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////////////////////////////////////////////////////////////////////////////////
//
// Filename:    pipecmdr.h
//
// Project:     XuLA2-LX25 SoC based upon the ZipCPU
//
// Purpose:     This program attaches to a Verilated Verilog IP core.
//              It will not work apart from such a core.  Once attached,
//      it connects the simulated core to a controller via a pipe interface
//      designed to act like a UART.  Indeed, it is hoped that the final
//      interface would be via UART.  Until that point, however, this is just
//      a simple test facility designed to verify that the  IP core works
//      prior to such actual hardware implementation.
//
// Creator:     Dan Gisselquist, Ph.D.
//              Gisselquist Technology, LLC
//
////////////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2015-2016, Gisselquist Technology, LLC
//
// This program is free software (firmware): you can redistribute it and/or
// modify it under the terms of  the GNU General Public License as published
// by the Free Software Foundation, either version 3 of the License, or (at
// your option) any later version.
//
// This program is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTIBILITY or
// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
// for more details.
//
// You should have received a copy of the GNU General Public License along
// with this program.  (It's in the $(ROOT)/doc directory, run make with no
// target there if the PDF file isn't present.)  If not, see
// <http://www.gnu.org/licenses/> for a copy.
//
// License:     GPL, v3, as defined and found on www.gnu.org,
//              http://www.gnu.org/licenses/gpl.html
//
//
////////////////////////////////////////////////////////////////////////////////
//
//
#ifndef PIPECMDR_H
#define PIPECMDR_H
 
#include <sys/types.h>
#include <sys/socket.h>
#include <poll.h>
#include <unistd.h>
#include <arpa/inet.h>
 
#include "testb.h"
 
#define PIPEBUFLEN      256
 
// At 115200 Baud, 8 bits of data, no parity and one stop bit, there will
// bit ten bits per character and therefore 8681 clocks per transfer
//      8681 ~= 100 MHz / 115200 (bauds / second) * 10 bauds / character
//
// #define      UARTLEN         8681 // Minimum ticks per character, 115200 Baud
//
// At 4MBaud, each bit takes 25 clocks.  10 bits would thus take 250 clocks
//              
// #define      UARTLEN         250 // Minimum ticks per character, 4M Baud
// #define      UARTLEN         1000 // Minimum ticks per character, 1M Hz
// #define      UARTLEN         8 // Minimum ticks per character
#define UARTLEN         4096    //
 
template <class VA>     class   PIPECMDR : public TESTB<VA> {
        void    setup_listener(const int port) {
                struct  sockaddr_in     my_addr;
 
                printf("Listening on port %d\n", port);
 
                m_skt = socket(AF_INET, SOCK_STREAM, 0);
                if (m_skt < 0) {
                        perror("Could not allocate socket: ");
                        exit(-1);
                }
 
                // Set the reuse address option
                {
                        int optv = 1, er;
                        er = setsockopt(m_skt, SOL_SOCKET, SO_REUSEADDR, &optv, sizeof(optv));
                        if (er != 0) {
                                perror("SockOpt Err:");
                                exit(-1);
                        }
                }
 
                memset(&my_addr, 0, sizeof(struct sockaddr_in)); // clear structure
                my_addr.sin_family = AF_INET;
                my_addr.sin_addr.s_addr = htonl(INADDR_ANY);
                my_addr.sin_port = htons(port);
 
                if (bind(m_skt, (struct sockaddr *)&my_addr, sizeof(my_addr))!=0) {
                        perror("BIND FAILED:");
                        exit(-1);
                }
 
                if (listen(m_skt, 1) != 0) {
                        perror("Listen failed:");
                        exit(-1);
                }
        }
 
public:
        int     m_skt, m_con;
        char    m_txbuf[PIPEBUFLEN], m_rxbuf[PIPEBUFLEN];
        int     m_ilen, m_rxpos, m_txpos, m_uart_wait, m_tx_busy;
        bool    m_started_flag;
 
