Added stellaris-vga subproject

1 files changed, 77 insertions, 0 deletions

diff --git a/boards/ek-lm4f120xl/stellaris-vga/main.c b/boards/ek-lm4f120xl/stellaris-vga/main.c
new file mode 100644
index 0000000..81554c7
--- /dev/null
+++ b/boards/ek-lm4f120xl/stellaris-vga/main.c
@@ -0,0 +1,77 @@
+#include "inc/hw_ints.h"
+#include "inc/hw_memmap.h"
+#include "inc/hw_types.h"
+#include "driverlib/debug.h"
+#include "driverlib/fpu.h"
+#include "driverlib/gpio.h"
+#include "driverlib/interrupt.h"
+#include "driverlib/pin_map.h"
+#include "driverlib/rom.h"
+#include "driverlib/sysctl.h"
+#include "driverlib/timer.h"
+#include "utils/uartstdio.h"
+
+void Timer0IntHandlerC()
+{
+  TimerIntClear(TIMER0_BASE, TIMER_TIMA_TIMEOUT);
+  // TIMER0_BASE 0x40030000
+  // TIMER_TIMA_TIMEOUT 0x00000001
+  // TIMER_O_ICR 0x00000024
+
+  // update this reg 0x40030024 = 0x00000001
+
+  __asm__("nop");
+}
+
+void main()
+{
+  /* run at 40 mhz */
+  SysCtlClockSet(SYSCTL_SYSDIV_5 |
+                 SYSCTL_USE_PLL |
+                 SYSCTL_OSC_MAIN |
+                 SYSCTL_XTAL_16MHZ);
+  
+  /* enable led */
+  SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOF);
+  GPIOPinTypeGPIOOutput(GPIO_PORTF_BASE, GPIO_PIN_1);
+  GPIOPinTypeGPIOOutput(GPIO_PORTF_BASE, GPIO_PIN_2);
+  GPIOPinTypeGPIOOutput(GPIO_PORTF_BASE, GPIO_PIN_3);
+  
+  /* enable vga rgb ping */
+  SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOE);
+  GPIOPinTypeGPIOOutput(GPIO_PORTE_BASE, GPIO_PIN_1);   // r
+  GPIOPinTypeGPIOOutput(GPIO_PORTE_BASE, GPIO_PIN_2);   // g
+  GPIOPinTypeGPIOOutput(GPIO_PORTE_BASE, GPIO_PIN_3);   // b
+  GPIOPinTypeGPIOOutput(GPIO_PORTE_BASE, GPIO_PIN_4);   // i
+  
+  /* enable vga sync pins */
+  SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOB);
+  GPIOPinTypeGPIOOutput(GPIO_PORTB_BASE, GPIO_PIN_0);   // vsync
+  GPIOPinTypeGPIOOutput(GPIO_PORTB_BASE, GPIO_PIN_1);   // hsync
+  
+  /* enable & configure timer + interrupt */
+  SysCtlPeripheralEnable(SYSCTL_PERIPH_TIMER0);
+  IntMasterEnable();
+  TimerConfigure(TIMER0_BASE, TIMER_CFG_PERIODIC);
+  TimerLoadSet(TIMER0_BASE,
+               TIMER_A,
+               1056);     /* 26.4us (1056 cycles @ 40 mhz) */
+  IntEnable(INT_TIMER0A);
+  TimerIntEnable(TIMER0_BASE, TIMER_TIMA_TIMEOUT);
+  TimerEnable(TIMER0_BASE, TIMER_A);
+
+  
+  while (1)
+  {
+    /* blink led */
+    int i = 0xffff;
+
+    
+while(i--);
+    GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_1 | GPIO_PIN_2 | GPIO_PIN_3, 0xff);
+    SysCtlDelay(SysCtlClockGet() / 100);
+while(i--);
+    GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_1 | GPIO_PIN_2 | GPIO_PIN_3, 0);
+    SysCtlDelay(SysCtlClockGet() / 100);
+  }
+}