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Implement dynamic reallocation of RX and TX fifos for EP0.

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Tested with EP0 size 8/16/32/64.
This commit is contained in:
Reinhard Panhuber
2020-07-27 21:03:20 +02:00
parent 5e3f90cd6e
commit 01903a4a6d
3 changed files with 91 additions and 56 deletions
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4
src/device/dcd.h
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@@ -115,6 +115,10 @@ void dcd_connect(uint8_t rhport) TU_ATTR_WEAK;
// Disconnect by disabling internal pull-up resistor on D+/D-
void dcd_disconnect(uint8_t rhport) TU_ATTR_WEAK;
// Invoked when a set configuration request was received
// Helper to allow for dynamic EP buffer allocation according to configuration descriptor
TU_ATTR_WEAK bool dcd_alloc_mem_for_conf(uint8_t rhport, tusb_desc_configuration_t const * desc_cfg);
//--------------------------------------------------------------------+
// Endpoint API
//--------------------------------------------------------------------+

17
src/device/usbd.c
View File

@@ -46,7 +46,6 @@ typedef struct
{
volatile uint8_t connected : 1;
volatile uint8_t addressed : 1;
volatile uint8_t configured : 1;
volatile uint8_t suspended : 1;
uint8_t remote_wakeup_en : 1; // enable/disable by host
@@ -54,6 +53,7 @@ typedef struct
uint8_t self_powered : 1; // configuration descriptor's attribute
};
volatile uint8_t cfg_num; // current active configuration (0x00 is not configured)
uint8_t speed;
uint8_t itf2drv[16]; // map interface number to driver (0xff is invalid)
@@ -314,7 +314,7 @@ tusb_speed_t tud_speed_get(void)
bool tud_mounted(void)
{
return _usbd_dev.configured;
return _usbd_dev.cfg_num ? 1 : 0;
}
bool tud_suspended(void)
@@ -583,8 +583,8 @@ static bool process_control_request(uint8_t rhport, tusb_control_request_t const
case TUSB_REQ_GET_CONFIGURATION:
{
uint8_t cfgnum = _usbd_dev.configured ? 1 : 0;
tud_control_xfer(rhport, p_request, &cfgnum, 1);
uint8_t cfg_num = _usbd_dev.cfg_num;
tud_control_xfer(rhport, p_request, &cfg_num, 1);
}
break;
@@ -592,9 +592,9 @@ static bool process_control_request(uint8_t rhport, tusb_control_request_t const
{
uint8_t const cfg_num = (uint8_t) p_request->wValue;
if ( !_usbd_dev.configured && cfg_num ) TU_ASSERT( process_set_config(rhport, cfg_num) );
if ( !_usbd_dev.cfg_num && cfg_num ) TU_ASSERT( process_set_config(rhport, cfg_num) );
_usbd_dev.configured = cfg_num ? 1 : 0;
_usbd_dev.cfg_num = cfg_num;
tud_control_status(rhport, p_request);
}
@@ -746,6 +746,9 @@ static bool process_set_config(uint8_t rhport, uint8_t cfg_num)
tusb_desc_configuration_t const * desc_cfg = (tusb_desc_configuration_t const *) tud_descriptor_configuration_cb(cfg_num-1); // index is cfg_num-1
TU_ASSERT(desc_cfg != NULL && desc_cfg->bDescriptorType == TUSB_DESC_CONFIGURATION);
// Allow for dynamic allocation of EP buffer for current configuration - only one configuration may be active according to USB specification
if (dcd_alloc_mem_for_conf) TU_ASSERT(dcd_alloc_mem_for_conf(rhport, desc_cfg));
// Parse configuration descriptor
_usbd_dev.remote_wakeup_support = (desc_cfg->bmAttributes & TUSB_DESC_CONFIG_ATT_REMOTE_WAKEUP) ? 1 : 0;
_usbd_dev.self_powered = (desc_cfg->bmAttributes & TUSB_DESC_CONFIG_ATT_SELF_POWERED) ? 1 : 0;
@@ -951,7 +954,7 @@ void dcd_event_handler(dcd_event_t const * event, bool in_isr)
case DCD_EVENT_UNPLUGGED:
_usbd_dev.connected = 0;
_usbd_dev.addressed = 0;
_usbd_dev.configured = 0;
_usbd_dev.cfg_num = 0;
_usbd_dev.suspended = 0;
osal_queue_send(_usbd_q, event, in_isr);
break;