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machine/rp: add Close function to UART to allow for removing all system resources/power usage

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Signed-off-by: deadprogram <ron@hybridgroup.com>
This commit is contained in:
deadprogram
2026-01-13 17:33:37 +01:00
committed by Ron Evans
parent 8bd2233b57
commit 1fe934e8a8
1 changed files with 21 additions and 0 deletions
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src/machine/machine_rp2_uart.go
+21
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@@ -73,6 +73,27 @@ func (uart *UART) Configure(config UARTConfig) error {
return nil
}
// Close the UART and disable its interrupt/power use.
func (uart *UART) Close() error {
uart.Interrupt.Disable()
// Disable UART.
uart.Bus.UARTCR.ClearBits(rp.UART0_UARTCR_UARTEN)
var resetVal uint32
switch {
case uart.Bus == rp.UART0:
resetVal = rp.RESETS_RESET_UART0
case uart.Bus == rp.UART1:
resetVal = rp.RESETS_RESET_UART1
}
// reset UART
resetBlock(resetVal)
return nil
}
// SetBaudRate sets the baudrate to be used for the UART.
func (uart *UART) SetBaudRate(br uint32) {
div := 8 * CPUFrequency() / br