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Issue #666 LPC1768 i2c_slave_read fix 

LPC1768 slave issues a STOP condition without waiting for master #666: https://developer.mbed.org/forum/bugs-suggestions/topic/5266/
pull/1473/head
jamofer 2015-12-13 23:25:23 +01:00
parent 1c75638d14
commit 929cf7ffe4
1 changed files with 9 additions and 2 deletions
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11
libraries/mbed/targets/hal/TARGET_NXP/TARGET_LPC176X/i2c_api.c
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@ -350,11 +350,18 @@ int i2c_slave_read(i2c_t *obj, char *data, int length) {
count++; count++;
} while (((status == 0x80) || (status == 0x90) || } while (((status == 0x80) || (status == 0x90) ||
(status == 0x060) || (status == 0x70)) && (count < length)); (status == 0x060) || (status == 0x70)) && (count < length));
// Clear old status and wait for Serial Interrupt.
i2c_clear_SI(obj);
i2c_wait_SI(obj);
// Obtain new status. (See Image-2)
status = i2c_status(obj);
if(status != 0xA0) { if(status != 0xA0) {
i2c_stop(obj); i2c_stop(obj);
} }
i2c_clear_SI(obj); i2c_clear_SI(obj);
return count; return count;