abse/smart-ring-flex
A tscircuit package created by abse.
- Version
- 0.0.24
- License
- unset
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- 0
firmware/onboard-programmer/upstream/src/usb_handler.c
// ===================================================================================
// USB Handler for CH551, CH552 and CH554 * v1.5 *
// ===================================================================================
#include "usb_handler.h"
// ===================================================================================
// Variables
// ===================================================================================
volatile uint8_t USB_SetupReq, USB_SetupTyp, USB_Config, USB_Addr;
volatile uint16_t USB_SetupLen;
volatile __bit USB_ENUM_OK;
__code uint8_t* USB_pDescr;
// ===================================================================================
// Setup/Reset Endpoints
// ===================================================================================
void USB_EP_init(void) {
UEP0_DMA = (uint16_t)EP0_buffer; // EP0 data transfer address
UEP0_CTRL = UEP_R_RES_ACK // EP0 Manual flip, OUT transaction returns ACK
| UEP_T_RES_NAK; // EP0 IN transaction returns NAK
UEP0_T_LEN = 0; // must be zero at start
USB_ENUM_OK = 0; // reset ENUM flag
#ifdef USB_INIT_endpoints
USB_INIT_endpoints(); // custom EP init handler
#endif
}
// ===================================================================================
// USB Init Function
// ===================================================================================
void USB_init(void) {
USB_CTRL = bUC_DEV_PU_EN // USB internal pull-up enable
| bUC_INT_BUSY // return NAK if USB INT flag not clear
| bUC_DMA_EN; // DMA enable
UDEV_CTRL = bUD_PD_DIS // disable UDP/UDM pulldown resistor
| bUD_PORT_EN; // enable port, full-speed
USB_EP_init(); // setup endpoints
USB_INT_EN = bUIE_SUSPEND // enable device hang interrupt
| bUIE_TRANSFER // enable USB transfer completion interrupt
| bUIE_BUS_RST; // enable device mode USB bus reset interrupt
USB_INT_FG = 0x1f; // clear interrupt flags
IE_USB = 1; // enable USB interrupt
EA = 1; // enable global interrupts
}
// ===================================================================================
// Fast Copy Function
// ===================================================================================
// Copy descriptor *USB_pDescr to EP0_buffer using double pointer
// (Thanks to Ralph Doncaster)
#pragma callee_saves USB_EP0_copyDescr
void USB_EP0_copyDescr(uint8_t len) {
len; // stop unreferenced argument warning
__asm
push acc ; acc -> stack
push ar7 ; r7 -> stack
mov r7, dpl ; r7 <- len
inc _XBUS_AUX ; select dptr1
mov dptr, #_EP0_buffer ; dptr1 <- EP0_buffer
dec _XBUS_AUX ; select dptr0
mov dpl, _USB_pDescr ; dptr0 <- *USB_pDescr
mov dph, (_USB_pDescr + 1)
01$:
clr a ; acc <- #0
movc a, @a+dptr ; acc <- *USB_pDescr[dptr0]
inc dptr ; inc dptr0
.db 0xA5 ; acc -> EP0_buffer[dptr1] & inc dptr1
djnz r7, 01$ ; repeat len times
mov _USB_pDescr, dpl ; USB_pDescr += len
mov (_USB_pDescr + 1), dph
pop ar7 ; r7 <- stack
pop acc ; acc <- stack
__endasm;
}
