Hi Len,
Unfortunately I have not been able to create something easily reproducible for the strtok() issue. It's a problem that only seems to show up in my full application and not when I create a minimal example. It's in the thread I linked in my first post, but I'll put it here as well:
/** Tokenize
* - Splits incoming string into individual substrings
* - Splits on comma, space, or underscore characters
* - This should normally break out upon finding strtok() finding the end of the input string
* For some reason, this function can continue running even when pch==NULL.
* - Added a break if count >= MAX_NUM_CMDS to protect from this overrun.
*/
static void Tokenize(char* src, char dest[MAX_NUM_CMDS][CMD_MAX_CHAR]){
uint8_t count = 0;
char * pch;
pch = strtok(src, ", _");
while (pch != NULL){
memcpy(dest[count++], pch, CMD_MAX_CHAR);
pch = strtok(NULL, ", _");
if (count >= MAX_NUM_CMDS){
break;
}
}
}
The string I am sending to reproduce this is simple, "00\r\n". The first pch=strtok(src, ", _"); line performs as expected, I drop into the while() loop, and the 2nd call pch=strtok(NULL, ", _") is what gets stuck. I can confirm the entire string "00\r\n" is getting copied to dest[0], so the call should just give back null (the rest of src is just null characters, 0x00), and I should exit the while loop. Instead I am getting stuck inside strtok() on this call.
It is getting stuck in looping endlessly inside strtok_r when I step through in the disassembly:
0x000077AC ldrb.w r6, [r7], #1
0x000077B0 cmp r5, r6
0x000077B2 beq.n 77c4 <__strtok_r+0x48>
0x000077B4 cmp r6, #0
0x000077B6 bne.n 77ac <__strtok_r+0x30>
It's wild, because I just can't think of any reason that it would loop infinitely there in my application but work fine when I create a minimal example on my -050 test kit. The only explanation I can think of is the specific part, this code (application and all) works fine when I use a CY8C5667AXI-LP040, and it works when I try and create a minimal example on the CY8C5868AXI-LP035 as part of the 050 kit, but when we switched to a CY8C5468AXI-LP106 due to part availability it loops as described above. Unfortunately it wasn't reproducible by Gautami_12 in my least thread.
I did find the workaround to get strtok() going again was to disable newlib nano, thus leading to my issue of appearing to break float formatting.
