124 lines
5.3 KiB
Plaintext
124 lines
5.3 KiB
Plaintext
C251 COMPILER V5.60.0, main 01/04/26 14:04:27 PAGE 1
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C251 COMPILER V5.60.0, COMPILATION OF MODULE main
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OBJECT MODULE PLACED IN .\Objects\main.obj
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COMPILER INVOKED BY: C:\Keil_v5\C251\BIN\C251.EXE main.c INTR2 BROWSE DEBUG PRINT(.\Listings\main.lst) TABS(2) OBJECT(.\
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-Objects\main.obj)
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stmt level source
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1 #include "stc32g.h"
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2 #include "intrins.h"
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3
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4 #define MAIN_Fosc 24000000L // 主时钟24MHz
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5 typedef unsigned char u8;
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6 typedef unsigned int u16;
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7 typedef unsigned long u32;
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8
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9 /**************************** 固定参数 400Hz PWM ****************************/
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10 //#define PWM_FREQ 400 // 目标频率
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11 //#define PERIOD 59999 // 24MHz下 400Hz 对应周期值
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12 //#define DUTY 18000 // 30%占空比 (PERIOD/2)
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13
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14 /**************************** 正确参数：50Hz / 30%占空比 ****************************/
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15 #define PWM_FREQ 50
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16 #define PSC_VAL 239 // 预分频值（核心修复：解决16位溢出）
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17 #define PERIOD 1999 // 周期值（16位寄存器最大值65535，合规）
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18 #define DUTY 600 // 30%占空比 (1999*0.3=600)
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19
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20 /**************************** 官方宏定义 保留 ****************************/
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21 #define PWM1_0 0x00 //P:P1.0 N:P1.1
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22 #define PWM1_1 0x01 //P:P2.0 N:P2.1
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23 #define PWM1_2 0x02 //P:P6.0 N:P6.1 ? 最终输出引脚
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24 #define ENO1P 0x01
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25
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26 /*****************************************************************************/
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27 void UpdatePwm(void);
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28
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29 /******************** 主函数 **************************/
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30 void main(void)
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31 {
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32 1 WTST = 0;
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33 1 EAXFR = 1; // 扩展寄存器访问使能
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34 1 CKCON = 0;
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35 1
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36 1 // IO口初始化
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37 1 P0M1 = 0x00; P0M0 = 0x00;
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38 1 P1M1 = 0x00; P1M0 = 0x00;
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39 1 P2M1 = 0x00; P2M0 = 0x00;
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40 1 P3M1 = 0x00; P3M0 = 0x00;
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41 1 P4M1 = 0x00; P4M0 = 0x00;
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42 1 P5M1 = 0x00; P5M0 = 0x00;
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43 1 P6M1 = 0x00; P6M0 = 0x00;
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44 1 P7M1 = 0x00; P7M0 = 0x00;
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45 1
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46 1 // ===================== PWM 硬件配置 =====================
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47 1 PWMA_ENO = 0x00;
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48 1 PWMA_ENO |= ENO1P; // 使能PWM1通道输出
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49 1
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50 1 PWMA_CCER1 = 0x00;
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51 1 PWMA_CCMR1 = 0x68; // PWM模式1输出
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52 1 PWMA_CCER1 = 0x01; // 高电平有效（正常输出）
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53 1
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54 1 PWMA_PS = 0x00;
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55 1 PWMA_PS |= PWM1_2; // ? 选择通道：P6.0 输出
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56 1
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57 1 // ========== 核心修复：配置预分频器（之前缺失！） ==========
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58 1 PWMA_PSCRH = (u8)(PSC_VAL >> 8);
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C251 COMPILER V5.60.0, main 01/04/26 14:04:27 PAGE 2
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59 1 PWMA_PSCRL = (u8)PSC_VAL;
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60 1
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61 1 UpdatePwm(); // 加载400Hz/50%占空比参数
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62 1
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63 1 PWMA_BKR = 0x80; // 使能主输出（必备）
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64 1 PWMA_CR1 = 0x81; // 关键：关闭单脉冲模式 → 连续输出PWM
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65 1
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66 1 EA = 1; // 开总中断（保留框架）
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67 1
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68 1 while (1)
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69 1 {
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70 2 // 无需任何操作，硬件连续输出400Hz PWM
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71 2 }
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72 1 }
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73
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74 //========================================================================
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75 // 函数: UpdatePwm(void)
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76 // 功能: 固定配置 400Hz + 50%占空比
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77 //========================================================================
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78 void UpdatePwm(void)
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79 {
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80 1 // 固定周期：59999 → 400Hz
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81 1 PWMA_ARRH = (u8)(PERIOD >> 8);
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82 1 PWMA_ARRL = (u8)PERIOD;
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83 1
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84 1 // 固定占空比：29999 → 50%
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85 1 PWMA_CCR1H = (u8)(DUTY >> 8);
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86 1 PWMA_CCR1L = (u8)DUTY;
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87 1 }
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Module Information Static Overlayable
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------------------------------------------------
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code size = 225 ------
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ecode size = ------ ------
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data size = ------ ------
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idata size = ------ ------
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pdata size = ------ ------
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xdata size = ------ ------
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xdata-const size = ------ ------
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edata size = ------ ------
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bit size = ------ ------
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ebit size = ------ ------
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bitaddressable size = ------ ------
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ebitaddressable size = ------ ------
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far data size = ------ ------
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huge data size = ------ ------
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const size = 2 ------
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hconst size = ------ ------
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End of Module Information.
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C251 COMPILATION COMPLETE. 0 WARNING(S), 0 ERROR(S)
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