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https://github.com/slsdetectorgroup/slsDetectorPackage.git
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241 lines
9.7 KiB
C
241 lines
9.7 KiB
C
#include "AD7689.h"
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#include "blackfin.h"
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#include "clogger.h"
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#include "common.h"
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#include "commonServerFunctions.h" // blackfin.h, ansi.h
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/* AD7689 ADC DEFINES */
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/** Read back CFG Register */
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#define AD7689_CFG_RB_OFST (0)
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#define AD7689_CFG_RB_MSK (0x00000001 << AD7689_CFG_RB_OFST)
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/** Channel sequencer */
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#define AD7689_CFG_SEQ_OFST (1)
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#define AD7689_CFG_SEQ_MSK (0x00000003 << AD7689_CFG_SEQ_OFST)
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#define AD7689_CFG_SEQ_DSBLE_VAL \
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((0x0 << AD7689_CFG_SEQ_OFST) & AD7689_CFG_SEQ_MSK)
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#define AD7689_CFG_SEQ_UPDTE_DRNG_SQNCE_VAL \
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((0x1 << AD7689_CFG_SEQ_OFST) & AD7689_CFG_SEQ_MSK)
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#define AD7689_CFG_SEQ_SCN_WTH_TMP_VAL \
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((0x2 << AD7689_CFG_SEQ_OFST) & AD7689_CFG_SEQ_MSK)
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#define AD7689_CFG_SEQ_SCN_WTHT_TMP_VAL \
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((0x3 << AD7689_CFG_SEQ_OFST) & AD7689_CFG_SEQ_MSK)
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/** Reference/ buffer selection */
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#define AD7689_CFG_REF_OFST (3)
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#define AD7689_CFG_REF_MSK (0x00000007 << AD7689_CFG_REF_OFST)
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/** Internal reference. REF = 2.5V buffered output. Temperature sensor enabled.
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*/
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#define AD7689_CFG_REF_INT_2500MV_VAL \
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((0x0 << AD7689_CFG_REF_OFST) & AD7689_CFG_REF_OFST)
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/** Internal reference. REF = 4.096V buffered output. Temperature sensor
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* enabled. */
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#define AD7689_CFG_REF_INT_4096MV_VAL \
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((0x1 << AD7689_CFG_REF_OFST) & AD7689_CFG_REF_MSK)
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/** External reference. Temperature sensor enabled. Internal buffer disabled. */
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#define AD7689_CFG_REF_EXT_TMP_VAL \
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((0x2 << AD7689_CFG_REF_OFST) & AD7689_CFG_REF_MSK)
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/** External reference. Temperature sensor enabled. Internal buffer enabled. */
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#define AD7689_CFG_REF_EXT_TMP_INTBUF_VAL \
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((0x3 << AD7689_CFG_REF_OFST) & AD7689_CFG_REF_MSK)
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/** External reference. Temperature sensor disabled. Internal buffer disabled.
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*/
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#define AD7689_CFG_REF_EXT_VAL \
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((0x6 << AD7689_CFG_REF_OFST) & AD7689_CFG_REF_MSK)
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/** External reference. Temperature sensor disabled. Internal buffer enabled. */
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#define AD7689_CFG_REF_EXT_INTBUF_VAL \
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((0x7 << AD7689_CFG_REF_OFST) & AD7689_CFG_REF_MSK)
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/** bandwidth of low pass filter */
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#define AD7689_CFG_BW_OFST (6)
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#define AD7689_CFG_BW_MSK (0x00000001 << AD7689_CFG_REF_OFST)
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#define AD7689_CFG_BW_ONE_FOURTH_VAL \
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((0x0 << AD7689_CFG_BW_OFST) & AD7689_CFG_BW_MSK)
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#define AD7689_CFG_BW_FULL_VAL ((0x1 << AD7689_CFG_BW_OFST) & AD7689_CFG_BW_MSK)
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/** input channel selection IN0 - IN7 */
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#define AD7689_CFG_IN_OFST (7)
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#define AD7689_CFG_IN_MSK (0x00000007 << AD7689_CFG_IN_OFST)
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/** input channel configuration */
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#define AD7689_CFG_INCC_OFST (10)
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#define AD7689_CFG_INCC_MSK (0x00000007 << AD7689_CFG_INCC_OFST)
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#define AD7689_CFG_INCC_BPLR_DFFRNTL_PRS_VAL \
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((0x0 << AD7689_CFG_INCC_OFST) & AD7689_CFG_INCC_MSK)
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#define AD7689_CFG_INCC_BPLR_IN_COM_VAL \
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((0x2 << AD7689_CFG_INCC_OFST) & AD7689_CFG_INCC_MSK)
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#define AD7689_CFG_INCC_TMP_VAL \
