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

2026-02-28 20:04:30 +03:00 · 2024-09-02 18:21:41 +03:00
parent 9166996bff
commit bdbd7d68d9
419 changed files with 3445 additions and 752 deletions
--- a/F0:F030,F042,F072/deprecated/canbus/src/main.c
+++ b/F0:F030,F042,F072/deprecated/canbus/src/main.c
@@ -0,0 +1,148 @@
+/*
+ * 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 "usart.h"
+#include "can.h"
+
+volatile uint32_t Tms = 0;
+
+/* Called when systick fires */
+void sys_tick_handler(void){
+    ++Tms;
+}
+
+void iwdg_setup(){
+    /* 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); /* (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) */
+    while(IWDG->SR); /* (5) */
+    IWDG->KR = IWDG_REFRESH; /* (6) */
+}
+
+int main(void){
+    uint32_t lastT = 0;
+    uint8_t ctr, len;
+    CAN_message *can_mesg;
+    int L;
+    char *txt;
+    sysreset();
+    SysTick_Config(6000, 1);
+    gpio_setup();
+    usart_setup();
+    iwdg_setup();
+    readCANID();
+    CAN_setup();
+
+    SEND("Greetings! My address is ");
+    printuhex(getCANID());
+    newline();
+
+    if(RCC->CSR & RCC_CSR_IWDGRSTF){ // watchdog reset occured
+        SEND("WDGRESET=1\n");
+    }
+    if(RCC->CSR & RCC_CSR_SFTRSTF){ // software reset occured
+        SEND("SOFTRESET=1\n");
+    }
+    RCC->CSR |= RCC_CSR_RMVF; // remove reset flags
+
+    while (1){
+        IWDG->KR = IWDG_REFRESH; // refresh watchdog
+        if(lastT > Tms || Tms - lastT > 499){
+            LED_blink(LED0);
+            lastT = Tms;
+        }
+        can_proc();
+        if(CAN_get_status() == CAN_FIFO_OVERRUN){
+            SEND("CAN bus fifo overrun occured!\n");
+        }
+        can_mesg = CAN_messagebuf_pop();
+        if(can_mesg){ // new data in buff
+            len = can_mesg->length;
+            SEND("got message, len: "); usart_putchar('0' + len);
+            SEND(", data: ");
+            for(ctr = 0; ctr < len; ++ctr){
+                printuhex(can_mesg->data[ctr]);
+                usart_putchar(' ');
+            }
+            newline();
+        }
+        if(usartrx()){ // usart1 received data, store in in buffer
+            L = usart_getline(&txt);
+            char _1st = txt[0];
+            if(L == 2 && txt[1] == '\n'){
+                L = 0;
+                switch(_1st){
+                    case 'C':
+                        can_send_dummy();
+                    break;
+                    case 'G':
+                        SEND("Can address: ");
+                        printuhex(getCANID());
+                        newline();
+                    break;
+                    case 'R':
+                        SEND("Soft reset\n");
+                        NVIC_SystemReset();
+                    break;
+                    case 'S':
+                        CAN_reinit();
+                        SEND("Can address: ");
+                        printuhex(getCANID());
+                        newline();
+                    break;
+                    case 'W':
+                        SEND("Wait for reboot\n");
+                        while(1){nop();};
+                    break;
+                    default: // help
+                        SEND(
+                        "'C' - send dummy byte over CAN\n"
+                        "'G' - get CAN address\n"
+                        "'R' - software reset\n"
+                        "'S' - reinit CAN (with new address)\n"
+                        "'W' - test watchdog\n"
+                        );
+                    break;
+                }
+            }
+        }
+        if(L){ // text waits for sending
+            while(LINE_BUSY == usart_send(txt, L));
+            L = 0;
+        }
+    }
+    return 0;
+}
+