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metastable fix: wip

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Trying to figure out what's causing this problem.

Signed-off-by: Sean Cross <sean@xobs.io>
This commit is contained in:
Sean Cross 2019-03-05 20:28:54 +08:00
parent c0842737bf
commit 3df59a866d
10 changed files with 477 additions and 597 deletions
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48
hw/crc5-test.c
View File

@ -100,14 +100,17 @@ static uint16_t make_token(uint16_t data) {
return (reverse_byte(val >> 8) << 8) | reverse_byte(val); return (reverse_byte(val >> 8) << 8) | reverse_byte(val);
} }
int do_crc5(uint16_t pkt) { int do_crc5(uint8_t bfr[2]) {
uint8_t pkt_flipped[2] = { uint8_t pkt_flipped[2] = {
reverse_byte(pkt >> 8), reverse_byte(bfr[0]),
reverse_byte(pkt), reverse_byte(bfr[1]),
}; };
uint32_t data = (pkt_flipped[1] >> 5) | (pkt_flipped[0] << 3); uint32_t data = (pkt_flipped[1] >> 5) | (pkt_flipped[0] << 3);
uint32_t data_flipped; uint32_t data_flipped;
uint8_t crc; uint8_t crc;
uint16_t pkt;
((uint8_t *)&pkt)[0] = bfr[1];
((uint8_t *)&pkt)[1] = bfr[0];
uint8_t found_crc = (pkt >> 3) & 0x1f; uint8_t found_crc = (pkt >> 3) & 0x1f;
data_flipped = reverse_sof(data); data_flipped = reverse_sof(data);
@ -131,24 +134,29 @@ int do_crc5(uint16_t pkt) {
#define ARRAY_SIZE(x) (sizeof(x) / sizeof(*x)) #define ARRAY_SIZE(x) (sizeof(x) / sizeof(*x))
int main(int argc, char **argv) int main(int argc, char **argv)
{ {
uint32_t check_bytes[] = { // uint32_t check_bytes[] = {
/* // /*
0xff3c, // 0xff3c,
0x12c5, // 0x12c5,
0xe17e, // 0xe17e,
0x19f5, // 0x19f5,
0x0225, // 0x0225,
0x0165, // 0x0165,
0x009d, // 0x009d,
0x102f, // 0x102f,
make_token(1013), // make_token(1013),
make_token(1429), // make_token(1429),
make_token(100), // make_token(100),
*/ // */
0x82bc, // 0x82bc,
make_token(0x0483),//0x5fde, // make_token(0x0483),//0x5fde,
0x843c, // 0x843c,
// };
uint8_t check_bytes[][2] = {
{0x82, 0xbc},
{0x83, 0x44},
{0x84, 0x3c},
}; };
unsigned int i; unsigned int i;

2
hw/deps/valentyusb

@ -1 +1 @@
Subproject commit ac9a522847a116c842c8f7f795e587ff3d0d0dbb Subproject commit f47066124207b43d38cb0e6bffacedd8fb0f523e

