twim_pdca_example.c File Reference

TWIM PDCA Example for SAM.

Copyright (c) 2013-2018 Microchip Technology Inc. and its subsidiaries.

#include <asf.h>
#include <string.h>
#include "conf_example.h"

Macros
#define	PATTERN_TEST   "SAM4L TWIM PDCA Example"
#define	PATTERN_TEST_LENGTH   (sizeof(PATTERN_TEST)/sizeof(uint8_t))
#define	PDCA_PID_TWIM1_RX   6
#define	PDCA_PID_TWIM1_TX   24
#define	PDCA_RX_CHANNEL   1
#define	PDCA_TX_CHANNEL   0

Functions
static void	configure_console (void)
	Configure serial console. More...
static status_code_t	init_test (void)
	Initialize the TWIM module. More...
static void	read_test_pdca (void)
static void	write_test_pdca (void)
int	main (void)

Variables
twi_package_t	packet_rx
twi_package_t	packet_tx
	TWI data package. More...
static const pdca_channel_config_t	PDCA_RX_CONFIGS
static const pdca_channel_config_t	PDCA_TX_CONFIGS
uint8_t	read_data [PATTERN_TEST_LENGTH]
	Array to store the received test data. More...
uint8_t	write_data [PATTERN_TEST_LENGTH+TARGET_ADDR_LGT]
	Array to store the test data for sending. More...

#define PATTERN_TEST   "SAM4L TWIM PDCA Example"

Referenced by main(), and write_test_pdca().

#define PATTERN_TEST_LENGTH   (sizeof(PATTERN_TEST)/sizeof(uint8_t))

Referenced by main(), read_test_pdca(), and write_test_pdca().

#define PDCA_PID_TWIM1_RX   6

#define PDCA_PID_TWIM1_TX   24

#define PDCA_RX_CHANNEL   1

Referenced by read_test_pdca().

#define PDCA_TX_CHANNEL   0

Referenced by write_test_pdca().

static void configure_console ( void  )

static

Configure serial console.

References uart_rs232_options::baudrate, CONF_UART, CONF_UART_BAUDRATE, CONF_UART_CHAR_LENGTH, CONF_UART_PARITY, CONF_UART_STOP_BITS, and stdio_serial_init().

Referenced by main().

static status_code_t init_test ( void  )

static

Initialize the TWIM module.

Returns

STATUS_OK if the initialization succeeds, error code otherwise.

References EXAMPLE_TWIM, sysclk_get_peripheral_bus_hz(), twim_config::twim_clk, twim_default_callback(), TWIM_MASTER_SPEED, twim_set_callback(), and twim_set_config().

Referenced by main().

int main

(

void

)

Remarks

Main function.

References board_init(), BOARD_NAME, configure_console(), init_test(), PATTERN_TEST, PATTERN_TEST_LENGTH, pdca_enable(), read_data, read_test_pdca(), STATUS_OK, sysclk_init(), and write_test_pdca().

static void read_test_pdca ( void  )

static

References EXAMPLE_TWIM, packet_rx, PATTERN_TEST_LENGTH, PDCA_CH_TRANSFER_COMPLETED, pdca_channel_enable(), pdca_channel_set_config(), pdca_get_channel_status(), PDCA_RX_CHANNEL, read_data, TARGET_ADDR_LGT, TARGET_ADDRESS, twi_master_write(), twim_pdca_transfer_prepare(), and VIRTUALMEM_ADDR.

Referenced by main().

static void write_test_pdca ( void  )

static

References EXAMPLE_TWIM, packet_tx, PATTERN_TEST, PATTERN_TEST_LENGTH, PDCA_CH_TRANSFER_COMPLETED, pdca_channel_enable(), pdca_channel_set_config(), pdca_get_channel_status(), PDCA_TX_CHANNEL, TARGET_ADDR_LGT, TARGET_ADDRESS, twim_pdca_transfer_prepare(), VIRTUALMEM_ADDR, and write_data.

Referenced by main().

twi_package_t packet_rx

Referenced by read_test_pdca().

twi_package_t packet_tx

TWI data package.

Referenced by write_test_pdca().

const pdca_channel_config_t PDCA_RX_CONFIGS

static

Initial value:

= {
    .addr = (void *)read_data,   
    .pid = PDCA_PID_TWIM1_RX,     
    .size = PATTERN_TEST_LENGTH,   
    .r_addr = 0,                   
    .r_size = 0,                   
    .ring = false,                 
    .transfer_size = PDCA_MR_SIZE_BYTE  
}

const pdca_channel_config_t PDCA_TX_CONFIGS

static

Initial value:

= {
    .addr = (void *)write_data,   
    .pid = PDCA_PID_TWIM1_TX,     
    .size = PATTERN_TEST_LENGTH + TARGET_ADDR_LGT,   
    .r_addr = 0,                   
    .r_size = 0,                   
    .ring = false,                 
    .transfer_size = PDCA_MR_SIZE_BYTE  
}

uint8_t read_data[PATTERN_TEST_LENGTH]

Array to store the received test data.

Referenced by main(), and read_test_pdca().

uint8_t write_data[PATTERN_TEST_LENGTH+TARGET_ADDR_LGT]

Array to store the test data for sending.

Referenced by write_test_pdca().