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i2c: implement target mode for rp2040 and nrf

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This commit is contained in:
Kenneth Bell
2023-03-25 16:27:54 +00:00
committed by Ron Evans
parent e0385e48d0
commit ad3e9e1a77
9 changed files with 479 additions and 27 deletions
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src/machine/machine_nrf.go
+14 -7
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@@ -206,6 +206,7 @@ type I2CConfig struct {
Frequency uint32
SCL Pin
SDA Pin
Mode I2CMode
}
// Configure is intended to setup the I2C interface.
@@ -238,15 +239,21 @@ func (i2c *I2C) Configure(config I2CConfig) error {
(nrf.GPIO_PIN_CNF_DRIVE_S0D1 << nrf.GPIO_PIN_CNF_DRIVE_Pos) |
(nrf.GPIO_PIN_CNF_SENSE_Disabled << nrf.GPIO_PIN_CNF_SENSE_Pos))
if config.Frequency >= 400*KHz {
i2c.Bus.FREQUENCY.Set(nrf.TWI_FREQUENCY_FREQUENCY_K400)
} else {
i2c.Bus.FREQUENCY.Set(nrf.TWI_FREQUENCY_FREQUENCY_K100)
}
i2c.setPins(config.SCL, config.SDA)
i2c.enableAsController()
i2c.mode = config.Mode
if i2c.mode == I2CModeController {
if config.Frequency >= 400*KHz {
i2c.Bus.FREQUENCY.Set(nrf.TWI_FREQUENCY_FREQUENCY_K400)
} else {
i2c.Bus.FREQUENCY.Set(nrf.TWI_FREQUENCY_FREQUENCY_K100)
}
i2c.enableAsController()
} else {
i2c.enableAsTarget()
}
return nil
}