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spi: switch default frequency to 4MHz #1447

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Merged
merged 1 commit into from
Oct 18, 2020
Merged

spi: switch default frequency to 4MHz #1447

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2 changes: 1 addition & 1 deletion src/machine/machine_esp32.go
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Original file line number Diff line number Diff line change
Expand Up @@ -310,7 +310,7 @@ type SPIConfig struct {
// Configure and make the SPI peripheral ready to use.
func (spi SPI) Configure(config SPIConfig) error {
if config.Frequency == 0 {
config.Frequency = 1e6 // default to 1MHz
config.Frequency = 4e6 // default to 4MHz
}

// Configure the SPI clock. This assumes a peripheral clock of 80MHz.
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2 changes: 1 addition & 1 deletion src/machine/machine_fe310.go
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Expand Up @@ -123,7 +123,7 @@ func (spi SPI) Configure(config SPIConfig) error {

// set default frequency
if config.Frequency == 0 {
config.Frequency = 4000000
config.Frequency = 4000000 // 4MHz
}

// div = (SPI_CFG(dev)->f_sys / (2 * frequency)) - 1;
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2 changes: 1 addition & 1 deletion src/machine/machine_k210.go
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Expand Up @@ -442,7 +442,7 @@ func (spi SPI) Configure(config SPIConfig) error {

// Set default frequency.
if config.Frequency == 0 {
config.Frequency = 500000
config.Frequency = 4000000 // 4MHz
}

baudr := CPUFrequency() / config.Frequency
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