0e348414f8
radio_init() configures RADIO in NRF_1Mbit proprietary mode: 8-bit length field, 4-byte address (BASE0+PREFIX0), 2-byte CRC-16/CCITT, 0 dBm TX power, channel 20 (2420 MHz). READY->START and END->DISABLE shortcuts let radio_tx() trigger the full ramp-up/TX/disable sequence by writing TASKS_TXEN once, then polling EVENTS_END. main.c sends a fixed 4-byte test frame on every button press. FHSS and AES remain compiled but are not called. New bitfield unions in regs.h: radio_pcnf0_t, radio_pcnf1_t, radio_crccnf_t, radio_shorts_t.
155 lines
5.7 KiB
C
155 lines
5.7 KiB
C
#pragma once
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#include <stdint.h>
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/*
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* Hardware register bitfield unions for nRF52840 peripherals.
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* Layout is guaranteed correct only with arm-none-eabi-gcc (LSB-first bitfields).
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* Bit ranges match nRF52840 Product Specification v1.7.
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*/
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/* GPIOTE */
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/* CONFIG[n]: channel configuration */
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typedef union {
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struct {
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uint32_t MODE : 2; /* [1:0] 0=Disabled 1=Event 3=Task */
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uint32_t : 6; /* [7:2] reserved */
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uint32_t PSEL : 5; /* [12:8] pin number within port */
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uint32_t PORT : 1; /* [13] 0=Port0 1=Port1 */
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uint32_t : 2; /* [15:14] reserved */
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uint32_t POLARITY : 2; /* [17:16] 0=None 1=LoToHi 2=HiToLo 3=Toggle */
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uint32_t : 2; /* [19:18] reserved */
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uint32_t OUTINIT : 1; /* [20] initial output value for Task mode */
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uint32_t : 11; /* [31:21] reserved */
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} bit;
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uint32_t reg;
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} gpiote_config_t;
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#define GPIOTE_MODE_DISABLED 0u
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#define GPIOTE_MODE_EVENT 1u
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#define GPIOTE_MODE_TASK 3u
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#define GPIOTE_POL_NONE 0u
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#define GPIOTE_POL_LOTOHI 1u
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#define GPIOTE_POL_HITOLO 2u
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#define GPIOTE_POL_TOGGLE 3u
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/* INTENSET / INTENCLR: interrupt enable */
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typedef union {
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struct {
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uint32_t IN0 : 1; /* [0] channel 0 input event */
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uint32_t IN1 : 1; /* [1] channel 1 input event */
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uint32_t IN2 : 1; /* [2] */
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uint32_t IN3 : 1; /* [3] */
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uint32_t IN4 : 1; /* [4] */
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uint32_t IN5 : 1; /* [5] */
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uint32_t IN6 : 1; /* [6] */
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uint32_t IN7 : 1; /* [7] */
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uint32_t : 23; /* [30:8] reserved */
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uint32_t PORT : 1; /* [31] PORT event */
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} bit;
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uint32_t reg;
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} gpiote_inten_t;
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/* RADIO */
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/* FREQUENCY: radio channel */
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typedef union {
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struct {
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uint32_t FREQUENCY : 7; /* [6:0] offset from base frequency in MHz */
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uint32_t : 1; /* [7] reserved */
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uint32_t MAP : 1; /* [8] 0: base=2400 MHz 1: base=2360 MHz */
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uint32_t : 23; /* [31:9] reserved */
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} bit;
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uint32_t reg;
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} radio_frequency_t;
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#define RADIO_MAP_DEFAULT 0u /* channel n -> 2400+n MHz */
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#define RADIO_MAP_BLE 1u /* channel n -> 2360+n MHz */
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/* TXPOWER: transmit power */
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typedef union {
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struct {
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int32_t TXPOWER : 8; /* [7:0] signed dBm: +8, +7, +6, +5, +4, +3, +2,
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0, -4, -8, -12, -16, -20, -40 */
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uint32_t : 24; /* [31:8] reserved */
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} bit;
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uint32_t reg;
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} radio_txpower_t;
