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@ -83,16 +83,14 @@ void adc_off(void)
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* the unconnected state by averaging several ADC readings.
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*/
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#define NUM_SAMPLES (10)
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#define LOW_THRESHOLD (2 * NUM_SAMPLES)
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#define HIGH_THRESHOLD (1022 * NUM_SAMPLES)
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#define LOW_THRESHOLD (2)
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#define HIGH_THRESHOLD (1022)
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typedef enum {
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PIN_STRAP_HIGH,
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PIN_STRAP_LOW,
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PIN_STRAP_ABSENT,
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} pin_strap_t;
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#define HIGH(x) ((x) > HIGH_THRESHOLD)
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#define LOW(x) ((x) < LOW_THRESHOLD)
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#define ABSENT(x) (((x) >= LOW_THRESHOLD) && ((x) <= HIGH_THRESHOLD))
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pin_strap_t check_pin_strap(uint8_t pin)
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uint32_t check_pin_strap(uint8_t pin)
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{
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int i;
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uint32_t sum = 0;
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@ -101,15 +99,53 @@ pin_strap_t check_pin_strap(uint8_t pin)
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sum += adc_read(pin);
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}
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adc_off();
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if (sum > HIGH_THRESHOLD) {
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return PIN_STRAP_HIGH;
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} else if (sum < LOW_THRESHOLD) {
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return PIN_STRAP_LOW;
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} else {
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return PIN_STRAP_ABSENT;
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}
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return (sum / NUM_SAMPLES);
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}
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/*
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* Starting with r10, HackRF One uses a voltage divider on ADC0_3 to set an
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* analog voltage that indicates the hardware revision. The high five bits of
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* the ADC result are mapped to 32 revisions. HackRF One r8 also fits into this
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* scheme with ADC0_3 tied to VCC.
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*/
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// clang-format off
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static const uint8_t revision_from_adc[32] = {
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BOARD_REV_UNRECOGNIZED,
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BOARD_REV_UNRECOGNIZED,
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BOARD_REV_UNRECOGNIZED,
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BOARD_REV_UNRECOGNIZED,
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BOARD_REV_UNRECOGNIZED,
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BOARD_REV_UNRECOGNIZED,
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BOARD_REV_UNRECOGNIZED,
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BOARD_REV_UNRECOGNIZED,
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BOARD_REV_UNRECOGNIZED,
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BOARD_REV_UNRECOGNIZED,
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BOARD_REV_UNRECOGNIZED,
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BOARD_REV_UNRECOGNIZED,
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BOARD_REV_UNRECOGNIZED,
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BOARD_REV_UNRECOGNIZED,
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BOARD_REV_UNRECOGNIZED,
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BOARD_REV_UNRECOGNIZED,
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BOARD_REV_UNRECOGNIZED,
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BOARD_REV_UNRECOGNIZED,
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BOARD_REV_UNRECOGNIZED,
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BOARD_REV_UNRECOGNIZED,
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BOARD_REV_UNRECOGNIZED,
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BOARD_REV_UNRECOGNIZED,
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BOARD_REV_UNRECOGNIZED,
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BOARD_REV_UNRECOGNIZED,
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BOARD_REV_UNRECOGNIZED,
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BOARD_REV_UNRECOGNIZED,
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BOARD_REV_UNRECOGNIZED,
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BOARD_REV_UNRECOGNIZED,
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BOARD_REV_UNRECOGNIZED,
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BOARD_REV_UNRECOGNIZED,
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BOARD_REV_HACKRF1_R10,
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BOARD_REV_HACKRF1_R8
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};
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// clang-format on
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void detect_hardware_platform(void)
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{
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uint8_t detected_resistors = 0;
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@ -177,34 +213,31 @@ void detect_hardware_platform(void)
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halt_and_flash(1000000);
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}
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pin_strap_t adc0_3 = check_pin_strap(3);
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pin_strap_t adc0_4 = check_pin_strap(4);
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pin_strap_t adc0_7 = check_pin_strap(7);
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uint32_t adc0_3 = check_pin_strap(3);
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uint32_t adc0_4 = check_pin_strap(4);
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uint32_t adc0_7 = check_pin_strap(7);
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if ((adc0_3 == PIN_STRAP_ABSENT) && (adc0_4 == PIN_STRAP_ABSENT) &&
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(adc0_7 == PIN_STRAP_ABSENT) && (platform == BOARD_ID_HACKRF1_OG)) {
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revision = BOARD_REV_HACKRF1_OLD;
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} else if (
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(adc0_3 == PIN_STRAP_HIGH) && (adc0_4 == PIN_STRAP_HIGH) &&
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(platform == BOARD_ID_HACKRF1_OG)) {
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revision = BOARD_REV_HACKRF1_R6;
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} else if (
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(adc0_3 == PIN_STRAP_LOW) && (adc0_4 == PIN_STRAP_HIGH) &&
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(platform == BOARD_ID_HACKRF1_OG)) {
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revision = BOARD_REV_HACKRF1_R7;
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} else if (
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(adc0_3 == PIN_STRAP_HIGH) && (adc0_4 == PIN_STRAP_LOW) &&
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(platform == BOARD_ID_HACKRF1_OG)) {
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revision = BOARD_REV_HACKRF1_R8;
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} else if (
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(adc0_3 == PIN_STRAP_LOW) && (adc0_4 == PIN_STRAP_LOW) &&
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(platform == BOARD_ID_HACKRF1_R9)) {
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revision = BOARD_REV_HACKRF1_R9;
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} else {
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revision = BOARD_REV_UNRECOGNIZED;
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if (platform == BOARD_ID_HACKRF1_OG) {
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if (ABSENT(adc0_3) && ABSENT(adc0_4) && ABSENT(adc0_7)) {
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revision = BOARD_REV_HACKRF1_OLD;
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} else if (HIGH(adc0_3) && HIGH(adc0_4)) {
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revision = BOARD_REV_HACKRF1_R6;
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} else if (LOW(adc0_3) && HIGH(adc0_4)) {
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revision = BOARD_REV_HACKRF1_R7;
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} else if (LOW(adc0_4)) {
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revision = revision_from_adc[adc0_3 >> 5];
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} else {
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revision = BOARD_REV_UNRECOGNIZED;
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}
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} else if (platform == BOARD_ID_HACKRF1_R9) {
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if (LOW(adc0_3) && LOW(adc0_4)) {
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revision = BOARD_REV_HACKRF1_R9;
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} else {
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revision = BOARD_REV_UNRECOGNIZED;
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}
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}
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if ((revision > BOARD_REV_HACKRF1_OLD) && (adc0_7 == PIN_STRAP_LOW)) {
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if ((revision > BOARD_REV_HACKRF1_OLD) && LOW(adc0_7)) {
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revision |= BOARD_REV_GSG;
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}
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}
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