75
hw/foboot-bitstream.py
View File

@ -42,6 +42,18 @@ _io = [
Subsignal("pullup", Pins("35")), Subsignal("pullup", Pins("35")),
IOStandard("LVCMOS33") IOStandard("LVCMOS33")
), ),
("pmoda", 0,
Subsignal("p1", Pins("28"), IOStandard("LVCMOS33")),
Subsignal("p2", Pins("27"), IOStandard("LVCMOS33")),
Subsignal("p3", Pins("26"), IOStandard("LVCMOS33")),
Subsignal("p4", Pins("23"), IOStandard("LVCMOS33")),
),
("pmodb", 0,
Subsignal("p1", Pins("48"), IOStandard("LVCMOS33")),
Subsignal("p2", Pins("47"), IOStandard("LVCMOS33")),
Subsignal("p3", Pins("46"), IOStandard("LVCMOS33")),
Subsignal("p4", Pins("45"), IOStandard("LVCMOS33")),
),
("spiflash", 0, ("spiflash", 0,
Subsignal("cs_n", Pins("16"), IOStandard("LVCMOS33")), Subsignal("cs_n", Pins("16"), IOStandard("LVCMOS33")),
Subsignal("clk", Pins("15"), IOStandard("LVCMOS33")), Subsignal("clk", Pins("15"), IOStandard("LVCMOS33")),
@ -62,7 +74,14 @@ _connectors = []
class _CRG(Module): class _CRG(Module):
def __init__(self, platform): def __init__(self, platform):
clk48_raw = platform.request("clk48")
clk48 = Signal()
clk12 = Signal() clk12 = Signal()
# Divide clk48 down to clk12, to ensure they're synchronized.
# By doing this, we avoid needing clock-domain crossing.
clk12_counter = Signal(2)
# # "0b00" Sets 48MHz HFOSC output # # "0b00" Sets 48MHz HFOSC output
# # "0b01" Sets 24MHz HFOSC output. # # "0b01" Sets 24MHz HFOSC output.
# # "0b10" Sets 12MHz HFOSC output. # # "0b10" Sets 12MHz HFOSC output.
@ -77,10 +96,14 @@ class _CRG(Module):
self.clock_domains.cd_sys = ClockDomain() self.clock_domains.cd_sys = ClockDomain()
self.clock_domains.cd_usb_12 = ClockDomain() self.clock_domains.cd_usb_12 = ClockDomain()
self.clock_domains.cd_usb_48 = ClockDomain()
platform.add_period_constraint(self.cd_usb_48.clk, 1e9/48e6)
platform.add_period_constraint(self.cd_sys.clk, 1e9/12e6)
platform.add_period_constraint(self.cd_usb_12.clk, 1e9/12e6)
self.reset = Signal() self.reset = Signal()
# FIXME: Use PLL, increase system clock to 32 MHz, pending nextpnr
# fixes.
self.comb += self.cd_sys.clk.eq(clk12) self.comb += self.cd_sys.clk.eq(clk12)
self.comb += self.cd_usb_12.clk.eq(clk12) self.comb += self.cd_usb_12.clk.eq(clk12)
@ -94,16 +117,25 @@ class _CRG(Module):
self.cd_usb_12.rst.eq(reset_delay != 0) self.cd_usb_12.rst.eq(reset_delay != 0)
] ]
# Divide clk48 down to clk12, to ensure they're synchronized. # self.specials += Instance(
clk12_counter = Signal(2) # "SB_GB",
# i_USER_SIGNAL_TO_GLOBAL_BUFFER=clk12_counter[1],
# o_GLOBAL_BUFFER_OUTPUT=clk12,
# )
self.specials += Instance(
"SB_GB",
i_USER_SIGNAL_TO_GLOBAL_BUFFER=clk48_raw,
o_GLOBAL_BUFFER_OUTPUT=clk48,
)
self.comb += [
self.cd_usb_48.clk.eq(clk48),