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((0x3 << AD7689_CFG_INCC_OFST) & AD7689_CFG_INCC_MSK)
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#define AD7689_CFG_INCC_UNPLR_DFFRNTL_PRS_VAL \
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((0x4 << AD7689_CFG_INCC_OFST) & AD7689_CFG_INCC_MSK)
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#define AD7689_CFG_INCC_UNPLR_IN_COM_VAL \
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((0x6 << AD7689_CFG_INCC_OFST) & AD7689_CFG_INCC_MSK)
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#define AD7689_CFG_INCC_UNPLR_IN_GND_VAL \
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((0x7 << AD7689_CFG_INCC_OFST) & AD7689_CFG_INCC_MSK)
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/** configuration update */
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#define AD7689_CFG_CFG_OFST (13)
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#define AD7689_CFG_CFG_MSK (0x00000001 << AD7689_CFG_CFG_OFST)
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#define AD7689_CFG_CFG_NO_UPDATE_VAL \
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((0x0 << AD7689_CFG_CFG_OFST) & AD7689_CFG_CFG_MSK)
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#define AD7689_CFG_CFG_OVRWRTE_VAL \
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((0x1 << AD7689_CFG_CFG_OFST) & AD7689_CFG_CFG_MSK)
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#define AD7689_ADC_CFG_NUMBITS (14)
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#define AD7689_ADC_DATA_NUMBITS (16)
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#define AD7689_NUM_CHANNELS (8)
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#define AD7689_NUM_INVALID_CONVERSIONS (3)
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#define AD7689_INT_REF_MAX_MV \
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(2500) // chosen using reference buffer selection in config reg
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#define AD7689_INT_REF_MIN_MV (0)
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#define AD7689_INT_REF_MAX_UV (2500 * 1000)
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#define AD7689_INT_REF_MIN_UV (0)
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#define AD7689_INT_MAX_STEPS (0xFFFF + 1)
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#define AD7689_TMP_C_FOR_1_MV (25.00 / 283.00)
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// Definitions from the fpga
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uint32_t AD7689_Reg = 0x0;
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uint32_t AD7689_ROReg = 0x0;
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uint32_t AD7689_CnvMask = 0x0;
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uint32_t AD7689_ClkMask = 0x0;
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uint32_t AD7689_DigMask = 0x0;
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int AD7689_DigOffset = 0x0;
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void AD7689_SetDefines(uint32_t reg, uint32_t roreg, uint32_t cmsk,
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uint32_t clkmsk, uint32_t dmsk, int dofst) {
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LOG(logDEBUG, ("AD7689: reg:0x%x roreg:0x%x cmsk:0x%x clkmsk:0x%x "
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"dmsk:0x%x dofst:%d\n",
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reg, roreg, cmsk, clkmsk, dmsk, dofst));
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AD7689_Reg = reg;
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AD7689_ROReg = roreg;
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AD7689_CnvMask = cmsk;
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AD7689_ClkMask = clkmsk;
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AD7689_DigMask = dmsk;
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AD7689_DigOffset = dofst;
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}
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void AD7689_Disable() {
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bus_w(AD7689_Reg, (bus_r(AD7689_Reg) & ~(AD7689_CnvMask) & ~AD7689_ClkMask &
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~(AD7689_DigMask)));
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}
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void AD7689_Set(uint32_t codata) {
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LOG(logINFO,
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("\tSetting ADC SPI Register. Writing 0x%08x to Config Reg\n", codata));
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serializeToSPI(AD7689_Reg, codata, AD7689_CnvMask, AD7689_ADC_CFG_NUMBITS,
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AD7689_ClkMask, AD7689_DigMask, AD7689_DigOffset, 1);
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}
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uint16_t AD7689_Get() {
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LOG(logINFO, ("\tGetting ADC SPI Register.\n"));
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return (uint16_t)serializeFromSPI(AD7689_Reg, AD7689_CnvMask,
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AD7689_ADC_DATA_NUMBITS, AD7689_ClkMask,
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AD7689_DigMask, AD7689_ROReg, 1);
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}
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int AD7689_GetTemperature() {
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AD7689_Set(
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// read back
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AD7689_CFG_RB_MSK |
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// disable sequencer (different from config)
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AD7689_CFG_SEQ_DSBLE_VAL |
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// Internal reference. REF = 2.5V buffered output. Temperature sensor
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// enabled.
