xushaoxiang
133 lines
4.1 KiB
C
133 lines
4.1 KiB
C
/*!
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* \file spi_slave.c
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*
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* \brief Target spi slave device implementation
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*
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* \copyright Revised BSD License, see section \ref LICENSE.
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*
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* \code
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*
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* _ __ _ ________ _
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* | |/ /(_)___ / ____/ /_ (_)___
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* | // / __ \/ / / __ \/ / __ \
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* / |/ / / / / /___/ / / / / /_/ /
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* /_/|_/_/_/ /_/\____/_/ /_/_/ .___/
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* /_/
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* (C) 2022-2025 XinChip
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*
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* \endcode
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*
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* \author ( XinChip ) Alex-J
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*
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* \author ( XinChip )
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*/
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/*-----------------------------------------------------------------------------------
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INCLUDE HEADE FILES
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------------------------------------------------------------------------------------*/
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#include "spi_slave.h"
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#include "xc_drv_spi.h"
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/*------------------------------------------------------------------------------------
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Macros
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-------------------------------------------------------------------------------------*/
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#define SL_NODMA_BUFFER_LEN 16U
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/*------------------------------------------------------------------------------------
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Global Variables
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-------------------------------------------------------------------------------------*/
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/*------------------------------------------------------------------------------------
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Functions
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-------------------------------------------------------------------------------------*/
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/**
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* @brief spi_slave_demo
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* @details
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* @param void
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* @retval void
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*/
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void spi_slave_demo(void)
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{
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DEBUG("__SPI_SLAVE_DEMO__\r");
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SPI_InitCfg_t spi_cfg = {0};
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GPIO_InitCfg_t gpio_cfg = {0};
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gpio_cfg.Mux = GPIO_Mux0;
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gpio_cfg.Dir = GPIO_DIR_INPUT;
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gpio_cfg.FunSel = SSI1_CLK;
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gpio_cfg.Int = NOT_INT;
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gpio_cfg.Pull = GPIO_PULLDOWN;
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gpio_cfg.Pin = GPIO_5;
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xc_gpio_init(&gpio_cfg);
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gpio_cfg.FunSel = SSI1_SSN;
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gpio_cfg.Pin = GPIO_15;
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xc_gpio_init(&gpio_cfg);
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gpio_cfg.Dir = GPIO_DIR_OUTPUT;
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gpio_cfg.FunSel = SSI1_TX;
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gpio_cfg.Pin = GPIO_16;
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xc_gpio_init(&gpio_cfg);
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gpio_cfg.Dir = GPIO_DIR_INPUT;
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gpio_cfg.FunSel = SSI1_RX;
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gpio_cfg.Pin = GPIO_17;
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xc_gpio_init(&gpio_cfg);
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spi_cfg.Mode = SPI_MODE_SLAVE;
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spi_cfg.DataSize = SSI_CTRL0_DFS_LEN_8BIT;
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spi_cfg.Direction = SSI_CTRL0_TMOD_WR;
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spi_cfg.BaudRatePrescaler = SSI_BAUD_DIV_8;
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spi_cfg.CLKPolarity = SSI_CTRL0_SCPOL_LOW;
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spi_cfg.CLKPhase = SSI_CTRL0_SCPHA_TRAIL;
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spi_cfg.FirstBit = SPI_FirstBit_MSB;
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uint8_t spi_handle = SPI1_IDX;
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xc_spi_init(spi_handle, &spi_cfg);
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uint8_t txbuff[SL_NODMA_BUFFER_LEN];
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uint8_t rxbuff[SL_NODMA_BUFFER_LEN];
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xc_spi_rxftl_fifo_set(spi_handle, SSI_RXFTL_FIFO_7);
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xc_spi_enable_it(spi_handle, SSI_IE_RXFIE_ENABLE);
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DEBUG("Write buffer: \n");
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for (int i = 0; i < sizeof(txbuff); i++) {
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txbuff[i] = i + 1;
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PRINT("%02x ", txbuff[i]);
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}
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PRINT("\n");
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xc_spi_write_and_read_data(spi_handle,(uint8_t *)txbuff,sizeof(txbuff),
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(uint8_t *)rxbuff,sizeof(rxbuff));
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DEBUG("Read buffer: \n");
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for (int i = 0; i < sizeof(rxbuff); i++) {
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PRINT("%02x ", rxbuff[i]);
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}
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PRINT("\n");
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DEBUG("__SPI_END__\n");
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DEBUG("Write buffer: \n");
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memset((uint8_t *)txbuff, 0xbb, sizeof(txbuff));
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for (int i = 0; i < sizeof(txbuff); i++) {
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PRINT("%02x ", txbuff[i]);
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}
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PRINT("\n");
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xc_spi_write_and_read_data(spi_handle,(uint8_t *)txbuff,sizeof(txbuff),
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(uint8_t *)rxbuff,sizeof(rxbuff));
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DEBUG("Read buffer: \n");
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for (int i = 0; i < sizeof(rxbuff); i++) {
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PRINT("%02x ", rxbuff[i]);
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}
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PRINT("\n");
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DEBUG("__SPI_END2__\n");
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}
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