and widely-used programming language that combines the features of high-level languages with those of assembly language. It is commonly used for system design, enabling the development of operating systems and embedded software, as well as for application development where hardware independence is required. Due to its flexibility and efficiency, C has found extensive applications in various fields, from desktop software to microcontroller-based systems.
SCM C Language Programming: TIMER0 and TIMER1 Control Strip LED
**TIMER0 and TIMER1 Control Strip LED Hardware Schematic**
**The TIMER0 and TIMER1 Control Strip LED Programs Are As Follows:**
```c
/* Name: TIMER0 and TIMER1 control strip LED
Description: Timer T0 controls the first set of strip LEDs, with a faster scrolling speed.
Timer T1 controls the second set of strip LEDs with a slower scrolling speed.
*/
#include "reg51.h"
#include
#define uchar unsigned char
#define uint unsigned int
uchar tc0 = 0, tc1 = 0;
void main()
{
P0 = 0xfe;
P2 = 0xfe;
TMOD = 0x11; // Timer 0 and Timer 1 work in mode 1
TH0 = (65536 - 15000) / 256; // Timer 0: 15ms
TL0 = (65536 - 15000) % 256;
TH1 = (65536 - 50000) / 256; // Timer 1: 50ms
TL1 = (65536 - 50000) % 256;
IE = 0x8a; // Enable global and timer interrupts
TR0 = 1; // Start Timer 0
TR1 = 1; // Start Timer 1
while(1); // Infinite loop
}
// Timer 0 Interrupt Service Routine
void Time0() interrupt 1
{
TH0 = (65536 - 15000) / 256; // Reload initial value for Timer 0
TL0 = (65536 - 15000) % 256;
if (++tc0 == 10) // After 150ms
{
tc0 = 0;
P0 = _crol_(P0, 1); // Rotate left the LED pattern on Port 0
}
}
// Timer 1 Interrupt Service Routine
void Time1() interrupt 3
{
TH1 = (65536 - 50000) / 256; // Reload initial value for Timer 1
TL1 = (65536 - 50000) % 256;
if (++tc1 == 10) // After 500ms
{
tc1 = 0;
P2 = _crol_(P2, 1); // Rotate left the LED pattern on Port 2
}
}
```
**Extended Program Design: TIMER0 Control Flow Light for Single-Chip C Language Programming**
This program demonstrates how to use TIMER0 and TIMER1 in an 8051 microcontroller to control two sets of LED strips, creating a flowing light effect. By adjusting the timer values, you can control the speed of the LED movement. TIMER0 is set to a shorter interval (15ms), resulting in a faster scroll, while TIMER1 uses a longer interval (50ms) for a slower effect. The `_crol_` function from the `` library is used to rotate the bits of the port, which simulates the flow of light across the LEDs. This approach is commonly used in embedded systems for visual feedback or status indication.
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