// ===================================================================================
// Endpoint EP0 Handlers
// ===================================================================================
// Endpoint 0 SETUP handler
void USB_EP0_SETUP(void) {
uint8_t len = 0; // default is success and upload 0 length
USB_SetupLen = ((uint16_t)USB_SetupBuf->wLengthH<<8) | (USB_SetupBuf->wLengthL);
USB_SetupReq = USB_SetupBuf->bRequest;
USB_SetupTyp = USB_SetupBuf->bRequestType;
if((USB_SetupTyp & USB_REQ_TYP_MASK) == USB_REQ_TYP_STANDARD) {
switch(USB_SetupReq) { // request type
case USB_GET_DESCRIPTOR:
switch(USB_SetupBuf->wValueH) {
case USB_DESCR_TYP_DEVICE: // Device Descriptor
USB_pDescr = (uint8_t*)&DevDescr; // put descriptor into out buffer
len = sizeof(DevDescr); // descriptor length
break;
case USB_DESCR_TYP_CONFIG: // Configuration Descriptor
USB_pDescr = (uint8_t*)&CfgDescr; // put descriptor into out buffer
len = sizeof(CfgDescr); // descriptor length
break;
case USB_DESCR_TYP_STRING:
switch(USB_SetupBuf->wValueL) { // String Descriptor Index
case 0: USB_pDescr = USB_STR_DESCR_i0; break;
case 1: USB_pDescr = USB_STR_DESCR_i1; break;
case 2: USB_pDescr = USB_STR_DESCR_i2; break;
case 3: USB_pDescr = USB_STR_DESCR_i3; break;
#ifdef USB_STR_DESCR_i4
case 4: USB_pDescr = USB_STR_DESCR_i4; break;
#endif
#ifdef USB_STR_DESCR_i5
case 5: USB_pDescr = USB_STR_DESCR_i5; break;
#endif
#ifdef USB_STR_DESCR_i6
case 6: USB_pDescr = USB_STR_DESCR_i6; break;
#endif
#ifdef USB_STR_DESCR_i7
case 7: USB_pDescr = USB_STR_DESCR_i7; break;
#endif
#ifdef USB_STR_DESCR_i8
case 8: USB_pDescr = USB_STR_DESCR_i8; break;
#endif
#ifdef USB_STR_DESCR_i9
case 9: USB_pDescr = USB_STR_DESCR_i9; break;
#endif
#ifdef USB_STR_DESCR_ixee
case 0xee: USB_pDescr = USB_STR_DESCR_ixee; break;
#endif
default: USB_pDescr = USB_STR_DESCR_ix; break;
}
len = USB_pDescr[0]; // descriptor length
break;
#ifdef USB_REPORT_DESCR
case USB_DESCR_TYP_REPORT:
if(USB_SetupBuf->wValueL == 0) {
USB_pDescr = USB_REPORT_DESCR;
len = USB_REPORT_DESCR_LEN;
}
else len = 0xff;
break;
#endif
default:
len = 0xff; // unsupported descriptors or error
break;
}
if(len != 0xff) {
if(USB_SetupLen > len) USB_SetupLen = len; // limit length
len = USB_SetupLen >= EP0_SIZE ? EP0_SIZE : USB_SetupLen;
USB_EP0_copyDescr(len); // copy descriptor to EP0
}
break;
case USB_SET_ADDRESS:
USB_Addr = USB_SetupBuf->wValueL; // save the assigned address
break;
case USB_GET_CONFIGURATION:
EP0_buffer[0] = USB_Config;
if(USB_SetupLen > 1) USB_SetupLen = 1;
len = USB_SetupLen;
break;
case USB_SET_CONFIGURATION:
USB_Config = USB_SetupBuf->wValueL;
USB_ENUM_OK = 1;
break;
case USB_GET_INTERFACE:
break;
case USB_SET_INTERFACE:
break;
case USB_GET_STATUS:
EP0_buffer[0] = 0x00;
EP0_buffer[1] = 0x00;
if(USB_SetupLen > 2) USB_SetupLen = 2;
len = USB_SetupLen;
break;
case USB_CLEAR_FEATURE:
if((USB_SetupTyp & USB_REQ_RECIP_MASK) == USB_REQ_RECIP_DEVICE) {
if(USB_SetupBuf->wValueL == 0x01) {
if(((uint8_t*)&CfgDescr)[7] & 0x20) {
// wake up
}
else len = 0xff; // failed
}
else len = 0xff; // failed
}
else if((USB_SetupTyp & USB_REQ_RECIP_MASK) == USB_REQ_RECIP_ENDP) {
