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machine/stm32: add i2c Frequency and SetBaudRate() function for boards that were missing implementation

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Signed-off-by: deadprogram <ron@hybridgroup.com>
This commit is contained in:
deadprogram
2024-05-06 19:29:11 +02:00
committed by Ron Evans
parent 72f30ca6ec
commit 7d6b667bba
8 changed files with 121 additions and 22 deletions
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src/machine/machine_stm32l0.go
+14 -3
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@@ -298,9 +298,20 @@ func (spi SPI) configurePins(config SPIConfig) {
//---------- I2C related types and 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 80MHz PCLK1.
// for 16MHz PCLK1.
// TODO: Do calculations based on PCLK1
return 0x00303D5B
switch br {
case 10 * KHz:
return 0x40003EFF
case 100 * KHz:
return 0x00303D5B
case 400 * KHz:
return 0x0010061A
case 500 * KHz:
return 0x00000117
default:
return 0
}
}