最近在用赤兔板子调试lcd，st7789，里面有这么一段代码：
void LCD_GPIOInit(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOB| RCC_APB2Periph_TIM1, ENABLE );
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_14;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init( GPIOB, &GPIO_InitStructure );
rt_kprintf("LCD manufacturer ID41\n\r ");
TIM_OCInitTypeDef TIM_OCInitStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure;
TIM_TimeBaseInitStructure.TIM_Period = 100;
TIM_TimeBaseInitStructure.TIM_Prescaler = 288-1;
TIM_TimeBaseInitStructure.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit( TIM1, &TIM_TimeBaseInitStructure );
rt_kprintf("LCD manufacturer ID42\n\r ");
#if (PWM_MODE == PWM_MODE1)
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
#elif (PWM_MODE == PWM_MODE2)
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2;
#endif
TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;
TIM_OCInitStructure.TIM_Pulse = 50;
TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High;
TIM_OC2Init( TIM1, &TIM_OCInitStructure );
rt_kprintf("LCD manufacturer ID43\n\r ");
TIM_CtrlPWMOutputs( TIM1, ENABLE );
TIM_OC2PreloadConfig( TIM1, TIM_OCPreload_Disable );
TIM_ARRPreloadConfig( TIM1, ENABLE );
rt_kprintf("LCD manufacturer ID44\n\r ");
TIM_Cmd( TIM1, ENABLE );
// printf("LCD manufacturer ID45\n\r ");
}
上面代码是使用gpiob的pin14作为亮度调节输出。当不用rtthread时，使用debug.c里的printf打印，输出数据一切正常；当我用rtthread后，使用rt_kprint打印，就输出乱码，在
TIM_Cmd( TIM1, ENABLE );
之前的所有打印都正常，在其之后的所有打印都输出乱码
\ | /
- RT - Thread Operating System
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MCU: CH32V307
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LCD manufacturer ID1
LCD manufacturer ID2
LCD manufacturer ID41
LCD manufacturer ID42
LCD manufacturer ID43
LCD manufacturer ID44
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