2 /* According to POSIX.1-2001 */
3 #include <sys/select.h>
11 #include "stlink-common.h"
13 #define STLINKY_MAGIC 0xDEADF00D
22 /* Detects stlinky in RAM, returns handler */
23 struct stlinky* stlinky_detect(stlink_t* sl)
25 static const uint32_t sram_base = 0x20000000;
26 struct stlinky* st = malloc(sizeof(struct stlinky));
28 printf("sram: 0x%x bytes @ 0x%x\n", sl->sram_base, sl->sram_size);
30 for (off = 0; off < sl->sram_size; off += 4) {
31 stlink_read_mem32(sl, sram_base + off, 4);
32 if ( STLINKY_MAGIC== *(uint32_t*) sl->q_buf)
34 printf("stlinky detected at 0x%x\n", sram_base + off);
35 st->off = sram_base + off;
36 stlink_read_mem32(sl, st->off + 4, 4);
37 st->bufsize = (size_t) *(unsigned char*) sl->q_buf;
38 printf("stlinky buffer size 0x%zu\n", st->bufsize);
45 int stlinky_canrx(struct stlinky *st)
47 stlink_read_mem32(st->sl, st->off+4, 4);
48 unsigned char tx = (unsigned char) st->sl->q_buf[1];
52 size_t stlinky_rx(struct stlinky *st, char* buffer)
56 stlink_read_mem32(st->sl, st->off+4, 4);
57 tx = (unsigned char) st->sl->q_buf[1];
59 size_t rs = tx + (4 - (tx % 4)); /* voodoo */
60 stlink_read_mem32(st->sl, st->off+8, rs);
61 memcpy(buffer, st->sl->q_buf, (size_t) tx);
63 stlink_write_mem8(st->sl, st->off+5, 1);
67 size_t stlinky_tx(struct stlinky *st, char* buffer, size_t sz)
71 stlink_read_mem32(st->sl, st->off+4, 4);
72 rx = (unsigned char) st->sl->q_buf[2];
74 memcpy(st->sl->q_buf, buffer, sz);
75 size_t rs = sz + (4 - (sz % 4)); /* voodoo */
76 stlink_write_mem32(st->sl, st->off+8+st->bufsize, rs);
77 *st->sl->q_buf=(unsigned char) sz;
78 stlink_write_mem8(st->sl, st->off+6, 1);
89 FD_SET(STDIN_FILENO, &fds); //STDIN_FILENO is 0
90 select(STDIN_FILENO+1, &fds, NULL, NULL, &tv);
91 return FD_ISSET(STDIN_FILENO, &fds);
94 void nonblock(int state)
96 struct termios ttystate;
98 //get the terminal state
99 tcgetattr(STDIN_FILENO, &ttystate);
103 //turn off canonical mode
104 ttystate.c_lflag &= ~ICANON;
105 ttystate.c_lflag &= ~ECHO;
106 //minimum of number input read.
107 ttystate.c_cc[VMIN] = 1;
111 //turn on canonical mode
112 ttystate.c_lflag |= ICANON | ECHO;
114 //set the terminal attributes.
115 tcsetattr(STDIN_FILENO, TCSANOW, &ttystate);
119 static int keep_running = 1;
120 void cleanup(int dummy)
123 printf("\n\nGot a signal - terminating\n");
127 int main(int ac, char** av) {
133 sl = stlink_open_usb(10);
135 printf("ST-Linky proof-of-concept terminal :: Created by Necromant for lulz\n");
137 stlink_enter_swd_mode(sl);
138 printf("chip id: %#x\n", sl->chip_id);
139 printf("core_id: %#x\n", sl->core_id);
141 cortex_m3_cpuid_t cpuid;
142 stlink_cpu_id(sl, &cpuid);
143 printf("cpuid:impl_id = %0#x, variant = %#x\n", cpuid.implementer_id, cpuid.variant);
144 printf("cpuid:part = %#x, rev = %#x\n", cpuid.part, cpuid.revision);
147 stlink_force_debug(sl);
151 /* wait for device to boot */
152 /* TODO: Make timeout adjustable via command line */
155 struct stlinky *st = stlinky_detect(sl);
158 printf("stlinky magic not found in sram :(");
160 char* rxbuf = malloc(st->bufsize);
161 char* txbuf = malloc(st->bufsize);
164 int fd = fileno(stdin);
165 int saved_flags = fcntl(fd, F_GETFL);
166 fcntl(fd, F_SETFL, saved_flags & ~O_NONBLOCK);
167 signal(SIGINT, cleanup);
168 printf("Entering interactive terminal. CTRL+C to exit\n");
170 if (stlinky_canrx(st)) {
171 tmp = stlinky_rx(st, rxbuf);
172 fwrite(rxbuf,tmp,1,stdout);
176 tmp = read(fd, txbuf, st->bufsize);
177 stlinky_tx(st,txbuf,tmp);
183 stlink_exit_debug_mode(sl);