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/* sbc_harness/main.c - Main entry point and event loop for sbc-harness
*
* Copyright (C) 2024 Luke T. Shumaker <lukeshu@lukeshu.com>
* SPDX-License-Identifier: AGPL-3.0-or-later
*/
#include <string.h> /* libc: for strlen() */
#include <stdio.h> /* libc: for printf() */
#include <pico/stdlib.h> /* pico-sdk:pico_stdlib: for stdio_uart_init() */
#include <hardware/flash.h> /* pico-sdk:hardware_flash: for flash_get_unique_id() */
#include <libcr/coroutine.h>
#include <libhw/rp2040_hwspi.h>
#include <libhw/w5500.h>
#include <libmisc/hash.h>
#include <libusb/usb_common.h>
#include "usb_keyboard.h"
COROUTINE hello_world_cr(void *_chan) {
const char *msg = "Hello world!\n";
usb_keyboard_rpc_t *chan = _chan;
cr_begin();
for (size_t i = 0;; i = (i+1) % strlen(msg)) {
int result = usb_keyboard_rpc_send_req(chan, (uint32_t)msg[i]);
if (result < 1) {
printf("error!\n");
break;
}
}
cr_end();
}
int main() {
/* initialization *****************************************************/
stdio_uart_init();
/* NOR flash chips have a (bog-?)standard "RUID" "Read Unique
* ID" instruction; use our flash chip's unique ID as the
* basis for our serial numbers. */
uint64_t flash_id64;
static_assert(sizeof(flash_id64) == FLASH_UNIQUE_ID_SIZE_BYTES);
flash_get_unique_id((uint8_t *)&flash_id64);
uint32_t flash_id32 = hash(&flash_id64, sizeof(flash_id64));
static_assert(sizeof(flash_id32) == sizeof(hash(NULL, 0)));
uint8_t flash_id24[3] = {
(uint8_t)((flash_id32 >> 16) & 0xFF),
(uint8_t)((flash_id32 >> 8) & 0xFF),
(uint8_t)((flash_id32 >> 0) & 0xFF),
};
struct rp2040_hwspi dev_spi;
struct w5500 dev_w5500;
rp2040_hwspi_init(&dev_spi, "W5500", RP2040_HWSPI_0,
SPI_MODE_0, /* the W5500 supports mode 0 or mode 3 */
80*1000*1000, /* run at the W5500's max rate of 80MHz */
16, /* PIN_MISO */
19, /* PIN_MOSI */
18, /* PIN_CLK */
17); /* PIN_CS */
w5500_init(&dev_w5500, "W5500", &dev_spi,
21, /* PIN_INTR */
20, /* PIN_RESET */
((struct net_eth_addr){{
/* vendor ID: "Wiznet" */
0x00, 0x08, 0xDC,
/* serial number */
flash_id24[0], flash_id24[1], flash_id24[2],
}}));
usb_common_earlyinit();
usb_keyboard_init();
usb_common_lateinit();
/* set up coroutines **************************************************/
coroutine_add(usb_common_cr, NULL);
usb_keyboard_rpc_t keyboard_chan = {0};
coroutine_add(usb_keyboard_cr, &keyboard_chan);
//coroutine_add(hello_world_cr, &keyboard_chan);
//coroutine_add(dhcp_client_cr, NULL);
/* event loop *********************************************************/
coroutine_main();
}
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