hide deprecated code; make USB snippet common for F0/F1/F3

2026-02-28 11:54:30 +03:00 · 2024-09-02 18:21:41 +03:00
parent 9166996bff
commit bdbd7d68d9
419 changed files with 3445 additions and 752 deletions
--- a/F1:F103/deprecated/CDC_ACM/main.c
+++ b/F1:F103/deprecated/CDC_ACM/main.c
@@ -0,0 +1,146 @@
+/*
+ * 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 "proto.h"
+#include "usb.h"
+#include "usb_lib.h"
+
+volatile uint32_t Tms = 0;
+
+/* Called when systick fires */
+void sys_tick_handler(void){
+    ++Tms;
+}
+
+void iwdg_setup(){
+    uint32_t tmout = 16000000;
+    /* Enable the peripheral clock RTC */
+    /* (1) Enable the LSI (40kHz) */
+    /* (2) Wait while it is not ready */
+    RCC->CSR |= RCC_CSR_LSION; /* (1) */
+    while((RCC->CSR & RCC_CSR_LSIRDY) != RCC_CSR_LSIRDY){if(--tmout == 0) break;} /* (2) */
+    /* Configure IWDG */
+    /* (1) Activate IWDG (not needed if done in option bytes) */
+    /* (2) Enable write access to IWDG registers */
+    /* (3) Set prescaler by 64 (1.6ms for each tick) */
+    /* (4) Set reload value to have a rollover each 2s */
+    /* (5) Check if flags are reset */
+    /* (6) Refresh counter */
+    IWDG->KR = IWDG_START; /* (1) */
+    IWDG->KR = IWDG_WRITE_ACCESS; /* (2) */
+    IWDG->PR = IWDG_PR_PR_1; /* (3) */
+    IWDG->RLR = 1250; /* (4) */
+    tmout = 16000000;
+    while(IWDG->SR){if(--tmout == 0) break;} /* (5) */
+    IWDG->KR = IWDG_REFRESH; /* (6) */
+}
+
+#define USBBUF 63
+// usb getline
+static char *get_USB(){
+    static char tmpbuf[USBBUF+1], *curptr = tmpbuf;
+    static int rest = USBBUF;
+    uint8_t x = USB_receive((uint8_t*)curptr);
+    if(!x) return NULL;
+    curptr[x] = 0;
+    if(x == 1 && *curptr == 0x7f){ // backspace
+        if(curptr > tmpbuf){
+            --curptr;
+            USND("\b \b");
+        }
+        return NULL;
+    }
+    USB_sendstr(curptr); // echo
+    if(curptr[x-1] == '\n'){ // || curptr[x-1] == '\r'){
+        curptr = tmpbuf;
+        rest = USBBUF;
+        // omit empty lines
+        if(tmpbuf[0] == '\n') return NULL;
+        // and wrong empty lines
+        if(tmpbuf[0] == '\r' && tmpbuf[1] == '\n') return NULL;
+        return tmpbuf;
+    }
+    curptr += x; rest -= x;
+    if(rest <= 0){ // buffer overflow
+        curptr = tmpbuf;
+        rest = USBBUF;
+    }
+    return NULL;
+}
+
+/* - these functions need for true USB-TTY
+static uint32_t newrate = 0;
+// redefine weak handlers
+void linecoding_handler(usb_LineCoding *lcd){
+    newrate = lcd->dwDTERate;
+}
+static uint16_t cl = 0xffff;
+void clstate_handler(uint16_t val){
+    cl = val;
+}
+static int8_t br = 0;
+void break_handler(){
+    br = 1;
+}*/
+
+int main(void){
+    uint32_t lastT = 0;
+    sysreset();
+    StartHSE();
+    SysTick_Config(72000);
+    hw_setup();
+
+    USBPU_OFF();
+/*    if(RCC->CSR & RCC_CSR_IWDGRSTF){ // watchdog reset occured
+        SEND("WDGRESET=1"); newline();
+    }
+    if(RCC->CSR & RCC_CSR_SFTRSTF){ // software reset occured
+        SEND("SOFTRESET=1"); newline();
+    }*/
+    RCC->CSR |= RCC_CSR_RMVF; // remove reset flags
+
+    USB_setup();
+    iwdg_setup();
+    USBPU_ON();
+
+    while (1){
+        IWDG->KR = IWDG_REFRESH; // refresh watchdog
+        if(Tms - lastT > 499){
+            LED_blink(LED0);
+            lastT = Tms;
+        }
+        usb_proc();
+        char *txt = get_USB();
+        if(txt){
+            IWDG->KR = IWDG_REFRESH;
+            cmd_parser(txt);
+        }
+        /*
+        int n = 0;
+        if(newrate){SEND("new speed: "); printu(newrate); n = 1; newrate = 0;}
+        if(cl!=0xffff){SEND("controls: "); printuhex(cl); n = 1; cl = 0xffff;}
+        if(br){SEND("break"); n = 1; br = 0;}
+        if(n){newline(); transmit_tbuf();}*/
+    }
+    return 0;
+}
+