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/F0:F030,F042,F072/morze/main.c
+++ b/F0:F030,F042,F072/morze/main.c
@@ -0,0 +1,122 @@
+/*
+ * 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 <string.h>
+#include "stm32f0.h"
+#include "usart.h"
+#include "morse.h"
+
+volatile uint32_t Tms = 0;
+
+/* Called when systick fires */
+void sys_tick_handler(void){
+    ++Tms;
+}
+
+static void gpio_setup(void){
+    /* Enable clocks to the GPIO subsystems (A&B) */
+    RCC->AHBENR |= RCC_AHBENR_GPIOAEN;
+    /* Set green leds (PA4 & PA6) as output; AF1 to enable timer on PA6 */
+    GPIOA->MODER = GPIO_MODER_MODER4_O | GPIO_MODER_MODER6_AF;
+    GPIOA->AFR[0] |= 1<<24; // AF1
+    GPIOA->OTYPER = 1 << 6; // PA6 - opendrain, PA4 - pushpull
+}
+
+// Tim3_ch1 - PA6, 48MHz -> 1kHz
+static void tim3_setup(){
+    RCC->APB1ENR |= RCC_APB1ENR_TIM3EN; // enable clocking
+    RCC->AHBENR |= RCC_AHBENR_DMA1EN;
+    TIM3->CCMR1 = TIM_CCMR1_OC1M_2 | TIM_CCMR1_OC1M_1; // PWM mode 1: acive->inactive, preload enable
+    TIM3->PSC = 47999; // 1kHz
+    TIM3->ARR = WRD_GAP;
+    TIM3->CCR1 = 0;
+    TIM3->CCER = TIM_CCER_CC1P | TIM_CCER_CC1E; // turn it on, active low
+    TIM3->EGR |= TIM_EGR_UG;
+    // DMA ch3 - TIM3_UP
+    DMA1_Channel3->CPAR = (uint32_t)(&(TIM3->DMAR)); // TIM3_ch1
+    DMA1_Channel3->CMAR = (uint32_t)(mbuff);
+    DMA1_Channel3->CNDTR = 0;
+    // memsiz 16bit, psiz 32bit, memincrement, from memory
+    DMA1_Channel3->CCR |=  DMA_CCR_MSIZE_0 | DMA_CCR_PSIZE_1
+                       | DMA_CCR_MINC | DMA_CCR_DIR;
+    TIM3->DCR = (2 << 8) // three bytes
+                + (((uint32_t)&TIM3->ARR - (uint32_t)&TIM3->CR1) >> 2);
+    TIM3->DIER = TIM_DIER_UDE; // enable DMA requests
+    DMA1_Channel3->CCR |= DMA_CCR_TCIE; // enable TC interrupt
+}
+
+char buftoping[256] = {0}, *nxtltr = buftoping;
+
+int main(void){
+    uint32_t lastT = 0; // last time counter value
+    int L = 0; // length
+    char *txt;
+    sysreset();
+    SysTick_Config(6000, 1);
+    gpio_setup();
+    tim3_setup();
+    USART1_config();
+    int first = 1; // first letter in phrase
+    while (1){
+        if(dmaflag){
+            dmaflag = 0;
+            if(*nxtltr){
+                DMA1_Channel3->CCR &= ~DMA_CCR_EN;
+                while(ALL_OK != usart1_send(nxtltr, 1));
+                uint8_t x;
+                nxtltr = fillbuffer(nxtltr, &x);
+                if(x){
+                    DMA1_Channel3->CNDTR = 3 * x;
+                    DMA1_Channel3->CCR |= DMA_CCR_EN;
+                    //x += '0';
+                    //while(ALL_OK != usart1_send((char*)&x, 1));
+                    if(first){ // first letter in message
+                        first = 0;
+                        TIM3->CR1 |= TIM_CR1_CEN;
+                        TIM3->EGR |= TIM_EGR_UG; // force update generation
+                    }
+                }
+            }else{
+                TIM3->CR1 &= ~TIM_CR1_CEN; // turn timer off
+                first = 1;
+            }
+        }
+        if(lastT > Tms || Tms - lastT > 499){
+            pin_toggle(GPIOA, 1<<4); // blink by onboard LED once per second
+            lastT = Tms;
+        }
+        if(usart1rx()){ // usart1 received data, store in in buffer
+            L = usart1_getline(&txt);
+            if(L < 256 && !*nxtltr){
+                memcpy(buftoping, txt, L);
+                buftoping[L] = 0;
+                nxtltr = buftoping;
+                dmaflag = 1; //
+                usart1_send("Send ", 5);
+                while(ALL_OK != usart1_send(txt, L));
+            }else usart1_send("Please, wait\n", 13);
+        }
+       /* if(L){ // text waits for sending
+            if(ALL_OK == usart1_send(txt, L)){
+                L = 0;
+            }
+        }*/
+    }
+}