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machine/circuitplay: correct pin and pin mode mapping for both i2c0 (external) and i2c1 (internal) buses

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Signed-off-by: Ron Evans <ron@hybridgroup.com>
This commit is contained in:
Ron Evans
2019-04-05 12:10:19 +02:00
committed by Ayke
parent ebebdd5651
commit ae4ead8690
2 changed files with 17 additions and 6 deletions
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src/machine/machine_atsamd21.go
+7 -4
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@@ -572,7 +572,10 @@ func handleUART1() {
// I2C on the SAMD21.
type I2C struct {
Bus *sam.SERCOM_I2CM_Type
Bus *sam.SERCOM_I2CM_Type
SCL uint8
SDA uint8
PinMode GPIOMode
}
// I2CConfig is used to store config info for I2C.
@@ -608,7 +611,7 @@ func (i2c I2C) Configure(config I2CConfig) {
config.Frequency = TWI_FREQ_100KHZ
}
// reset SERCOM3
// reset SERCOM
i2c.Bus.CTRLA |= sam.SERCOM_I2CM_CTRLA_SWRST
for (i2c.Bus.CTRLA&sam.SERCOM_I2CM_CTRLA_SWRST) > 0 ||
(i2c.Bus.SYNCBUSY&sam.SERCOM_I2CM_SYNCBUSY_SWRST) > 0 {
@@ -632,8 +635,8 @@ func (i2c I2C) Configure(config I2CConfig) {
}
// enable pins
GPIO{SDA_PIN}.Configure(GPIOConfig{Mode: GPIO_SERCOM})
GPIO{SCL_PIN}.Configure(GPIOConfig{Mode: GPIO_SERCOM})
GPIO{i2c.SDA}.Configure(GPIOConfig{Mode: i2c.PinMode})
GPIO{i2c.SCL}.Configure(GPIOConfig{Mode: i2c.PinMode})
}
// SetBaudRate sets the communication speed for the I2C.