switch(USB_SetupBuf->wIndexL) {
#ifdef EP1_OUT_callback
case 0x01:
UEP1_CTRL = (UEP1_CTRL & ~(bUEP_R_TOG | MASK_UEP_R_RES)) | UEP_R_RES_ACK;
break;
#endif
#ifdef EP1_IN_callback
case 0x81:
UEP1_CTRL = (UEP1_CTRL & ~(bUEP_T_TOG | MASK_UEP_T_RES)) | UEP_T_RES_NAK;
break;
#endif
#ifdef EP2_OUT_callback
case 0x02:
UEP2_CTRL = (UEP2_CTRL & ~(bUEP_R_TOG | MASK_UEP_R_RES)) | UEP_R_RES_ACK;
break;
#endif
#ifdef EP2_IN_callback
case 0x82:
UEP2_CTRL = (UEP2_CTRL & ~(bUEP_T_TOG | MASK_UEP_T_RES)) | UEP_T_RES_NAK;
break;
#endif
#ifdef EP3_OUT_callback
case 0x03:
UEP3_CTRL = (UEP3_CTRL & ~(bUEP_R_TOG | MASK_UEP_R_RES)) | UEP_R_RES_ACK;
break;
#endif
#ifdef EP3_IN_callback
case 0x83:
UEP3_CTRL = (UEP3_CTRL & ~(bUEP_T_TOG | MASK_UEP_T_RES)) | UEP_T_RES_NAK;
break;
#endif
#ifdef EP4_OUT_callback
case 0x04:
UEP4_CTRL = (UEP4_CTRL & ~(bUEP_R_TOG | MASK_UEP_R_RES)) | UEP_R_RES_ACK;
break;
#endif
#ifdef EP4_IN_callback
case 0x84:
UEP4_CTRL = (UEP4_CTRL & ~(bUEP_T_TOG | MASK_UEP_T_RES)) | UEP_T_RES_NAK;
break;
#endif
default:
len = 0xff; // unsupported endpoint
break;
}
}
else len = 0xff; // unsupported for non-endpoint
break;
case USB_SET_FEATURE:
if((USB_SetupTyp & USB_REQ_RECIP_MASK) == USB_REQ_RECIP_DEVICE) {
if(USB_SetupBuf->wValueL == 0x01) {
if( !(((uint8_t*)&CfgDescr)[7] & 0x20) ) len = 0xff; // failed
}
else len = 0xff; // failed
}
else if((USB_SetupTyp & USB_REQ_RECIP_MASK) == USB_REQ_RECIP_ENDP) {
if(USB_SetupBuf->wValueL == 0x00) {
switch(USB_SetupBuf->wIndexL) {
#ifdef EP1_OUT_callback
case 0x01:
UEP1_CTRL = (UEP1_CTRL & ~bUEP_R_TOG) | UEP_R_RES_STALL;
break;
#endif
#ifdef EP1_IN_callback
case 0x81:
UEP1_CTRL = (UEP1_CTRL & ~bUEP_T_TOG) | UEP_T_RES_STALL;
break;
#endif
#ifdef EP2_OUT_callback
case 0x02:
UEP2_CTRL = (UEP2_CTRL & ~bUEP_R_TOG) | UEP_R_RES_STALL;
break;
#endif
#ifdef EP2_IN_callback
case 0x82:
UEP2_CTRL = (UEP2_CTRL & ~bUEP_T_TOG) | UEP_T_RES_STALL;
break;
#endif
#ifdef EP3_OUT_callback
case 0x03:
UEP3_CTRL = (UEP3_CTRL & ~bUEP_R_TOG) | UEP_R_RES_STALL;
break;
#endif
#ifdef EP3_IN_callback
case 0x83:
UEP3_CTRL = (UEP3_CTRL & ~bUEP_T_TOG) | UEP_T_RES_STALL;
break;
#endif
#ifdef EP4_OUT_callback
case 0x04:
UEP4_CTRL = (UEP4_CTRL & ~bUEP_R_TOG) | UEP_R_RES_STALL;
break;
#endif
#ifdef EP4_IN_callback
case 0x84:
UEP4_CTRL = (UEP4_CTRL & ~bUEP_T_TOG) | UEP_T_RES_STALL;
break;
#endif
default:
len = 0xff; // failed
break;
}
}
else len = 0xff; // failed
}
else len = 0xff; // failed
break;
default:
len = 0xff; // failed
break;
}
}
#ifdef USB_CLASS_SETUP_handler
else if((USB_SetupTyp & USB_REQ_TYP_MASK) == USB_REQ_TYP_CLASS) {
len = USB_CLASS_SETUP_handler();
}
#endif
#ifdef USB_VENDOR_SETUP_handler
else if((USB_SetupTyp & USB_REQ_TYP_MASK) == USB_REQ_TYP_VENDOR) {
len = USB_VENDOR_SETUP_handler();
}
#endif
else len = 0xff;
if(len == 0xff) { // stall
USB_SetupReq = 0xff;
UEP0_CTRL = bUEP_R_TOG | bUEP_T_TOG | UEP_R_RES_STALL | UEP_T_RES_STALL; // STALL
}
else { // transmit data to host or send 0-length packet
USB_SetupLen -= len;
UEP0_T_LEN = len;
UEP0_CTRL = bUEP_R_TOG | bUEP_T_TOG | UEP_R_RES_ACK | UEP_T_RES_ACK;
}
}
// Endpoint 0 IN handler
void USB_EP0_IN(void) {
