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Added usbd_ep_nak_set() to force flow control on OUT endpoints.

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This commit is contained in:
Gareth McMullin
2011-03-30 07:17:02 +13:00
parent 692266bf67
commit ef0ff192f7
5 changed files with 49 additions and 2 deletions
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21
lib/usb/usb_f103.c
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@@ -30,10 +30,13 @@ static void stm32f103_ep_setup(u8 addr, u8 type, u16 max_size,
static void stm32f103_endpoints_reset(void);
static void stm32f103_ep_stall_set(u8 addr, u8 stall);
static u8 stm32f103_ep_stall_get(u8 addr);
static void stm32f103_ep_nak_set(u8 addr, u8 nak);
static u16 stm32f103_ep_write_packet(u8 addr, const void *buf, u16 len);
static u16 stm32f103_ep_read_packet(u8 addr, void *buf, u16 len);
static void stm32f103_poll(void);
static u8 force_nak[8];
const struct _usbd_driver stm32f103_usb_driver = {
.init = stm32f103_usbd_init,
.set_address = stm32f103_set_address,
@@ -41,6 +44,7 @@ const struct _usbd_driver stm32f103_usb_driver = {
.ep_reset = stm32f103_endpoints_reset,
.ep_stall_set = stm32f103_ep_stall_set,
.ep_stall_get = stm32f103_ep_stall_get,
.ep_nak_set = stm32f103_ep_nak_set,
.ep_write_packet = stm32f103_ep_write_packet,
.ep_read_packet = stm32f103_ep_read_packet,
.poll = stm32f103_poll,
@@ -177,6 +181,20 @@ static u8 stm32f103_ep_stall_get(u8 addr)
return 0;
}
static void stm32f103_ep_nak_set(u8 addr, u8 nak)
{
/* It does not make sence to force NAK on IN endpoints */
if(addr & 0x80)
return;
force_nak[addr] = nak;
if(nak)
USB_SET_EP_RX_STAT(addr, USB_EP_RX_STAT_NAK);
else
USB_SET_EP_RX_STAT(addr, USB_EP_RX_STAT_VALID);
}
/**
* Copy a data buffer to packet memory.
*
@@ -236,7 +254,8 @@ static u16 stm32f103_ep_read_packet(u8 addr, void *buf, u16 len)
usb_copy_from_pm(buf, USB_GET_EP_RX_BUFF(addr), len);
USB_CLR_EP_RX_CTR(addr);
USB_SET_EP_RX_STAT(addr, USB_EP_RX_STAT_VALID);
if(!force_nak[addr])
USB_SET_EP_RX_STAT(addr, USB_EP_RX_STAT_VALID);
return len;
}