Dear all，
I am using the usart2 of the STM32F767 to implement the Modbus function.
I used the Receiver timeout interrupt to detect if a piece of data is over.
However,sometimes a timeout interrupt had occurred. when data is still receive.
I set the timeout to 35 and the baud rate is 9600. Where is the wrong? I hope to get your help.
this is my code about usart init：
void uart2_init(u32 pclk1,u32 bound)
{
u32 temp;
temp=(pclk1*1000000+bound/2)/bound;
PCF8574_Init();
RCC->AHB1ENR|=1<<0;
GPIO_Set(GPIOA,PIN2|PIN3,GPIO_MODE_AF,GPIO_OTYPE_PP,GPIO_SPEED_50M,GPIO_PUPD_PU);
GPIO_AF_Set(GPIOA,2,7);
GPIO_AF_Set(GPIOA,3,7);
RCC->APB1ENR|=1<<17;
RCC->APB1RSTR|=1<<17;
RCC->APB1RSTR&=~(1<<17);
USART2->BRR=temp;
USART2->CR1=0;
USART2->CR1|=0<<28;
USART2->CR1|=0<<12;
USART2->CR1|=0<<15;
USART2->CR1|=1<<3;
#if EN_USART2_RX
USART2->CR1|=1<<2;
USART2->CR2 |= 1 << 23;
USART2->CR1 |= 1 << 26;
USART2->RTOR |= 35;
USART2->CR1|=1<<5;
MY_NVIC_Init(3,3,USART2_IRQn,2);
#endif
USART2->CR1|=1<<0;
RS485_TX_Set(0);
}
And this is the phenomenon：
In the box that is circled below, there are fewer data received than the above.