        PIPECMDR(const int port) : TESTB<VA>() {
                m_con = m_skt = -1;
                setup_listener(port);
                m_rxpos = m_txpos = m_ilen = 0;
                m_started_flag = false;
                m_uart_wait = 0; // Flow control into the FPGA
                m_tx_busy   = 0; // Flow control out of the FPGA
        }
 
        virtual void    kill(void) {
                // Close any active connection
                if (m_con >= 0)  close(m_con);
                if (m_skt >= 0) close(m_skt);
        }
 
        virtual void    tick(void) {
                if (m_con < 0) {
                        // Can we accept a connection?
                        struct  pollfd  pb;
 
                        pb.fd = m_skt;
                        pb.events = POLLIN;
                        poll(&pb, 1, 0);
 
                        if (pb.revents & POLLIN) {
                                m_con = accept(m_skt, 0, 0);
 
                                if (m_con < 0)
                                        perror("Accept failed:");
                        }
                }
 
                TESTB<VA>::m_core->i_rx_stb = 0;
 
                if (m_uart_wait == 0) {
                        if (m_ilen > 0) {
                                // Is there a byte in our buffer somewhere?
                                TESTB<VA>::m_core->i_rx_stb = 1;
                                TESTB<VA>::m_core->i_rx_data = m_rxbuf[m_rxpos++];
                                m_ilen--;
                        } else if (m_con > 0) {
                                // Is there a byte to be read here?
                                struct  pollfd  pb;
                                pb.fd = m_con;
                                pb.events = POLLIN;
                                if (poll(&pb, 1, 0) < 0)
                                        perror("Polling error:");
                                if (pb.revents & POLLIN) {
                                        if ((m_ilen =recv(m_con, m_rxbuf, sizeof(m_rxbuf), MSG_DONTWAIT)) > 0) {
                                                m_rxbuf[m_ilen] = '\0';
                                                if (m_rxbuf[m_ilen-1] == '\n') {
                                                        m_rxbuf[m_ilen-1] = '\0';
                                                        printf("< \'%s\'\n", m_rxbuf);
                                                        m_rxbuf[m_ilen-1] = '\n';
                                                } else printf("< \'%s\'\n", m_rxbuf);
                                                TESTB<VA>::m_core->i_rx_stb = 1;
                                                TESTB<VA>::m_core->i_rx_data = m_rxbuf[0];
                                                m_rxpos = 1; m_ilen--;
                                                m_started_flag = true;
                                        } else if (m_ilen < 0) {
                                                // An error occurred, close the connection
                                                // This could also be the
                                                // indication of a simple
                                                // connection close, so we deal
                                                // with this quietly.
                                                // perror("Read error: ");
                                                // fprintf(stderr, "Closing connection\n");
                                                close(m_con);
                                                m_con = -1;
                                        } else { // the connection closed on us
                                                close(m_con);
                                                m_con = -1;
                                        }
                                }
                        } m_uart_wait = (TESTB<VA>::m_core->i_rx_stb)?UARTLEN:0;
                } else {
                        // Still working on transmitting a character
                        m_uart_wait = m_uart_wait - 1;
                }
 
                /*
                if (TESTB<VA>::m_core->i_rx_stb) {
                        putchar(TESTB<VA>::m_core->i_rx_data);
                        fflush(stdout);
                }
                */
                TESTB<VA>::tick();
 
                bool tx_accepted = false;
                if (m_tx_busy == 0) {
                        if ((TESTB<VA>::m_core->o_tx_stb)&&(m_con > 0)) {
                                m_txbuf[m_txpos++] = TESTB<VA>::m_core->o_tx_data;
                                tx_accepted = true;
                                if ((TESTB<VA>::m_core->o_tx_data == '\n')||(m_txpos >= sizeof(m_txbuf))) {
                                        int     snt = 0;
                                        snt = send(m_con, m_txbuf, m_txpos, 0);
                                        if (snt < 0) {
                                                close(m_con);
                                                m_con = -1;
                                                snt = 0;
                                        }
                                        m_txbuf[m_txpos] = '\0';
                                        printf("> %s", m_txbuf);
                                        if (snt < m_txpos) {
                                                fprintf(stderr, "Only sent %d bytes of %d!\n",
                                                        snt, m_txpos);
                                        }
                                        m_txpos = 0;
                                }
                        }
                } else
                        m_tx_busy--;
 
