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- driver: only poll FIFO free space if transmission size > 0

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- CDC: buffer size increased
This commit is contained in:
Wiesner András 2024-04-19 14:01:17 +02:00
parent 4cf5fb77fe
commit 8ef6249e01
2 changed files with 12 additions and 7 deletions
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4
class/cdc.c
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@ -12,11 +12,13 @@
static USB_CdcState cdcs = { 0 };
static uint8_t tx_buffer[USB_CDC_PCKT_BUFSIZE];
#define USB_CDC_FIFO_MEM_SIZE (2048)
#define USB_CDC_FIFO_MEM_SIZE (3072) // FIXME: ez vagy a blocking FIFO bugos
static uint8_t fifo_mem[USB_CDC_FIFO_MEM_SIZE];
static BFifo fifo;
void usb_cdc_read_callback(const uint8_t * data, uint32_t size);
void usb_cdc_init(const USB_CdcAssignments *as) {
// clear the structure
memset(&cdcs, 0, sizeof(USB_CdcState));

15
usb_driver.c
View File

@ -267,7 +267,7 @@ void usbdrv_build_fifo() {
if (cfg->is_configured) {
cfg->fifo_size = CEIL4(MAX(USB_MIN_GROSS_TX_FIFO_SIZE, cfg->max_packet_size)); // correct FIFO size if necessary
cfg->fifo_address = next_fifo_addr; // store FIFO address
cfg->zlp_next = false; // clear ZLP next
cfg->zlp_next = false; // clear ZLP next
next_fifo_addr += cfg->fifo_size; // advance next address
}
}
@ -476,8 +476,11 @@ uint32_t usbdrv_arm_IN_endpoint(uint8_t ep, const uint8_t *data, uint16_t len) {
}
// determine final write size
uint32_t freeSize = USBINEP[ep].DTXFSTS * sizeof(uint32_t); // get free transmit buffer size
uint16_t writeSize = MIN(freeSize, len); // limit transmit size to free size
uint32_t freeSize = 0;
if (len > 0) { // only poll DTXFSTS if (len > 0) (see datasheet)
freeSize = USBINEP[ep].DTXFSTS * sizeof(uint32_t); // get free transmit buffer size
}
uint16_t writeSize = MIN(freeSize, len); // limit transmit size to free size
// calculate packet count based on max packet size
uint16_t mps = gs.ep_IN[ep].max_packet_size;
@ -486,10 +489,10 @@ uint32_t usbdrv_arm_IN_endpoint(uint8_t ep, const uint8_t *data, uint16_t len) {
packet_count = writeSize / mps + (((writeSize % mps) > 0) ? 1 : 0);
}
// set zlp_next if transmission size is integer multiple of max packet size
// set zlp_next if transmission size is integer multiple of max packet size6
gs.ep_IN[ep].zlp_next = (writeSize > 0) && ((writeSize % mps) == 0);
// program DIEPTSIZ with transfer length (TODO: currently only a single transfer!)
// program DIEPTSIZ with transfer length
USBINEP[ep].DIEPTSIZ = (packet_count << USB_OTG_DIEPTSIZ_PKTCNT_Pos) | writeSize;
// enable endpoint and cancel responding NAK
@ -690,7 +693,7 @@ void usbdrv_process_event(uint8_t evt_code, USBDRV_EventData *evt_data) {
// see if a ZLP transmission was queued
if (gs.ep_IN[ep].zlp_next) {
usbdrv_arm_IN_endpoint(ep, NULL, 0); // send ZLP
} else { // no ZLP
} else { // no ZLP
USBMSG("IN [%d]\n", ep);
cbcpd.code = USB_CBC_IN_DONE;