diff options
Diffstat (limited to 'main.c')
| -rw-r--r-- | main.c | 75 |
1 files changed, 0 insertions, 75 deletions
@@ -1,75 +0,0 @@ -#include <stm32l476xx.h>
-#include <clock.h>
-#include <heap.h>
-#include <task.h>
-
-/**
- * Accomplishments:
- * - GPIO in/out
- * - got to 80MHz clock
- * - basic heap
- * - multitask, can exit
- */
-
-void pulse(uint8_t byte);
-void kmain(void);
-
-int main(void)
-{
- asm("cpsid i");
-
- // prepare flash latency for 40MHz operation
- FLASH->ACR &= ~(FLASH_ACR_LATENCY);
- FLASH->ACR |= FLASH_ACR_LATENCY_4WS;
-
- RCC->AHB2ENR |= RCC_AHB2ENR_GPIOAEN; // A clk enable
- GPIOA->MODER &= ~(GPIO_MODER_MODE5 | GPIO_MODER_MODE6); // A5 -> output, A0 input
- GPIOA->MODER |= GPIO_MODER_MODE5_0 | GPIO_MODER_MODE6_0;
- GPIOA->PUPDR &= ~(GPIO_PUPDR_PUPD5 | GPIO_PUPDR_PUPD6);
- GPIOA->PUPDR |= GPIO_PUPDR_PUPD5_0 | GPIO_PUPDR_PUPD6_0; // pulldown for button (1)
- //if (GPIOA->IDR & 0x01)
-
- clock_init();
- task_init(kmain);
-
- while (1);
-}
-
-void task(void);
-void kmain(void)
-{
- asm("cpsie i");
-
- task_start(task, 1024);
- while (1) {
- GPIOA->BSRR |= 1 << 6;
- delay(500);
- GPIOA->BRR |= 1 << 6;
- delay(500);
- }
-}
-
-void task(void)
-{
- while (1) {
- GPIOA->BSRR |= 1 << 5;
- delay(200);
- GPIOA->BRR |= 1 << 5;
- delay(200);
- }
-}
-
-
-void _exit(int code)
-{ for (;;); }
-
-void pulse(uint8_t byte)
-{
- int8_t i = 7;
- do {
- GPIOA->BSRR |= 1 << 5;
- delay((byte & (1 << i)) ? 400 : 100);
- GPIOA->BRR |= 1 << 5;
- delay((byte & (1 << i)) ? 100 : 400);
- } while (--i >= 0);
-}
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