67 lines
1.8 KiB
C
67 lines
1.8 KiB
C
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#ifndef __HARDWARE_USB_H__
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#define __HARDWARE_USB_H__
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#include "usb_reg.h"
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#include "usb_common.h"
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typedef void (*usb_ep_handler)(uint8_t *buf, uint16_t len);
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// Struct in which we keep the endpoint configuration
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struct usb_endpoint_configuration {
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const struct usb_endpoint_descriptor *descriptor;
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usb_ep_handler handler;
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// Pointers to endpoint + buffer control registers
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// in the USB controller DPSRAM
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volatile uint32_t *endpoint_control;
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volatile uint32_t *buffer_control;
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volatile uint8_t *data_buffer;
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// Toggle after each packet (unless replying to a SETUP)
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uint8_t next_pid;
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};
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// Struct in which we keep the device configuration
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struct usb_device_configuration {
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const struct usb_device_descriptor *device_descriptor;
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const struct usb_interface_descriptor *interface_descriptor;
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const struct usb_configuration_descriptor *config_descriptor;
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const unsigned char *lang_descriptor;
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const unsigned char **descriptor_strings;
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// USB num endpoints is 16
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struct usb_endpoint_configuration endpoints[USB_NUM_ENDPOINTS];
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};
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifndef MIN
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#define MIN(a,b) ((a)<(b)?(a):(b))
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#endif
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#ifndef MAX
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#define MAX(a,b) ((a)>(b)?(a):(b))
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#endif
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/**
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* @brief Given an endpoint configuration, returns true if the endpoint
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* is transmitting data to the host (i.e. is an IN endpoint)
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*
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* @param ep, the endpoint configuration
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* @return true
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* @return false
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*/
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static inline int ep_is_tx(struct usb_endpoint_configuration *ep) {
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return ep->descriptor->bEndpointAddress & USB_DIR_IN;
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}
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void usb_start_transfer(struct usb_endpoint_configuration *ep, uint8_t *buf, uint16_t len);
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void usb_device_init(struct usb_device_configuration *dev_config);
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struct usb_endpoint_configuration *usb_get_endpoint_configuration(uint8_t addr);
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#ifdef __cplusplus
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}
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#endif
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#endif /* __HARDWARE_USB_H__ */
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