81 lines
1.4 KiB
C
81 lines
1.4 KiB
C
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// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱԴ<CAB1>ļ<EFBFBD>
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#include "ls1c_clock.h"
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/*
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* <EFBFBD><EFBFBD>ʱָ<EFBFBD><EFBFBD>ʱ<EFBFBD>䣬<EFBFBD><EFBFBD>λms
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* @j <EFBFBD><EFBFBD>ʱʱ<EFBFBD>䣬<EFBFBD><EFBFBD>λms
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*/
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void delay_ms(int j)
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{
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int k_max = clk_get_cpu_rate()/1000/3; // <20><><EFBFBD><EFBFBD>1000<30><30>ʾms<6D><73><EFBFBD><EFBFBD><EFBFBD><EFBFBD>3Ϊ<33><CEAA><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>õľ<C3B5><C4BE><EFBFBD>(<28><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD><CEAA><EFBFBD>ڲ<EFBFBD>ѭ<EFBFBD><D1AD>ִ<EFBFBD><D6B4>һ<EFBFBD><D2BB><EFBFBD><EFBFBD>Ҫ<EFBFBD><D2AA>ʱ<EFBFBD>Ӹ<EFBFBD><D3B8><EFBFBD>)
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int k = k_max;
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for ( ; j > 0; j--)
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{
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for (k = k_max; k > 0; k--)
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{
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__asm__ ("nop"); // ע<>⣬<EFBFBD><E2A3AC><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>࣬<EFBFBD><E0A3AC><EFBFBD><EFBFBD><EFBFBD>ᱻ<EFBFBD>Ż<EFBFBD><C5BB><EFBFBD>
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}
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}
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return ;
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}
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/*
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* <EFBFBD><EFBFBD>ʱָ<EFBFBD><EFBFBD>ʱ<EFBFBD>䣬<EFBFBD><EFBFBD>λus
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* @n <EFBFBD><EFBFBD>ʱʱ<EFBFBD>䣬<EFBFBD><EFBFBD>λus
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*/
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void delay_us(int n)
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{
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int count_1us = clk_get_cpu_rate() / 1000000 / 3; // <20><>ʱ1us<75><73>ѭ<EFBFBD><D1AD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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int count_max; // <20><>ʱn<6E><CEA2><EFBFBD><EFBFBD>ѭ<EFBFBD><D1AD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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int tmp;
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// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><CAB1><EFBFBD><EFBFBD><EFBFBD><CEA2>(ע<>⣬<EFBFBD><E2A3AC><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֶ<EFBFBD><D6B6>Ż<EFBFBD><C5BB>ģ<EFBFBD>cpuƵ<75>ʸı<CAB8><C4B1>˿<EFBFBD><CBBF><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><D2AA><EFBFBD><EFBFBD><EFBFBD>Ż<EFBFBD><C5BB><EFBFBD><EFBFBD><EFBFBD>ʱcpuƵ<75><C6B5>Ϊ252Mhz)
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if (10 >= n) // <=10us
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{
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count_1us -= 35;
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}
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else if (100 >= n) // <= 100us
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{
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count_1us -= 6;
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}
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else // > 100us
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{
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count_1us -= 1;
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}
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count_max = n * count_1us;
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// <20><>ʱ
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for (tmp = count_max; tmp > 0; tmp--)
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{
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__asm__ ("nop"); // ע<>⣬<EFBFBD><E2A3AC><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>࣬<EFBFBD><E0A3AC><EFBFBD><EFBFBD><EFBFBD>ᱻ<EFBFBD>Ż<EFBFBD><C5BB><EFBFBD>
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}
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return ;
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}
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/*
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* <EFBFBD><EFBFBD>ʱָ<EFBFBD><EFBFBD>ʱ<EFBFBD>䣬<EFBFBD><EFBFBD>λs
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* @i <EFBFBD><EFBFBD>ʱʱ<EFBFBD>䣬<EFBFBD><EFBFBD>λs
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*/
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void delay_s(int i)
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{
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for ( ; i > 0; i--)
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{
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delay_ms(1000);
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}
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return ;
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}
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