mirror of
https://github.com/isometimes/rpi4-osdev
synced 2024-11-09 20:00:40 +00:00
243 lines
6.2 KiB
C
243 lines
6.2 KiB
C
#include "breakout.h"
|
|
#include "include/multicore.h"
|
|
#include "include/io.h"
|
|
#include "include/bt.h"
|
|
#include "include/fb.h"
|
|
|
|
#define MAX_MSG_LEN 50
|
|
#define MAX_READ_RUN 100
|
|
|
|
unsigned char data_buf[MAX_MSG_LEN];
|
|
unsigned int data_len;
|
|
unsigned int messages_received = 0;
|
|
unsigned int poll_state = 0;
|
|
|
|
enum {
|
|
LE_EVENT_CODE = 0x3e,
|
|
LE_CONNECT_CODE = 0x01,
|
|
LE_ADREPORT_CODE = 0x02,
|
|
HCI_ACL_PKT = 0x02,
|
|
HCI_EVENT_PKT = 0x04
|
|
};
|
|
|
|
unsigned int got_echo_sid = 0;
|
|
unsigned int got_echo_name = 0;
|
|
unsigned char echo_addr[6];
|
|
|
|
unsigned int connected = 0;
|
|
unsigned int connection_handle = 0;
|
|
|
|
volatile unsigned int comms_up = 0;
|
|
|
|
int memcmp(const char *str1, const char *str2, int count) {
|
|
const char *s1 = (const char*)str1;
|
|
const char *s2 = (const char*)str2;
|
|
|
|
while (count-- > 0) {
|
|
if (*s1++ != *s2++) return s1[-1] < s2[-1] ? -1 : 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
void hci_poll2(unsigned char byte)
|
|
{
|
|
switch (poll_state) {
|
|
case 0:
|
|
if (byte != HCI_EVENT_PKT) poll_state = 0;
|
|
else poll_state = 1;
|
|
break;
|
|
case 1:
|
|
if (byte != LE_EVENT_CODE) poll_state = 0;
|
|
else poll_state = 2;
|
|
break;
|
|
case 2:
|
|
if (byte > MAX_MSG_LEN) poll_state = 0;
|
|
else {
|
|
poll_state = 3;
|
|
data_len = byte;
|
|
}
|
|
break;
|
|
default:
|
|
data_buf[poll_state - 3] = byte;
|
|
if (poll_state == data_len + 3 - 1) {
|
|
messages_received++;
|
|
poll_state = 0;
|
|
} else poll_state++;
|
|
}
|
|
}
|
|
|
|
unsigned char *hci_poll()
|
|
{
|
|
unsigned int goal = messages_received + 1;
|
|
|
|
if (bt_isReadByteReady()) {
|
|
unsigned int run = 0;
|
|
|
|
while (run < MAX_READ_RUN && messages_received < goal && bt_isReadByteReady()) {
|
|
unsigned char byte = bt_readByte();
|
|
hci_poll2(byte);
|
|
run++;
|
|
}
|
|
if (run == MAX_READ_RUN) return 0;
|
|
else return data_buf;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
void bt_search(void) {
|
|
unsigned char *buf;
|
|
|
|
while ( (buf = hci_poll()) ) {
|
|
if (data_len >= 2) {
|
|
if (buf[0] == LE_ADREPORT_CODE) {
|
|
if (buf[1] == 1) { // num_reports
|
|
if (buf[2] == 0) { // event_type
|
|
int bufindex = 0;
|
|
unsigned char ad_len = buf[11];
|
|
|
|
for (int c=9;c>=4;c--) echo_addr[9-c] = buf[bufindex + c]; // save the mac address
|
|
bufindex += 11;
|
|
|
|
got_echo_sid = 0; got_echo_name = 0; // Reset the search state machine
|
|
do {
|
|
ad_len = buf[bufindex];
|
|
unsigned char ad_type = buf[bufindex + 1];
|
|
bufindex += 2;
|
|
|
|
if (ad_len >= 2) {
|
|
if (ad_type == 0x03) {
|
|
unsigned int sid = buf[bufindex] | (buf[bufindex + 1] << 8);
|
|
if (sid == 0xEC00) {
|
|
got_echo_sid = 1;
|
|
debugstr("got sid... ");
|
|
}
|
|
} else if (ad_type == 0x09) {
|
|
char remote_name[ad_len - 1];
|
|
unsigned int d=0;
|
|
|
|
while (d<ad_len - 1) {
|
|
remote_name[d] = buf[bufindex + d];
|
|
