UARTの受信DMA処理の定石 SPIDMAUART DMA 3DMA for (;;) { ; if () { int count; // DMA int prev; UART; count = getDMACount(); ...--prophetes.ai

UARTの受信DMA処理の定石 SPIDMAUART DMA 3DMA for (;;) { ; if () { int count; // DMA int prev; UART; count = getDMACount(); prev = index; index ^= 1; // DMA // // setDMABuffer(duble_buffer[index]); UART; if (count > 0) { // memcpy(main_buffer + last, duble_buffer[prev], count); last += count; } } } Linux

DMA

( ppm ppb ) DMA

USB Isochronous
\- Transaction
\- Transaction
\- Transaction
DMA

\- DMA

UART DMA __