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machine/rp2040: correct issue with i2c pin validation

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Signed-off-by: deadprogram <ron@hybridgroup.com>
This commit is contained in:
deadprogram
2023-02-23 16:06:02 +01:00
committed by Ron Evans
parent 96b70fd619
commit 6df303ff19
1 changed files with 10 additions and 8 deletions
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src/machine/machine_rp2040_i2c.go
+10 -8
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@@ -103,21 +103,23 @@ func (i2c *I2C) Configure(config I2CConfig) error {
config.SDA = I2C1_SDA_PIN
}
}
var okSDA, okSCL bool
var okSCL, okSDA bool
switch i2c.Bus {
case rp.I2C0:
okSDA = config.SDA%4 == 0
okSCL = (config.SCL+1)%4 == 0
case rp.I2C1:
okSDA = (config.SDA+2)%4 == 0
okSCL = (config.SCL+3)%4 == 0
okSDA = (config.SDA+4)%4 == 0
case rp.I2C1:
okSCL = (config.SCL+1)%4 == 0
okSDA = (config.SDA+2)%4 == 0
}
if !okSDA {
return errInvalidI2CSDA
} else if !okSCL {
switch {
case !okSCL:
return errInvalidI2CSCL
case !okSDA:
return errInvalidI2CSDA
}
if config.Frequency == 0 {
config.Frequency = defaultBaud
}