uint8_t len;
#ifdef USB_CLASS_IN_handler
if((USB_SetupTyp & USB_REQ_TYP_MASK) == USB_REQ_TYP_CLASS) {
USB_CLASS_IN_handler();
return;
}
#endif
#ifdef USB_VENDOR_IN_handler
if((USB_SetupTyp & USB_REQ_TYP_MASK) == USB_REQ_TYP_VENDOR) {
USB_VENDOR_IN_handler();
return;
}
#endif
switch(USB_SetupReq) {
case USB_GET_DESCRIPTOR:
len = USB_SetupLen >= EP0_SIZE ? EP0_SIZE : USB_SetupLen;
USB_EP0_copyDescr(len); // copy descriptor to EP0
USB_SetupLen -= len;
UEP0_T_LEN = len;
UEP0_CTRL ^= bUEP_T_TOG; // switch between DATA0 and DATA1
break;
case USB_SET_ADDRESS:
USB_DEV_AD = USB_DEV_AD & bUDA_GP_BIT | USB_Addr;
UEP0_CTRL = bUEP_R_TOG | UEP_T_RES_NAK | UEP_R_RES_ACK;
break;
default:
UEP0_CTRL = bUEP_R_TOG | UEP_T_RES_NAK | UEP_R_RES_ACK;
break;
}
}
// Endpoint 0 OUT handler
void USB_EP0_OUT(void) {
#ifdef USB_CLASS_OUT_handler
if((USB_SetupTyp & USB_REQ_TYP_MASK) == USB_REQ_TYP_CLASS) {
USB_CLASS_OUT_handler();
return;
}
#endif
#ifdef USB_VENDOR_OUT_handler
if((USB_SetupTyp & USB_REQ_TYP_MASK) == USB_REQ_TYP_VENDOR) {
USB_VENDOR_OUT_handler();
return;
}
#endif
UEP0_CTRL = bUEP_T_TOG | UEP_T_RES_ACK | UEP_R_RES_ACK;
}
// ===================================================================================
// USB Interrupt Service Routine
// ===================================================================================
#pragma save
#pragma nooverlay
void USB_interrupt(void) {
// USB transfer completed interrupt
if(UIF_TRANSFER) {
// Dispatch to service functions
uint8_t callIndex = USB_INT_ST & MASK_UIS_ENDP;
switch (USB_INT_ST & MASK_UIS_TOKEN) {
case UIS_TOKEN_SETUP:
EP0_SETUP_callback();
break;
case UIS_TOKEN_IN:
switch (callIndex) {
case 0: EP0_IN_callback(); break;
#ifdef EP1_IN_callback
case 1: EP1_IN_callback(); break;
#endif
#ifdef EP2_IN_callback
case 2: EP2_IN_callback(); break;
#endif
#ifdef EP3_IN_callback
case 3: EP3_IN_callback(); break;
#endif
#ifdef EP4_IN_callback
case 4: EP4_IN_callback(); break;
#endif
default: break;
}
break;
case UIS_TOKEN_OUT:
switch (callIndex) {
case 0: EP0_OUT_callback(); break;
#ifdef EP1_OUT_callback
case 1: EP1_OUT_callback(); break;
#endif
#ifdef EP2_OUT_callback
case 2: EP2_OUT_callback(); break;
#endif
#ifdef EP3_OUT_callback
case 3: EP3_OUT_callback(); break;
#endif
#ifdef EP4_OUT_callback
case 4: EP4_OUT_callback(); break;
#endif
default: break;
}
break;
}
UIF_TRANSFER = 0; // clear interrupt flag
}
// USB bus suspend or wakeup event interrupt
if(UIF_SUSPEND) {
UIF_SUSPEND = 0; // clear interrupt flag
#ifdef USB_SUSPEND_handler
if(USB_MIS_ST & bUMS_SUSPEND) {
SAFE_MOD = 0x55;
SAFE_MOD = 0xAA;
WAKE_CTRL |= bWAK_BY_USB; // enable wakeup by USB
USB_SUSPEND_handler(); // custom suspend handler (PCON |= PD;)
SAFE_MOD = 0x55;
SAFE_MOD = 0xAA;
WAKE_CTRL &= ~bWAK_BY_USB; // disable wakeup by USB
}
#endif
}
// USB bus reset event interrupt
if(UIF_BUS_RST) {
#ifdef USB_RESET_handler
USB_RESET_handler(); // custom reset handler
#endif
USB_EP_init(); // reset endpoints
USB_DEV_AD = 0x00; // reset device address
USB_INT_FG = 0x1f; // clear all interrupt flags
}
}
#pragma restore
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