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move nRF52 ADC methods to common machine file

pull/1611/head
ardnew 4 years ago
committed by deadprogram
parent
7842e6940d
commit
5279bebf57
3 changed files with 1 additions and 235 deletions
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  1. 117
      src/machine/machine_nrf52.go
  2. 117
      src/machine/machine_nrf52840.go
  3. 2
      src/machine/machine_nrf528xx.go

117
src/machine/machine_nrf52.go
View File

@ -4,7 +4,6 @@ package machine
import (
"device/nrf"
"unsafe"
)
// Hardware pins
@ -62,122 +61,6 @@ func (i2c I2C) setPins(scl, sda Pin) {
i2c.Bus.PSELSDA.Set(uint32(sda))
}
// SPI
func (spi SPI) setPins(sck, sdo, sdi Pin) {
if sck == 0 {
sck = SPI0_SCK_PIN
}
if sdo == 0 {
sdo = SPI0_SDO_PIN
}
if sdi == 0 {
sdi = SPI0_SDI_PIN
}
spi.Bus.PSEL.SCK.Set(uint32(sck))
spi.Bus.PSEL.MOSI.Set(uint32(sdo))
spi.Bus.PSEL.MISO.Set(uint32(sdi))
}
// InitADC initializes the registers needed for ADC.
func InitADC() {
return // no specific setup on nrf52 machine.
}
// Configure configures an ADC pin to be able to read analog data.
func (a ADC) Configure(ADCConfig) {
return // no pin specific setup on nrf52 machine.
}
// Get returns the current value of a ADC pin in the range 0..0xffff.
func (a ADC) Get() uint16 {
var pwmPin uint32
var value int16
switch a.Pin {
case 2:
pwmPin = nrf.SAADC_CH_PSELP_PSELP_AnalogInput0
case 3:
pwmPin = nrf.SAADC_CH_PSELP_PSELP_AnalogInput1
case 4:
pwmPin = nrf.SAADC_CH_PSELP_PSELP_AnalogInput2
case 5:
pwmPin = nrf.SAADC_CH_PSELP_PSELP_AnalogInput3
case 28:
pwmPin = nrf.SAADC_CH_PSELP_PSELP_AnalogInput4
case 29:
pwmPin = nrf.SAADC_CH_PSELP_PSELP_AnalogInput5
case 30:
pwmPin = nrf.SAADC_CH_PSELP_PSELP_AnalogInput6
case 31:
pwmPin = nrf.SAADC_CH_PSELP_PSELP_AnalogInput7
default:
return 0
}
nrf.SAADC.RESOLUTION.Set(nrf.SAADC_RESOLUTION_VAL_12bit)
