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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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9
sw/src/main.c
View File

@ -73,6 +73,7 @@ int main(int argc, char **argv)
printf("USB enabled, waiting for packet...\n");
// usb_print_status();
int last = 0;
static uint8_t bfr[12];
while (1)
{
if (usb_irq_happened() != last) {
@ -80,6 +81,14 @@ int main(int argc, char **argv)
printf("USB %d IRQ happened\n", last);
}
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;
}

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) {
unsigned int i;
const uint8_t *data_bfr = data;
while (!usb_ibuf_empty_read())
printf(".");
usb_arm_write(0);
for (i = 0; i < total_count; i++) {
printf("Writing %02x ", data_bfr[i]);
usb_ibuf_head_write(data_bfr[i]);
}
usb_arm_write(0);
usb_arm_write(1);
}
void usb_isr(void) {