d++;
|
|
}
|
|
if (!memcmp(remote_name,"echo",4)) {
|
|
got_echo_name = 1;
|
|
debugstr("got name... ");
|
|
}
|
|
}
|
|
}
|
|
|
|
bufindex += ad_len - 1;
|
|
} while (bufindex < data_len);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void bt_conn()
|
|
{
|
|
unsigned char *buf;
|
|
|
|
while ( (buf = hci_poll()) ) {
|
|
if (!connected && data_len >= 2 && buf[0] == LE_CONNECT_CODE) {
|
|
connected = !*(buf+1);
|
|
debughex(connected); debugstr(" ");
|
|
connection_handle = *(buf+2) | (*(buf+3) << 8);
|
|
debughex(connection_handle); debugstr(" ");
|
|
|
|
if (connection_handle == 0) wait_msec(0x186A);
|
|
}
|
|
}
|
|
}
|
|
|
|
void acl_poll()
|
|
{
|
|
while (bt_isReadByteReady()) {
|
|
unsigned char byte = bt_waitReadByte();
|
|
|
|
if (byte == HCI_EVENT_PKT) {
|
|
bt_waitReadByte(); // opcode
|
|
unsigned char length = bt_waitReadByte();
|
|
for (int i=0;i<length;i++) bt_waitReadByte();
|
|
} else if (byte == HCI_ACL_PKT) {
|
|
unsigned char h1 = bt_waitReadByte(); // handle1
|
|
unsigned char h2 = bt_waitReadByte(); // handle2
|
|
unsigned char thandle = h1 | (h2 << 8);
|
|
|
|
unsigned char d1 = bt_waitReadByte();
|
|
unsigned char d2 = bt_waitReadByte();
|
|
|
|
unsigned int dlen = d1 | (d2 << 8);
|
|
unsigned char data[dlen];
|
|
|
|
if (dlen > 7) {
|
|
for (int i=0;i<dlen;i++) data[i] = bt_waitReadByte();
|
|
|
|
unsigned int length = data[0] | (data[1] << 8);
|
|
unsigned int channel = data[2] | (data[3] << 8);
|
|
unsigned char opcode = data[4];
|
|
|
|
if (thandle == connection_handle && length == 4 && opcode == 0x1b) {
|
|
if (channel == 4 && data[5] == 0x2a && data[6] == 0x00) {
|
|
dir = data[7];
|
|
moveObject(paddle, MARGIN + (dir * ((VIRTWIDTH - paddlewidth + MARGIN)/100)), paddle->y);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void comms_core(void)
|
|
{
|
|
clear_core3();
|
|
|
|
uart_init();
|
|
bt_init();
|
|
|
|
debugstr("Initialising Bluetooth: ");
|
|
debugstr(">> reset: ");
|
|
bt_reset();
|
|
debugstr(">> firmware load: ");
|
|
bt_loadfirmware();
|
|
debugstr(">> set baud: ");
|
|
bt_setbaud();
|
|
debugstr(">> set bdaddr: ");
|
|
bt_setbdaddr();
|
|
|
|
// Print the BD_ADDR
|
|
unsigned char local_addr[6];
|
|
bt_getbdaddr(local_addr);
|
|
for (int c=5;c>=0;c--) debugch(local_addr[c]);
|
|
debugcrlf();
|
|
|
|
// Start scanning
|
|
debugstr("Setting event mask... ");
|
|
setLEeventmask(0xff);
|
|
debugstr("Starting scanning... ");
|
|
startActiveScanning();
|
|
|
|
// Search for the echo
|
|
debugstr("Waiting...");
|
|
debugcrlf();
|
|
while (!(got_echo_sid && got_echo_name)) bt_search();
|
|
stopScanning();
|
|
for (int c=0;c<=5;c++) debugch(echo_addr[c]);
|
|
debugcrlf();
|
|
|
|
// Connecting to echo
|
|
debugstr("Connecting to echo: ");
|
|
connect(echo_addr);
|
|
while (!(connected && connection_handle)) bt_conn();
|
|
debugstr("Connected!");
|
|
debugcrlf();
|
|
|
|
// Subscribe to updates
|
|
debugstr("Sending read request: ");
|
|
debughex(connection_handle); debugcrlf();
|
|
sendACLsubscribe(connection_handle);
|
|
|
|
comms_up = 1;
|
|
while (1) acl_poll();
|
|
}
|