FX3开发入门系列EZ-USB FX3 Software Development Kit
fx3是usb3.0芯片
里边有一个arm 核，
官方资料url
https://www.cypress.com/documentation/software-and-drivers/ez-usb-fx3-software-development-kit
文档和示例代码
本文用的windows 下面开发
用的是
FX3_SDK_Windows_v1.3.3.exe
这个软件是集成很多软件 ，有ide 和gpif ii等软件
FX3_SDK_Windows安装之后会出现这些软件
ez usb suite 是eclipse的ide
创建一个新项目了解开发的流程
1.创建 新项目
选 择FX3 Project 建 新项目
新项目内的文件就一个includes 你的sdk的头文件
cyf_gcc_startup.s 从官方示例取到放项目内
cyxtx.c 也一样从官方取得
main.c 和main.h
main.h
#ifndef MAIN_H_
#define MAIN_H_
#include “cyu3types.h”
#define THREAD_STACK (0x0200) /* App thread stack size /
#define THREAD_PRIORITY (8) / App thread priority */
#endif /* MAIN_H_ */
main.c
/*
- main.c
- Created on: 2020年5月25日
-
Author: Administrator
*/
#include “cyu3system.h”
#include “cyu3os.h”
#include “cyu3error.h”
#include “cyu3gpio.h”
#include “cyu3uart.h”
#include “cyu3utils.h”
#include “main.h”
CyU3PThread Thread1;
CyU3PThread Thread2;
void
Thread1_Entry (
uint32_t input)
{
for (;;)
{
CyU3PThreadSleep (100);
}
}
void
Thread2_Entry (
uint32_t input)
{
for (;;)
{
CyU3PThreadSleep (100);
}
}
/* Application define function which creates the application threads. */
void
CyFxApplicationDefine (
void)
{//CyFxApplicationDefine创建线程的。创建2个线程
void *ptr = NULL;
uint32_t ret = CY_U3P_ERROR_MEMORY_ERROR;
// Create thread1
ptr = CyU3PMemAlloc (THREAD_STACK);
if (ptr != NULL)
{
ret = CyU3PThreadCreate (
&Thread1, /* Thread structure. */
"Thread 1", /* Thread ID and name. */
Thread1_Entry, /* Thread entry function. */
0, /* Thread input parameter. */
ptr, /* Pointer to the allocated thread stack. */
THREAD_STACK, /* Allocated thread stack size. */
THREAD_PRIORITY, /* Thread priority. */
THREAD_PRIORITY, /* Thread pre-emption threshold: No preemption. */
CYU3P_NO_TIME_SLICE, /* No time slice. */
CYU3P_AUTO_START /* Start the thread immediately. */
);
}
else
{
ret = CY_U3P_ERROR_MEMORY_ERROR;
}
if (ret != CY_U3P_SUCCESS)
{
goto InitFail;
}
// Create thread2
ptr = CyU3PMemAlloc (THREAD_STACK);
if (ptr != NULL)
{
ret = CyU3PThreadCreate (
&Thread2, /* Thread structure. */
"Thread 2", /* Thread ID and name. */
Thread2_Entry, /* Thread entry function. */
0, /* Thread input parameter. */
ptr, /* Pointer to the allocated thread stack. */
THREAD_STACK, /* Allocated thread stack size. */
THREAD_PRIORITY, /* Thread priority. */
THREAD_PRIORITY, /* Thread pre-emption threshold: No preemption. */
CYU3P_NO_TIME_SLICE, /* No time slice. */
CYU3P_AUTO_START /* Start the thread immediately. */
);
}
else
{
ret = CY_U3P_ERROR_MEMORY_ERROR;
}
if (ret != CY_U3P_SUCCESS)
{
goto InitFail;
}
return;
InitFail:
/* As the initialization failed, there is nothing much we can do. Just reset the device
* so that we go back to the boot-loader. */
CyU3PDeviceReset (CyFalse);
}
int
main (void)
{
CyU3PIoMatrixConfig_t io_cfg;
CyU3PReturnStatus_t status = CY_U3P_SUCCESS;
/* Initialize the device */
//CPU时钟设置、VIC（向量中断控制器）初始化、设置PLLs（锁相环）
//input clk = 19.2 M;SYS_CLK_PLL = 384M,/2....
// Start with the default clock at 384 MHz
/* Initialize the device */
/* For default configuration, pass in NULL as parameter. This will set CPU divider
* to 2 (~200MHz), DMA and MMIO dividers to 2 (~100MHz); and assume 32KHz standby
* clock is supplied
*/
status = CyU3PDeviceInit (NULL);
if (status != CY_U3P_SUCCESS)
{
goto handle_fatal_error;
}
/* Initialize the caches. Enable both Instruction and Data caches. */
//一般在有大数据处理的时候才会打开数据cache，如果是简单的处理打开了cache可能会降低整个系统的效率！cache size:8k.
status = CyU3PDeviceCacheControl (CyTrue, CyTrue, CyTrue);
if (status != CY_U3P_SUCCESS)
{
goto handle_fatal_error;
}
/* Configure the IO matrix for the device. */
CyU3PMemSet ((uint8_t *)&io_cfg, 0, sizeof(io_cfg));
io_cfg.isDQ32Bit = CyFalse;
io_cfg.s0Mode = CY_U3P_SPORT_INACTIVE;
io_cfg.s1Mode = CY_U3P_SPORT_INACTIVE;
io_cfg.useUart = CyTrue;
io_cfg.useI2C = CyFalse;
io_cfg.useI2S = CyFalse;
io_cfg.useSpi = CyFalse;
io_cfg.lppMode = CY_U3P_IO_MATRIX_LPP_UART_ONLY;
/* No GPIOs are enabled. */
io_cfg.gpioSimpleEn[0] = 0;
io_cfg.gpioSimpleEn[1] = 0;
io_cfg.gpioComplexEn[0] = 0;
io_cfg.gpioComplexEn[1] = 0;
status = CyU3PDeviceConfigureIOMatrix (&io_cfg);
if (status != CY_U3P_SUCCESS)
{
goto handle_fatal_error;
}
/* This is a non returnable call for initializing the RTOS kernel */
CyU3PKernelEntry ();//执行到此会跳入: CyFxApplicationDefine().
/* Dummy return to make the compiler happy */
return 0;
handle_fatal_error:
/* Cannot recover from this error. */
while (1);
}
之后编译
代码的学习从示例和官方文档学习