I've been trying to program a CH552 chip using assembly, however, I've ran into a bit of a problem when trying to implement USB. My device replies to the first GET_DESCRIPTOR (device) fine, as shown by the usbmon log, but the chip is not replying to requests on the new address. Here are the relevant usbmon logs (using grep "80 06" -A1):
ffffa0bf9a27f8c0 416853100 S Ci:1:000:0 s 80 06 0100 0000 0040 64 <
ffffa0bf9a27f8c0 416853225 C Ci:1:000:0 0 18 = 12010002 ffffff40 34127856 01000102 0301
--
ffffa0bf9a27f8c0 416979126 S Ci:1:073:0 s 80 06 0100 0000 0012 18 <
ffffa0bf9a27f8c0 416979360 C Ci:1:073:0 -71 0
ffffa0bf9a27f8c0 416979386 S Ci:1:073:0 s 80 06 0100 0000 0012 18 <
ffffa0bf9a27f8c0 416979618 C Ci:1:073:0 -71 0
ffffa0bf9a27f8c0 416979645 S Ci:1:073:0 s 80 06 0100 0000 0012 18 <
ffffa0bf9a27f8c0 416979813 C Ci:1:073:0 -71 0
--
ffffa0bf9a27f8c0 417094197 S Ci:1:000:0 s 80 06 0100 0000 0040 64 <
ffffa0bf9a27f8c0 417094349 C Ci:1:000:0 0 0
ffffa0bf9a27f8c0 417094372 S Ci:1:000:0 s 80 06 0100 0000 0040 64 <
ffffa0bf9a27f8c0 417094481 C Ci:1:000:0 0 18 = 80060001 00004000 dd947856 01000102 0301
ffffa0bf9a27f8c0 417094489 S Ci:1:000:0 s 80 06 0100 0000 0040 64 <
ffffa0bf9a27f8c0 417094648 C Ci:1:000:0 -71 0
--
ffffa0bf9a27f8c0 417313132 S Ci:1:000:0 s 80 06 0100 0000 0040 64 <
ffffa0bf9a27f8c0 417313357 C Ci:1:000:0 -71 0
ffffa0bf9a27f8c0 417313384 S Ci:1:000:0 s 80 06 0100 0000 0040 64 <
ffffa0bf9a27f8c0 417313581 C Ci:1:000:0 -71 0
ffffa0bf9a27f8c0 417313608 S Ci:1:000:0 s 80 06 0100 0000 0040 64 <
ffffa0bf9a27f8c0 417313777 C Ci:1:000:0 -71 0
Here is the relevant output from dmesg | tail:
[ 4512.616604] usb 1-2: new full-speed USB device number 73 using xhci_hcd
[ 4512.743379] usb 1-2: device descriptor read/all, error -71
[ 4512.857686] usb 1-2: new full-speed USB device number 74 using xhci_hcd
[ 4512.972745] usb 1-2: device descriptor read/64, error -71
[ 4513.190744] usb 1-2: device descriptor read/64, error -71
[ 4513.292877] usb usb1-port2: attempt power cycle
[ 4513.680700] usb 1-2: new full-speed USB device number 75 using xhci_hcd
[ 4513.680890] usb 1-2: Device not responding to setup address.
[ 4513.885901] usb 1-2: Device not responding to setup address.
[ 4514.092785] usb 1-2: device not accepting address 75, error -71
[ 4514.092896] usb 1-2: WARN: invalid context state for evaluate context command.
[ 4514.206755] usb 1-2: new full-speed USB device number 76 using xhci_hcd
[ 4514.206901] usb 1-2: Device not responding to setup address.
[ 4514.412865] usb 1-2: Device not responding to setup address.
[ 4514.620786] usb 1-2: device not accepting address 76, error -71
[ 4514.620908] usb 1-2: WARN: invalid context state for evaluate context command.
