diff options
Diffstat (limited to 'src/machine/machine_nrf.go')
| -rw-r--r-- | src/machine/machine_nrf.go | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/src/machine/machine_nrf.go b/src/machine/machine_nrf.go index 346a0bb2e..d7b87d9ae 100644 --- a/src/machine/machine_nrf.go +++ b/src/machine/machine_nrf.go @@ -203,6 +203,8 @@ func (uart *UART) handleInterrupt(interrupt.Interrupt) { } } +const i2cTimeout = 0xffff // this is around 29ms on a nrf52 + // I2CConfig is used to store config info for I2C. type I2CConfig struct { Frequency uint32 @@ -261,11 +263,17 @@ func (i2c *I2C) Configure(config I2CConfig) error { } // signalStop sends a stop signal to the I2C peripheral and waits for confirmation. -func (i2c *I2C) signalStop() { +func (i2c *I2C) signalStop() error { + tries := 0 i2c.Bus.TASKS_STOP.Set(1) for i2c.Bus.EVENTS_STOPPED.Get() == 0 { + tries++ + if tries >= i2cTimeout { + return errI2CSignalStopTimeout + } } i2c.Bus.EVENTS_STOPPED.Set(0) + return nil } var rngStarted = false |