I greet you! It is hope for your help!
The fact is that we have decided to base / Platform U-BOOT make its program to develop so it is ready realizovanno many software tools.
Interruption we need to make our CPU BlackFin we can use with DMA capability and maximize productivity gains.
Core, we want to use and abandonment of the CPU and DMA (BlackFin 532). In fact, we will have passed a very big massyvy in UART and use DMA, we will win big, because 90% of CPU performance will be employed mathematical calculations.
For that reason has much to use the lack of interruption, please help!
wd wrote:
In message 12896654.post@talk.nabble.com you wrote:
Our program based on U-BOOT and we need transmit data at UART-TX with interrupts.
What makes you think you need interrupts? U-Boot is strictly single tasking, so it will not do anything else anyway while transmitting, and even a very slow CPU should be capable of streaming characters out or an UART then.
But, as we understand, U-BOOT do not have "API" for correct realization Interrupts, we fount in cpu/bf532/serial.c each initialization with as-be usage Interrupts, but not used it, because only doing looping ISR register on FLAG IRQ_UART_TX_BIT.
Indeed polling is all you need.
It is not correct usage Interrupts. We need full usage interrupts.
What makes you think so? Interrupts will not give you any advantages.
Best regards,
Wolfgang Denk