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deadprogram
c21cd39813
This completely refactors the interface and implementation for the si5351 clock generator. The interface based on the Arduino implementation was both somewhat hard to work with and also missing a number of important features that are needed to use this chip for RF communication. Instead this new implementation draws inspiration from the efforts of the Traquino community mostly using the rp2040 processor. The TinyGo implementation is based on the patterns and code in the drivers repo for other i2c devices. It also includes some basic unit tests which are not comprehensive but at least provide some coverage. Signed-off-by: deadprogram <ron@hybridgroup.com>
89 lines
2.4 KiB
Go
89 lines
2.4 KiB
Go
package main
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import (
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"machine"
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"time"
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"tinygo.org/x/drivers/si5351"
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)
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// Simple demo of the SI5351 clock generator.
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// This is like the Arduino library example:
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// https://github.com/adafruit/Adafruit_Si5351_Library/blob/master/examples/si5351/si5351.ino
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// Which will configure the chip with:
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// - PLL A at 900mhz
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// - PLL B at 616.66667mhz
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// - Clock 0 at 112.5mhz, using PLL A as a source divided by 8
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// - Clock 1 at 13.5531mhz, using PLL B as a source divided by 45.5
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// - Clock 2 at 10.76khz, using PLL B as a source divided by 900 and further divided with an R divider of 64.
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func main() {
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time.Sleep(5 * time.Second)
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println("Si5351 Clockgen Test")
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println()
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// Configure I2C bus
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machine.I2C0.Configure(machine.I2CConfig{})
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// Create driver instance
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clockgen := si5351.New(machine.I2C0)
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// Initialize device
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cnf := si5351.Config{
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Capacitance: si5351.CrystalLoad10PF,
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}
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if err := clockgen.Configure(cnf); err != nil {
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println("Failed to configure Si5351:", err.Error())
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return
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}
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println("Si5351 configured")
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// Now configure the clock outputs.
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clockgen.SetFrequency(si5351.Clock0, 112_500_000)
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println("Clock 0: 112.5mhz")
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// Next configure clock 1 for 13.5531mhz (616.6667mhz / 45.5).
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// This uses fractional division.
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clockgen.SetFrequency(si5351.Clock1, 13_553_125)
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println("Clock 1: 13.5531mhz")
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// Finally configure clock 2 to output of 10.706khz.
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clockgen.SetFrequency(si5351.Clock2, 10_706)
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println("Clock 2: 10.706khz")
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// After configuring the clocks enable the outputs.
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clockgen.EnableOutput(si5351.Clock0, true)
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clockgen.EnableOutput(si5351.Clock1, true)
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clockgen.EnableOutput(si5351.Clock2, true)
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println("All outputs enabled")
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time.Sleep(time.Second)
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clockgen.EnableOutput(si5351.Clock0, false)
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clockgen.EnableOutput(si5351.Clock1, false)
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clockgen.EnableOutput(si5351.Clock2, false)
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println("All outputs disabled for 5 seconds")
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time.Sleep(5 * time.Second)
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// Now turn clock outputs on and off repeatedly
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on := false
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for {
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if on {
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println("Setting clock outputs off")
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clockgen.EnableOutput(si5351.Clock0, false)
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clockgen.EnableOutput(si5351.Clock1, false)
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clockgen.EnableOutput(si5351.Clock2, false)
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on = false
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} else {
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println("Setting clock outputs on")
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clockgen.EnableOutput(si5351.Clock0, true)
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clockgen.EnableOutput(si5351.Clock1, true)
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clockgen.EnableOutput(si5351.Clock2, true)
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on = true
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}
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time.Sleep(1 * time.Second)
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}
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}
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