DSP6748 UART模块的多字节连续发送是否有支持的库函数

按照手册来看只要发送fifo为空就会触发中断，并且当THR写入一个字符就会清除中断。看一下Table 30-11. Interrupt Identification and Interrupt Clearing Information

www.ti.com/.../spruh79c.pdf

建议试一下DMA传输，当发送fifo为空时，uart会发送UTXEVT给EDMA，作为应答，EDMA会重新填满FIFO.

Transmit event (UTXEVT): When the transmitter FIFO is empty (when the last byte in the transmitter

FIFO has been copied to the transmitter shift register), the UART sends an UTXEVT signal to the

EDMA controller. In response, the EDMA controller refills the transmitter FIFO by way of the transmitter

holding register (THR).