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Use checksums for d868uv.

This commit is contained in:
Serge 2018-10-13 23:14:28 -07:00
parent b9ce8e4acf
commit 0326291227
2 changed files with 37 additions and 14 deletions
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4
d868uv.c
View File

@ -41,8 +41,8 @@
#define NSCANL 250
#define NMESSAGES 100
//#define MEMSZ 0x100000
#define MEMSZ 0x4300000
#define MEMSZ 0x10000
//#define MEMSZ 0x4300000
//
// Print a generic information about the device.

47
serial.c
View File

@ -648,7 +648,7 @@ void serial_read_region(int addr, unsigned char *data, int nbytes)
{
static const int DATASZ = 64;
unsigned char cmd[6], reply[8 + DATASZ];
int n;
int n, i, retry = 0;
for (n=0; n<nbytes; n+=DATASZ) {
// Read command: 52 aa aa aa aa 10
@ -658,36 +658,59 @@ void serial_read_region(int addr, unsigned char *data, int nbytes)
cmd[3] = (addr + n) >> 8;
cmd[4] = addr + n;
cmd[5] = DATASZ;
again:
send_recv(cmd, 6, reply, sizeof(reply));
if (reply[0] != CMD_WRITE[0] || reply[7+DATASZ] != CMD_ACK[0]) {
fprintf(stderr, "%s: Wrong read reply %02x-...-%02x, expected %02x-...-%02x\n",
__func__, reply[0], reply[7+DATASZ], CMD_WRITE[0], CMD_ACK[0]);
exit(-1);
}
// Compute checksum.
unsigned char sum = reply[1];
for (i=2; i<6+DATASZ; i++)
sum += reply[i];
if (reply[6+DATASZ] != sum) {
fprintf(stderr, "%s: Wrong read checksum %02x, expected %02x\n",
__func__, sum, reply[6+DATASZ]);
if (retry++ < 3)
goto again;
exit(-1);
}
memcpy(data + n, reply + 6, DATASZ);
}
}
void serial_write_region(int addr, unsigned char *data, int nbytes)
{
//TODO
#if 0
unsigned char ack, cmd[4+32];
int n;
static const int DATASZ = 64;
unsigned char ack, cmd[8 + DATASZ];
int n, i;
for (n=0; n<nbytes; n+=32) {
for (n=0; n<nbytes; n+=DATASZ) {
// Write command: 57 aa aa aa aa 10 .. .. ss nn
cmd[0] = CMD_WRITE[0];
cmd[1] = (addr + n) >> 8;
cmd[2] = addr + n;
cmd[3] = 32;
memcpy(cmd + 4, data + n, 32);
send_recv(cmd, 4+32, &ack, 1);
cmd[1] = (addr + n) >> 24;
cmd[2] = (addr + n) >> 16;
cmd[3] = (addr + n) >> 8;
cmd[4] = addr + n;
cmd[5] = DATASZ;
memcpy(cmd + 6, data + n, DATASZ);
// Compute checksum.
unsigned char sum = cmd[1];
for (i=2; i<6+DATASZ; i++)
sum += cmd[i];
cmd[6 + DATASZ] = sum;
cmd[7 + DATASZ] = CMD_ACK[0];
send_recv(cmd, 8 + DATASZ, &ack, 1);
if (ack != CMD_ACK[0]) {
fprintf(stderr, "%s: Wrong acknowledge %#x, expected %#x\n",
__func__, ack, CMD_ACK[0]);
exit(-1);
}
}
#endif
}