stm32: fix timeout for i2c comms

ticks changed to 16ns causing timeouts to be very, very short. This change updates timeouts for 16ns ticks.
3 years ago · 6cbaed75c8
1 changed files with 5 additions and 1 deletions
--- a/src/machine/machine_stm32_i2c_revb.go
+++ b/src/machine/machine_stm32_i2c_revb.go
@ -1,3 +1,4 @@
+//go:build stm32l5 || stm32f7 || stm32l4 || stm32l0
 // +build stm32l5 stm32f7 stm32l4 stm32l0

 package machine
@ -27,7 +28,10 @@ const (

 const (
 	MAX_NBYTE_SIZE = 255
-	TIMEOUT_TICKS  = 100 // 100ms
+
+	// 100ms delay = 100e6ns / 16ns
+	// In runtime_stm32_timers.go, tick is fixed at 16ns per tick
+	TIMEOUT_TICKS = 100e6 / 16

 	I2C_NO_STARTSTOP         = 0x0
 	I2C_GENERATE_START_WRITE = 0x80000000 | stm32.I2C_CR2_START