EMTime/libopencm3
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

usb/usb_lm4f: Fixed the use of pointer maths on void pointers in the packet I/O code

Browse Source
This commit is contained in:
dragonmux
2024-01-14 05:40:58 +00:00
committed by Piotr Esden-Tempski
parent 6c6f926aee
commit d7d6c3742c
1 changed files with 8 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
lib/usb/usb_lm4f.c
View File

@@ -376,15 +376,16 @@ static uint16_t lm4f_ep_write_packet(usbd_device *usbd_dev, uint8_t addr,
* the reads are downgraded to 8-bit in hardware. We lose a bit of
* performance, but we don't crash.
*/
const uint8_t *const data = (const uint8_t *)buf;
for (i = 0; i < (len & ~0x3); i += 4) {
USB_FIFO32(ep) = *((uint32_t *)(buf + i));
USB_FIFO32(ep) = *((uint32_t *)(data + i));
}
if (len & 0x2) {
USB_FIFO16(ep) = *((uint16_t *)(buf + i));
USB_FIFO16(ep) = *((uint16_t *)(data + i));
i += 2;
}
if (len & 0x1) {
USB_FIFO8(ep) = *((uint8_t *)(buf + i));
USB_FIFO8(ep) = *((uint8_t *)(data + i));
i += 1;
}
@@ -424,15 +425,16 @@ static uint16_t lm4f_ep_read_packet(usbd_device *usbd_dev, uint8_t addr,
* the writes are downgraded to 8-bit in hardware. We lose a bit of
* performance, but we don't crash.
*/
uint8_t *const data = (uint8_t *)buf;
for (len = 0; len < (rlen & ~0x3); len += 4) {
*((uint32_t *)(buf + len)) = USB_FIFO32(ep);
*((uint32_t *)(data + len)) = USB_FIFO32(ep);
}
if (rlen & 0x2) {
*((uint16_t *)(buf + len)) = USB_FIFO16(ep);
*((uint16_t *)(data + len)) = USB_FIFO16(ep);
len += 2;
}
if (rlen & 0x1) {
*((uint8_t *)(buf + len)) = USB_FIFO8(ep);
*((uint8_t *)(data + len)) = USB_FIFO8(ep);
}
if (ep == 0) {