                if ((TESTB<VA>::m_core->o_tx_stb)&&(TESTB<VA>::m_core->i_tx_busy==0))
                        m_tx_busy = UARTLEN;
                TESTB<VA>::m_core->i_tx_busy = (m_tx_busy != 0);
 
                if (0) {
                        if ((m_tx_busy!=0)||(TESTB<VA>::m_core->i_tx_busy)
                                ||(TESTB<VA>::m_core->o_tx_stb)
                                ||(tx_accepted))
                                printf("%4d %d %d %02x %s\n",
                                        m_tx_busy,
                                        TESTB<VA>::m_core->i_tx_busy,
                                        TESTB<VA>::m_core->o_tx_stb,
                                        TESTB<VA>::m_core->o_tx_data,
                                        (tx_accepted)?"READ!":"");
                }
 
 
                /*
                if((TESTB<VA>::m_core->o_wb_cyc)||(TESTB<VA>::m_core->o_wb_stb)){
                        printf("BUS: %d,%d,%d %8x %8x\n",
                                TESTB<VA>::m_core->o_wb_cyc,
                                TESTB<VA>::m_core->o_wb_stb,
                                TESTB<VA>::m_core->o_wb_we,
                                TESTB<VA>::m_core->o_wb_addr,
                                TESTB<VA>::m_core->o_wb_data);
                } else if (m_started_flag) {
                        printf("%02x,%c,%d,%d,%02x -> %d,%d,%d, %2x,%2x,%2x\n",
                                TESTB<VA>::m_core->i_rx_data,
                                (TESTB<VA>::m_core->i_rx_stb)?(TESTB<VA>::m_core->i_rx_data):' ',
                                TESTB<VA>::m_core->v__DOT__decodewb__DOT__r_valid,
                                TESTB<VA>::m_core->v__DOT__decodewb__DOT__rx_eol,
                                TESTB<VA>::m_core->v__DOT__decodewb__DOT__rx_six_bits,
                                //
                                TESTB<VA>::m_core->v__DOT__decodewb__DOT__o_rq_strobe,
                                TESTB<VA>::m_core->v__DOT__decodewb__DOT__o_rq_hold,
                                TESTB<VA>::m_core->v__DOT__decodewb__DOT__o_rq_we,
                                //
                                TESTB<VA>::m_core->v__DOT__decodewb__DOT__state,
                                TESTB<VA>::m_core->v__DOT__decodewb__DOT__nreg,
                                TESTB<VA>::m_core->v__DOT__decodewb__DOT__szreg);
                }
                */
        }
};
 
