bk1080.rs

        const INITREGS: &[u16] = &[
            0x0008, // 0x00 (r) : unknown 0
            0x1080, // 0x01 (r) : chip id
            // 0x02 (rw): power
            // [   15] DSMUTE = 0 (enable soft mute)
            // [   14] MUTE = 0 (disable mute)
            // [   13] MONO = 0 (stereo)
            // [   12] CKSEL = 0 (external clock)
            // [   11] reserved = 0
            // [   10] SKMODE = 0 (wrap)
            // [    9] SEEKUP = 1 (seek up)
            // [    8] SEEK = 0 (disabled)
            // [    7] reserved = 0
            // [    6] DISABLE = 0
            // [ 5: 1] reserved = 0
            // [    0] ENABLE = 1
            0x0201,
            // 0x03 (rw): channel
            // [   15] TUNE = 0 (disable)
            // [14:10] reserved = 0
            // [ 9: 0] CHAN = 0
            0x0000,
            // 0x04 (rw): system 1
            // [   15] reserved = 0
            // [   14]: STCIEN = 1 (enable interrupt)
            // [   13]: DEBPS = 0 (enable de-emphasis filter)
            // [   12]: reserved = 0
            // [   11]: DE = 0 (75 us de-emphasis, USA)
            // [   10]: AGCD = 0 (AGC enabled)
            // [ 9: 8]: reserved = 0
            // [ 7: 6]: BLNDADJ = 0b11 (25-43 RSSI dBuV (-6dB) stereo blend)
            // [ 5: 4]: GPIO3 = 0b00 (high impedence)
            // [ 3: 2]: GPIO2 = 0b00 (high impedence)
            // [ 1: 0]: GPIO1 = 0b00 (high impedence)
            0x40C0,
            // 0x05 (rw): system 2
            // [15: 8]: SEEKTH = 0x0a (rssi seek threshold)
            // [ 7: 6]: BAND = 0b00 (87.5 - 108 MHz, USA/Europe)
            // [ 5: 4]: SPACE = 0b01 (100 kHz, Europe/Japan)
            // [ 3: 0]: VOLUME = 0b111 (0dB full scale)
            0x0A1F,
            // 0x06 (rw): system 3
            // [15:14]: SMUTER = 0b00 (fastest soft mute)
            // [13:12]: SMUTEA = 0b00 (16dB soft mute)
            // [11: 8]: reserved = 0
            // [ 7: 4]: SKSNR = 0b0010 (almost all stops while seeking)
            // [ 3: 0]: SKCNT = 0b1110 (almost minimum impulses for seek)
            0x002E,
            // 0x07 (rw): test 1
            // [15: 4]: FREQD = 0x2f, 148Hz "on bit"
            // [ 3: 0]: SNR = 0xf (??)
            0x02FF,
            // 0x08 (rw): test 2
            // [   15]: reserved = 0
            // [14: 0]: reserved = 0x5b11 (should be same as startup)
            0x5B11,
            // 0x09 (rw): boot
            // [15: 0]: boot = 0x0000 (should be same as startup)
            0x0000,
            // 0x0a (r) : rssi
            // [   15]: reserved = 0
            // [   14]: STC = 1 (seek/tune complete)
            // [   13]: SF/BL = 0 (seek successful)
            // [   12]: AFCRL = 0 (AFC not railed, channel valid)
            // [11:10]: reserved = 0b00
            // [    9]: STEN = 1 (stereo indicator on)
            // [    8]: ST = 0 (mono)
            // [ 7: 0]: RSSI = 0x1e (0x00 to 0xff)
            0x411E,
            // 0x0b (r) : read channel
            // [15:14]: reserved = 0b00
            // [13:10]: IMPC = 0b0000
            // [ 9: 0]: READCHAN = 0
            0x0000,
            //
            // the rest are reserved
            //
            0xCE00, // 0x0c (r) : reserved 0, always 0
            0x0000, // 0x0d (r) : reserved 1, always 0
            0x0000, // 0x0e (r) : reserved 2, always 0
            0x1000, // 0x0f (r) : reserved 3, always 0
            //
            // the rest are internal registers
            //
            0x3197, 0x0000, 0x13FF, 0x9852, 0x0000, 0x0000, 0x0008, 0x0000, 0x51E1, 0xA8BC, 0x2645,
            0x00E4, 0x1CD8, 0x3A50, 0xEAE0, 0x3000, 0x0200, 0x0000,
        ];