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/*
* Copyright (c) 2015, Freescale Semiconductor, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* o Redistributions of source code must retain the above copyright notice, this list
* of conditions and the following disclaimer.
*
* o Redistributions in binary form must reproduce the above copyright notice, this
* list of conditions and the following disclaimer in the documentation and/or
* other materials provided with the distribution.
*
* o Neither the name of Freescale Semiconductor, Inc. nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <stdio.h>
#include "board.h"
#include "debug_console_imx.h"
#include "ecspi.h"
#include "clock_freq.h"
/* define ECSPI master mode parameters configuration. */
#define ECSPI_MASTER_BURSTLENGTH (7)
#define ECSPI_MASTER_STARTMODE (0)
#define BURST_LENGTH_IN_BYTES(x) ((8 * x) - 1)
/* ECSPI data transfer */
static bool ECSPI_MasterTransfer(uint8_t* txBuffer, uint8_t* rxBuffer, uint32_t transferSize);
int main(void)
{
uint8_t txData = 0;
uint8_t rxData = 0;
uint8_t control_char;
ecspi_init_config_t initConfig = {
.baudRate = 500000,
.mode = ecspiMasterMode,
.burstLength = ECSPI_MASTER_BURSTLENGTH,
.channelSelect = BOARD_ECSPI_CHANNEL,
.clockPhase = ecspiClockPhaseSecondEdge,
.clockPolarity = ecspiClockPolarityActiveHigh,
.ecspiAutoStart = ECSPI_MASTER_STARTMODE
};
/* Hardware initialize, include RDC, CLOCK, IOMUX, ENABLE MODULE */
hardware_init();
/* Update clock frequency of this module */
initConfig.clockRate = get_ecspi_clock_freq(BOARD_ECSPI_BASEADDR);
PRINTF("\n-------------- ECSPI master driver example --------------\n\n\r");
PRINTF("This example application demonstrates usage of SPI driver in master mode.\n\r");
PRINTF("It transfers data to/from remote MCU in SPI slave mode.\n\r");
/* Ecspi module initialize, include configure parameters */
ECSPI_Init(BOARD_ECSPI_BASEADDR, &initConfig);
/* Wait slave ready, then press 's' to start communication. */
while (true)
{
PRINTF("Press \"s\" when SPI slave is ready.\n\r");
control_char = GETCHAR();
if ((control_char == 's') || (control_char == 'S'))
break;
}
/* Send 1~20 to slave and receive data from slave */
for (uint8_t i = 0; i < 20; i++)
{
txData++;
ECSPI_MasterTransfer(&txData, &rxData, 1);
PRINTF("MASTER: Transmited data: %d \n\r", txData);
PRINTF(" : Received data: %d \n\r", rxData);
}
PRINTF("Example finish!!!\n\r");
while (1)
__WFI();
}
/******************************************************************************
*
* Function Name: ECSPI_MasterTransfer
* Comments: Transmit and Receive an amount of data in no-blocking mode with
* interrupt.
*
******************************************************************************/
static bool ECSPI_MasterTransfer(uint8_t* txBuffer, uint8_t* rxBuffer, uint32_t transferSize)
{
if (0 == transferSize)
return false;
/* Set the burst length to one byte(8 bits) */
ECSPI_SetBurstLength(BOARD_ECSPI_BASEADDR, BURST_LENGTH_IN_BYTES(1));
while (transferSize)
{
/* Fill the TXFIFO */
ECSPI_SendData(BOARD_ECSPI_BASEADDR, *txBuffer++);
/* start transmission */
ECSPI_StartBurst(BOARD_ECSPI_BASEADDR);
/* Wait transmission finish */
while (!ECSPI_GetStatusFlag(BOARD_ECSPI_BASEADDR, ecspiFlagTxfifoTc));
ECSPI_ClearStatusFlag(BOARD_ECSPI_BASEADDR, ecspiFlagTxfifoTc);
/* Fill the RXFIFO */
*rxBuffer = ECSPI_ReceiveData(BOARD_ECSPI_BASEADDR);
transferSize--;
}
return true;
}
/*******************************************************************************
* EOF
******************************************************************************/
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