#endif

Line No.	Rev	Author	Line
1	75	dgisselq	`////////////////////////////////////////////////////////////////////////////////`
2	4	dgisselq	`//`
3			`// Filename: pipecmdr.h`
4			`//`
5	75	dgisselq	`// Project: XuLA2-LX25 SoC based upon the ZipCPU`
6	4	dgisselq	`//`
7			`// Purpose: This program attaches to a Verilated Verilog IP core.`
8			`// It will not work apart from such a core. Once attached,`
9	75	dgisselq	`// it connects the simulated core to a controller via a pipe interface`
10			`// designed to act like a UART. Indeed, it is hoped that the final`
11			`// interface would be via UART. Until that point, however, this is just`
12			`// a simple test facility designed to verify that the IP core works`
13			`// prior to such actual hardware implementation.`
14	4	dgisselq	`//`
15	75	dgisselq	`// Creator: Dan Gisselquist, Ph.D.`
16			`// Gisselquist Technology, LLC`
17	4	dgisselq	`//`
18	75	dgisselq	`////////////////////////////////////////////////////////////////////////////////`
19	4	dgisselq	`//`
20	75	dgisselq	`// Copyright (C) 2015-2016, Gisselquist Technology, LLC`
21	4	dgisselq	`//`
22	75	dgisselq	`// This program is free software (firmware): you can redistribute it and/or`
23			`// modify it under the terms of the GNU General Public License as published`
24			`// by the Free Software Foundation, either version 3 of the License, or (at`
25			`// your option) any later version.`
26			`//`
27			`// This program is distributed in the hope that it will be useful, but WITHOUT`
28			`// ANY WARRANTY; without even the implied warranty of MERCHANTIBILITY or`
29			`// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License`
30			`// for more details.`
31			`//`
32			`// You should have received a copy of the GNU General Public License along`
33			`// with this program. (It's in the $(ROOT)/doc directory, run make with no`
34			`// target there if the PDF file isn't present.) If not, see`
35			`// <http://www.gnu.org/licenses/> for a copy.`
36			`//`
37			`// License: GPL, v3, as defined and found on www.gnu.org,`
38			`// http://www.gnu.org/licenses/gpl.html`
39			`//`
40			`//`
41			`////////////////////////////////////////////////////////////////////////////////`
42			`//`
43			`//`
44	4	dgisselq	`#ifndef PIPECMDR_H`
45			`#define PIPECMDR_H`
46
47			`#include <sys/types.h>`
48			`#include <sys/socket.h>`
49			`#include <poll.h>`
50			`#include <unistd.h>`
51			`#include <arpa/inet.h>`
52
53			`#include "testb.h"`
54
55			`#define PIPEBUFLEN 256`
56
57			`// At 115200 Baud, 8 bits of data, no parity and one stop bit, there will`
58			`// bit ten bits per character and therefore 8681 clocks per transfer`
59			`// 8681 ~= 100 MHz / 115200 (bauds / second) * 10 bauds / character`
60			`//`
61			`// #define UARTLEN 8681 // Minimum ticks per character, 115200 Baud`
62			`//`
63			`// At 4MBaud, each bit takes 25 clocks. 10 bits would thus take 250 clocks`
64			`//`
65	47	dgisselq	`// #define UARTLEN 250 // Minimum ticks per character, 4M Baud`
66			`// #define UARTLEN 1000 // Minimum ticks per character, 1M Hz`
67	4	dgisselq	`// #define UARTLEN 8 // Minimum ticks per character`
68	47	dgisselq	`#define UARTLEN 4096 //`
69	4	dgisselq
70			`template <class VA> class PIPECMDR : public TESTB<VA> {`
