想让电机转起来，最粗暴的方式就是直接在主循环中进行六步换相，当然每一步之间最好有个延时，不然也转不起来。
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    1. #include "gd32a50x.h"
    2. #include "systick.h"
    3. #include "gd32a503r_start.h"
    4. #include <stdio.h>
    5. #include "main.h"
    6. #include "OLED.h"
    7. #include "PWM.h"
    10. __IO uint32_t step = 1;
    13. int main(void)
    14. {    
    15.     gd_eval_com_init(EVAL_COM);
    16.     OLED_Init();
    18.     PWM_Init();    
    20.     while (1)
    21.     {
    23.         /*  channel0 configuration */
    24.         timer_channel_output_mode_config(TIMER0, TIMER_CH_0, TIMER_OC_MODE_PWM0);
    25.         timer_channel_output_state_config(TIMER0, TIMER_CH_0, TIMER_CCX_ENABLE);
    26.         timer_channel_complementary_output_state_config(TIMER0, TIMER_CH_0, TIMER_CCXN_DISABLE);
    28.         /*  channel1 configuration */
    29.         timer_channel_output_state_config(TIMER0, TIMER_CH_1, TIMER_CCX_DISABLE);
    30.         timer_channel_complementary_output_state_config(TIMER0, TIMER_CH_1, TIMER_CCXN_DISABLE);
    32.         /*  channel2 configuration */
    33.         timer_channel_output_mode_config(TIMER0, TIMER_CH_2, TIMER_OC_MODE_PWM0);
    34.         timer_channel_output_state_config(TIMER0, TIMER_CH_2, TIMER_CCX_DISABLE);
    35.         timer_channel_complementary_output_state_config(TIMER0, TIMER_CH_2, TIMER_CCXN_ENABLE);
    37.         Delay_ms(7);
    39.     /* next step: step 3 configuration .B-C` breakover---------------------------- */
    41.         /*  channel0 configuration */
    42.         timer_channel_output_state_config(TIMER0, TIMER_CH_0, TIMER_CCX_DISABLE);
    43.         timer_channel_complementary_output_state_config(TIMER0, TIMER_CH_0, TIMER_CCXN_DISABLE);
    45.         /*  channel1 configuration */
    46.         timer_channel_output_mode_config(TIMER0, TIMER_CH_1, TIMER_OC_MODE_PWM0);
    47.         timer_channel_output_state_config(TIMER0, TIMER_CH_1, TIMER_CCX_ENABLE);
    48.         timer_channel_complementary_output_state_config(TIMER0, TIMER_CH_1, TIMER_CCXN_DISABLE);
    50.         /*  channel2 configuration */
    51.         timer_channel_output_mode_config(TIMER0, TIMER_CH_2, TIMER_OC_MODE_PWM0);
    52.         timer_channel_output_state_config(TIMER0, TIMER_CH_2, TIMER_CCX_DISABLE);
    53.         timer_channel_complementary_output_state_config(TIMER0, TIMER_CH_2, TIMER_CCXN_ENABLE);
    55.          Delay_ms(7);
    57.     /* next step: step 4 configuration .B-A` breakover---------------------------- */
    59.         /*  channel0 configuration */
    60.         timer_channel_output_mode_config(TIMER0, TIMER_CH_0, TIMER_OC_MODE_PWM0);
    61.         timer_channel_output_state_config(TIMER0, TIMER_CH_0, TIMER_CCX_DISABLE);
    62.         timer_channel_complementary_output_state_config(TIMER0, TIMER_CH_0, TIMER_CCXN_ENABLE);
    64.         /*  channel1 configuration */
    65.         timer_channel_output_mode_config(TIMER0, TIMER_CH_1, TIMER_OC_MODE_PWM0);
    66.         timer_channel_output_state_config(TIMER0, TIMER_CH_1, TIMER_CCX_ENABLE);
    67.         timer_channel_complementary_output_state_config(TIMER0, TIMER_CH_1, TIMER_CCXN_DISABLE);
    69.         /*  channel2 configuration */
    70.         timer_channel_output_state_config(TIMER0, TIMER_CH_2, TIMER_CCX_DISABLE);
    71.         timer_channel_complementary_output_state_config(TIMER0, TIMER_CH_2, TIMER_CCXN_DISABLE);
