Posted on February 18, 2016 at 05:02Hi,
I'm using DMA to transfer the data from USART1,The length of the data is varible.So I open the USART IDLE LINE interrupt.I try to set the DMA data counter to zero by using the function ''DMA_SetCurrDataCounter(DMA1_Channel2,0);''
But the return value of the function ''DMA_GetCurrDataCounter(DMA1_Channel2);'' doesn't change to the value i set.
So,What's the problem?
Thank U.
MCU: stm8l051f3
Board: Custom
IDE: IAR
STM8L15x/16x/05x/AL31-L Standard Peripherals Library version:V1.6.2
USART1 RX ISR function:
INTERRUPT_HANDLER(USART1_RX_TIM5_CC_IRQHandler,28)
{
/* In order to detect unexpected events during development,
it is recommended to set a breakpoint on the following instruction.
*/
uint8_t temp=USART_ReceiveData8(USART1);
temp=DMA_GetCurrDataCounter(DMA1_Channel2);
DMA_SetCurrDataCounter(DMA1_Channel2,0);
temp=DMA_GetCurrDataCounter(DMA1_Channel2);
USART_ClearITPendingBit(USART1,USART_IT_IDLE);
}
