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deadprogram
86 lines
2.0 KiB
Go
86 lines
2.0 KiB
Go
//go:build stm32wlx
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package sx126x
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import (
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"device/stm32"
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"runtime/interrupt"
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)
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// STM32RadioControl helps implement the RadioController interface
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type STM32RadioControl struct {
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irqHandler func()
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}
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// SetNss sets the NSS line aka chip select for SPI.
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func (rc *STM32RadioControl) SetNss(state bool) error {
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if state {
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stm32.PWR.SUBGHZSPICR.SetBits(stm32.PWR_SUBGHZSPICR_NSS)
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} else {
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stm32.PWR.SUBGHZSPICR.ClearBits(stm32.PWR_SUBGHZSPICR_NSS)
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}
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return nil
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}
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// WaitWhileBusy wait until the radio is no longer busy
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func (rc *STM32RadioControl) WaitWhileBusy() error {
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count := 100
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var rfbusyms, rfbusys bool
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for count > 0 {
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rfbusyms = stm32.PWR.SR2.HasBits(stm32.PWR_SR2_RFBUSYMS)
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rfbusys = stm32.PWR.SR2.HasBits(stm32.PWR_SR2_RFBUSYS)
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if !(rfbusyms && rfbusys) {
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return nil
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}
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count--
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}
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return errWaitWhileBusyTimeout
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}
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// init() configures whatever needed for sx126x radio control
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func init() {
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// Enable APB3 Periph clock and delay
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stm32.RCC.APB3ENR.SetBits(stm32.RCC_APB3ENR_SUBGHZSPIEN)
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_ = stm32.RCC.APB3ENR.Get()
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// Disable radio reset and wait it's ready
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stm32.RCC.CSR.ClearBits(stm32.RCC_CSR_RFRST)
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for stm32.RCC.CSR.HasBits(stm32.RCC_CSR_RFRSTF) {
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}
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// Set NSS line low
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stm32.PWR.SUBGHZSPICR.SetBits(stm32.PWR_SUBGHZSPICR_NSS)
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// Enable radio busy wakeup from Standby for CPU
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stm32.PWR.CR3.SetBits(stm32.PWR_CR3_EWRFBUSY)
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// Clear busy flag
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stm32.PWR.SCR.Set(stm32.PWR_SCR_CWRFBUSYF)
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// Enable SUBGHZ Spi
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// - /8 Prescaler
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// - Software Slave Management (NSS)
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// - FIFO Threshold and 8bit size
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stm32.SPI3.CR1.ClearBits(stm32.SPI_CR1_SPE)
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stm32.SPI3.CR1.Set(stm32.SPI_CR1_MSTR | stm32.SPI_CR1_SSI | (0b010 << 3) | stm32.SPI_CR1_SSM)
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stm32.SPI3.CR2.Set(stm32.SPI_CR2_FRXTH | (0b111 << 8))
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stm32.SPI3.CR1.SetBits(stm32.SPI_CR1_SPE)
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}
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func (rc *STM32RadioControl) SetupInterrupts(handler func()) error {
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irqHandler = handler
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intr := interrupt.New(stm32.IRQ_Radio_IRQ_Busy, handleInterrupt)
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intr.Enable()
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return nil
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}
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var irqHandler func()
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func handleInterrupt(interrupt.Interrupt) {
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irqHandler()
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}
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