is42s16100e_example.c File Reference

SDRAMC on EBI example for SAM.

Copyright (c) 2015-2018 Microchip Technology Inc. and its subsidiaries.

#include "asf.h"
#include "conf_board.h"

Macros
#define	SDRAMC_TEST_BUFF_SIZE   (30 * 1024)
	SDRAM benchmark test size. More...
#define	SDRAMC_TEST_EVEN_TAG   (0x55aaaa55)
	SDRAMC access test data in even address. More...
#define	SDRAMC_TEST_LENGTH   (10 * 1024)
	SDRAMC access test length. More...
#define	SDRAMC_TEST_ODD_TAG   (0xaa5555aa)
	SDRAMC access test data in odd address. More...
#define	SDRAMC_TEST_PAGE_NUM   (1024)
	SDRAM benchmark test page number. More...
#define	STRING_EOL   "\r"
#define	STRING_HEADER

Enumerations
enum	sdramc_status_t {   SDRAMC_OK = 0,   SDRAMC_TIMEOUT = 1,   SDRAMC_ERROR = 2 }
	SDRAMC status. More...

Functions
static void	configure_console (void)
	Configure the console uart. More...
static uint32_t	get_delay_in_ticks (uint32_t ul_start_tick, uint32_t ul_end_tick)
	Get delayed number of ticks. More...
int	main (void)
	Application entry point for sdramc_example. More...
static uint8_t	sdram_access_test (void)
	Access test of the first 10K bytes of external SDRAM. More...
static uint32_t	sdram_benchmarks (void)
	SDRAM benchmark test. More...
void	SysTick_Handler (void)
	Systick handler to manage timestamp and delay. More...
static uint32_t	tick_get_count (void)
	Get current tick count (in ms). More...

Variables
static volatile uint16_t	gs_pus_mem_buff [SDRAMC_TEST_BUFF_SIZE]
	SDRAM benchmark buffer. More...
static volatile uint32_t	gs_ul_ms_ticks = 0

#define SDRAMC_TEST_BUFF_SIZE   (30 * 1024)

SDRAM benchmark test size.

Referenced by sdram_benchmarks().

#define SDRAMC_TEST_EVEN_TAG   (0x55aaaa55)

SDRAMC access test data in even address.

Referenced by sdram_access_test().

#define SDRAMC_TEST_LENGTH   (10 * 1024)

SDRAMC access test length.

Referenced by sdram_access_test().

#define SDRAMC_TEST_ODD_TAG   (0xaa5555aa)

SDRAMC access test data in odd address.

Referenced by sdram_access_test().

#define SDRAMC_TEST_PAGE_NUM   (1024)

SDRAM benchmark test page number.

Referenced by sdram_benchmarks().

#define STRING_EOL   "\r"

#define STRING_HEADER

Value:

"-- SDRAMC Example --\r\n" \
    "-- "BOARD_NAME " --\r\n" \
    "-- Compiled: "__DATE__ " "__TIME__ " --"STRING_EOL

Referenced by main().

enum sdramc_status_t

SDRAMC status.

Enumerator
SDRAMC_OK
SDRAMC_TIMEOUT
SDRAMC_ERROR

static void configure_console ( void  )

static

Configure the console uart.

References uart_rs232_options::baudrate, NULL, stdio_serial_init(), and sysclk_enable_peripheral_clock().

Referenced by main().

static uint32_t get_delay_in_ticks ( uint32_t  ul_start_tick, uint32_t  ul_end_tick  )

static

Get delayed number of ticks.

Parameters

ul_start_tick	Start tick point.
ul_end_tick	End tick point.

Returns

Delayed number of ticks.

Referenced by sdram_benchmarks().

int main

(

void

)

Application entry point for sdramc_example.

Returns

Unused (ANSI-C compatibility).

References board_init(), configure_console(), pmc_enable_periph_clk(), sdram_access_test(), sdram_benchmarks(), sdram_enable_unaligned_support(), SDRAM_ISSI_IS42S16100E, sdramc_init(), SDRAMC_OK, sleepmgr_enter_sleep(), sleepmgr_init(), STRING_HEADER, sysclk_get_cpu_hz(), and sysclk_init().

static uint8_t sdram_access_test ( void  )

static

Access test of the first 10K bytes of external SDRAM.

Returns

SDRAMC_OK if test is passed, else SDRAMC_ERROR.

References SDRAMC_ERROR, SDRAMC_OK, SDRAMC_TEST_EVEN_TAG, SDRAMC_TEST_LENGTH, and SDRAMC_TEST_ODD_TAG.

Referenced by main().

static uint32_t sdram_benchmarks ( void  )

static

SDRAM benchmark test.

Returns

SDRAMC_OK for success and SDRAMC_ERROR for error.

References get_delay_in_ticks(), gs_pus_mem_buff, SDRAMC_ERROR, SDRAMC_OK, SDRAMC_TEST_BUFF_SIZE, SDRAMC_TEST_PAGE_NUM, and tick_get_count().

Referenced by main().

void SysTick_Handler

(

void

)

Systick handler to manage timestamp and delay.

References gs_ul_ms_ticks.

static uint32_t tick_get_count ( void  )

static

Get current tick count (in ms).

Returns

Current tick count value.

References gs_ul_ms_ticks.

Referenced by sdram_benchmarks().

volatile uint16_t gs_pus_mem_buff[SDRAMC_TEST_BUFF_SIZE]

static

SDRAM benchmark buffer.

Referenced by sdram_benchmarks().

volatile uint32_t gs_ul_ms_ticks = 0

static

Referenced by SysTick_Handler(), and tick_get_count().