Got a basic timer to work.

1 files changed, 34 insertions, 0 deletions

diff --git a/src/kern/main.c b/src/kern/main.c
index 2b97197..082d450 100644
--- a/src/kern/main.c
+++ b/src/kern/main.c
@@ -2,6 +2,7 @@
 #include "arch/arm/cortex-m4/mpu.h"
 #include "arch/stm32l4xxx/peripherals/clock.h"
 #include "arch/stm32l4xxx/peripherals/dma.h"
+#include "arch/stm32l4xxx/peripherals/tim.h"
 #include "arch/stm32l4xxx/peripherals/exti.h"
 #include "arch/stm32l4xxx/peripherals/irq.h"
 #include "arch/stm32l4xxx/peripherals/rcc.h"
@@ -23,6 +24,15 @@
 #include "kern/systick/systick_manager.h"
 #include "user/syscall.h"
 
+void on_exti9_5()
+{
+  klogf("Exit Interrupt!\n");
+  klogf("Pending Reg_again: %p\n", EXTI.p_r1);
+  klogf("Write: %p\n", (1 << 6));
+  EXTI.p_r1 |= 1 << 6;
+  klogf("Pending Reg_again: %p\n", EXTI.p_r1);
+}
+
 void on_hard_fault()
 {
   panic("Hard fault encountered!\n");
@@ -81,6 +91,15 @@ static uint32_t bytescale(uint32_t n, uint32_t sc)
   return n * sc / 255;
 }
 
+void on_tim2()
+{
+  if (regget(TIM2.s_r, tim_uif)) {
+    regset(TIM2.s_r, tim_uif, 0);
+  }
+
+  klogf("Tim2 Update\n");
+}
+
 /* Main function. This gets executed from the interrupt vector defined above. */
 int main()
 {
@@ -88,6 +107,21 @@ int main()
 
   klogf("Entering main\n");
 
+  klogf("Enable ir\n");
+  enable_interrupt(IRQ_TIM2);
+  klogf("Enable clock\n");
+  regset(RCC.apb1en1_r, rcc_tim2en, 1);
+  klogf("psc\n");
+  TIM2.psc = 39999; /* Counts every half millisecond. */
+  klogf("ar_r\n");
+  TIM2.ar_r = 1000;
+  klogf("die_r\n");
+  regset(TIM2.die_r, tim_uie, 1);
+  klogf("eg_r\n");
+  regset(TIM2.eg_r, tim_ug, 1);
+  klogf("c_r1\n");
+  regset(TIM2.c_r1, tim_cen, 1);
+
   int ec;
   gpio_reserved_pin_t sysled = get_sysled();