diff options
| author | Clyne Sullivan <tullivan99@gmail.com> | 2018-09-25 16:22:47 -0400 |
|---|---|---|
| committer | Clyne Sullivan <tullivan99@gmail.com> | 2018-09-25 16:22:47 -0400 |
| commit | 79da473bd0145afac4c2b395f39f1142444b7cdd (patch) | |
| tree | ed59e0b415a0d826338871096d25d24aac879cc0 /src/main.c | |
initial commit
Diffstat (limited to 'src/main.c')
| -rw-r--r-- | src/main.c | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/src/main.c b/src/main.c new file mode 100644 index 0000000..8028f93 --- /dev/null +++ b/src/main.c @@ -0,0 +1,71 @@ +/**
+ * @file main.c
+ * Entry point for operating system
+ *
+ * Copyright (C) 2018 Clyne Sullivan
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+#include <clock.h>
+#include <gpio.h>
+#include <heap.h>
+#include <stm32l476xx.h>
+#include <task.h>
+
+extern uint8_t __bss_end__;
+
+void kmain(void);
+
+int main(void)
+{
+ asm("cpsid i");
+ // disable cached writes for precise debug info
+ //*((uint32_t *)0xE000E008) |= 2;
+
+ // prepare flash latency for 80MHz operation
+ FLASH->ACR &= ~(FLASH_ACR_LATENCY);
+ FLASH->ACR |= FLASH_ACR_LATENCY_4WS;
+
+ // init core components
+ clock_init();
+ heap_init(&__bss_end__);
+ gpio_init();
+
+ // enable FPU
+ //SCB->CPACR |= (0xF << 20);
+
+ task_init(kmain);
+ while (1);
+}
+
+void task2(void);
+void kmain(void)
+{
+ gpio_mode(GPIOA, 5, OUTPUT);
+ task_start(task2, 512);
+
+ for (int i = 0; i < 8; i++) {
+ gpio_dout(GPIOA, 5, !(i & 1));
+ delay(200);
+ }
+
+ return;
+}
+
+void task2(void)
+{
+ while (1)
+ delay(800);
+}
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