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Last active October 26, 2016 00:18
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Updated spi_tester.c
/******************************************************************************
*
* Copyright (C) 2009 - 2014 Xilinx, Inc. All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* Use of the Software is limited solely to applications:
* (a) running on a Xilinx device, or
* (b) that interact with a Xilinx device through a bus or interconnect.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* XILINX BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
* OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
* Except as contained in this notice, the name of the Xilinx shall not be used
* in advertising or otherwise to promote the sale, use or other dealings in
* this Software without prior written authorization from Xilinx.
*
******************************************************************************/
/*
* spi_tester.c: Will test send/receive functions of SPI module
*
* This application configures UART 16550 to baud rate 9600.
* PS7 UART (Zynq) is not initialized by this application, since
* bootrom/bsp configures it to baud rate 115200
*
* ------------------------------------------------
* | UART TYPE BAUD RATE |
* ------------------------------------------------
* uartns550 9600
* uartlite Configurable only in HW design
* ps7_uart 115200 (configured by bootrom/bsp)
*/
#define SPI_DEVICE_ID XPAR_SPI_0_DEVICE_ID
#define GPIO_DEVICE_ID XPAR_AXI_GPIO_0_DEVICE_ID
#define LED_CHANNEL 0x1
#include <stdio.h>
#include "platform.h"
#include "xparameters.h"
#include "xspi.h"
#include "xgpio.h"
static XSpi SpiInstance;
static XGpio GpioInstance;
int init_spi(XSpi *SpiInstancePtr);
void spi_write(XSpi *SpiInstancePtr, u8 addr, u8 value);
u8 spi_read(XSpi *SpiInstancePtr, u8 addr);
int init_gpio(XGpio *GpioInstancePtr);
void delay(int n);
int main()
{
//This is all initialization code, you don't need to modify this
init_platform();
init_spi(&SpiInstance);
init_gpio(&GpioInstance);
u8 LED_data = 0x1;
XGpio_DiscreteWrite(&GpioInstance, LED_CHANNEL, LED_data);
LED_data |= 0x1<<1;
XGpio_DiscreteWrite(&GpioInstance, LED_CHANNEL, LED_data);
//TODO: Create better tests below
/*The current test writes the value 10 to address 0 by writing over SPI
then checks to see what it gets from address 0 by reading over SPI.*/
int addr = 0;
int value = 10;
spi_write(&SpiInstance, addr, value); //spi_write needs to be filled in
u8 res = spi_read(&SpiInstance, addr); //spi_read has been provided
if (res != value) {
LED_data |= 0x1<<2;
XGpio_DiscreteWrite(&GpioInstance, LED_CHANNEL, LED_data);
//You need to insert a breakpoint here to check the variables if your tester breaks.
return 0;
}
//Everything below is cleanup code, you don't need to modify this
XGpio_DiscreteWrite(&GpioInstance, LED_CHANNEL, LED_data);
LED_data |= 0x1<<3;
XGpio_DiscreteWrite(&GpioInstance, LED_CHANNEL, LED_data);
cleanup_platform();
return 0;
}
void spi_write(XSpi *SpiInstancePtr, u8 addr, u8 value){
// TODO: Your code here! Read the xspi.h file for more information on XSpi_Transfer()
}
u8 spi_read(XSpi *SpiInstancePtr, u8 addr){
/*SpiInstancePtr is the pointer to the SPI protocol object we created
* during the beginning lines of main()*/
u8 addr_byte = (addr << 1); //Shifted, because we have 7 bits of addr, 1 bit of R/W
addr_byte |= 0x1;
u8 RcvBuf[2];
u8 SendBuf[2];
SendBuf[0] = addr_byte;
SendBuf[1] = 0; //2nd byte is 0, because we're reading data
XSpi_Transfer(SpiInstancePtr, SendBuf, RcvBuf, 2); //The 2 is the # of expected bytes returned
return RcvBuf[1]; //1st byte of RcvBuf is garbage (from when the addr was shifted in), 2nd byte is data
}
int init_gpio(XGpio *GpioInstancePtr){
int Status;
Status = XGpio_Initialize(GpioInstancePtr, GPIO_DEVICE_ID);
if (Status != XST_SUCCESS) {
return XST_FAILURE;
}
XGpio_SetDataDirection(GpioInstancePtr, LED_CHANNEL, 0x0);
return XST_SUCCESS;
}
int init_spi(XSpi *SpiInstancePtr){
int Status;
XSpi_Config *ConfigPtr; /* Pointer to Configuration data */
ConfigPtr = XSpi_LookupConfig(SPI_DEVICE_ID);
if (ConfigPtr == NULL) {
return XST_DEVICE_NOT_FOUND;
}
Status = XSpi_CfgInitialize(SpiInstancePtr, ConfigPtr,
ConfigPtr->BaseAddress);
if (Status != XST_SUCCESS) {
return XST_FAILURE;
}
Status = XSpi_SelfTest(SpiInstancePtr);
if (Status != XST_SUCCESS) {
return XST_FAILURE;
}
if (SpiInstancePtr->SpiMode != XSP_STANDARD_MODE) {
return XST_SUCCESS;
}
Status = XSpi_SetOptions(SpiInstancePtr, XSP_MASTER_OPTION);
if (Status != XST_SUCCESS) {
return XST_FAILURE;
}
XSpi_Start(SpiInstancePtr);
XSpi_IntrGlobalDisable(SpiInstancePtr);
return XST_SUCCESS;
}
void delay(int n){
int i;
volatile int k;
for(i = 0; i < n; i++){
k++;
}
}
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