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aacf98a82a
* convert 0x??? hex literals to $??? literals * More label shortening for windows tasm compatibility
107 lines
3.2 KiB
C
107 lines
3.2 KiB
C
/**
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* @file transfers.c
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* @author Dean Netherton
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* @brief A simplest implementation of common usb transfer functions, based on the CH376S chip
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* @details For a basic walkthrough of the usb protocol see https://www.beyondlogic.org/usbnutshell/usb1.shtml
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* @version 1.0
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* @date 2023-09-22
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*
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* @copyright Copyright (c) 2023
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*
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*/
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#include "dev_transfers.h"
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#include "ch376.h"
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#include "critical-section.h"
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#include "delay.h"
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#include "ez80-helpers.h"
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#include "protocol.h"
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#include <stdlib.h>
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/**
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* @brief Perform a USB control transfer (in or out)
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* See https://www.beyondlogic.org/usbnutshell/usb4.shtml for a description of the USB control transfer
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*
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* @param device the usb device
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* @param cmd_packet Pointer to the setup packet - top bit of bmRequestType indicate data direction
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* @param buffer Pointer of data to send or receive into
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* @return usb_error USB_ERR_OK if all good, otherwise specific error code
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*/
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usb_error usbdev_control_transfer(device_config *const device, const setup_packet *const cmd_packet, uint8_t *const buffer) {
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return usb_control_transfer(cmd_packet, buffer, device->address, device->max_packet_size);
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}
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usb_error usbdev_blk_out_trnsfer(device_config *const dev, const uint8_t *const buffer, const uint16_t buffer_size) {
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usb_error result;
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endpoint_param *const endpoint = &dev->endpoints[ENDPOINT_BULK_OUT];
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result = usb_data_out_transfer(buffer, buffer_size, dev->address, endpoint);
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if (result == USB_ERR_STALL) {
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usbtrn_clr_ep_halt(endpoint->number, dev->address, dev->max_packet_size);
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endpoint->toggle = 0;
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return USB_ERR_STALL;
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}
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RETURN_CHECK(result);
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done:
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return result;
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}
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usb_error usbdev_bulk_in_transfer(device_config *const dev, uint8_t *const buffer, uint8_t *const buffer_size) {
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usb_error result;
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endpoint_param *const endpoint = &dev->endpoints[ENDPOINT_BULK_IN];
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result = usb_data_in_transfer_n(buffer, buffer_size, dev->address, endpoint);
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if (result == USB_ERR_STALL) {
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usbtrn_clr_ep_halt(endpoint->number, dev->address, dev->max_packet_size);
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endpoint->toggle = 0;
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return USB_ERR_STALL;
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}
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RETURN_CHECK(result);
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done:
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return result;
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}
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usb_error usbdev_dat_in_trnsfer(device_config *const device,
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uint8_t *const buffer,
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const uint16_t buffer_size,
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const usb_endpoint_type endpoint_type) {
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usb_error result;
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endpoint_param *const endpoint = &device->endpoints[endpoint_type];
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result = usb_data_in_transfer(buffer, buffer_size, device->address, endpoint);
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if (result == USB_ERR_STALL) {
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usbtrn_clr_ep_halt(endpoint->number, device->address, device->max_packet_size);
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endpoint->toggle = 0;
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return USB_ERR_STALL;
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}
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RETURN_CHECK(result);
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done:
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return result;
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}
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usb_error usbdev_dat_in_trnsfer_0(device_config *const device, uint8_t *const buffer, const uint8_t buffer_size) {
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usb_error result;
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endpoint_param *const endpoint = &device->endpoints[0];
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result = usb_data_in_transfer(buffer, buffer_size, device->address, endpoint);
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if (result == USB_ERR_STALL) {
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usbtrn_clr_ep_halt(endpoint->number, device->address, device->max_packet_size);
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endpoint->toggle = 0;
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return USB_ERR_STALL;
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}
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return result;
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}
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