71			`void setup_listener(const int port) {`
72			`struct sockaddr_in my_addr;`
73
74			`printf("Listening on port %d\n", port);`
75
76			`m_skt = socket(AF_INET, SOCK_STREAM, 0);`
77			`if (m_skt < 0) {`
78			`perror("Could not allocate socket: ");`
79			`exit(-1);`
80			`}`
81
82			`// Set the reuse address option`
83			`{`
84			`int optv = 1, er;`
85			`er = setsockopt(m_skt, SOL_SOCKET, SO_REUSEADDR, &optv, sizeof(optv));`
86			`if (er != 0) {`
87			`perror("SockOpt Err:");`
88			`exit(-1);`
89			`}`
90			`}`
91
92			`memset(&my_addr, 0, sizeof(struct sockaddr_in)); // clear structure`
93			`my_addr.sin_family = AF_INET;`
94			`my_addr.sin_addr.s_addr = htonl(INADDR_ANY);`
95			`my_addr.sin_port = htons(port);`
96
97			`if (bind(m_skt, (struct sockaddr *)&my_addr, sizeof(my_addr))!=0) {`
98			`perror("BIND FAILED:");`
99			`exit(-1);`
100			`}`
101
102			`if (listen(m_skt, 1) != 0) {`
103			`perror("Listen failed:");`
104			`exit(-1);`
105			`}`
106			`}`
107
108			`public:`
109			`int m_skt, m_con;`
110			`char m_txbuf[PIPEBUFLEN], m_rxbuf[PIPEBUFLEN];`
111	47	dgisselq	`int m_ilen, m_rxpos, m_txpos, m_uart_wait, m_tx_busy;`
112	4	dgisselq	`bool m_started_flag;`
113
114			`PIPECMDR(const int port) : TESTB<VA>() {`
115			`m_con = m_skt = -1;`
116			`setup_listener(port);`
117			`m_rxpos = m_txpos = m_ilen = 0;`
118			`m_started_flag = false;`
119	47	dgisselq	`m_uart_wait = 0; // Flow control into the FPGA`
120			`m_tx_busy = 0; // Flow control out of the FPGA`
121	4	dgisselq	`}`
122
123			`virtual void kill(void) {`
124			`// Close any active connection`
125			`if (m_con >= 0) close(m_con);`
126			`if (m_skt >= 0) close(m_skt);`
127			`}`
128
129			`virtual void tick(void) {`
130			`if (m_con < 0) {`
131			`// Can we accept a connection?`
132			`struct pollfd pb;`
133
134			`pb.fd = m_skt;`
135			`pb.events = POLLIN;`
136			`poll(&pb, 1, 0);`
137
138			`if (pb.revents & POLLIN) {`
139			`m_con = accept(m_skt, 0, 0);`
140
141			`if (m_con < 0)`
142			`perror("Accept failed:");`
143			`}`
144			`}`
145
146			`TESTB<VA>::m_core->i_rx_stb = 0;`
147
148			`if (m_uart_wait == 0) {`
149			`if (m_ilen > 0) {`
150			`// Is there a byte in our buffer somewhere?`
151			`TESTB<VA>::m_core->i_rx_stb = 1;`
152			`TESTB<VA>::m_core->i_rx_data = m_rxbuf[m_rxpos++];`
153			`m_ilen--;`
154			`} else if (m_con > 0) {`
155			`// Is there a byte to be read here?`
156			`struct pollfd pb;`
157			`pb.fd = m_con;`
158			`pb.events = POLLIN;`
159			`if (poll(&pb, 1, 0) < 0)`
160			`perror("Polling error:");`
161			`if (pb.revents & POLLIN) {`
162			`if ((m_ilen =recv(m_con, m_rxbuf, sizeof(m_rxbuf), MSG_DONTWAIT)) > 0) {`
163			`m_rxbuf[m_ilen] = '\0';`
164			`if (m_rxbuf[m_ilen-1] == '\n') {`
165			`m_rxbuf[m_ilen-1] = '\0';`
166			`printf("< \'%s\'\n", m_rxbuf);`
167			`m_rxbuf[m_ilen-1] = '\n';`
168			`} else printf("< \'%s\'\n", m_rxbuf);`
169			`TESTB<VA>::m_core->i_rx_stb = 1;`
170			`TESTB<VA>::m_core->i_rx_data = m_rxbuf[0];`
171			`m_rxpos = 1; m_ilen--;`
172			`m_started_flag = true;`
173			`} else if (m_ilen < 0) {`
174			`// An error occurred, close the connection`
175	37	dgisselq	`// This could also be the`
176			`// indication of a simple`
