Question

Beaglebone black ，使用 PRU ，我必须向二进制代码发送一个事件，这只是循环播放。二进制（程序集）必须理解事件并停止执行将事件发送回PRU_example.c。

PRU_example.c ...

/* Load and execute binary on PRU */
prussdrv_exec_program (PRU_NUM, "./PRU_example.bin");
sleep(1);
?? prussdrv_pru_send_event ( ?? ); //kill PRU_example.bin

PRU_example.p

...
LOOP:
jmp LOOP  // Jump to the lable LOOP
...
HALT

我想使用函数 prussdrv_pru_send_event ，但程序集中的代码如何？

Answer 1

C ++

#define PRU0_R31_VEC_VALID 32    // allows notification of program completion
#define PRU_EVTOUT_0    3        // the event number is sent back

.macro  MOV32
.mparam dst, src
    MOV     dst.w0, src & 0xFFFF
    MOV     dst.w2, src >> 16
.endm

#define temp32reg r10    // temporary register 4bytes

// clear interrupt
MOV32     temp32reg, (0x00000000 | 21)
SBCO      temp32reg, CONST_PRUSSINTC, SICR_OFFSET, 4

LOOP:
...
QBBS    END, r31,30      // Exit when receive an interrupt
JMP LOOP

END:
MOV     R31.b0, PRU0_R31_VEC_VALID | PRU_EVTOUT_0 // Send and output interrupt
HALT

.P

class DownloadFileFromURL extends AsyncTask<Object, String, Integer> {



        @Override
        protected void onPreExecute() {
            super.onPreExecute();


        }


        @Override
        protected void onCancelled() {
            super.onCancelled();

        }

        /**
         * Downloading file in background thread
         * */
        @Override
        protected Integer doInBackground(Object... params) {

            try {

                URL url = new URL((String) params[1]);

                name = ((String) params[1]).substring(((String) params[1])
                        .lastIndexOf("/") + 1);
                // Log.v("log_tag", "name Substring ::: " + name);
                URLConnection conection = url.openConnection();
                conection.connect();
                // getting file length
                int lenghtOfFile = conection.getContentLength();

                // input stream to read file - with 8k buffer
                InputStream input = new BufferedInputStream(url.openStream(),
                        8192);
                File download = new File(Environment.getExternalStorageDirectory()
                        + "/download/");
                if (!download.exists()) {
                    download.mkdir();
                }
                String strDownloaDuRL = download + "/" + name;
                Log.v("log_tag", " down url   " + strDownloaDuRL);
                FileOutputStream output = new FileOutputStream(strDownloaDuRL);

                byte data[] = new byte[1024];

                long total = 0;

                }
                // flushing output
                output.flush();

                // closing streams
                output.close();
                input.close();

            } catch (Exception e) {
                Log.e("Error: ", e.getMessage());
            }
            return 0;

        }




        protected void onPostExecute(String file_url) {

         // Do after downloaded file

        }

    }

Beaglebone：prussdrv_pru_send_event

1 个答案: