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Adding code use 12-bit resolution for ADC and to clear previous ADC INPUTCTRL before subsequent read

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This commit is contained in:
BCG
2020-01-05 02:18:43 -05:00
committed by Ron Evans
parent 27fafb7ab5
commit 5f77447e1a
1 changed files with 6 additions and 3 deletions
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src/machine/machine_atsamd51.go
+6 -3
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@@ -321,7 +321,7 @@ func InitADC() {
sam.ADC0.CTRLA.SetBits(sam.ADC_CTRLA_PRESCALER_DIV32 << sam.ADC_CTRLA_PRESCALER_Pos)
// adcs[i]->CTRLB.bit.RESSEL = ADC_CTRLB_RESSEL_10BIT_Val;
sam.ADC0.CTRLB.SetBits(sam.ADC_CTRLB_RESSEL_10BIT << sam.ADC_CTRLB_RESSEL_Pos)
sam.ADC0.CTRLB.SetBits(sam.ADC_CTRLB_RESSEL_12BIT << sam.ADC_CTRLB_RESSEL_Pos)
// wait for sync
for sam.ADC0.SYNCBUSY.HasBits(sam.ADC_SYNCBUSY_CTRLB) {
@@ -351,7 +351,7 @@ func InitADC() {
// same for ADC1, as for ADC0
sam.ADC1.CTRLA.SetBits(sam.ADC_CTRLA_PRESCALER_DIV32 << sam.ADC_CTRLA_PRESCALER_Pos)
sam.ADC1.CTRLB.SetBits(sam.ADC_CTRLB_RESSEL_10BIT << sam.ADC_CTRLB_RESSEL_Pos)
sam.ADC1.CTRLB.SetBits(sam.ADC_CTRLB_RESSEL_12BIT << sam.ADC_CTRLB_RESSEL_Pos)
for sam.ADC1.SYNCBUSY.HasBits(sam.ADC_SYNCBUSY_CTRLB) {
}
sam.ADC1.SAMPCTRL.Set(5)
@@ -389,6 +389,9 @@ func (a ADC) Get() uint16 {
}
// Selection for the positive ADC input channel
bus.INPUTCTRL.ClearBits(sam.ADC_INPUTCTRL_MUXPOS_Msk)
for bus.SYNCBUSY.HasBits(sam.ADC_SYNCBUSY_ENABLE) {
}
bus.INPUTCTRL.SetBits((uint16(ch) & sam.ADC_INPUTCTRL_MUXPOS_Msk) << sam.ADC_INPUTCTRL_MUXPOS_Pos)
for bus.SYNCBUSY.HasBits(sam.ADC_SYNCBUSY_ENABLE) {
}
@@ -404,7 +407,7 @@ func (a ADC) Get() uint16 {
}
// Clear the Data Ready flag
bus.INTFLAG.SetBits(sam.ADC_INTFLAG_RESRDY)
bus.INTFLAG.ClearBits(sam.ADC_INTFLAG_RESRDY)
for bus.SYNCBUSY.HasBits(sam.ADC_SYNCBUSY_ENABLE) {
}