usbdev_stm32.h

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/*
 * Copyright (C) 2019 Koen Zandberg
 *
 * This file is subject to the terms and conditions of the GNU Lesser
 * General Public License v2.1. See the file LICENSE in the top level
 * directory for more details.
 */
 
#ifndef USBDEV_STM32_H
#define USBDEV_STM32_H
 
#include <stdint.h>
#include <stdlib.h>
#include "periph_cpu.h"
#include "periph/usbdev.h"
 
#ifdef __cplusplus
extern "C" {
#endif
 
/* Detect the IP version based on the available register define */
#if defined(USB_OTG_GCCFG_NOVBUSSENS)
#define STM32_USB_OTG_CID_1x        
#elif defined(USB_OTG_GCCFG_VBDEN)
#define STM32_USB_OTG_CID_2x        
#else
#error Unknown USB peripheral version
#endif
 
#ifndef STM32_USB_OTG_BUF_SPACE
#define STM32_USB_OTG_BUF_SPACE  USBDEV_EP_BUF_SPACE
#endif
 
#ifdef STM32_USB_OTG_CID_1x
#define STM32_USB_OTG_FS_NUM_EP (4) 
#elif defined(STM32_USB_OTG_CID_2x)
#define STM32_USB_OTG_FS_NUM_EP (6) 
#endif
 
#ifdef STM32_USB_OTG_CID_1x
#define STM32_USB_OTG_HS_NUM_EP (6) 
#elif defined(STM32_USB_OTG_CID_2x)
#define STM32_USB_OTG_HS_NUM_EP (9) 
#endif
 
#ifndef STM32_USB_OTG_FS_RX_FIFO_SIZE
#define STM32_USB_OTG_FS_RX_FIFO_SIZE   (128U)
#endif
 
#ifndef STM32_USB_OTG_HS_RX_FIFO_SIZE
#define STM32_USB_OTG_HS_RX_FIFO_SIZE   (512U)
#endif
 
#ifndef STM32_USB_OTG_HS_USE_DMA
#ifdef STM32_USB_OTG_CID_1x
/* FIXME: It should be possible to use DMA with the 1.x version of the  *
 * peripheral, but somehow it doesn't work.                             */
#define STM32_USB_OTG_HS_USE_DMA        (0)
#else
#define STM32_USB_OTG_HS_USE_DMA        (1)
#endif
#endif
 
typedef struct {
    usbdev_t usbdev;                            
    const stm32_usb_otg_fshs_config_t *config;  
    uint8_t buffer[STM32_USB_OTG_BUF_SPACE];    
    size_t occupied;                            
    size_t fifo_pos;                            
    usbdev_ep_t *in;                            
    usbdev_ep_t *out;                           
    bool suspend;                               
} stm32_usb_otg_fshs_t;
 
#ifdef __cplusplus
}
#endif
#endif /* USBDEV_STM32_H */