]
self.sync.usb_48 += [ self.sync.usb_48 += [
clk12_counter.eq(clk12_counter + 1), clk12_counter.eq(clk12_counter + 1),
] ]
self.specials += Instance( self.comb += clk12.eq(clk12_counter[1])
"SB_GB",
i_USER_SIGNAL_TO_GLOBAL_BUFFER=clk12_counter[1],
o_GLOBAL_BUFFER_OUTPUT=clk12,
)
self.sync.por += \ self.sync.por += \
If(reset_delay != 0, If(reset_delay != 0,
@ -111,12 +143,6 @@ class _CRG(Module):
) )
self.specials += AsyncResetSynchronizer(self.cd_por, self.reset) self.specials += AsyncResetSynchronizer(self.cd_por, self.reset)
self.clock_domains.cd_usb_48 = ClockDomain()
platform.add_period_constraint(self.cd_usb_48.clk, 1e9/48e6)
self.comb += [
self.cd_usb_48.clk.eq(platform.request("clk48")),
]
class RandomFirmwareROM(wishbone.SRAM): class RandomFirmwareROM(wishbone.SRAM):
""" """
Seed the random data with a fixed number, so different bitstreams Seed the random data with a fixed number, so different bitstreams
@ -183,8 +209,6 @@ class BaseSoC(SoCCore):
clk_freq = int(12e6) clk_freq = int(12e6)
self.submodules.crg = _CRG(platform) self.submodules.crg = _CRG(platform)
platform.add_period_constraint(self.crg.cd_sys.clk, 1e9/clk_freq)
platform.add_period_constraint(self.crg.cd_usb_12.clk, 1e9/clk_freq)
SoCCore.__init__(self, platform, clk_freq, integrated_sram_size=0, **kwargs) SoCCore.__init__(self, platform, clk_freq, integrated_sram_size=0, **kwargs)
@ -218,12 +242,23 @@ class BaseSoC(SoCCore):
else: else:
raise ValueError("unrecognized boot_source: {}".format(boot_source)) raise ValueError("unrecognized boot_source: {}".format(boot_source))
pmoda = platform.request("pmoda")
pmodb = platform.request("pmodb")
# Add USB pads # Add USB pads
usb_pads = platform.request("usb") usb_pads = platform.request("usb")
usb_iobuf = usbio.IoBuf(usb_pads.d_p, usb_pads.d_n, usb_pads.pullup) usb_iobuf = usbio.IoBuf(pmoda.p4, pmodb.p4, usb_pads.pullup)
self.submodules.usb = epfifo.PerEndpointFifoInterface(usb_iobuf, endpoints=[EndpointType.BIDIR]) # self.submodules.usb = epfifo.PerEndpointFifoInterface(usb_iobuf, endpoints=[EndpointType.BIDIR])
# self.submodules.usb = epmem.MemInterface(usb_iobuf) # self.submodules.usb = epmem.MemInterface(usb_iobuf)
# self.submodules.usb = unififo.UsbUniFifo(usb_iobuf) self.submodules.usb = unififo.UsbUniFifo(usb_iobuf)
self.comb += [
pmoda.p1.eq(self.crg.cd_usb_48.clk),
pmodb.p1.eq(self.crg.cd_usb_12.clk),
pmodb.p2.eq(self.usb.tx.i_bit_strobe),
pmoda.p2.eq(self.usb.tx.fit_dat),
pmodb.p3.eq(self.usb.tx.fit_oe),
]
# Disable final deep-sleep power down so firmware words are loaded # Disable final deep-sleep power down so firmware words are loaded
# onto softcore's address bus. # onto softcore's address bus.

