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stm32f4: Start implementing dcd_edpt_xfer.

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This commit is contained in:
William D. Jones 2019-01-22 00:42:43 -05:00
parent 69f5f18fd6
commit 43c890615a
1 changed files with 40 additions and 3 deletions
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43
src/portable/stm/stm32f4/dcd_stm32f4.c
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@ -51,10 +51,21 @@
#define IN_EP_BASE (USB_OTG_INEndpointTypeDef *) (USB_OTG_FS_PERIPH_BASE + USB_OTG_IN_ENDPOINT_BASE)
#define FIFO_BASE(_x) (uint32_t *) (USB_OTG_FS_PERIPH_BASE + USB_OTG_FIFO_BASE + _x * USB_OTG_FIFO_SIZE)
static ATTR_ALIGNED(4) uint32_t _setup_packet[6];
static uint8_t _setup_offs; // We store up to 3 setup packets.
typedef struct {
uint8_t * buffer;
uint16_t total_len;
uint16_t queued_len;
uint8_t max_size;
} xfer_ctl_t;
xfer_ctl_t xfer_status[4][2];
#define XFER_CTL_BASE(_ep, _dir) &xfer_status[_ep][_dir]
// Setup the control endpoint 0.
static void bus_reset(void) {
USB_OTG_DeviceTypeDef * dev = DEVICE_BASE;
@ -210,9 +221,35 @@ bool dcd_edpt_open (uint8_t rhport, tusb_desc_endpoint_t const * desc_edpt)
bool dcd_edpt_xfer (uint8_t rhport, uint8_t ep_addr, uint8_t * buffer, uint16_t total_bytes)
{
(void) rhport;
//USB_OTG_DeviceTypeDef * dev = DEVICE_BASE;
//USB_OTG_OUTEndpointTypeDef * out_ep = OUT_EP_BASE;
USB_OTG_INEndpointTypeDef * in_ep = IN_EP_BASE;
// uint8_t const epnum = edpt_number(ep_addr);
// uint8_t const dir = edpt_dir(ep_addr);
uint8_t const epnum = tu_edpt_number(ep_addr);
uint8_t const dir = tu_edpt_dir(ep_addr);
xfer_ctl_t * xfer = XFER_CTL_BASE(epnum, dir);
xfer->buffer = buffer;
xfer->total_len = total_bytes;
xfer->queued_len = 0;
// IN and OUT endpoint xfers are interrupt-driven, we just schedule them
// here.
if(dir == TUSB_DIR_IN) {
uint8_t short_packet_size = total_bytes % xfer->max_size;
uint16_t num_packets = (total_bytes / xfer->max_size);
// Zero-size packet is special case.
if(short_packet_size > 0 || (total_bytes == 0)) {
num_packets++;
}
in_ep[epnum].DIEPTSIZ = (num_packets << USB_OTG_DIEPTSIZ_PKTCNT_Pos) | \
((total_bytes & USB_OTG_DIEPTSIZ_XFRSIZ_Msk) << USB_OTG_DIEPTSIZ_XFRSIZ_Pos);
in_ep[epnum].DIEPCTL |= USB_OTG_DIEPCTL_EPENA | USB_OTG_DIEPCTL_CNAK;
} else {
}
//
// UsbDeviceDescBank* bank = &sram_registers[epnum][dir];
// UsbDeviceEndpoint* ep = &USB->DEVICE.DeviceEndpoint[epnum];