108 lines
3.7 KiB
C
108 lines
3.7 KiB
C
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#ifndef __GLOBAL_H__
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#define __GLOBAL_H__
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#include <stdbool.h>
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#include <stdint.h>
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#include <sys/types.h>
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#include <assert.h>
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#include <string.h>
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/* The IRQ header must be included before stm32_device.h since ST defines a bunch of messy macros there. */
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#include <stm32_irqs.h> /* Header generated from stm32***_startup.s in Makefile */
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#include <stm32f1xx.h>
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#include <core_cm3.h>
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#define DMA_ISR_FLAGS_Pos(channel) (4 * ((channel) - 1))
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#define DMA_ISR_FLAGS_CH(channel) (0xf << DMA_ISR_FLAGS_Pos(channel))
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#define COUNT_OF(x) ((sizeof(x)/sizeof(0[x])) / ((size_t)(!(sizeof(x) % sizeof(0[x])))))
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#define APB1_PRESC (1<<(APBPrescTable[(RCC->CFGR & RCC_CFGR_PPRE1_Msk) >> RCC_CFGR_PPRE1_Pos]))
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#define AHB_PRESC (1<<(AHBPrescTable[(RCC->CFGR & RCC_CFGR_HPRE_Msk) >> RCC_CFGR_HPRE_Pos]))
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#define AFRL(pin, val) ((val) << ((pin)*4))
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#define AFRH(pin, val) ((val) << (((pin)-8)*4))
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#define AF(pin) (2<<(2*(pin)))
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#define OUT(pin) (1<<(2*(pin)))
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#define IN(pin) (0)
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#define ANALOG(pin) (3<<(2*(pin)))
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#define CLEAR(pin) (3<<(2*(pin)))
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#define PULLUP(pin) (1<<(2*pin))
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#define PULLDOWN(pin) (2<<(2*pin))
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#define BSRR_CLEAR(pin) ((1<<pin)<<16)
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#define BSRR_SET(pin) (1<<pin)
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#define BSRR_VALUE(pin, value) ((((!(value))<<pin)<<16) | ((!!(value))<<pin))
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#ifndef SYSTICK_INTERVAL_US
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#define SYSTICK_INTERVAL_US 1000
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#endif /* SYSTICK_INTERVAL_US */
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enum ErrorCode {
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ERR_SUCCESS = 0,
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ERR_TIMEOUT,
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ERR_PHYSICAL_LAYER,
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ERR_FRAMING,
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ERR_PROTOCOL,
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ERR_DMA,
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ERR_BUSY,
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ERR_BUFFER_OVERFLOW,
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ERR_RX_OVERRUN,
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ERR_TX_OVERRUN,
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};
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typedef enum ErrorCode ErrorCode;
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enum board_config {
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BCFG_UNCONFIGURED = 0,
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/* The board assumes one of three configurations depending on connected periphery.
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*
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*/
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BCFG_DISPLAY,
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/* When an I2C 1602 display is connected to the LCD connector on powerup, the board assumes its display
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* configuration. In this configuration, the board scans the buttons connected on the Buttons connector and acts as
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* a peripheral on the RS-485 bus, relaying information between the bus and the HCI peripherals. In addition to the
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* LCD, the board controls three 8-digit 7-segment LED displays connected on the Buttons connector along with the
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* buttons.
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*
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* RS-485 board address: BADDR_DISPLAY
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*/
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BCFG_MOTOR,
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/* When no LCD is connected and the BT0 input on the buttons connector is open, the board assumes its
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* motor configuration. In this configuration, the board controls a motor connected through the Buttons and LCD
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* connectors, and the USB control interface is enabled. The board acts as the host on the RS-485 bus.
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*
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* RS-485 board address: BADDR_MOTOR
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*/
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BCFG_MEAS,
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/* When no LCD is connected and the BT0 input on the buttons connector is tied to ground, the board assumes its
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* senesor configuration. In this configuration, the board periodically. The board acts as a peripheral on the
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* RS-485 bus, relaying measurements on the bus when requested by the host. The board's bus address is set by pins
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* BT1 and BT0 of the buttons connector. Both pins have pullups enabled, and will read zero when tied to ground on
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* the connector. The address is the binary value of {BT2, BT1} added to BADDR_MES_BASE. With both pins open, the
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* address is 11 (decimal), with BT1 tied to ground it is 10 (decimal).
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*
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* RS-485 board address: BADDR_MEAS_BASE + [BT2:1]
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*/
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};
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enum board_addr {
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BADDR_DISPLAY = 1,
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BADDR_MOTOR = 2,
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BADDR_MEAS_BASE = 8,
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};
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void delay_us(int duration_us);
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uint64_t get_sync_time(void);
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extern enum board_config board_config;
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extern volatile uint64_t sys_time_us;
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extern volatile uint64_t sync_time_us;
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#endif /* __GLOBAL_H__ */
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