142
sw/include/generated/csr.h
View File

@ -224,147 +224,87 @@ static inline void uart_phy_tuning_word_write(unsigned int value) {
/* usb */ /* usb */
#define CSR_USB_BASE 0xe0004800 #define CSR_USB_BASE 0xe0004800
#define CSR_USB_PULLUP_OUT_ADDR 0xe0004800 #define CSR_USB_BYTE_COUNT_ADDR 0xe0004800
#define CSR_USB_PULLUP_OUT_SIZE 1 #define CSR_USB_BYTE_COUNT_SIZE 1
static inline unsigned char usb_pullup_out_read(void) { static inline unsigned char usb_byte_count_read(void) {
unsigned char r = csr_readl(0xe0004800); unsigned char r = csr_readl(0xe0004800);
return r; return r;
} }
static inline void usb_pullup_out_write(unsigned char value) { #define CSR_USB_OBUF_HEAD_ADDR 0xe0004804
csr_writel(value, 0xe0004800); #define CSR_USB_OBUF_HEAD_SIZE 1
} static inline unsigned char usb_obuf_head_read(void) {
#define CSR_USB_EP_0_OUT_EV_STATUS_ADDR 0xe0004804
#define CSR_USB_EP_0_OUT_EV_STATUS_SIZE 1
static inline unsigned char usb_ep_0_out_ev_status_read(void) {
unsigned char r = csr_readl(0xe0004804); unsigned char r = csr_readl(0xe0004804);
return r; return r;
} }
static inline void usb_ep_0_out_ev_status_write(unsigned char value) { static inline void usb_obuf_head_write(unsigned char value) {
csr_writel(value, 0xe0004804); csr_writel(value, 0xe0004804);
} }
#define CSR_USB_EP_0_OUT_EV_PENDING_ADDR 0xe0004808 #define CSR_USB_OBUF_EMPTY_ADDR 0xe0004808
#define CSR_USB_EP_0_OUT_EV_PENDING_SIZE 1 #define CSR_USB_OBUF_EMPTY_SIZE 1
static inline unsigned char usb_ep_0_out_ev_pending_read(void) { static inline unsigned char usb_obuf_empty_read(void) {
unsigned char r = csr_readl(0xe0004808); unsigned char r = csr_readl(0xe0004808);
return r; return r;
} }
static inline void usb_ep_0_out_ev_pending_write(unsigned char value) { #define CSR_USB_ARM_ADDR 0xe000480c
csr_writel(value, 0xe0004808); #define CSR_USB_ARM_SIZE 1
} static inline unsigned char usb_arm_read(void) {
#define CSR_USB_EP_0_OUT_EV_ENABLE_ADDR 0xe000480c
#define CSR_USB_EP_0_OUT_EV_ENABLE_SIZE 1
static inline unsigned char usb_ep_0_out_ev_enable_read(void) {
unsigned char r = csr_readl(0xe000480c); unsigned char r = csr_readl(0xe000480c);
return r; return r;
} }
static inline void usb_ep_0_out_ev_enable_write(unsigned char value) { static inline void usb_arm_write(unsigned char value) {
csr_writel(value, 0xe000480c); csr_writel(value, 0xe000480c);
} }
#define CSR_USB_EP_0_OUT_LAST_TOK_ADDR 0xe0004810 #define CSR_USB_IBUF_HEAD_ADDR 0xe0004810
#define CSR_USB_EP_0_OUT_LAST_TOK_SIZE 1 #define CSR_USB_IBUF_HEAD_SIZE 1
static inline unsigned char usb_ep_0_out_last_tok_read(void) { static inline unsigned char usb_ibuf_head_read(void) {
unsigned char r = csr_readl(0xe0004810); unsigned char r = csr_readl(0xe0004810);
return r; return r;
} }
#define CSR_USB_EP_0_OUT_RESPOND_ADDR 0xe0004814 static inline void usb_ibuf_head_write(unsigned char value) {
#define CSR_USB_EP_0_OUT_RESPOND_SIZE 1 csr_writel(value, 0xe0004810);
static inline unsigned char usb_ep_0_out_respond_read(void) { }
#define CSR_USB_IBUF_EMPTY_ADDR 0xe0004814
#define CSR_USB_IBUF_EMPTY_SIZE 1
static inline unsigned char usb_ibuf_empty_read(void) {
unsigned char r = csr_readl(0xe0004814); unsigned char r = csr_readl(0xe0004814);
return r; return r;
} }
static inline void usb_ep_0_out_respond_write(unsigned char value) { #define CSR_USB_PULLUP_OUT_ADDR 0xe0004818
csr_writel(value, 0xe0004814); #define CSR_USB_PULLUP_OUT_SIZE 1
} static inline unsigned char usb_pullup_out_read(void) {
#define CSR_USB_EP_0_OUT_DTB_ADDR 0xe0004818
#define CSR_USB_EP_0_OUT_DTB_SIZE 1
static inline unsigned char usb_ep_0_out_dtb_read(void) {
unsigned char r = csr_readl(0xe0004818); unsigned char r = csr_readl(0xe0004818);
return r; return r;
} }
static inline void usb_ep_0_out_dtb_write(unsigned char value) { static inline void usb_pullup_out_write(unsigned char value) {
