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STM32f407 网络接收 fpga 的 bin 文件并更新到 fpga series7(3)
简介
实验 3：在搭建好 tcp 服务器，并拟定好协议的前提下，接收每一个 bin 文件的块，配置到 fpga。
原理图
fpga
fpga1
stm32
接线总结
// fpga引脚 stm32引脚
// 用不到D_OUT
#define PROGRAM_B PB0
#define INT_B PB1
#define CCLK PC10
#define D01_DIN PC12
#define DONE PD3
手册
搜索下载关键词：Xilinx XAPP583 Using a Microprocessor to Configure Xilinx 7 Series FPGAs
引脚
时序
伪代码在手册里，自己看
stm32cube 配置
单片机代码
load_fpga.c
#include "load_fpga.h"#include <stdio.h>
#include "main.h"#define WRITE_PROGRAM_B(x) HAL_GPIO_WritePin(GPIOB, GPIO_PIN_0, x)
#define WRITE_CCLK(x) HAL_GPIO_WritePin(GPIOC, GPIO_PIN_10, x)
#define WRITE_D01_DIN(x) HAL_GPIO_WritePin(GPIOC, GPIO_PIN_12, x)
#define READ_INT_B() HAL_GPIO_ReadPin(GPIOB, GPIO_PIN_1)
#define READ_DONE() HAL_GPIO_ReadPin(GPIOD, GPIO_PIN_3)/// @brief 交换4字节顺序
/// eg: 0xaabbccdd -> 0xddccbbaas
/// @param data
/// @return
unsigned int swap_uint32(unsigned int data) {unsigned int swapped;swapped = ((data << 24) & 0xFF000000) | ((data << 8) & 0x00FF0000) |((data >> 8) & 0x0000FF00) | ((data >> 24) & 0x000000FF);return swapped;
}/// @brief 产生count个时钟上升沿
/// @param drvdata
/// @param count
void shift_cclk(unsigned int count) {int i;// WRITE_CCLK(0); // 感觉有点多余，影响接收速度了for (i = 0; i < count; ++i) {WRITE_CCLK(1);WRITE_CCLK(0);}
}/// @brief 写入每一位，从高位开始
/// @param data32
void shift_word_out(unsigned int data32) {int i;unsigned int data;for (i = 31; i >= 0; i--) {data = (data32 & 1 << i) ? 1 : 0;WRITE_D01_DIN(data);shift_cclk(1);}
}/// @brief 准备写入
/// 配置准备下入状态
/// @param
/// @return 成功返回0
int program_init(void) {int i = 0;/* Configuration Reset */WRITE_PROGRAM_B(0);HAL_Delay(1); // 1usWRITE_PROGRAM_B(1);/* Wait for Device Initialization */while (READ_INT_B() == 0) {++i;if (i > 0x00010000) {printf("INIT_B has not gone high\n");return -1;}}return 0;
}/// @brief 写入fpga
/// @param buf
/// @param len
/// @return 成功返回0
int program_data(char *buf, int len) {int i;for (i = 0; i < len; i += 4) {shift_word_out(swap_uint32(*(uint32_t *)(buf + i)));if (READ_INT_B() == 0) {printf("INIT_B error\n");return -1;}}return 0;
}/// @brief 写入完成
/// @param
/// @return 成功返回0
int program_done(void) {/* Check INIT_B */if (READ_INT_B() == 0) {printf("INIT_B error\n");return -1;}/* Wait for DONE to assert */int i = 0;while (READ_DONE() == 0) {shift_cclk(1); // 不加会导致又概率失败++i;if (i > 0x00010000) {printf("DONE has not gone high\n");return -1;}}/* Compensate for Special Startup Conditions */shift_cclk(8);return 0;
}
tcp_echo.c
#include "tcp_echo.h"
#include "lwip/opt.h"
#include "lwip/tcp.h"
#include "load_fpga.h"
#if LWIP_NETCONN#include "lwip/sys.h"#include "lwip/api.h"#define TCPECHO_THREAD_PRIO (tskIDLE_PRIORITY + 4)#define kbuffer_len 1024#define kheader_size 24#define kdata_len 1000#define kmagic 0xaa5555aachar buffer[kbuffer_len];struct tcp_package_header {uint32_t magic;uint32_t type;uint32_t data_offset;uint32_t data_len;uint32_t order;uint32_t magic1;
};/// @brief TCP服务函数
/// @param arg
static void tcpecho_thread(void *arg) {struct netconn *conn, *newconn;err_t err, accept_err;struct netbuf *buf;void *data;u16_t len;int ret = 0;LWIP_UNUSED_ARG(arg);#if 1/* Create a new connection identifier. */conn = netconn_new(NETCONN_TCP);if (conn != NULL) {/* Bind connection to well known port number 7. */err = netconn_bind(conn, NULL, 7);if (err == ERR_OK) {/* Tell connection to go into listening mode. */netconn_listen(conn);while (1) {/* Grab new connection. */accept_err = netconn_accept(conn, &newconn);/* Process the new connection. */if (accept_err == ERR_OK) {while (netconn_recv(newconn, &buf) == ERR_OK) {netbuf_data(buf, &data, &len);do {// 1 拿到帧头struct tcp_package_header *head;head = (struct tcp_package_header *)data;// 2 判断typeswitch (head->type) {case 0xA: ret = program_init(); break;case 0xB:ret = program_data((char *)data + sizeof(struct tcp_package_header),head->data_len);break;case 0xC: ret = program_done(); break;default: break;}// 3 回发给tcp_clientif (ret < 0) {head->data_offset = 1;} else {head->data_offset = 0;}netconn_write(newconn, head, sizeof(struct tcp_package_header),NETCONN_COPY);} while (netbuf_next(buf) >= 0);netbuf_delete(buf);}/* Close connection and discard connection identifier. */netconn_close(newconn);netconn_delete(newconn);}}} else {netconn_delete(newconn);}}#endif
}// 创建tcp服务函数任务
void tcpecho_init(void) {sys_thread_new("tcpecho_thread", tcpecho_thread, NULL, DEFAULT_THREAD_STACKSIZE,TCPECHO_THREAD_PRIO);
}#endif /* LWIP_NETCONN */
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