[参考译文] CC1312R：SPICC26X2DMA.c中线路258处的奇怪开关盒脱落

https://e2e.ti.com/support/wireless-connectivity/sub-1-ghz-group/sub-1-ghz/f/sub-1-ghz-forum/1102764/cc1312r-strange-switch-case-fall-through-at-line-258-in-spicc26x2dma-c

您好，

我在simplelink_cc13xx/source/ti/drivers/SPI/SPICC26X2DMA.c中的第258行看到了一个掉线

(Simplelink 6.10 ．0.29)

        case SPICC26X2DMA_CMD_SET_CSN_PIN:
            pinIndex = *((uint_least8_t*) arg);

            if (pinIndex == GPIO_INVALID_INDEX) {
                /* If trying to disable the CS pin, forward to the CLEAR_CSN command and break */
                ret = SPICC26X2DMA_control(handle, SPICC26X2DMA_CMD_CLEAR_CSN_PIN, NULL);
                break;
            }

            /* Reset the previous CS pin and configure the new one */
            GPIO_resetConfig(object->csnPin);
            object->csnPin = pinIndex;
            GPIO_setMux(object->csnPin, hwAttrs->csnPinMux);

            ret = SPI_STATUS_SUCCESS;

        case SPICC26X2DMA_CMD_CLEAR_CSN_PIN:
            /* If the CS pin is assigned, reset and unassign it */
            if (object->csnPin != GPIO_INVALID_INDEX) {
                GPIO_resetConfig(object->csnPin);
                object->csnPin = GPIO_INVALID_INDEX;
            }
            ret = SPI_STATUS_SUCCESS;
            break;

它看起来很奇怪，它真的是有意的吗？

巴西

Tomas Olsson