csr_writel(value, 0xe0004818); csr_writel(value, 0xe0004818);
} }
#define CSR_USB_EP_0_OUT_OBUF_HEAD_ADDR 0xe000481c #define CSR_USB_EV_STATUS_ADDR 0xe000481c
#define CSR_USB_EP_0_OUT_OBUF_HEAD_SIZE 1 #define CSR_USB_EV_STATUS_SIZE 1
static inline unsigned char usb_ep_0_out_obuf_head_read(void) { static inline unsigned char usb_ev_status_read(void) {
unsigned char r = csr_readl(0xe000481c); unsigned char r = csr_readl(0xe000481c);
return r; return r;
} }
static inline void usb_ep_0_out_obuf_head_write(unsigned char value) { static inline void usb_ev_status_write(unsigned char value) {
csr_writel(value, 0xe000481c); csr_writel(value, 0xe000481c);
} }
#define CSR_USB_EP_0_OUT_OBUF_EMPTY_ADDR 0xe0004820 #define CSR_USB_EV_PENDING_ADDR 0xe0004820
#define CSR_USB_EP_0_OUT_OBUF_EMPTY_SIZE 1 #define CSR_USB_EV_PENDING_SIZE 1
static inline unsigned char usb_ep_0_out_obuf_empty_read(void) { static inline unsigned char usb_ev_pending_read(void) {
unsigned char r = csr_readl(0xe0004820); unsigned char r = csr_readl(0xe0004820);
return r; return r;
} }
#define CSR_USB_EP_0_IN_EV_STATUS_ADDR 0xe0004824 static inline void usb_ev_pending_write(unsigned char value) {
#define CSR_USB_EP_0_IN_EV_STATUS_SIZE 1 csr_writel(value, 0xe0004820);
static inline unsigned char usb_ep_0_in_ev_status_read(void) { }
#define CSR_USB_EV_ENABLE_ADDR 0xe0004824
#define CSR_USB_EV_ENABLE_SIZE 1
static inline unsigned char usb_ev_enable_read(void) {
unsigned char r = csr_readl(0xe0004824); unsigned char r = csr_readl(0xe0004824);
return r; return r;
} }
static inline void usb_ep_0_in_ev_status_write(unsigned char value) { static inline void usb_ev_enable_write(unsigned char value) {
csr_writel(value, 0xe0004824); csr_writel(value, 0xe0004824);
} }
#define CSR_USB_EP_0_IN_EV_PENDING_ADDR 0xe0004828
#define CSR_USB_EP_0_IN_EV_PENDING_SIZE 1
static inline unsigned char usb_ep_0_in_ev_pending_read(void) {
unsigned char r = csr_readl(0xe0004828);
return r;
}
static inline void usb_ep_0_in_ev_pending_write(unsigned char value) {
csr_writel(value, 0xe0004828);
}
#define CSR_USB_EP_0_IN_EV_ENABLE_ADDR 0xe000482c
#define CSR_USB_EP_0_IN_EV_ENABLE_SIZE 1
static inline unsigned char usb_ep_0_in_ev_enable_read(void) {
unsigned char r = csr_readl(0xe000482c);
return r;
}
static inline void usb_ep_0_in_ev_enable_write(unsigned char value) {
csr_writel(value, 0xe000482c);
}
#define CSR_USB_EP_0_IN_LAST_TOK_ADDR 0xe0004830
#define CSR_USB_EP_0_IN_LAST_TOK_SIZE 1
static inline unsigned char usb_ep_0_in_last_tok_read(void) {
unsigned char r = csr_readl(0xe0004830);
return r;
}
#define CSR_USB_EP_0_IN_RESPOND_ADDR 0xe0004834
#define CSR_USB_EP_0_IN_RESPOND_SIZE 1
static inline unsigned char usb_ep_0_in_respond_read(void) {
unsigned char r = csr_readl(0xe0004834);
return r;
}
static inline void usb_ep_0_in_respond_write(unsigned char value) {
csr_writel(value, 0xe0004834);
}
#define CSR_USB_EP_0_IN_DTB_ADDR 0xe0004838
#define CSR_USB_EP_0_IN_DTB_SIZE 1
static inline unsigned char usb_ep_0_in_dtb_read(void) {
unsigned char r = csr_readl(0xe0004838);
return r;
}
static inline void usb_ep_0_in_dtb_write(unsigned char value) {
csr_writel(value, 0xe0004838);
}
#define CSR_USB_EP_0_IN_IBUF_HEAD_ADDR 0xe000483c
#define CSR_USB_EP_0_IN_IBUF_HEAD_SIZE 1
static inline unsigned char usb_ep_0_in_ibuf_head_read(void) {
unsigned char r = csr_readl(0xe000483c);
return r;
}
static inline void usb_ep_0_in_ibuf_head_write(unsigned char value) {
csr_writel(value, 0xe000483c);
}
#define CSR_USB_EP_0_IN_IBUF_EMPTY_ADDR 0xe0004840
#define CSR_USB_EP_0_IN_IBUF_EMPTY_SIZE 1
static inline unsigned char usb_ep_0_in_ibuf_empty_read(void) {
unsigned char r = csr_readl(0xe0004840);
return r;
}
/* constants */ /* constants */
#define NMI_INTERRUPT 0 #define NMI_INTERRUPT 0

