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wip: generate a buildable image

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Signed-off-by: Sean Cross <sean@xobs.io>
This commit is contained in:
Sean Cross 2019-01-23 15:25:07 +13:00
parent 9a14f6d08d
commit 167201228f
4 changed files with 175 additions and 13 deletions
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15
include/time.h Normal file
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#ifndef __TIME_H
#define __TIME_H
#ifdef __cplusplus
extern "C" {
#endif
void time_init(void);
int elapsed(int *last_event, int period);
#ifdef __cplusplus
}
#endif
#endif /* __TIME_H */

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input/top.bin
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163
src/main.c
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@ -3,46 +3,189 @@
#include <printf.h> #include <printf.h>
#include <uart.h> #include <uart.h>
#include <usb.h> #include <usb.h>
#include <time.h>
#include <generated/csr.h> #include <generated/csr.h>
void isr(void) { enum usb_responses {
USB_STALL = 0b11,
USB_ACK = 0b00,
USB_NAK = 0b01,
USB_NONE = 0b10,
};
void isr(void)
{
unsigned int irqs; unsigned int irqs;
irqs = irq_pending() & irq_getmask(); irqs = irq_pending() & irq_getmask();
// if (irqs & (1 << USB_INTERRUPT)) if (irqs & (1 << USB_INTERRUPT))
// usb_isr(); usb_isr();
if (irqs & (1 << UART_INTERRUPT)) if (irqs & (1 << UART_INTERRUPT))
uart_isr(); uart_isr();
} }
static void rv_putchar(void *ignored, char c) { static void rv_putchar(void *ignored, char c)
{
(void)ignored; (void)ignored;
uart_write(c); uart_write(c);
} }
static void init(void) { static void init(void)
{
irq_setmask(0); irq_setmask(0);
irq_setie(1); irq_setie(1);
uart_init(); uart_init();
usb_init(); usb_init();
time_init();
init_printf(NULL, rv_putchar); init_printf(NULL, rv_putchar);
} }
int main(int argc, char **argv) { static uint32_t read_timer(void)
{
timer0_update_value_write(1);
return timer0_value_read();
}
#ifdef CSR_USB_EP_0_OUT_EV_PENDING_ADDR
struct usb_status
{
// uint32_t out_ev_status;
uint32_t out_ev_pending;
uint32_t in_ev_status;
uint32_t out_last_tok;
uint32_t out_obuf_empty;
uint32_t in_ibuf_empty;
};
static struct usb_status get_status(void)
{
struct usb_status s;
// s.out_ev_status = usb_ep_0_out_ev_status_read();
s.out_ev_pending = usb_ep_0_out_ev_pending_read();
s.in_ev_status = usb_ep_0_in_ev_status_read();
s.out_last_tok = usb_ep_0_out_last_tok_read();
s.out_obuf_empty = usb_ep_0_out_obuf_empty_read();
s.in_ibuf_empty = usb_ep_0_in_ibuf_empty_read();
return s;
}
static void get_print_status(void)
{
static int loops;
int obufbuf_cnt = 0;
struct usb_status s = get_status();
// printf("i: %8d OEP: %02x OBE: %02x OLT: %02x\n",
// loops++,
// s.out_ev_pending,
// s.out_obuf_empty,
// s.out_last_tok);
if (s.out_ev_pending & (1 << 1)) {
loops++;
uint8_t obufbuf[128];
while (!usb_ep_0_out_obuf_empty_read()) {
uint32_t obh = usb_ep_0_out_obuf_head_read();
obufbuf[obufbuf_cnt++] = obh;
usb_ep_0_out_obuf_head_write(1);
}
int i;
printf("i: %d b: %d olt: %02x --", loops, obufbuf_cnt, s.out_last_tok);//obe: %d obh: %02x\n", i, obe, obh);
for (i = 0; i < obufbuf_cnt; i++) {
printf(" %02x", obufbuf[i]);
}
printf("\n");
usb_ep_0_out_ev_pending_write((1 << 1));
// Response
if (!usb_ep_0_in_ibuf_empty_read()) {
printf("USB ibuf still has data\n");
return;
}
uint32_t usb_in_pending = usb_ep_0_out_ev_pending_read();
if (usb_in_pending) {
printf("USB EP0 in pending is: %02x\n", usb_in_pending);
return;
}
for (i = 0; i < 0x20; i++) {
usb_ep_0_in_ibuf_head_write(i);
}
// Indicate that we respond with an ACK
usb_ep_0_in_respond_write(USB_ACK);
usb_ep_0_in_ev_pending_write(0xff);
}
}
#else
static void get_print_status(void)
{
static int loops;
uint32_t obe = usb_obuf_empty_read();
uint8_t obufbuf[128];
int obufbuf_cnt = 0;
loops++;
while (!usb_obuf_empty_read()) {
uint32_t obh = usb_obuf_head_read();
obufbuf[obufbuf_cnt++] = obh;
usb_obuf_head_write(1);
}
if (obufbuf_cnt) {
int i;
printf("i: %d b: %d --", loops, obufbuf_cnt);//obe: %d obh: %02x\n", i, obe, obh);
for (i = 0; i < obufbuf_cnt; i++) {
printf(" %02x", obufbuf[i]);
}
printf("\n");
}
// 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);
// }
}
#endif
int main(int argc, char **argv)
{
(void)argc; (void)argc;
(void)argv; (void)argv;
init(); init();
printf("\nStatus: %d\n", usb_ep_0_out_ev_pending_read());
get_print_status();
usb_pullup_out_write(1);
usb_ep_0_out_ev_pending_write((1 << 1));
printf("Status: %d\n", usb_ep_0_out_obuf_empty_read());
get_print_status();
int i = 0; int i = 0;
printf("Hello, world!\n"); printf("Hello, world!\n");
while (1) {
printf("10 PRINT HELLO, WORLD\n"); int last_event = 0;
printf("20 GOTO 10\n"); while (1)
printf("i: %d\n", i++); {
// unsigned int timer_val_ok = read_timer();
// int elapsed(int *last_event, int period)
elapsed(&last_event, 1000);
unsigned int timer_val_cur;
// timer_val_cur = read_timer();
// printf("10 PRINT HELLO, WORLD\n");
// printf("20 GOTO 10\n");
// printf("i: %d\n", i++);
// timer_val_cur = read_timer();
get_print_status();
// while (timer0_value_read() != timer_val_ok) {
// ;
// }
} }
return 0; return 0;
} }

6
src/usb.c
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@ -1,5 +1,9 @@
#include <generated/csr.h> #include <generated/csr.h>
void usb_init(void) { void usb_init(void) {
usb_pullup_out_write(1); // usb_pullup_out_write(1);
}
void usb_isr(void) {
} }