126 lines
3.8 KiB
C
126 lines
3.8 KiB
C
/*
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* Copyright (C) 2014 Infineon Technologies AG. All rights reserved.
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*
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* Infineon Technologies AG (Infineon) is supplying this software for use with
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* Infineon's microcontrollers.
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* This file can be freely distributed within development tools that are
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* supporting such microcontrollers.
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*
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* THIS SOFTWARE IS PROVIDED "AS IS". NO WARRANTIES, WHETHER EXPRESS, IMPLIED
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* OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE.
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* INFINEON SHALL NOT, IN ANY CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL,
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* OR CONSEQUENTIAL DAMAGES, FOR ANY REASON WHATSOEVER.
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*
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*/
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/**
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* @file
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* @date 15 January,2015
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* @version 0.1.3
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*
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* @brief SPI demo example
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*
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* Send two periodic messages via SPI with different lengths
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*
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* History <br>
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*
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* Version 0.1.0 Initial <br>
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* Version 0.1.1 Updated with latest llds<br>
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* Version 0.1.2 Updated with latest llds<br>
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* Version 0.1.3 Updated with latest llds<br>
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*/
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#include "xmc_spi.h"
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#include "xmc_gpio.h"
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#define TICKS_PER_SECOND 1000
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#define TICKS_WAIT 1000
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const uint8_t data[3] = {0x84,0xFF,0x84};
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XMC_GPIO_CONFIG_t rx_pin_config;
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XMC_GPIO_CONFIG_t tx_pin_config;
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XMC_GPIO_CONFIG_t selo_pin_config;
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XMC_GPIO_CONFIG_t clk_pin_config;
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/**
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* @brief SPI configuration structure
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*/
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XMC_SPI_CH_CONFIG_t spi_config =
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{
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.baudrate = 10000,
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.bus_mode = XMC_SPI_CH_BUS_MODE_MASTER,
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.selo_inversion = XMC_SPI_CH_SLAVE_SEL_INV_TO_MSLS,
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.parity_mode = XMC_USIC_CH_PARITY_MODE_NONE
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};
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void SysTick_Handler(void)
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{
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uint8_t i=0;
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static uint32_t ticks = 0;
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ticks++;
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if (ticks == TICKS_WAIT)
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{
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/*Enable Slave Select line 0*/
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XMC_SPI_CH_EnableSlaveSelect(XMC_SPI0_CH0, XMC_SPI_CH_SLAVE_SELECT_0);
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/*Sending a byte*/
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XMC_SPI_CH_Transmit(XMC_SPI0_CH0, data[0], XMC_SPI_CH_MODE_STANDARD);
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/*Wait till the byte has been transmitted*/
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while((XMC_SPI_CH_GetStatusFlag(XMC_SPI0_CH0) & XMC_SPI_CH_STATUS_FLAG_TRANSMIT_SHIFT_INDICATION) == 0U);
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XMC_SPI_CH_ClearStatusFlag(XMC_SPI0_CH0, XMC_SPI_CH_STATUS_FLAG_TRANSMIT_SHIFT_INDICATION);
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/*Disable Slave Select line */
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XMC_SPI_CH_DisableSlaveSelect(XMC_SPI0_CH0);
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/*Enable Slave Select line 0*/
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XMC_SPI_CH_EnableSlaveSelect(XMC_SPI0_CH0, XMC_SPI_CH_SLAVE_SELECT_0);
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/*Sending 3 position of data array*/
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while(i<3)
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{
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XMC_SPI_CH_Transmit(XMC_SPI0_CH0,data[i++],XMC_SPI_CH_MODE_STANDARD);
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while((XMC_SPI_CH_GetStatusFlag(XMC_SPI0_CH0) & XMC_SPI_CH_STATUS_FLAG_TRANSMIT_SHIFT_INDICATION) == 0U);
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XMC_SPI_CH_ClearStatusFlag(XMC_SPI0_CH0, XMC_SPI_CH_STATUS_FLAG_TRANSMIT_SHIFT_INDICATION);
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}
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i=0;
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/*Disable Slave Select line */
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XMC_SPI_CH_DisableSlaveSelect(XMC_SPI0_CH0);
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ticks = 0;
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}
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}
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int main(void)
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{
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/* Initialize and Start SPI */
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XMC_SPI_CH_Init(XMC_SPI0_CH0, &spi_config);
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XMC_SPI_CH_SetInputSource(XMC_SPI0_CH0, XMC_SPI_CH_INPUT_DIN0, USIC0_C0_DX0_P2_0);
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XMC_SPI_CH_Start(XMC_SPI0_CH0);
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/* GPIO Input pin configuration */
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rx_pin_config.mode = XMC_GPIO_MODE_INPUT_TRISTATE;
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XMC_GPIO_Init(XMC_GPIO_PORT2, 0, &rx_pin_config);
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/* GPIO Output pin configuration */
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tx_pin_config.mode = XMC_GPIO_MODE_OUTPUT_PUSH_PULL_ALT7;
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XMC_GPIO_Init(XMC_GPIO_PORT1,0, &tx_pin_config);
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/* GPIO Slave Select line pin configuration */
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selo_pin_config.mode = XMC_GPIO_MODE_OUTPUT_PUSH_PULL_ALT6;
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XMC_GPIO_Init(XMC_GPIO_PORT0,9, &selo_pin_config);
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/* GPIO Clock pin configuration */
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clk_pin_config.mode = XMC_GPIO_MODE_OUTPUT_PUSH_PULL_ALT6;
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XMC_GPIO_Init(XMC_GPIO_PORT0,8, &clk_pin_config);
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/* Start sending periodic message */
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SysTick_Config(SystemCoreClock / TICKS_PER_SECOND);
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while(1)
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{
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/* Infinite loop */
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}
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}
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