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machine.UART refactor (#3832)

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* add gosched calls to UART

* add UART.flush() stubs for all supported architectures

* add comment un uart.go on flush functionality

* uart.writeByte as base of UART usage

* fix NXP having duplicate WriteByte

* fix writeByte not returning error on some platforms

* add flush method for fe310 device

* check for error in WriteByte call to writeByte
This commit is contained in:
Patricio Whittingslow
2023-07-15 11:24:53 -03:00
committed by GitHub
parent c83f712c17
commit a7b205c26c
14 changed files with 69 additions and 19 deletions
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src/machine/machine_fe310.go
+4 -1
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@@ -111,13 +111,16 @@ func (uart *UART) handleInterrupt(interrupt.Interrupt) {
uart.Receive(c)
}
func (uart *UART) WriteByte(c byte) {
func (uart *UART) writeByte(c byte) error {
for sifive.UART0.TXDATA.Get()&sifive.UART_TXDATA_FULL != 0 {
}
sifive.UART0.TXDATA.Set(uint32(c))
return nil
}
func (uart *UART) flush() {}
// SPI on the FE310. The normal SPI0 is actually a quad-SPI meant for flash, so it is best
// to use SPI1 or SPI2 port for most applications.
type SPI struct {