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Code Issues Releases Wiki Activity

Increase timeout waiting for the beginning of the connected device answer.

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Fixes performance pad.
This commit is contained in:
Raphaël Assénat 2013-11-02 16:13:42 +00:00
parent 1f3b8f8d74
commit 42bd4fb58a
1 changed files with 8 additions and 4 deletions
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12
maplebus.c
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@ -223,14 +223,18 @@ int maple_receiveFrame(unsigned char *data, unsigned int maxlen)
// " cbi 0x5, 4 \n" // " cbi 0x5, 4 \n"
// Loop until a change is detected. // Loop until a change is detected.
" ldi r19, 10 \n"
"wait_start_outer: \n"
" dec r19 \n"
" breq timeout \n"
" ldi r18, 255 \n" " ldi r18, 255 \n"
" in r17, %2 \n" " in r17, %2 \n"
"wait_start: \n" "wait_start_inner: \n"
" dec r18 \n" " dec r18 \n"
" breq timeout \n" " breq wait_start_outer \n"
" in r16, %2 \n" " in r16, %2 \n"
" cp r16, r17 \n" " cp r16, r17 \n"
" breq wait_start \n" " breq wait_start_inner \n"
" rjmp start_rx \n" " rjmp start_rx \n"
"timeout:\n" "timeout:\n"
@ -258,7 +262,7 @@ int maple_receiveFrame(unsigned char *data, unsigned int maxlen)
" pop r30 \n" // 2 " pop r30 \n" // 2
: "=z"(tmp), "=r"(timeout) : "=z"(tmp), "=r"(timeout)
: "I" (_SFR_IO_ADDR(PINC)) : "I" (_SFR_IO_ADDR(PINC))
: "r16","r17","r18") ; : "r16","r17","r18","r19") ;
if (timeout) if (timeout)
return -1; return -1;