177			`// connection close, so we deal`
178			`// with this quietly.`
179			`// perror("Read error: ");`
180			`// fprintf(stderr, "Closing connection\n");`
181	4	dgisselq	`close(m_con);`
182			`m_con = -1;`
183			`} else { // the connection closed on us`
184			`close(m_con);`
185			`m_con = -1;`
186			`}`
187			`}`
188			`} m_uart_wait = (TESTB<VA>::m_core->i_rx_stb)?UARTLEN:0;`
189			`} else {`
190			`// Still working on transmitting a character`
191			`m_uart_wait = m_uart_wait - 1;`
192			`}`
193
194			`/*`
195			`if (TESTB<VA>::m_core->i_rx_stb) {`
196			`putchar(TESTB<VA>::m_core->i_rx_data);`
197			`fflush(stdout);`
198			`}`
199			`*/`
200			`TESTB<VA>::tick();`
201
202	47	dgisselq	`bool tx_accepted = false;`
203			`if (m_tx_busy == 0) {`
204			`if ((TESTB<VA>::m_core->o_tx_stb)&&(m_con > 0)) {`
205			`m_txbuf[m_txpos++] = TESTB<VA>::m_core->o_tx_data;`
206			`tx_accepted = true;`
207			`if ((TESTB<VA>::m_core->o_tx_data == '\n')\|\|(m_txpos >= sizeof(m_txbuf))) {`
208			`int snt = 0;`
209			`snt = send(m_con, m_txbuf, m_txpos, 0);`
210	75	dgisselq	`if (snt < 0) {`
211			`close(m_con);`
212			`m_con = -1;`
213			`snt = 0;`
214			`}`
215	47	dgisselq	`m_txbuf[m_txpos] = '\0';`
216			`printf("> %s", m_txbuf);`
217			`if (snt < m_txpos) {`
218	75	dgisselq	`fprintf(stderr, "Only sent %d bytes of %d!\n",`
219			`snt, m_txpos);`
220	47	dgisselq	`}`
221			`m_txpos = 0;`
222	4	dgisselq	`}`
223			`}`
224	47	dgisselq	`} else`
225			`m_tx_busy--;`
226
227			`if ((TESTB<VA>::m_core->o_tx_stb)&&(TESTB<VA>::m_core->i_tx_busy==0))`
228			`m_tx_busy = UARTLEN;`
229			`TESTB<VA>::m_core->i_tx_busy = (m_tx_busy != 0);`
230
231			`if (0) {`
232			`if ((m_tx_busy!=0)\|\|(TESTB<VA>::m_core->i_tx_busy)`
233			`\|\|(TESTB<VA>::m_core->o_tx_stb)`
234			`\|\|(tx_accepted))`
235			`printf("%4d %d %d %02x %s\n",`
236			`m_tx_busy,`
237			`TESTB<VA>::m_core->i_tx_busy,`
238			`TESTB<VA>::m_core->o_tx_stb,`
239			`TESTB<VA>::m_core->o_tx_data,`
240			`(tx_accepted)?"READ!":"");`
241	4	dgisselq	`}`
242
243	47	dgisselq
244	4	dgisselq	`/*`
245			`if((TESTB<VA>::m_core->o_wb_cyc)\|\|(TESTB<VA>::m_core->o_wb_stb)){`
246			`printf("BUS: %d,%d,%d %8x %8x\n",`
247			`TESTB<VA>::m_core->o_wb_cyc,`
248			`TESTB<VA>::m_core->o_wb_stb,`
249			`TESTB<VA>::m_core->o_wb_we,`
250			`TESTB<VA>::m_core->o_wb_addr,`
251			`TESTB<VA>::m_core->o_wb_data);`
252			`} else if (m_started_flag) {`
253			`printf("%02x,%c,%d,%d,%02x -> %d,%d,%d, %2x,%2x,%2x\n",`
254			`TESTB<VA>::m_core->i_rx_data,`
255			`(TESTB<VA>::m_core->i_rx_stb)?(TESTB<VA>::m_core->i_rx_data):' ',`
256			`TESTB<VA>::m_core->v__DOT__decodewb__DOT__r_valid,`
257			`TESTB<VA>::m_core->v__DOT__decodewb__DOT__rx_eol,`
258			`TESTB<VA>::m_core->v__DOT__decodewb__DOT__rx_six_bits,`
259			`//`
260			`TESTB<VA>::m_core->v__DOT__decodewb__DOT__o_rq_strobe,`
261			`TESTB<VA>::m_core->v__DOT__decodewb__DOT__o_rq_hold,`
262			`TESTB<VA>::m_core->v__DOT__decodewb__DOT__o_rq_we,`
263			`//`
264			`TESTB<VA>::m_core->v__DOT__decodewb__DOT__state,`
265			`TESTB<VA>::m_core->v__DOT__decodewb__DOT__nreg,`
266			`TESTB<VA>::m_core->v__DOT__decodewb__DOT__szreg);`
267			`}`
268			`*/`
269			`}`
270			`};`
271
272			`#endif`

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