diff options
Diffstat (limited to 'os/hal/platforms/STM32/i2c_lld.h')
| -rw-r--r-- | os/hal/platforms/STM32/i2c_lld.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/os/hal/platforms/STM32/i2c_lld.h b/os/hal/platforms/STM32/i2c_lld.h index 268e7264d..00c6410fa 100644 --- a/os/hal/platforms/STM32/i2c_lld.h +++ b/os/hal/platforms/STM32/i2c_lld.h @@ -185,6 +185,19 @@ struct I2CDriver{ /* Driver macros. */ /*===========================================================================*/ +#define i2c_lld_bus_is_busy(i2cp) \ + (i2cp->id_i2c->SR2 & I2C_SR2_BUSY) + + +/* Wait until BUSY flag is reset: a STOP has been generated on the bus + * signaling the end of transmission + */ +#define i2c_lld_wait_bus_free(i2cp) { \ + uint32_t tmo = 0xffff; \ + while((i2cp->id_i2c->SR2 & I2C_SR2_BUSY) && tmo--) \ + ; \ +} + /*===========================================================================*/ /* External declarations. */ /*===========================================================================*/ @@ -211,6 +224,7 @@ void i2c_lld_start(I2CDriver *i2cp); void i2c_lld_stop(I2CDriver *i2cp); void i2c_lld_master_transmit(I2CDriver *i2cp); void i2c_lld_master_receive(I2CDriver *i2cp); +void i2c_lld_master_transceive(I2CDriver *i2cp); #ifdef __cplusplus } |