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Diffstat (limited to 'examples/imx7d_val_m4/driver_examples/ecspi/ecspi_polling/slave/main.c')
-rw-r--r-- | examples/imx7d_val_m4/driver_examples/ecspi/ecspi_polling/slave/main.c | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/examples/imx7d_val_m4/driver_examples/ecspi/ecspi_polling/slave/main.c b/examples/imx7d_val_m4/driver_examples/ecspi/ecspi_polling/slave/main.c new file mode 100644 index 0000000..67785c7 --- /dev/null +++ b/examples/imx7d_val_m4/driver_examples/ecspi/ecspi_polling/slave/main.c @@ -0,0 +1,99 @@ +/* + * 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" + +/* define ECSPI slave mode burst length */ +#define ECSPI_SLAVE_BURSTLENGTH (7) +#define FIRST_DATA 0xFF + +int main(void) +{ + uint8_t txBuffer[20] = {0}; + uint8_t rxBuffer[20] = {0}; + uint8_t txData = FIRST_DATA; + + ecspi_init_config_t initConfig = { + .clockRate = 0, + .baudRate = 0, + .mode = ecspiSlaveMode, + .burstLength = ECSPI_SLAVE_BURSTLENGTH, + .channelSelect = BOARD_ECSPI_SLAVE_CHANNEL, + .clockPhase = ecspiClockPhaseSecondEdge, + .clockPolarity = ecspiClockPolarityActiveHigh, + .ecspiAutoStart = 0 + }; + + /* Hardware initialize, include RDC, CLOCK, IOMUX, ENABLE MODULE */ + hardware_init(); + + PRINTF("\n-------------- ECSPI slave driver example --------------\n\n\r"); + PRINTF("This example application demonstrates usage of ECSPI slave driver.\n\r"); + PRINTF("It responding to master via SPI bus.\n\n\r"); + + /* Initialize ECSPI, parameter configure */ + ECSPI_Init(BOARD_ECSPI_SLAVE_BASEADDR, &initConfig); + + PRINTF("SLAVE: Initial transmit data: %d\n\n\r", FIRST_DATA); + /* Move first data to tx data register to be ready for first transmission. */ + ECSPI_SendData(BOARD_ECSPI_SLAVE_BASEADDR, txData); + + /* Send data to master and receive data from master */ + txData = 0; + + for(uint8_t i = 0; i < 20; i++) + { + /* Wait for data received */ + while(!ECSPI_GetStatusFlag(BOARD_ECSPI_SLAVE_BASEADDR, ecspiFlagRxfifoReady)); + /* Fill rxBuffer */ + rxBuffer[i] = ECSPI_ReceiveData(BOARD_ECSPI_SLAVE_BASEADDR); + /* Store tx data to tx data register for next transmission */ + ECSPI_SendData(BOARD_ECSPI_SLAVE_BASEADDR, txData); + txBuffer[i] = txData; + txData++; + } + + for(uint8_t i = 0; i < 20; i++) + { + PRINTF("SLAVE: Next step transmit data: %d\n\r", txBuffer[i]); + PRINTF(" : Currently received data: %d\n\n\r", rxBuffer[i]); + } + + PRINTF("Example finish!!!\n\r"); + while(1) + __WFI(); +} + +/******************************************************************************* + * EOF + ******************************************************************************/ |