vis-spi-out.c File Reference

#include "Hardware.h"
#include "StatusCodes.h"
#include "BiColorLed.h"
#include "Spi.h"
#include "SpiSlave.h"
#include "UartSpi.h"
#include <stdlib.h>
#include "Queue.h"
#include "VisCmd.h"

Go to the source code of this file.

Macros
#define	max_length_of_queue   24
	Maximum size of the Queue's FIFO buffer is 24 bytes.

Functions
static void	setup (void)
static void	loop (void)
static void	setup_IndicatorLEDs (void)
static void	setup_SpiCommunication (void)
static void	setup_DetectorReadout (void)
int	main ()
	ISR (SPI_STC_vect)

Variables
volatile Queue_s *	SpiFifo
	Allocate static memory for the SPI Rx Queue.
volatile uint8_t	spi_rx_buffer [max_length_of_queue]
	Allocate static memory for the Queue's FIFO buffer.

Function Documentation

ISR()

ISR

(

SPI_STC_vect

)

Interrupt when a SPI transfer completes:

• push received byte onto SpiFifo (Queue head advances)
  
• return from interrupt
  
  Interrupt disabled during SpiSlaveTxByte.
  Interrupt enabled all other times.

Definition at line 98 of file vis-spi-out.c.

setup_DetectorReadout()

void setup_DetectorReadout ( void  )

static

Setup control of the ADC and the LIS-770i detector.

• Configure UART module as a SPI Master to the ADC:
  • use a 5MHz clock to pull bits out of ADC
  • pin UartSpi_AdcConv: output, idle LOW
  • see details in UartSpiInit()
• Configure I/O pins to control LIS-770i detector:
  • clock LIS-770i at 50kHz
  • pins Lis_PixSelect and Lis_Rst: output, idle LOW
  • see details in LisInit()
• Set initial exposure time to 1 millisecond.
• Set initial LIS-770i configuration:
  • binning on
  • gain 1x
  • all rows active
  • see LIS-770i cfg byte code definitions in LisConfigs.h
• Program LIS-770i with initial configuration.

Definition at line 137 of file vis-spi-out.c.

setup_IndicatorLEDs()

void setup_IndicatorLEDs ( void  )

static

Initialize PCB indicator LEDs

Definition at line 109 of file vis-spi-out.c.

setup_SpiCommunication()

void setup_SpiCommunication ( void  )

static

Set up SPI hardware module and a FIFO to buffer bytes sent from the SPI master.

• Configure SPI hardware module:
  
  • configure microcontroller as a SPI slave
    
  • pin Spi_DataReady: output, idle HIGH
    
  • pin Spi_Miso: output
    
  • enable interrupt on SPI Serial Transfer Complete (SPI_STC_vect)
    
  • see details in SpiSlaveInit()
    
• Create a FIFO Queue to buffer up to 11 bytes of SPI data:
  
  • see details in Queue_s

Definition at line 117 of file vis-spi-out.c.