    73.          Delay_ms(7);
    75.     /* next step: step 5 configuration .C-A` breakover---------------------------- */
    77.         /*  channel0 configuration */
    78.         timer_channel_output_mode_config(TIMER0, TIMER_CH_0, TIMER_OC_MODE_PWM0);
    79.         timer_channel_output_state_config(TIMER0, TIMER_CH_0, TIMER_CCX_DISABLE);
    80.         timer_channel_complementary_output_state_config(TIMER0, TIMER_CH_0, TIMER_CCXN_ENABLE);
    82.         /*  channel1 configuration */
    83.         timer_channel_output_state_config(TIMER0, TIMER_CH_1, TIMER_CCX_DISABLE);
    84.         timer_channel_complementary_output_state_config(TIMER0, TIMER_CH_1, TIMER_CCXN_DISABLE);
    86.         /*  channel2 configuration */
    87.         timer_channel_output_mode_config(TIMER0, TIMER_CH_2, TIMER_OC_MODE_PWM0);
    88.         timer_channel_output_state_config(TIMER0, TIMER_CH_2, TIMER_CCX_ENABLE);
    89.         timer_channel_complementary_output_state_config(TIMER0, TIMER_CH_2, TIMER_CCXN_DISABLE);
    91.          Delay_ms(7);
    93.     /* next step: step 6 configuration .C-B` breakover---------------------------- */
    95.         /*  channel0 configuration */
    96.         timer_channel_output_state_config(TIMER0, TIMER_CH_0, TIMER_CCX_DISABLE);
    97.         timer_channel_complementary_output_state_config(TIMER0, TIMER_CH_0, TIMER_CCXN_DISABLE);
    99.         /*  channel1 configuration */
    100.         timer_channel_output_mode_config(TIMER0, TIMER_CH_1, TIMER_OC_MODE_PWM0);
    101.         timer_channel_output_state_config(TIMER0, TIMER_CH_1, TIMER_CCX_DISABLE);
    102.         timer_channel_complementary_output_state_config(TIMER0, TIMER_CH_1, TIMER_CCXN_ENABLE);
    104.         /*  channel2 configuration */
    105.         timer_channel_output_mode_config(TIMER0, TIMER_CH_2, TIMER_OC_MODE_PWM0);
    106.         timer_channel_output_state_config(TIMER0, TIMER_CH_2, TIMER_CCX_ENABLE);
    107.         timer_channel_complementary_output_state_config(TIMER0, TIMER_CH_2, TIMER_CCXN_DISABLE);
    109.          Delay_ms(7);
    111.     /* next step: step 1 configuration .A-B` breakover---------------------------- */
    113.         /*  channel0 configuration */
    114.         timer_channel_output_mode_config(TIMER0, TIMER_CH_0, TIMER_OC_MODE_PWM0);
    115.         timer_channel_output_state_config(TIMER0, TIMER_CH_0, TIMER_CCX_ENABLE);
    116.         timer_channel_complementary_output_state_config(TIMER0, TIMER_CH_0, TIMER_CCXN_DISABLE);
    118.         /*  channel1 configuration */
    119.         timer_channel_output_mode_config(TIMER0, TIMER_CH_1, TIMER_OC_MODE_PWM0);
    120.         timer_channel_output_state_config(TIMER0, TIMER_CH_1, TIMER_CCX_DISABLE);
    121.         timer_channel_complementary_output_state_config(TIMER0, TIMER_CH_1, TIMER_CCXN_ENABLE);
    123.         /*  channel2 configuration */
    124.         timer_channel_output_state_config(TIMER0, TIMER_CH_2, TIMER_CCX_DISABLE);
    125.         timer_channel_complementary_output_state_config(TIMER0, TIMER_CH_2, TIMER_CCXN_DISABLE);
    127.          Delay_ms(7);
    131.     }
    133. }
    135. /* retarget the C library printf function to the USART */
    136. int fputc(int ch, FILE *f)
    137. {
    138.     usart_data_transmit(EVAL_COM, (uint8_t)ch);
    139.     while(RESET == usart_flag_get(EVAL_COM, USART_FLAG_TBE));
    140.     return ch;
    141. }