9
sw/src/main.c
View File

@ -73,6 +73,7 @@ int main(int argc, char **argv)
printf("USB enabled, waiting for packet...\n"); printf("USB enabled, waiting for packet...\n");
// usb_print_status(); // usb_print_status();
int last = 0; int last = 0;
static uint8_t bfr[12];
while (1) while (1)
{ {
if (usb_irq_happened() != last) { if (usb_irq_happened() != last) {
@ -80,6 +81,14 @@ int main(int argc, char **argv)
printf("USB %d IRQ happened\n", last); printf("USB %d IRQ happened\n", last);
} }
usb_poll(); usb_poll();
printf("Press any key to send... ");
uart_read();
printf("Sending... ");
bfr[0] = ~0;
bfr[1] = 0;
bfr[2] = 0;
usb_send(NULL, 0, bfr, 3);
printf("Sent\n");
} }
return 0; return 0;
} }

116
sw/src/usb-rawfifo.c
View File

@ -1,116 +0,0 @@
#include <usb.h>
#include <irq.h>
#include <generated/csr.h>
#include <string.h>
#include <printf.h>
#include <uart.h>
#ifdef CSR_USB_OBUF_EMPTY_ADDR
static inline unsigned char usb_obuf_head_read(void);
static inline void usb_obuf_head_write(unsigned char value);
static inline unsigned char usb_obuf_empty_read(void);
static inline unsigned char usb_arm_read(void);
static inline void usb_arm_write(unsigned char value);
static inline unsigned char usb_ibuf_head_read(void);
static inline void usb_ibuf_head_write(unsigned char value);
static inline unsigned char usb_ibuf_empty_read(void);
static inline unsigned char usb_pullup_out_read(void);
static inline void usb_pullup_out_write(unsigned char value);
static inline unsigned char usb_ev_status_read(void);
static inline void usb_ev_status_write(unsigned char value);
static inline unsigned char usb_ev_pending_read(void);
static inline void usb_ev_pending_write(unsigned char value);
static inline unsigned char usb_ev_enable_read(void);
static inline void usb_ev_enable_write(unsigned char value);
static const char hex[] = "0123456789abcdef";
uint8_t usb_ep0out_wr_ptr;
uint8_t usb_ep0out_rd_ptr;
#define EP0OUT_BUFFERS 64
static uint8_t usb_ep0out_buffer[EP0OUT_BUFFERS][128];
void usb_print_status(void)
{
static int loops;
loops++;
while (usb_ep0out_rd_ptr != usb_ep0out_wr_ptr) {
uint8_t *obuf = usb_ep0out_buffer[usb_ep0out_rd_ptr];
uint8_t cnt = obuf[0];
unsigned int i;
if (cnt) {
for (i = 0; i < cnt; i++) {
uart_write(' ');
uart_write(hex[(obuf[i+1] >> 4) & 0xf]);
uart_write(hex[obuf[i+1] & (0xf)]);
// printf(" %02x", obufbuf[i]);
}
uart_write('\r');
uart_write('\n');
}
// printf("\n");
usb_ep0out_rd_ptr = (usb_ep0out_rd_ptr + 1) & (EP0OUT_BUFFERS-1);
}
// if (!obe) {
// uint32_t obh = usb_obuf_head_read();
// usb_obuf_head_write(1);
// if (i < 300)
// printf("i: %8d obe: %d obh: %02x\n", i, obe, obh);
// }
}
int irq_happened;
void usb_init(void) {
return;
}
void usb_isr(void) {
uint8_t pending = usb_ev_pending_read();
// Advance the obuf head, which will reset the obuf_empty bit
if (pending & 1) {
int byte_count = 0;
uint8_t *obuf = usb_ep0out_buffer[usb_ep0out_wr_ptr];
while (1) {
if (usb_obuf_empty_read())
break;
obuf[++byte_count] = usb_obuf_head_read();
usb_obuf_head_write(0);
}
usb_ev_pending_write(1);
obuf[0] = byte_count;
usb_ep0out_wr_ptr = (usb_ep0out_wr_ptr + 1) & (EP0OUT_BUFFERS-1);
}
return;
}
void usb_connect(void) {
usb_pullup_out_write(1);
usb_ev_pending_write(usb_ev_pending_read());
usb_ev_enable_write(0xff);
irq_setmask(irq_getmask() | (1 << USB_INTERRUPT));
}
void usb_wait(void) {
while (!irq_happened)
;
}
int usb_irq_happened(void) {
return irq_happened;
}
#endif /* CSR_USB_OBUF_EMPTY_ADDR */

6
sw/src/usb-unififo.c
View File

@ -178,10 +178,14 @@ void usb_init(void) {
int usb_send(struct usb_device *dev, int epnum, const void *data, int total_count) { int usb_send(struct usb_device *dev, int epnum, const void *data, int total_count) {
unsigned int i; unsigned int i;
const uint8_t *data_bfr = data; const uint8_t *data_bfr = data;
while (!usb_ibuf_empty_read())
printf(".");
usb_arm_write(0);
for (i = 0; i < total_count; i++) { for (i = 0; i < total_count; i++) {
printf("Writing %02x ", data_bfr[i]);
usb_ibuf_head_write(data_bfr[i]); usb_ibuf_head_write(data_bfr[i]);
} }
usb_arm_write(0); usb_arm_write(1);
} }
void usb_isr(void) { void usb_isr(void) {