diff options
Diffstat (limited to 'src/cpu')
| -rw-r--r-- | src/cpu/irq.c | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/src/cpu/irq.c b/src/cpu/irq.c index 442c834..125c3a6 100644 --- a/src/cpu/irq.c +++ b/src/cpu/irq.c @@ -15,10 +15,15 @@ void handle_data(unsigned char); void c_irq_handler(void) { unsigned long source = load32(CORE0_IRQ_SOURCE); + // Check if GPU Interrupt if (source & (1 << 8)) { + // Check if UART Interrupt if(load32(IRQ_PENDING2) & (1 << 25)) { + // Check if UART Interrupt is Masked if(load32(UART0_MIS) & (1<<4)) { + // Get the UART data unsigned long data = load32(UART0_DR); + // Draw it on the screen { unsigned int x = g_Drawer.x; unsigned int y = g_Drawer.y; @@ -29,6 +34,7 @@ void c_irq_handler(void) g_Drawer.y = y; } + // Handle the recieved data // Ctrl+T to toggle timer if(data == 0x14) { unsigned long timer_status; @@ -50,19 +56,25 @@ void c_irq_handler(void) } g_Drawer.x = x; g_Drawer.y = y; - } else { + } + // Add task to handle the data + else { add_thread(handle_data, (void*)data, 1); } return; } - } else if (*(unsigned long*)SYS_TIMER_CS == SYS_TIMER_SC_M0) { + } + // Check if System Time Compare 0 Triggered the Interrupt + else if (*(unsigned long*)SYS_TIMER_CS == SYS_TIMER_SC_M0) { volatile unsigned long* timer_cs = (unsigned long*)SYS_TIMER_CS; volatile unsigned long* timer_chi = (unsigned long*)SYS_TIMER_CHI; volatile unsigned long* nexttime = (unsigned long*)SYS_TIMER_C0; *timer_cs = SYS_TIMER_SC_M0; *nexttime = *timer_chi + 60000000; } - } else if (source & (1 << 3)) { + } + // Check if CNTV triggered the interrupt + else if (source & (1 << 3)) { c_timer(); return; } @@ -73,6 +85,7 @@ static unsigned long counter = 0; unsigned long c_fiq_handler(void) { unsigned long source = load32(CORE0_FIQ_SOURCE); + // Check if CNTV triggered the interrupt if (source & (1 << 3)) { c_timer(); counter++; |