static void udd_ctrl_setup_received(void)
{
irqflags_t flags;
if (UDD_EPCTRL_SETUP != udd_ep_control_state) {
// May be a hidden DATA or ZLP phase
// or protocol abort
udd_ctrl_endofrequest();
// Reinitializes control endpoint management
udd_ctrl_init();
}
// Fill setup request structure
if (8 != udd_udesc_get_buf0_ctn(0)) {
udd_ctrl_stall_data();
udd_ack_setup_received(0);
return; // Error data number doesn't correspond to SETUP packet
}
memcpy((uint8_t *) & udd_g_ctrlreq.req, udd_ctrl_buffer, 8);
// Manage LSB/MSB to fit with CPU usage
udd_g_ctrlreq.req.wValue = le16_to_cpu(udd_g_ctrlreq.req.wValue);
udd_g_ctrlreq.req.wIndex = le16_to_cpu(udd_g_ctrlreq.req.wIndex);
udd_g_ctrlreq.req.wLength = le16_to_cpu(udd_g_ctrlreq.req.wLength);
// Decode setup request
if (udc_process_setup() == false) {
// Setup request unknown then stall it
udd_ctrl_stall_data();
udd_ack_setup_received(0);
return;
}
udd_ack_setup_received(0);
if (Udd_setup_is_in()) {
// IN data phase requested
udd_ctrl_prev_payload_nb_trans = 0;
udd_ctrl_payload_nb_trans = 0;
udd_ep_control_state = UDD_EPCTRL_DATA_IN;
udd_ctrl_in_sent(); // Send first data transfer
} else {
if (0 == udd_g_ctrlreq.req.wLength) {
// No data phase requested
// Send IN ZLP to ACK setup request
udd_ctrl_send_zlp_in();
return;
}
// OUT data phase requested
udd_ctrl_prev_payload_nb_trans = 0;
udd_ctrl_payload_nb_trans = 0;
udd_ep_control_state = UDD_EPCTRL_DATA_OUT;
// To detect a protocol error, enable nak interrupt on data IN phase
udd_ack_nak_in(0);
flags = cpu_irq_save();
udd_enable_nak_in_interrupt(0);
cpu_irq_restore(flags);
}
}
static void udd_ctrl_setup_received(void)
{
uint8_t i;
if (UDD_EPCTRL_SETUP != udd_ep_control_state) {
// May be a hidden DATA or ZLP phase
// or protocol abort
udd_ctrl_endofrequest();
// Reinitializes control endpoint management
udd_ctrl_init();
}
// Fill setup request structure
if (8 != udd_byte_count(0)) {
udd_ack_setup_received(0);
udd_ctrl_stall_data();
return; // Error data number doesn't correspond to SETUP packet
}
for (i = 0; i < 8; i++) {
((uint8_t *) & udd_g_ctrlreq.req)[i] =
udd_endpoint_fifo_read(0);
}
// Manage LSB/MSB to fit with CPU usage
udd_g_ctrlreq.req.wValue = le16_to_cpu(udd_g_ctrlreq.req.wValue);
udd_g_ctrlreq.req.wIndex = le16_to_cpu(udd_g_ctrlreq.req.wIndex);
udd_g_ctrlreq.req.wLength = le16_to_cpu(udd_g_ctrlreq.req.wLength);
// Decode setup request
if (udc_process_setup() == false) {
// Setup request unknown then stall it
udd_ack_setup_received(0);
udd_ctrl_stall_data();
return;
}
if (Udd_setup_is_in()) {
// Set DIR
udd_set_endpoint_direction_in(0);
udd_ack_setup_received(0);
// IN data phase requested
udd_ctrl_prev_payload_nb_trans = 0;
udd_ctrl_payload_nb_trans = 0;
udd_ep_control_state = UDD_EPCTRL_DATA_IN;
udd_ctrl_in_sent(); // Send first data transfer
} else {
udd_ack_setup_received(0);
if (0 == udd_g_ctrlreq.req.wLength) {
// No data phase requested
// Send IN ZLP to ACK setup request
udd_ctrl_send_zlp_in();
return;
}
// OUT data phase requested
udd_ctrl_prev_payload_nb_trans = 0;
udd_ctrl_payload_nb_trans = 0;
udd_ep_control_state = UDD_EPCTRL_DATA_OUT;
}
}
//! \brief Waits a SETUP packet and load data in main_setup_packet[]
static void main_usb_wait_setup_packet(void)
{
while (!Is_udd_setup_received(0));
// SETUP packet received
Assert(8 == udd_byte_count(0));
uint8_t *ptr = (uint8_t *) & udd_get_endpoint_fifo_access(0,8);
for (uint8_t i = 0; i < 8; i++) {
((uint8_t*) &main_setup_packet)[i] = *ptr++;
}
udd_ack_setup_received(0);
}
static void udd_ctrl_setup_received(void)
{
irqflags_t flags;
uint8_t i;
if (UDD_EPCTRL_SETUP != udd_ep_control_state) {
// May be a hidden DATA or ZLP phase
// or protocol abort
udd_ctrl_endofrequest();
// Reinitializes control endpoint management
udd_ctrl_init();
}
// Fill setup request structure
if (8 != udd_byte_count(0)) {
udd_ctrl_stall_data();
udd_ack_setup_received(0);
return; // Error data number doesn't correspond to SETUP packet
}
uint32_t *ptr = (uint32_t *) & udd_get_endpoint_fifo_access(0, 32);
for (i = 0; i < 8 / 4; i++) {
((uint32_t *) & udd_g_ctrlreq.req)[i] = *ptr++;
}
// Manage LSB/MSB to fit with CPU usage
udd_g_ctrlreq.req.wValue = le16_to_cpu(udd_g_ctrlreq.req.wValue);
udd_g_ctrlreq.req.wIndex = le16_to_cpu(udd_g_ctrlreq.req.wIndex);
udd_g_ctrlreq.req.wLength = le16_to_cpu(udd_g_ctrlreq.req.wLength);
// Decode setup request
if (udc_process_setup() == false) {
// Setup request unknow then stall it
udd_ctrl_stall_data();
udd_ack_setup_received(0);
return;
}
udd_ack_setup_received(0);
if (Udd_setup_is_in()) {
// Compute if an IN ZLP must be send after IN data
udd_ctrl_payload_need_in_zlp =
((udd_g_ctrlreq.payload_size %
USB_DEVICE_EP_CTRL_SIZE) == 0);
// IN data phase requested
udd_ctrl_prev_payload_nb_trans = 0;
udd_ctrl_payload_nb_trans = 0;
udd_ep_control_state = UDD_EPCTRL_DATA_IN;
udd_ctrl_in_sent(); // Send first data transfer
} else {
if (0 == udd_g_ctrlreq.req.wLength) {
// No data phase requested
// Send IN ZLP to ACK setup request
udd_ctrl_send_zlp_in();
return;
}
// OUT data phase requested
udd_ctrl_prev_payload_nb_trans = 0;
udd_ctrl_payload_nb_trans = 0;
udd_ep_control_state = UDD_EPCTRL_DATA_OUT;
// To detect a protocol error, enable nak interrupt on data IN phase
udd_ack_nak_in(0);
flags = cpu_irq_save();
udd_enable_nak_in_interrupt(0);
cpu_irq_restore(flags);
}
}
//! \brief Enables the control endpoint STALL after a SETUP packet reception
static void main_usb_stall_after_setup_packet(void)
{
udd_enable_stall_handshake(0);
udd_ack_setup_received(0);
}