[ 4514.620990] usb usb1-port2: unable to enumerate USB device
And here is my code:
b0 EQU 00000001b
b1 EQU 00000010b
b2 EQU 00000100b
b3 EQU 00001000b
b4 EQU 00010000b
b5 EQU 00100000b
b6 EQU 01000000b
b7 EQU 10000000b
; GPIO
p1_mod_oc EQU 092h
p1_dir_pu EQU 093h
p3_mod_oc EQU 096h
p3_dir_pu EQU 097h
; SFRs
dp EQU 082h
; Interrupts
; ie
e_dis EQU b6
ie_ex EQU 0E8h
ie_usb BIT ie_ex.2
; Interrupt vectors
int_no_usb EQU 043h
; USB
usb_int_fg EQU 0D8h
uif_transfer BIT usb_int_fg.1
usb_int_st equ 0D9h
buis_token1 EQU b5
buis_token0 EQU b4
mask_uis_token EQU b5 OR b4
mask_uis_endp EQU b3 OR b2 OR b1 OR b0
usb_int_en EQU 0E1h
buie_transfer EQU b1
usb_ctrl EQU 0E2h
buc_sys_ctrl1 EQU b5
buc_sys_ctrl0 EQU b4
buc_dma_en EQU b0
usb_dev_ad EQU 0E3h
udev_ctrl EQU 0D1h
bud_port_en EQU b0
uep0_ctrl EQU 0DCh
buep_r_tog EQU b7
buep_t_tog EQU b6
buep_r_res1 EQU b3
buep_r_res0 EQU b2
buep_t_res1 EQU b1
buep_t_res0 EQU b0
uep0_t_len EQU 0DDh
uep0_dma_h EQU 0EDh
uep0_dma_l EQU 0ECh
uep0_dma EQU 0ECh
; Custom USB
; r0
buep0_stage EQU b0
; r5 used to store tx length
; ============== MACROS ==============
MOVW MACRO dest, src
MOV dest, src
MOV dest+1, src+1
ENDM
MOVSX MACRO src
MOV a, src
MOVX @dptr, a
INC dptr
ENDM
ADDBW MACRO dest, src
MOV a, src
ADD a, dest
MOV dest, a
JNC #2d
INC dest+1
ENDM
; ============== CODE ==============
vectors:
ORG 000h
LJMP start
ORG int_no_usb
LJMP usb_isr
start:
MOV p1_mod_oc, #00000000b
MOV p1_dir_pu, #11110011b
MOV p3_mod_oc, #00000000b
MOV p3_dir_pu, #00000011b
MOV r0, #0d
MOV p1, #00000000b
MOV p3, #00000000b
SETB ea
CLR e_dis
SETB ie_usb
ORL usb_int_en, #buie_transfer
MOV usb_ctrl, #(buc_sys_ctrl1 OR buc_dma_en)
MOV udev_ctrl, #bud_port_en
loop:
SJMP loop
usb_isr:
MOV a, usb_int_st
ANL a, #mask_uis_token
SWAP a
RL a
MOV dptr, #packet_type_jmptbl
JMP @a+dptr
packet_type_jmptbl:
AJMP packet_out
AJMP over
AJMP packet_in
AJMP packet_setup
packet_out:
MOV uep0_t_len, #0b
AJMP over
packet_in:
MOV a, r0
JZ old_address
MOV usb_dev_ad, a
MOV a, usb_dev_ad
old_address:
AJMP over
packet_setup:
MOVW dp, uep0_dma
INC dptr
MOVX a, @dptr
RL a
MOV dptr, #brequest_jmptbl
JMP @a+dptr
brequest_jmptbl:
AJMP over
AJMP over
AJMP over
AJMP over
AJMP over
AJMP brequest_set_address
AJMP brequest_get_descriptor
AJMP over
AJMP over
AJMP over
AJMP over
AJMP over
AJMP over
brequest_get_descriptor:
MOV a, #(NOT buep0_stage)
ANL a, r0
XCH a, r0
MOV uep0_ctrl, #11000000b
MOV uep0_t_len, #18d
MOVW dp, uep0_dma
MOVSX #18d
MOVSX #1d
MOVSX #000h
MOVSX #002h
MOVSX #0FFh
MOVSX #0FFh
MOVSX #0FFh
MOVSX #64d
MOVSX #034h
MOVSX #012h
MOVSX #078h
MOVSX #056h
MOVSX #001h
MOVSX #000h
MOVSX #1d
MOVSX #2d
MOVSX #3d
MOVSX #1d
AJMP over
brequest_set_address:
MOVW dp, uep0_dma
INC dptr
INC dptr
MOVX a, @dptr
MOV r0, a
MOV uep0_ctrl, #11000000b
MOV uep0_t_len, #0b
AJMP over
over:
CLR uif_transfer
RETI
END
Thanks!
