diff options
Diffstat (limited to 'src/machine/machine_stm32l4x5.go')
| -rw-r--r-- | src/machine/machine_stm32l4x5.go | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/src/machine/machine_stm32l4x5.go b/src/machine/machine_stm32l4x5.go index ec06544ba..c8c550c3d 100644 --- a/src/machine/machine_stm32l4x5.go +++ b/src/machine/machine_stm32l4x5.go @@ -17,9 +17,20 @@ const APB2_TIM_FREQ = 120e6 // 120MHz //---------- I2C related code // Gets the value for TIMINGR register -func (i2c *I2C) getFreqRange() uint32 { +func (i2c *I2C) getFreqRange(br uint32) uint32 { // This is a 'magic' value calculated by STM32CubeMX // for 120MHz PCLK1. // TODO: Do calculations based on PCLK1 - return 0x307075B1 + switch br { + case 10 * KHz: + return 0x0 // does this even work? zero is weird here. + case 100 * KHz: + return 0x307075B1 + case 400 * KHz: + return 0x00B03FDB + case 500 * KHz: + return 0x005017C7 + default: + return 0 + } } |