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Help the compiler optimize out the terminating resistor

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Use get_term to make sure the compiler can identify that the branch will always fail.

Signed-off-by: Daniel Trevitz <daniel.trevitz@wika.com>
This commit is contained in:
Daniel Trevitz 2022-10-12 19:07:22 -04:00
parent 0a1d6dc920
commit d991308d63
1 changed files with 5 additions and 3 deletions
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8
src/usbd_gs_can.c
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@ -394,9 +394,11 @@ static uint8_t USBD_GS_CAN_EP0_RxReady(USBD_HandleTypeDef *pdev) {
break;
case GS_USB_BREQ_SET_TERMINATION:
memcpy(&param_u32, hcan->ep0_buf, sizeof(param_u32));
if (set_term(req->wValue, param_u32) == GS_CAN_TERMINATION_UNSUPPORTED) {
USBD_CtlError(pdev, req);
if (get_term(req->wValue) != GS_CAN_TERMINATION_UNSUPPORTED) {
memcpy(&param_u32, hcan->ep0_buf, sizeof(param_u32));
if (set_term(req->wValue, param_u32) == GS_CAN_TERMINATION_UNSUPPORTED) {
USBD_CtlError(pdev, req);
}
}
break;