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fixed read loop to be slightly less CPU speed dependent

This commit is contained in:
Joakim Eriksson 2012-10-01 13:09:16 +02:00
parent d84a97103f
commit 621790f156
1 changed files with 4 additions and 3 deletions
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7
core/dev/sht11.c
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@ -250,7 +250,7 @@ sht11_off(void)
static unsigned int static unsigned int
scmd(unsigned cmd) scmd(unsigned cmd)
{ {
unsigned long n; unsigned int n;
if(cmd != MEASURE_HUMI && cmd != MEASURE_TEMP) { if(cmd != MEASURE_HUMI && cmd != MEASURE_TEMP) {
PRINTF("Illegal command: %d\n", cmd); PRINTF("Illegal command: %d\n", cmd);
@ -263,7 +263,7 @@ scmd(unsigned cmd)
goto fail; goto fail;
} }
for(n = 0; n < 250000; n++) { for(n = 0; n < 20000; n++) {
if(!SDA_IS_1) { if(!SDA_IS_1) {
unsigned t0, t1, rcrc; unsigned t0, t1, rcrc;
t0 = sread(1); t0 = sread(1);
@ -285,8 +285,9 @@ scmd(unsigned cmd)
#endif #endif
return (t0 << 8) | t1; return (t0 << 8) | t1;
} }
/* short wait before next loop */
clock_wait(1);
} }
fail: fail:
sreset(); sreset();
return -1; return -1;