// Enable ADC.
nrf.SAADC.ENABLE.Set(nrf.SAADC_ENABLE_ENABLE_Enabled << nrf.SAADC_ENABLE_ENABLE_Pos)
for i := 0; i < 8; i++ {
nrf.SAADC.CH[i].PSELN.Set(nrf.SAADC_CH_PSELP_PSELP_NC)
nrf.SAADC.CH[i].PSELP.Set(nrf.SAADC_CH_PSELP_PSELP_NC)
}
// Configure ADC.
nrf.SAADC.CH[0].CONFIG.Set(((nrf.SAADC_CH_CONFIG_RESP_Bypass << nrf.SAADC_CH_CONFIG_RESP_Pos) & nrf.SAADC_CH_CONFIG_RESP_Msk) |
((nrf.SAADC_CH_CONFIG_RESP_Bypass << nrf.SAADC_CH_CONFIG_RESN_Pos) & nrf.SAADC_CH_CONFIG_RESN_Msk) |
((nrf.SAADC_CH_CONFIG_GAIN_Gain1_5 << nrf.SAADC_CH_CONFIG_GAIN_Pos) & nrf.SAADC_CH_CONFIG_GAIN_Msk) |
((nrf.SAADC_CH_CONFIG_REFSEL_Internal << nrf.SAADC_CH_CONFIG_REFSEL_Pos) & nrf.SAADC_CH_CONFIG_REFSEL_Msk) |
((nrf.SAADC_CH_CONFIG_TACQ_3us << nrf.SAADC_CH_CONFIG_TACQ_Pos) & nrf.SAADC_CH_CONFIG_TACQ_Msk) |
((nrf.SAADC_CH_CONFIG_MODE_SE << nrf.SAADC_CH_CONFIG_MODE_Pos) & nrf.SAADC_CH_CONFIG_MODE_Msk))
// Set pin to read.
nrf.SAADC.CH[0].PSELN.Set(pwmPin)
nrf.SAADC.CH[0].PSELP.Set(pwmPin)
// Destination for sample result.
nrf.SAADC.RESULT.PTR.Set(uint32(uintptr(unsafe.Pointer(&value))))
nrf.SAADC.RESULT.MAXCNT.Set(1) // One sample
// Start tasks.
nrf.SAADC.TASKS_START.Set(1)
for nrf.SAADC.EVENTS_STARTED.Get() == 0 {
}
nrf.SAADC.EVENTS_STARTED.Set(0x00)
// Start the sample task.
nrf.SAADC.TASKS_SAMPLE.Set(1)
// Wait until the sample task is done.
for nrf.SAADC.EVENTS_END.Get() == 0 {
}
nrf.SAADC.EVENTS_END.Set(0x00)
// Stop the ADC
nrf.SAADC.TASKS_STOP.Set(1)
for nrf.SAADC.EVENTS_STOPPED.Get() == 0 {
}
nrf.SAADC.EVENTS_STOPPED.Set(0)
// Disable the ADC.
nrf.SAADC.ENABLE.Set(nrf.SAADC_ENABLE_ENABLE_Disabled << nrf.SAADC_ENABLE_ENABLE_Pos)
if value < 0 {
value = 0
}
// Return 16-bit result from 12-bit value.
return uint16(value << 4)
}
// PWM
var (
pwmChannelPins = [3]uint32{0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF}

