thebears
bbdcc1e623
- main.c: file-header comment describing the hardware and operation, logic split into named phases (sleep_until_interrupt, wake_peripheral_rails, take_counts_snapshot, send_wheel_counts_report, handle_minute_alarm, init_all_hardware); shared state renamed to say what it is and made static. - rfm69.c: reorganized into six labeled sections; cond_1/2/3 and hash scratch globals replaced by a reply_acknowledges() helper with clear locals; packet layout and every init register write documented. - LOG() macro (compiled out when DO_UART is off) replaces the #if DO_UART blocks that obscured the logic. - Drivers: file-header comments; named RTC_REG_*/RTC_ALM_MASK_BIT constants; EEPROM spool scheme documented; ADC_CHANNEL_BANDGAP named; repeated pin if/else helpers collapsed to SET_PIN_TO(). - Removed unused globals/buffers and commented-out code; ran clang-format with the project style. Register writes and radio protocol are byte-identical. Builds clean under -Wall -Wextra on gnu17 and c23; flash 13028 -> 12830 B, static RAM 1038 -> 999 B. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01YVJKatfeMJjAmuH9KYiLuv
59 lines
1.6 KiB
C
59 lines
1.6 KiB
C
/*
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* File: max31329.h
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* Author: thebears
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*
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* Created on December 18, 2024, 1:24 PM
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*/
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#include "defines.h"
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#include "i2c.h"
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#include "rfm69.h"
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#include "st25dv.h"
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#include "uart.h"
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#ifndef MAX31329_H
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#define MAX31329_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define I2C_ADDR 0x68
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// MAX31329 register map (the subset this driver touches)
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#define RTC_REG_STATUS 0x00 // Reading clears the alarm flags / releases INTB
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#define RTC_REG_INT_EN 0x01
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#define RTC_REG_CONFIG2 0x04
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#define RTC_REG_SECONDS 0x06 // Start of the 7-byte BCD time block
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#define RTC_REG_ALM2_MIN 0x13 // Start of the 3-byte alarm-2 block
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#define RTC_INT_EN_A2IE 0b00000010 // Alarm-2 interrupt enable
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#define RTC_ALM_MASK_BIT 0x80 // "Don't match this field" bit in each alarm register
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#define DEC2BCD(n) ((n) + (6 * ((n) / 10)))
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#define BCD2DEC(n) ((n) - (6 * ((n) >> 4)))
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// time_struct.Year is years since 2000, which is exactly what the RTC's 2-digit
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// year register holds -- no offset. (The old +/-30 round-tripped but stored the
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// wrong year in the RTC and overflowed BCD above 2069.)
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#define tmYearToY2k(Y) (Y)
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#define y2kYearToTm(Y) (Y)
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uint8_t rtc_enable_interrupts(void);
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uint8_t rtc_set_per_minute_alarm(void);
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uint8_t rtc_read_time_array(uint8_t* data);
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time_struct rtc_read_time(void);
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uint8_t rtc_write_time(time_struct tm);
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uint8_t rtc_set_alarm_config(void);
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uint8_t rtc_read_status_register(void);
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uint8_t rtc_read_interrupt_register(void);
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uint8_t rtc_read_register(uint8_t addr);
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void uart_print_rtc_time(time_struct td);
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RTC_RFM69_STATUS set_time_from_rfm69(identifier_results id_data);
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#ifdef __cplusplus
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}
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#endif
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#endif /* MAX31329_H */
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