Posted on May 25, 2017 at 08:47
Hi,
Generally i do like
Option 1)
unsigned char tmp;
unsigned char *ptr='Hello World!';
for(tmp=0;tmp<10;tmp++){
HAL_UART_Transmit(&huart1,ptr,strlen(ptr),100);
HAL_Delay(10); //10ms
}
Option 2)
Start TIM2 ,which generate interrupt every 10ms.
unsigned char *ptr='Hello World!';
void TIM2_IRQHandler(void)
{
static unsigned char tmp;
HAL_UART_Transmit(&
huart1,&ptr[tmp],1,100);
if(++tmp<=strlen(ptr)){
tmp=0;
}
HAL_TIM_IRQHandler(&htim2);
}
Is there way Above whole process goes in backend, like calling function
HAL_UART_Transmit_DMA_TIM();
As we do in DAC transfer data on output after timer update interrupt on backend.
How can i generate USART Tx DMA using timer expire on backend without any CPU intervention like DAC with Timer?
I read that there is way to do using DMA2 Memory to Memory copy using Timer. How Can i do this?
Please answer using HAL library template code only.
Thanks to ST Community.
Sukhdeep Singh
