Register file + I2C target protocol (see bridge.h, flow_regs.h). More...

#include "bridge.h"
#include "flow_regs.h"
#include <string.h>

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Functions
void	bridge_init (void)

void	bridge_set_sensor_ok (uint8_t ok)

void	bridge_add_sample (int16_t dx, int16_t dy, uint8_t squal, uint16_t shutter, uint8_t valid, uint32_t dt_us)
	one motion burst: deltas since the previous burst, dt_us = time between the two bursts; valid = 0 for a sample without surface features

static int16_t	sat16 (int32_t v, uint8_t *ovf)

static void	put16 (uint8_t *p, uint16_t v)

static void	snapshot (uint8_t latch)

void	bridge_i2c_addr_write (void)
	address matched, master writes

void	bridge_i2c_rx (uint8_t b)
	first byte = register pointer

void	bridge_i2c_addr_read (void)
	address matched, master reads: snapshot

uint8_t	bridge_i2c_tx (void)
	next byte to send

void	bridge_i2c_stop (void)

uint8_t	bridge_take_ctrl (void)
	CTRL bits written by the master, cleared.

uint8_t	bridge_reads (void)
	FRAME reads since boot (LED activity), wraps.

Variables
static volatile int32_t	s_dx

static volatile int32_t	s_dy

static volatile uint32_t	s_dt_us

static volatile uint8_t	s_count

static volatile uint8_t	s_squal

static volatile uint8_t	s_status

static volatile uint16_t	s_shutter

static uint8_t	s_ptr

static uint8_t	s_first

static uint8_t	s_wr

static uint8_t	s_img [FLOW_REG_SPACE]

static uint8_t	s_rd

static volatile uint8_t	s_ctrl

static volatile uint8_t	s_reads

Detailed Description

Register file + I2C target protocol (see bridge.h, flow_regs.h).

Definition in file bridge.c.

Function Documentation

◆ bridge_init()

void bridge_init ( void )

Definition at line 19 of file bridge.c.

References s_count, s_ctrl, s_dt_us, s_dx, s_dy, s_first, s_ptr, s_rd, s_reads, s_shutter, s_squal, s_status, and s_wr.

Referenced by main().

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◆ bridge_set_sensor_ok()

void bridge_set_sensor_ok ( uint8_t ok )

Definition at line 26 of file bridge.c.

References FLOW_S_SENSOR_OK, and s_status.

Referenced by main().

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◆ bridge_add_sample()

void bridge_add_sample	(	int16_t	dx,
		int16_t	dy,
		uint8_t	squal,
		uint16_t	shutter,
		uint8_t	valid,
		uint32_t	dt_us
	)

one motion burst: deltas since the previous burst, dt_us = time between the two bursts; valid = 0 for a sample without surface features

Definition at line 32 of file bridge.c.

References FLOW_S_NEW, FLOW_S_REJECTED, s_count, s_dt_us, s_dx, s_dy, s_shutter, s_squal, and s_status.

Referenced by main().

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◆ sat16()

static int16_t sat16	(	int32_t	v,
		uint8_t *	ovf
	)

static

Definition at line 46 of file bridge.c.

Referenced by snapshot().

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◆ put16()

static void put16	(	uint8_t *	p,
		uint16_t	v
	)

static

Definition at line 53 of file bridge.c.

Referenced by snapshot().

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◆ snapshot()

static void snapshot ( uint8_t latch )

static

Definition at line 56 of file bridge.c.

References FLOW_FW_VERSION, FLOW_R_COUNT, FLOW_R_DT, FLOW_R_DX, FLOW_R_DY, FLOW_R_SHUTTER, FLOW_R_SQUAL, FLOW_R_STATUS, FLOW_R_VERSION, FLOW_R_WHO_AM_I, FLOW_S_NEW, FLOW_S_OVERFLOW, FLOW_WHO_AM_I_VAL, put16(), s_count, s_dt_us, s_dx, s_dy, s_img, s_reads, s_shutter, s_squal, s_status, and sat16().

Referenced by bridge_i2c_addr_read().

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◆ bridge_i2c_addr_write()

void bridge_i2c_addr_write ( void )

address matched, master writes

Definition at line 82 of file bridge.c.

References s_first, and s_wr.

Referenced by I2C1_IRQHandler().

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◆ bridge_i2c_rx()

void bridge_i2c_rx ( uint8_t b )

first byte = register pointer

Definition at line 84 of file bridge.c.

References FLOW_R_CTRL, s_ctrl, s_first, s_ptr, and s_wr.

Referenced by I2C1_IRQHandler().