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/* MODE: radio data rate and modulation */
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typedef union {
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struct {
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uint32_t MODE : 4; /* [3:0] 0=NRF_1Mbit 1=NRF_2Mbit 4=BLE_1Mbit ... */
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uint32_t : 28; /* [31:4] reserved */
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} bit;
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uint32_t reg;
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} radio_mode_t;
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#define RADIO_MODE_NRF_1MBIT 0u
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#define RADIO_MODE_NRF_2MBIT 1u
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#define RADIO_MODE_BLE_1MBIT 4u
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/* PCNF0: packet configuration register 0 */
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typedef union {
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struct {
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uint32_t LFLEN : 4; /* [3:0] length of LENGTH field in bits */
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uint32_t : 4; /* [7:4] reserved */
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uint32_t S0LEN : 1; /* [8] length of S0 field in bytes (0 or 1) */
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uint32_t : 7; /* [15:9] reserved */
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uint32_t S1LEN : 4; /* [19:16] length of S1 field in bits */
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uint32_t S1INCL : 1; /* [20] include S1 field in RAM even if zero length */
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uint32_t : 3; /* [23:21] reserved */
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uint32_t PLEN : 1; /* [24] 0=8-bit preamble 1=16-bit preamble */
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uint32_t : 6; /* [30:25] reserved */
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uint32_t CRCINC : 1; /* [31] include CRC in LENGTH field */
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} bit;
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uint32_t reg;
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} radio_pcnf0_t;
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/* PCNF1: packet configuration register 1 */
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typedef union {
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struct {
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uint32_t MAXLEN : 8; /* [7:0] maximum payload length in bytes */
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uint32_t STATLEN : 8; /* [15:8] static length added to payload */
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uint32_t BALEN : 3; /* [18:16] base address length (2-4 bytes) */
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uint32_t : 5; /* [23:19] reserved */
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uint32_t ENDIAN : 1; /* [24] 0=little-endian 1=big-endian */
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uint32_t WHITEEN : 1; /* [25] 1=enable data whitening */
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uint32_t : 6; /* [31:26] reserved */
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} bit;
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uint32_t reg;
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} radio_pcnf1_t;
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/* CRCCNF: CRC configuration */
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typedef union {
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struct {
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uint32_t LEN : 2; /* [1:0] 0=disabled 1=1 byte 2=2 bytes 3=3 bytes */
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uint32_t : 6; /* [7:2] reserved */
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uint32_t SKIPADDR : 1; /* [8] 1=skip address field in CRC calculation */
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uint32_t : 23; /* [31:9] reserved */
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} bit;
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uint32_t reg;
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} radio_crccnf_t;
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#define RADIO_CRCCNF_LEN_DISABLED 0u
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#define RADIO_CRCCNF_LEN_ONE 1u
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#define RADIO_CRCCNF_LEN_TWO 2u
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#define RADIO_CRCCNF_LEN_THREE 3u
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/* SHORTS: shortcut register */
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typedef union {
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struct {
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uint32_t READY_START : 1; /* [0] READY -> TASKS_START */
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uint32_t END_DISABLE : 1; /* [1] END -> TASKS_DISABLE */
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uint32_t DISABLED_TXEN : 1; /* [2] DISABLED -> TASKS_TXEN */
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uint32_t DISABLED_RXEN : 1; /* [3] DISABLED -> TASKS_RXEN */
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uint32_t ADDRESS_RSSISTART : 1; /* [4] ADDRESS -> TASKS_RSSISTART */
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uint32_t END_START : 1; /* [5] END -> TASKS_START */
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uint32_t ADDRESS_BCSTART : 1; /* [6] ADDRESS -> TASKS_BCSTART */
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uint32_t : 1; /* [7] reserved */
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uint32_t DISABLED_RSSISTOP : 1; /* [8] DISABLED -> TASKS_RSSISTOP */
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uint32_t : 23; /* [31:9] reserved */
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} bit;
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uint32_t reg;
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} radio_shorts_t;
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