87 lines
2.7 KiB
C
87 lines
2.7 KiB
C
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#include "stc32g.h"
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#include "intrins.h"
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#define MAIN_Fosc 24000000L // <20><>ʱ<EFBFBD><CAB1>24MHz
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typedef unsigned char u8;
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typedef unsigned int u16;
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typedef unsigned long u32;
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/**************************** <20>̶<EFBFBD><CCB6><EFBFBD><EFBFBD><EFBFBD> 400Hz PWM ****************************/
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//#define PWM_FREQ 400 // Ŀ<><C4BF>Ƶ<EFBFBD><C6B5>
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//#define PERIOD 59999 // 24MHz<48><7A> 400Hz <20><>Ӧ<EFBFBD><D3A6><EFBFBD><EFBFBD>ֵ
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//#define DUTY 18000 // 30%ռ<>ձ<EFBFBD> (PERIOD/2)
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/**************************** <20><>ȷ<EFBFBD><C8B7><EFBFBD><EFBFBD><EFBFBD><EFBFBD>50Hz / 30%ռ<>ձ<EFBFBD> ****************************/
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#define PWM_FREQ 50
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#define PSC_VAL 239 // Ԥ<><D4A4>Ƶֵ<C6B5><D6B5><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><DEB8><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>16λ<36><CEBB><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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#define PERIOD 1999 // <20><><EFBFBD><EFBFBD>ֵ<EFBFBD><D6B5>16λ<36>Ĵ<EFBFBD><C4B4><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֵ65535<33><35><EFBFBD>Ϲ棩
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#define DUTY 600 // 30%ռ<>ձ<EFBFBD> (1999*0.3=600)
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/**************************** <20>ٷ<EFBFBD><D9B7>궨<EFBFBD><EAB6A8> <20><><EFBFBD><EFBFBD> ****************************/
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#define PWM1_0 0x00 //P:P1.0 N:P1.1
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#define PWM1_1 0x01 //P:P2.0 N:P2.1
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#define PWM1_2 0x02 //P:P6.0 N:P6.1 ? <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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#define ENO1P 0x01
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/*****************************************************************************/
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void UpdatePwm(void);
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/******************** <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD> **************************/
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void main(void)
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{
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WTST = 0;
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EAXFR = 1; // <20><>չ<EFBFBD>Ĵ<EFBFBD><C4B4><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD><CAB9>
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CKCON = 0;
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// IO<49>ڳ<EFBFBD>ʼ<EFBFBD><CABC>
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P0M1 = 0x00; P0M0 = 0x00;
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P1M1 = 0x00; P1M0 = 0x00;
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P2M1 = 0x00; P2M0 = 0x00;
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P3M1 = 0x00; P3M0 = 0x00;
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P4M1 = 0x00; P4M0 = 0x00;
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P5M1 = 0x00; P5M0 = 0x00;
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P6M1 = 0x00; P6M0 = 0x00;
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P7M1 = 0x00; P7M0 = 0x00;
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// ===================== PWM Ӳ<><D3B2><EFBFBD><EFBFBD><EFBFBD><EFBFBD> =====================
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PWMA_ENO = 0x00;
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PWMA_ENO |= ENO1P; // ʹ<><CAB9>PWM1ͨ<31><CDA8><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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PWMA_CCER1 = 0x00;
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PWMA_CCMR1 = 0x68; // PWMģʽ1<CABD><31><EFBFBD><EFBFBD>
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PWMA_CCER1 = 0x01; // <20>ߵ<EFBFBD>ƽ<EFBFBD><C6BD>Ч<EFBFBD><D0A7><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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PWMA_PS = 0x00;
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PWMA_PS |= PWM1_2; // ? ѡ<><D1A1>ͨ<EFBFBD><CDA8><EFBFBD><EFBFBD>P6.0 <20><><EFBFBD><EFBFBD>
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// ========== <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><DEB8><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ԥ<EFBFBD><D4A4>Ƶ<EFBFBD><C6B5><EFBFBD><EFBFBD>֮ǰȱʧ<C8B1><CAA7><EFBFBD><EFBFBD> ==========
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PWMA_PSCRH = (u8)(PSC_VAL >> 8);
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PWMA_PSCRL = (u8)PSC_VAL;
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UpdatePwm(); // <20><><EFBFBD><EFBFBD>400Hz/50%ռ<>ձȲ<D5B1><C8B2><EFBFBD>
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PWMA_BKR = 0x80; // ʹ<><CAB9><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ر<EFBFBD><D8B1><EFBFBD>
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PWMA_CR1 = 0x81; // <20>ؼ<EFBFBD><D8BC><EFBFBD><EFBFBD>رյ<D8B1><D5B5><EFBFBD><EFBFBD><EFBFBD>ģʽ <20><> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>PWM
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EA = 1; // <20><><EFBFBD><EFBFBD><EFBFBD>жϣ<D0B6><CFA3><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ܣ<EFBFBD>
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while (1)
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{
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// <20><><EFBFBD><EFBFBD><EFBFBD>κβ<CEBA><CEB2><EFBFBD><EFBFBD><EFBFBD>Ӳ<EFBFBD><D3B2><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>400Hz PWM
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}
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}
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//========================================================================
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// <20><><EFBFBD><EFBFBD>: UpdatePwm(void)
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// <20><><EFBFBD><EFBFBD>: <20>̶<EFBFBD><CCB6><EFBFBD><EFBFBD><EFBFBD> 400Hz + 50%ռ<>ձ<EFBFBD>
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//========================================================================
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void UpdatePwm(void)
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{
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// <20>̶<EFBFBD><CCB6><EFBFBD><EFBFBD>ڣ<EFBFBD>59999 <20><> 400Hz
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PWMA_ARRH = (u8)(PERIOD >> 8);
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PWMA_ARRL = (u8)PERIOD;
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// <20>̶<EFBFBD>ռ<EFBFBD>ձȣ<D5B1>29999 <20><> 50%
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PWMA_CCR1H = (u8)(DUTY >> 8);
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PWMA_CCR1L = (u8)DUTY;
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}
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