continue developing GPIO config; not tested yet

2026-03-22 01:31:21 +03:00 · 2026-03-09 01:24:02 +03:00
parent d39682b143
commit 9713b10cd4
10 changed files with 470 additions and 38 deletions
--- a/F0:F030,F042,F072/usbcan_gpio/gpio.h
+++ b/F0:F030,F042,F072/usbcan_gpio/gpio.h
@@ -0,0 +1,92 @@
+/*
+ * This file is part of the usbcangpio project.
+ * Copyright 2026 Edward V. Emelianov <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 3 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <stdint.h>
+
+// MODER
+typedef enum{
+    MODE_INPUT = 0,
+    MODE_OUTPUT = 1,
+    MODE_AF = 2,
+    MODE_ANALOG = 3
+} pinmode_t;
+
+// PUPDR
+typedef enum{
+    PULL_NONE = 0,
+    PULL_UP = 1,
+    PULL_DOWN = 2
+} pinpull_t;
+
+// OTYPER
+typedef enum{
+    OUTPUT_PP = 0,
+    OUTPUT_OD = 1
+} pinout_t;
+
+// OSPEEDR
+typedef enum{
+    SPEED_LOW = 0,
+    SPEED_MEDIUM = 1,
+    SPEED_HIGH = 3
+} pinspeed_t;
+
+enum FuncShifts{ // shift 1 by this to get "canUSART" etc; not more than 7!
+    FUNC_USART = 1,
+    FUNC_SPI = 2,
+};
+
+typedef union{
+    struct{
+        uint8_t canADC : 1;
+        uint8_t canUSART : 1;
+        uint8_t canSPI : 1;
+    };
+    uint8_t flags;
+} funcvalues_t;
+
+typedef struct{
+    uint8_t enable : 1; // [immutable!] pin config avialable (==1 for PA0-PA3, PA5-PA7, PA9, PA10, PB0-PB7, PB10, PB11, ==0 for rest)
+    pinmode_t mode : 2;
+    pinpull_t pull : 2;
+    pinout_t otype : 1;
+    pinspeed_t speed : 2;
+    uint8_t af : 3;       // alternate function number (only if mode == MODE_AF)
+    uint8_t monitor : 1;  // monitor changes
+} pinconfig_t;
+
+typedef struct{
+    uint32_t baudrate;
+    uint8_t databits;   // 8 or 9
+    char parity;        // 'N','E','O'
+    uint8_t stopbits;   // 1 or 2
+    uint8_t enabled;    // is USART active (flag `monitor` taken from pinconfig_t also as Rx/Tx enable)
+} usartconfig_t;
+
+typedef struct{
+    uint32_t speed;
+    uint8_t cpol : 1;
+    uint8_t cpha : 1;
+    uint8_t lsbfirst : 1;
+    uint8_t enabled : 1;
+} spiconfig_t;
+
+int is_func_allowed(uint8_t port, uint8_t pin, pinconfig_t *pcfg);
+int gpio_reinit();