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AD7689_CFG_REF_INT_2500MV_VAL |
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// full bandwidth of low pass filter
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AD7689_CFG_BW_FULL_VAL |
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// all channel (different from config)
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AD7689_CFG_IN_MSK |
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// temperature sensor (different from config)
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AD7689_CFG_INCC_TMP_VAL |
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// overwrite configuration
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AD7689_CFG_CFG_OVRWRTE_VAL);
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int regval = AD7689_Get();
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// value in mV FIXME: page 17? reference voltage temperature coefficient or
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// t do with -40 to 85 °C
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int retval = 0;
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ConvertToDifferentRange(0, AD7689_INT_MAX_STEPS, AD7689_INT_REF_MIN_MV,
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AD7689_INT_REF_MAX_MV, regval, &retval);
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LOG(logDEBUG1, ("voltage read for temp: %d mV\n", retval));
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// value in °C
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double tempValue = AD7689_TMP_C_FOR_1_MV * (double)retval;
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LOG(logINFO, ("\ttemp read : %f °C (%d unit)\n", tempValue, regval));
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return tempValue;
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}
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int AD7689_GetChannel(int ichan) {
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// filter channels val
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if (ichan < 0 || ichan >= AD7689_NUM_CHANNELS) {
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LOG(logERROR, ("Cannot get slow adc channel. "
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"%d out of bounds (0 to %d)\n",
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ichan, AD7689_NUM_CHANNELS - 1));
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return -1;
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}
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AD7689_Set(
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// read back
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AD7689_CFG_RB_MSK |
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// disable sequencer (different from config)
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AD7689_CFG_SEQ_DSBLE_VAL |
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// Internal reference. REF = 2.5V buffered output. Temperature sensor
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// enabled.
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AD7689_CFG_REF_INT_2500MV_VAL |
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// full bandwidth of low pass filter
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AD7689_CFG_BW_FULL_VAL |
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// specific channel (different from config)
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((ichan << AD7689_CFG_IN_OFST) & AD7689_CFG_IN_MSK) |
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// input channel configuration (unipolar. inx to gnd)
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AD7689_CFG_INCC_UNPLR_IN_GND_VAL |
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// overwrite configuration
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AD7689_CFG_CFG_OVRWRTE_VAL);
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int regval = AD7689_Get();
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// value in uV
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int retval = ((double)(regval - 0) *
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(double)(AD7689_INT_REF_MAX_UV - AD7689_INT_REF_MIN_UV)) /
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(double)(AD7689_INT_MAX_STEPS - 0) +
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AD7689_INT_REF_MIN_UV;
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/*ConvertToDifferentRange(0, AD7689_INT_MAX_STEPS,
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AD7689_INT_REF_MIN_MV, AD7689_INT_REF_MAX_MV,
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regval, &retval);*/
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LOG(logINFO, ("\tvoltage read for chan %d: %d uV (regVal: %d)\n", ichan,
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retval, regval));
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return retval;
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}
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void AD7689_Configure() {
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LOG(logINFOBLUE, ("Configuring AD7689 (Slow ADCs): \n"));
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// from power up, 3 invalid conversions
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LOG(logINFO,
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("\tConfiguring %d x due to invalid conversions from power up\n",
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AD7689_NUM_INVALID_CONVERSIONS));
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for (int i = 0; i < AD7689_NUM_INVALID_CONVERSIONS; ++i) {
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AD7689_Set(
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// read back
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AD7689_CFG_RB_MSK |
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// scan sequence IN0-IN7 then temperature sensor
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AD7689_CFG_SEQ_SCN_WTH_TMP_VAL |
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// Internal reference. REF = 2.5V buffered output. Temperature
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// sensor enabled.
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AD7689_CFG_REF_INT_2500MV_VAL |
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// full bandwidth of low pass filter
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AD7689_CFG_BW_FULL_VAL |
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// scan upto channel 7
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AD7689_CFG_IN_MSK |
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// input channel configuration (unipolar. inx to gnd)
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AD7689_CFG_INCC_UNPLR_IN_GND_VAL |
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// overwrite configuration
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AD7689_CFG_CFG_OVRWRTE_VAL);
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}
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}
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