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machine/i2c: add interface check and implementation where missing for SetBaudRate() (#3406)

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* machine/i2c: add interface check and placeholder implementation where missing for SetBaudRate()
This commit is contained in:
Ron Evans
2023-10-14 13:17:24 +02:00
committed by GitHub
parent 72b715fa99
commit 935a293106
11 changed files with 104 additions and 42 deletions
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src/machine/machine_k210.go
+13 -6
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@@ -563,7 +563,19 @@ func (i2c *I2C) Configure(config I2CConfig) error {
config.SCL.SetFPIOAFunction(FUNC_I2C2_SCLK)
}
div := CPUFrequency() / config.Frequency / 16
i2c.SetBaudRate(config.Frequency)
i2c.Bus.INTR_MASK.Set(0)
i2c.Bus.DMA_CR.Set(0x03)
i2c.Bus.DMA_RDLR.Set(0)
i2c.Bus.DMA_TDLR.Set(0x4)
return nil
}
// SetBaudRate sets the communication speed for I2C.
func (i2c *I2C) SetBaudRate(br uint32) error {
div := CPUFrequency() / br / 16
// Disable controller before setting the prescale register.
i2c.Bus.ENABLE.Set(0)
@@ -574,11 +586,6 @@ func (i2c *I2C) Configure(config I2CConfig) error {
i2c.Bus.SS_SCL_HCNT.Set(uint32(div))
i2c.Bus.SS_SCL_LCNT.Set(uint32(div))
i2c.Bus.INTR_MASK.Set(0)
i2c.Bus.DMA_CR.Set(0x03)
i2c.Bus.DMA_RDLR.Set(0)
i2c.Bus.DMA_TDLR.Set(0x4)
return nil
}