restructuring

2026-02-28 11:54:30 +03:00 · 2022-03-10 11:04:14 +03:00
parent 29560b7c0c
commit 733dbd75d2
1758 changed files with 14 additions and 26855 deletions
--- a/F1:F103/SPI/main.c
+++ b/F1:F103/SPI/main.c
@@ -0,0 +1,100 @@
+/*
+ * main.c
+ *
+ * Copyright 2017 Edward V. Emelianoff <eddy@sao.ru, edward.emelianoff@gmail.com>
+ *
+ * This program is free software; 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 2 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
+ * MERCHANTABILITY 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; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301, USA.
+ */
+#include "hardware.h"
+#include "spi.h"
+#include "usb.h"
+#include "usb_lib.h"
+
+volatile uint32_t Tms = 0;
+
+/* Called when systick fires */
+void sys_tick_handler(void){
+    ++Tms;
+}
+
+char *parse_cmd(char *buf){
+    const uint8_t array[] = {0xf0, 0xa5, 0x5a, 0x0f};
+    if(buf[1] != '\n') return buf;
+    switch(*buf){
+        case 'D':
+            if(SPI_transmit(array, 4)) USB_send("Error in DMA transmission\n");
+            else USB_send("Transmitted\n");
+        break;
+        case 'S':
+            if(SPI1->SR & SPI_SR_TXE){
+                *(uint8_t *)&(SPI1->DR) = 0xa5;
+                USB_send("sent 0xa5\n");
+            }else USB_send("SR_TXE isn't empty\n");
+        break;
+        default: // help
+            return
+            "'S' - send 0xa5 directly\n"
+            "'D' - send 4 bytes by DMA\n"
+            ;
+        break;
+    }
+    return NULL;
+}
+
+// usb getline
+char *get_USB(){
+    static char tmpbuf[512], *curptr = tmpbuf;
+    static int rest = 511;
+    int x = USB_receive(curptr, rest);
+    curptr[x] = 0;
+    if(!x) return NULL;
+    if(curptr[x-1] == '\n'){
+        curptr = tmpbuf;
+        rest = 511;
+        return tmpbuf;
+    }
+    curptr += x; rest -= x;
+    if(rest <= 0){ // buffer overflow
+        curptr = tmpbuf;
+        rest = 511;
+    }
+    return NULL;
+}
+
+int main(void){
+    uint32_t lastT = 0;
+    sysreset();
+    StartHSE();
+    SysTick_Config(72000);
+    hw_setup();
+    USB_setup();
+
+    while (1){
+        if(lastT > Tms || Tms - lastT > 499){
+            pin_toggle(GPIOA, (1<<6));
+            LED_blink(LED0);
+            lastT = Tms;
+        }
+        usb_proc();
+        char *txt, *ans;
+        if((txt = get_USB())){
+            ans = parse_cmd(txt);
+            if(ans) USB_send(ans);
+        }
+    }
+    return 0;
+}
+