117
src/machine/machine_nrf52840.go
View File

@ -4,7 +4,6 @@ package machine
import (
"device/nrf"
"unsafe"
)
// Hardware pins
@ -78,122 +77,6 @@ func (i2c I2C) setPins(scl, sda Pin) {
i2c.Bus.PSEL.SDA.Set(uint32(sda))
}
// SPI
func (spi SPI) setPins(sck, sdo, sdi Pin) {
if sck == 0 {
sck = SPI0_SCK_PIN
}
if sdo == 0 {
sdo = SPI0_SDO_PIN
}
if sdi == 0 {
sdi = SPI0_SDI_PIN
}
spi.Bus.PSEL.SCK.Set(uint32(sck))
spi.Bus.PSEL.MOSI.Set(uint32(sdo))
spi.Bus.PSEL.MISO.Set(uint32(sdi))
}
// InitADC initializes the registers needed for ADC.
func InitADC() {
return // no specific setup on nrf52840 machine.
}
// Configure configures an ADC pin to be able to read analog data.
func (a ADC) Configure(ADCConfig) {
return // no pin specific setup on nrf52840 machine.
}
// Get returns the current value of a ADC pin in the range 0..0xffff.
func (a ADC) Get() uint16 {
var pwmPin uint32
var value int16
switch a.Pin {
case 2:
pwmPin = nrf.SAADC_CH_PSELP_PSELP_AnalogInput0
case 3:
pwmPin = nrf.SAADC_CH_PSELP_PSELP_AnalogInput1
case 4:
pwmPin = nrf.SAADC_CH_PSELP_PSELP_AnalogInput2
case 5:
pwmPin = nrf.SAADC_CH_PSELP_PSELP_AnalogInput3
case 28:
pwmPin = nrf.SAADC_CH_PSELP_PSELP_AnalogInput4
case 29:
pwmPin = nrf.SAADC_CH_PSELP_PSELP_AnalogInput5
case 30:
pwmPin = nrf.SAADC_CH_PSELP_PSELP_AnalogInput6
case 31:
pwmPin = nrf.SAADC_CH_PSELP_PSELP_AnalogInput7
default:
return 0
}
nrf.SAADC.RESOLUTION.Set(nrf.SAADC_RESOLUTION_VAL_12bit)
// Enable ADC.
nrf.SAADC.ENABLE.Set(nrf.SAADC_ENABLE_ENABLE_Enabled << nrf.SAADC_ENABLE_ENABLE_Pos)
for i := 0; i < 8; i++ {
nrf.SAADC.CH[i].PSELN.Set(nrf.SAADC_CH_PSELP_PSELP_NC)
nrf.SAADC.CH[i].PSELP.Set(nrf.SAADC_CH_PSELP_PSELP_NC)
}
// Configure ADC.
nrf.SAADC.CH[0].CONFIG.Set(((nrf.SAADC_CH_CONFIG_RESP_Bypass << nrf.SAADC_CH_CONFIG_RESP_Pos) & nrf.SAADC_CH_CONFIG_RESP_Msk) |
((nrf.SAADC_CH_CONFIG_RESP_Bypass << nrf.SAADC_CH_CONFIG_RESN_Pos) & nrf.SAADC_CH_CONFIG_RESN_Msk) |
((nrf.SAADC_CH_CONFIG_GAIN_Gain1_5 << nrf.SAADC_CH_CONFIG_GAIN_Pos) & nrf.SAADC_CH_CONFIG_GAIN_Msk) |
((nrf.SAADC_CH_CONFIG_REFSEL_Internal << nrf.SAADC_CH_CONFIG_REFSEL_Pos) & nrf.SAADC_CH_CONFIG_REFSEL_Msk) |
((nrf.SAADC_CH_CONFIG_TACQ_3us << nrf.SAADC_CH_CONFIG_TACQ_Pos) & nrf.SAADC_CH_CONFIG_TACQ_Msk) |
((nrf.SAADC_CH_CONFIG_MODE_SE << nrf.SAADC_CH_CONFIG_MODE_Pos) & nrf.SAADC_CH_CONFIG_MODE_Msk))
// Set pin to read.
nrf.SAADC.CH[0].PSELN.Set(pwmPin)
nrf.SAADC.CH[0].PSELP.Set(pwmPin)
// Destination for sample result.
nrf.SAADC.RESULT.PTR.Set(uint32(uintptr(unsafe.Pointer(&value))))
nrf.SAADC.RESULT.MAXCNT.Set(1) // One sample
// Start tasks.
nrf.SAADC.TASKS_START.Set(1)
for nrf.SAADC.EVENTS_STARTED.Get() == 0 {
}
nrf.SAADC.EVENTS_STARTED.Set(0x00)
// Start the sample task.
nrf.SAADC.TASKS_SAMPLE.Set(1)
// Wait until the sample task is done.
for nrf.SAADC.EVENTS_END.Get() == 0 {
}
nrf.SAADC.EVENTS_END.Set(0x00)
// Stop the ADC
nrf.SAADC.TASKS_STOP.Set(1)
for nrf.SAADC.EVENTS_STOPPED.Get() == 0 {
}
nrf.SAADC.EVENTS_STOPPED.Set(0)
// Disable the ADC.
nrf.SAADC.ENABLE.Set(nrf.SAADC_ENABLE_ENABLE_Disabled << nrf.SAADC_ENABLE_ENABLE_Pos)
if value < 0 {
value = 0
}
// Return 16-bit result from 12-bit value.
return uint16(value << 4)
}
// PWM
var (
pwmChannelPins = [4]uint32{0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF}

2
src/machine/machine_nrf528xx.go
View File

@ -17,7 +17,7 @@ func InitADC() {
}
// Configure configures an ADC pin to be able to read analog data.
func (a ADC) Configure() {
func (a ADC) Configure(ADCConfig) {
return // no pin specific setup on nrf52 machine.
}

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