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◆ bridge_i2c_addr_read()

void bridge_i2c_addr_read ( void )

address matched, master reads: snapshot

Definition at line 92 of file bridge.c.

References FLOW_R_FRAME, s_ptr, s_rd, and snapshot().

Referenced by I2C1_IRQHandler().

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◆ bridge_i2c_tx()

uint8_t bridge_i2c_tx ( void )

next byte to send

Definition at line 98 of file bridge.c.

References FLOW_REG_SPACE, s_img, and s_rd.

Referenced by I2C1_IRQHandler().

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◆ bridge_i2c_stop()

void bridge_i2c_stop ( void )

Definition at line 105 of file bridge.c.

References s_first.

Referenced by I2C1_IRQHandler().

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◆ bridge_take_ctrl()

uint8_t bridge_take_ctrl ( void )

CTRL bits written by the master, cleared.

Definition at line 107 of file bridge.c.

References s_ctrl.

Referenced by main().

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◆ bridge_reads()

uint8_t bridge_reads ( void )

FRAME reads since boot (LED activity), wraps.

Definition at line 114 of file bridge.c.

References s_reads.

Referenced by main().

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Variable Documentation

◆ s_dx

volatile int32_t s_dx

static

Definition at line 9 of file bridge.c.

Referenced by bridge_add_sample(), bridge_init(), and snapshot().

◆ s_dy

volatile int32_t s_dy

static

Definition at line 9 of file bridge.c.

Referenced by bridge_add_sample(), bridge_init(), and snapshot().

◆ s_dt_us

volatile uint32_t s_dt_us

static

Definition at line 10 of file bridge.c.

Referenced by bridge_add_sample(), bridge_init(), and snapshot().

◆ s_count

volatile uint8_t s_count

static

Definition at line 11 of file bridge.c.

Referenced by bridge_add_sample(), bridge_init(), and snapshot().

◆ s_squal

volatile uint8_t s_squal

static

Definition at line 11 of file bridge.c.

Referenced by bridge_add_sample(), bridge_init(), and snapshot().

◆ s_status

volatile uint8_t s_status

static

Definition at line 11 of file bridge.c.

Referenced by bridge_add_sample(), bridge_init(), bridge_set_sensor_ok(), and snapshot().

◆ s_shutter

volatile uint16_t s_shutter

static

Definition at line 12 of file bridge.c.

Referenced by bridge_add_sample(), bridge_init(), and snapshot().

◆ s_ptr

uint8_t s_ptr

static

Definition at line 14 of file bridge.c.

Referenced by bridge_i2c_addr_read(), bridge_i2c_rx(), and bridge_init().

◆ s_first

uint8_t s_first

static

Definition at line 14 of file bridge.c.

Referenced by bridge_i2c_addr_write(), bridge_i2c_rx(), bridge_i2c_stop(), and bridge_init().

◆ s_wr

uint8_t s_wr

static

Definition at line 14 of file bridge.c.

Referenced by bridge_i2c_addr_write(), bridge_i2c_rx(), and bridge_init().

◆ s_img

uint8_t s_img[FLOW_REG_SPACE]

static

Definition at line 15 of file bridge.c.

Referenced by bridge_i2c_tx(), and snapshot().

◆ s_rd

uint8_t s_rd

static

Definition at line 16 of file bridge.c.

Referenced by bridge_i2c_addr_read(), bridge_i2c_tx(), and bridge_init().

◆ s_ctrl

volatile uint8_t s_ctrl

static

Definition at line 17 of file bridge.c.

Referenced by bridge_i2c_rx(), bridge_init(), and bridge_take_ctrl().

◆ s_reads

volatile uint8_t s_reads

static

Definition at line 17 of file bridge.c.

Referenced by bridge_init(), bridge_reads(), and snapshot().

Functions

Variables

Detailed Description

Function Documentation

◆ bridge_init()

◆ bridge_set_sensor_ok()

◆ bridge_add_sample()

◆ sat16()

◆ put16()

◆ snapshot()

◆ bridge_i2c_addr_write()

◆ bridge_i2c_rx()

◆ bridge_i2c_addr_read()

◆ bridge_i2c_tx()

◆ bridge_i2c_stop()

◆ bridge_take_ctrl()

◆ bridge_reads()

Variable Documentation

◆ s_dx

◆ s_dy

◆ s_dt_us

◆ s_count

◆ s_squal

◆ s_status

◆ s_shutter

◆ s_ptr

◆ s_first

◆ s_wr

◆ s_img

◆ s_rd

◆ s_ctrl

◆ s_reads