Re: [Freetel-codec2] Serial USART implementation

[glen english]

and furthermore to my previous USART post Eric, you are going to have to implement a USASRT interrupt handler anyway. why ? Because you need to handle an error condition as it happens. This is for any peripheral, DMA or not. So, using the usart, just have a single IRQ handler  that does everything, and enable all IRQ flags so it is a catch all. Now, if you want fast SPI, so 42 Mbps (what I do on all four ports) I use DMA for transfer , but I still have a interrupt but have the IRQ flags only for errors- IE normal TXE or RXNE dont generate interrupts (they trigger a DMA xfer) in that case but ERR does. The peripherals are quite complex compared to the AVR days. And poorly behaved. Read the errata for the chip part number you have With 20 page errata, there will be something affecting what you are doing.... glen On 7/09/2016 6:17 AM, e...@vk5kbb.com wrote: Yes I was hoping to use a FIFO as that how I do it on the PIC, however was looking at the datasheet and didnt see any implementation of one, just DMA. I will have to look closer. Thanks. Eric   On 2016-09-06 19:14, Bruce Perens wrote: In sm1000? Since there is no OS you either have to hook into the busy loop or write interrupt code. If the FIFO is deep enough to queue a command, the code will not be time critical and you can do it in the loop. No DMA necessary. On Sep 6, 2016 7:51 AM, "Shane Burrell" <sh...@shaneburrell.com> wrote: You shouldn't have any problems doing that via DMA UART On Tue, Sep 6, 2016 at 9:52 AM, <e...@vk5kbb.com> wrote: I'm wondering if any body has managed to implement the serial USART in a manner that does not interfere with the encode/decode process. Will be doing away with the switch menu and assume I can send and receive data to the USART in its place as the USART functions independently via DMA and hence shouldn't interfere with any thing I hope. I'm basically implementing the Yaesu CAT interface and want to send 5 bytes and receives 5 bytes once a second at 9600 baud. Thoughts?   Cheers Eric   ------------------------------------------------------------------------------ _______________________________________________ Freetel-codec2 mailing list Freetel-codec2@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/freetel-codec2 ------------------------------------------------------------------------------ _______________________________________________ Freetel-codec2 mailing list Freetel-codec2@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/freetel-codec2 ------------------------------------------------------------------------------ _______________________________________________ Freetel-codec2 mailing list Freetel-codec2@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/freetel-codec2     ------------------------------------------------------------------------------ _______________________________________________ Freetel-codec2 mailing list Freetel-codec2@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/freetel-codec2

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