1 /*---------------------------------------------------------------------------*\
2 
3   FILE........: stm32f4_usb_vcp.c
4   AUTHOR......: xenovacivus
5   DATE CREATED: 3 Sep 2014
6 
7   USB Virtual COM Port (VCP) module adapted from code I found here:
8 
9     https://github.com/xenovacivus/STM32DiscoveryVCP
10 
11 \*---------------------------------------------------------------------------*/
12 
13 #include "stm32f4xx_conf.h"
14 #include "stm32f4xx.h"
15 #include "stm32f4xx_gpio.h"
16 #include "stm32f4xx_rcc.h"
17 #include "stm32f4xx_exti.h"
18 #include "usbd_cdc_core.h"
19 #include "usbd_usr.h"
20 #include "usbd_desc.h"
21 #include "usbd_cdc_vcp.h"
22 #include "usb_dcd_int.h"
23 #include "sm1000_leds_switches.h"
24 #include "stm32f4_usb_vcp.h"
25 
26 /*
27  * The USB data must be 4 byte aligned if DMA is enabled. This macro handles
28  * the alignment, if necessary (it's actually magic, but don't tell anyone).
29  */
30 __ALIGN_BEGIN USB_OTG_CORE_HANDLE  USB_OTG_dev __ALIGN_END;
31 
32 
33 /*
34  * Define prototypes for interrupt handlers here. The conditional "extern"
35  * ensures the weak declarations from startup_stm32f4xx.c are overridden.
36  */
37 #ifdef __cplusplus
38  extern "C" {
39 #endif
40 
41 void NMI_Handler(void);
42 void HardFault_Handler(void);
43 void MemManage_Handler(void);
44 void BusFault_Handler(void);
45 void UsageFault_Handler(void);
46 void SVC_Handler(void);
47 void DebugMon_Handler(void);
48 void PendSV_Handler(void);
49 void OTG_FS_IRQHandler(void);
50 void OTG_FS_WKUP_IRQHandler(void);
51 
52 #ifdef __cplusplus
53 }
54 #endif
55 
56 
usb_vcp_init()57 void usb_vcp_init() {
58 	/* Setup USB */
59 	USBD_Init(&USB_OTG_dev,
60 	            USB_OTG_FS_CORE_ID,
61 	            &USR_desc,
62 	            &USBD_CDC_cb,
63 	            &USR_cb);
64 }
65 
66 
67 /*
68  * Interrupt Handlers
69  */
70 
NMI_Handler(void)71 void NMI_Handler(void)       {}
SVC_Handler(void)72 void SVC_Handler(void)       {}
DebugMon_Handler(void)73 void DebugMon_Handler(void)  {}
PendSV_Handler(void)74 void PendSV_Handler(void)    {}
75 
OTG_FS_IRQHandler(void)76 void OTG_FS_IRQHandler(void)
77 {
78   USBD_OTG_ISR_Handler (&USB_OTG_dev);
79 }
80 
OTG_FS_WKUP_IRQHandler(void)81 void OTG_FS_WKUP_IRQHandler(void)
82 {
83   if(USB_OTG_dev.cfg.low_power)
84   {
85     *(uint32_t *)(0xE000ED10) &= 0xFFFFFFF9 ;
86     SystemInit();
87     USB_OTG_UngateClock(&USB_OTG_dev);
88   }
89   EXTI_ClearITPendingBit(EXTI_Line18);
90 }
91