diff options
| -rw-r--r-- | nuttx/arch/arm/src/stm32/stm32_i2c.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/nuttx/arch/arm/src/stm32/stm32_i2c.c b/nuttx/arch/arm/src/stm32/stm32_i2c.c index 30a8dc5e4..44978862d 100644 --- a/nuttx/arch/arm/src/stm32/stm32_i2c.c +++ b/nuttx/arch/arm/src/stm32/stm32_i2c.c @@ -1184,6 +1184,9 @@ static int stm32_i2c_isr(struct stm32_i2c_priv_s *priv) priv->msgv++; priv->msgc--; + } else { + /* clear ISR by writing to DR register */ + stm32_i2c_putreg(priv, STM32_I2C_DR_OFFSET, 0); } } @@ -1191,7 +1194,11 @@ static int stm32_i2c_isr(struct stm32_i2c_priv_s *priv) else if ((status & I2C_SR1_ADD10) != 0) { - /* TODO: Finish 10-bit mode addressing */ + /* TODO: Finish 10-bit mode addressing + for now just clear ISR by writing to DR register. As we + don't do 10 bit addressing this must be a spurious ISR + */ + stm32_i2c_putreg(priv, STM32_I2C_DR_OFFSET, 0); } /* Was address sent, continue with either sending or reading data */ @@ -1251,6 +1258,9 @@ static int stm32_i2c_isr(struct stm32_i2c_priv_s *priv) #ifdef CONFIG_I2C_POLLED irqrestore(state); #endif + } else { + // throw away the unexpected byte + stm32_i2c_getreg(priv, STM32_I2C_DR_OFFSET); } } |