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atsamd: Add a GET_FUSE() helper macro

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Add a helper macro for accessing the non-volatile factory-calibrated
"fuse" values.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor 2019-02-22 07:31:10 -05:00
parent 5bc47d9416
commit 37797c8128
3 changed files with 19 additions and 26 deletions
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33
src/atsamd/adc.c
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@ -70,12 +70,9 @@ adc_init(void)
// Enable adc clock
enable_pclock(ADC_GCLK_ID, ID_ADC);
// Load calibraiton info
uint32_t v = *((uint32_t*)ADC_FUSES_BIASCAL_ADDR);
uint32_t bias = (v & ADC_FUSES_BIASCAL_Msk) >> ADC_FUSES_BIASCAL_Pos;
v = *((uint32_t*)ADC_FUSES_LINEARITY_0_ADDR);
uint32_t li0 = (v & ADC_FUSES_LINEARITY_0_Msk) >> ADC_FUSES_LINEARITY_0_Pos;
v = *((uint32_t*)ADC_FUSES_LINEARITY_1_ADDR);
uint32_t li5 = (v & ADC_FUSES_LINEARITY_1_Msk) >> ADC_FUSES_LINEARITY_1_Pos;
uint32_t bias = GET_FUSE(ADC_FUSES_BIASCAL);
uint32_t li0 = GET_FUSE(ADC_FUSES_LINEARITY_0);
uint32_t li5 = GET_FUSE(ADC_FUSES_LINEARITY_1);
uint32_t lin = li0 | (li5 << 5);
ADC->CALIB.reg = ADC_CALIB_BIAS_CAL(bias) | ADC_CALIB_LINEARITY_CAL(lin);
@ -92,22 +89,18 @@ adc_init(void)
// Load calibration info
// ADC0
uint32_t v = *((uint32_t*)ADC0_FUSES_BIASREFBUF_ADDR);
uint32_t refbuf = (v & ADC0_FUSES_BIASREFBUF_Msk) >> ADC0_FUSES_BIASREFBUF_Pos;
v = *((uint32_t*)ADC0_FUSES_BIASR2R_ADDR);
uint32_t r2r = (v & ADC0_FUSES_BIASR2R_Msk) >> ADC0_FUSES_BIASR2R_Pos;
v = *((uint32_t*)ADC0_FUSES_BIASCOMP_ADDR);
uint32_t comp = (v & ADC0_FUSES_BIASCOMP_Msk) >> ADC0_FUSES_BIASCOMP_Pos;
ADC0->CALIB.reg = ADC0_FUSES_BIASREFBUF(refbuf) | ADC0_FUSES_BIASR2R(r2r) | ADC0_FUSES_BIASCOMP(comp);
uint32_t refbuf = GET_FUSE(ADC0_FUSES_BIASREFBUF);
uint32_t r2r = GET_FUSE(ADC0_FUSES_BIASR2R);
uint32_t comp = GET_FUSE(ADC0_FUSES_BIASCOMP);
ADC0->CALIB.reg = (ADC0_FUSES_BIASREFBUF(refbuf)
| ADC0_FUSES_BIASR2R(r2r) | ADC0_FUSES_BIASCOMP(comp));
// ADC1
v = *((uint32_t*)ADC1_FUSES_BIASREFBUF_ADDR);
refbuf = (v & ADC1_FUSES_BIASREFBUF_Msk) >> ADC1_FUSES_BIASREFBUF_Pos;
v = *((uint32_t*)ADC1_FUSES_BIASR2R_ADDR);
r2r = (v & ADC1_FUSES_BIASR2R_Msk) >> ADC1_FUSES_BIASR2R_Pos;
v = *((uint32_t*)ADC1_FUSES_BIASCOMP_ADDR);
comp = (v & ADC1_FUSES_BIASCOMP_Msk) >> ADC1_FUSES_BIASCOMP_Pos;
ADC1->CALIB.reg = ADC1_FUSES_BIASREFBUF(refbuf) | ADC1_FUSES_BIASR2R(r2r) | ADC1_FUSES_BIASCOMP(comp);
refbuf = GET_FUSE(ADC1_FUSES_BIASREFBUF);
r2r = GET_FUSE(ADC1_FUSES_BIASR2R);
comp = GET_FUSE(ADC1_FUSES_BIASCOMP);
ADC1->CALIB.reg = (ADC0_FUSES_BIASREFBUF(refbuf)
| ADC0_FUSES_BIASR2R(r2r) | ADC0_FUSES_BIASCOMP(comp));
// Setup and enable
// ADC0