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samd21: i2c: clear timeout_counter

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If not cleared, long writes timeout incorrectly
This commit is contained in:
Michael Andersen 2016-09-07 18:21:38 -07:00 committed by GitHub
parent 379560752c
commit 082d8e85a9
1 changed files with 1 additions and 0 deletions
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cpu/samd21/periph/i2c.c
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@ -447,6 +447,7 @@ static inline int _write(SercomI2cm *dev, char *data, int length)
dev->DATA.reg = data[buffer_counter++];
DEBUG("Wait for response.\n");
timeout_counter = 0;
while (!(dev->INTFLAG.reg & SERCOM_I2CM_INTFLAG_MB)
&& !(dev->INTFLAG.reg & SERCOM_I2CM_INTFLAG_SB)) {
if (++timeout_counter >= SAMD21_I2C_TIMEOUT) {