add SSI->SPI on NUCLEO042

2026-02-28 20:04:30 +03:00 · 2022-07-08 14:48:53 +03:00
parent 6f29257a28
commit 52236f2cf1
20 changed files with 8112 additions and 4 deletions
--- a/F0:F030,F042,F072/NUCLEO_SPI/main.c
+++ b/F0:F030,F042,F072/NUCLEO_SPI/main.c
@@ -0,0 +1,101 @@
+/*
+ * 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 <stm32f0.h>
+#include "spi.h"
+#include "usart.h"
+
+volatile uint32_t Tms = 0;
+
+/* Called when systick fires */
+void sys_tick_handler(void){
+    ++Tms;
+}
+
+static void gpio_setup(void){
+    // Set green led (PB3) as output - no, PB3 is SCK!
+    //RCC->AHBENR |= RCC_AHBENR_GPIOBEN;
+    //GPIOB->MODER = GPIO_MODER_MODER3_O;
+}
+
+static void printuhex(uint8_t *arr, uint8_t l){
+    if(l > 32 || l == 0) return;
+    char buf[70] = "0x";
+    int8_t i, j, bidx = 2;
+    for(i = 0; i < l; ++i, ++arr){
+        for(j = 1; j > -1; --j){
+            uint8_t half = (*arr >> (4*j)) & 0x0f;
+            if(half < 10) buf[bidx++] = half + '0';
+            else buf[bidx++] = half - 10 + 'a';
+        }
+    }
+    buf[bidx++] = '\n';
+    SEND(buf, bidx);
+}
+
+static void print14bit(uint8_t *arr){
+    uint8_t _16[2];
+    _16[0] = (arr[0]>>4)&3; _16[1] = (arr[0]<<4) | (arr[1] >> 4);
+    printuhex(_16, 2);
+    //SEND("\n\n", 2);
+}
+
+int main(void){
+    uint32_t /*lastT = 0,*/ dctr = 0;
+    int16_t L = 0;
+    uint8_t buf[SPIBUFSZ], len;
+    char *txt;
+    sysreset();
+    SysTick_Config(6000, 1);
+    gpio_setup();
+    spi_setup();
+    usart2_setup();
+
+    while (1){
+       /* if(Tms - lastT > 499){
+            pin_toggle(GPIOB, 1<<3); // blink by onboard LED once per second
+            lastT = Tms;
+        }*/
+
+        if(usart2rx()){ // usart1 received data, store in in buffer
+            L = usart2_getline(&txt);
+            // do something with received data
+        }
+        if(L){ // text waits for sending
+            if(ALL_OK == usart2_send(txt, L)){
+                L = 0;
+            }
+        }
+        len = SPIBUFSZ;
+        uint8_t a = SPI_getdata(buf, &len);
+        if(a){
+            //printuhex(buf, len);
+            print14bit(buf);
+        }
+        if(Tms - dctr > 999){// once per 1 second
+            dctr = Tms;
+            //SEND("pre\n", 4);
+            SPI_prep_receive();
+        }
+    }
+    return 0;
+}
+