Editing Embedded Programming Tips and Tricks for Beginners
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Latest revision | Your text | ||
Line 71: | Line 71: | ||
<pre> | <pre> | ||
− | #define | + | #define off 0 |
− | #define | + | #define on 1 |
− | volatile uint16_t clk1000ms= | + | volatile uint16_t clk1000ms=on; // initializing them to on(1) insures there is an initial delay cycle when |
− | volatile uint16_t clk100ms= | + | volatile uint16_t clk100ms=on; // the code first starts, otherwise they would all happen at |
− | volatile uint8_t clk10ms= | + | volatile uint8_t clk10ms=on; // once during first run. |
ISR (TIMER0_OVF_vect) | ISR (TIMER0_OVF_vect) | ||
{ | { | ||
− | if (clk1000ms != | + | if (clk1000ms != off) |
{ | { | ||
clk1000ms++; | clk1000ms++; | ||
− | if (clk1000ms >= 10001) clk1000ms= | + | if (clk1000ms >= 10001) clk1000ms=off; |
} | } | ||
− | if (clk100ms != | + | if (clk100ms != off) |
{ | { | ||
clk100ms++; | clk100ms++; | ||
− | if (clk100ms >= 1001) clk100ms= | + | if (clk100ms >= 1001) clk100ms=off; |
} | } | ||
− | if (clk10ms != | + | if (clk10ms != off) |
{ | { | ||
clk10ms++; | clk10ms++; | ||
− | if (clk10ms >= 101) clk10ms= | + | if (clk10ms >= 101) clk10ms=off; |
} | } | ||
// Timer clock is 1mhz, timer is 8bit. | // Timer clock is 1mhz, timer is 8bit. | ||
Line 104: | Line 104: | ||
{ | { | ||
− | if (clk1000ms== | + | if (clk1000ms==off) |
{ | { | ||
// put code here to run every second | // put code here to run every second | ||
− | clk1000ms = | + | clk1000ms = on; |
} | } | ||
− | if (clk100ms== | + | if (clk100ms==off) |
{ | { | ||
// put code here to run 10 times a second | // put code here to run 10 times a second | ||
− | clk100ms = | + | clk100ms = on; |
} | } | ||
− | if (clk10ms== | + | if (clk10ms==off) |
{ | { | ||
// put code here to run 100 times a second | // put code here to run 100 times a second | ||
− | clk10ms = | + | clk10ms = on; |
} | } | ||