Added system-clock files including the genmake script.

1 files changed, 183 insertions, 0 deletions

diff --git a/system-clock/main.c b/system-clock/main.c
new file mode 100644
index 0000000..f7a30e8
--- /dev/null
+++ b/system-clock/main.c
@@ -0,0 +1,183 @@
+#include "gpio.h"
+
+int main();
+
+void spin();
+
+/*
+ * Interrupt service routine handlers.
+ */
+const void* vectors[] __attribute__((section(".vectors"))) = {
+  (void *) 0x2000c000, /* Top of stack at top of sram1. 48k */
+  main,                /* Reset handler */
+  spin,        /* NMI */
+  spin,        /* Hard Fault */
+  spin,        /* MemManage */
+  spin,        /* BusFault  */
+  spin,        /* UsageFault */
+  spin,        /* Reserved */ 
+  spin,        /* Reserved */
+  spin,        /* Reserved */
+  spin,        /* Reserved */
+  spin,        /* SVCall */
+  spin,        /* Debug */
+  spin,        /* Reserved */
+  spin,        /* PendSV */
+  spin,        /* SysTick */	
+
+/* External interrupt handlers follow */
+  spin,        /* 0 WWDG */
+  spin,        /* 1 PVD */
+  spin,        /* 2 TAMP_SAMP */
+  spin,        /* 3 RTC_WKUP */
+  spin,        /* 4 FLASH */
+  spin,        /* 5 RCC */
+  spin,        /* 6 EXTI0 */
+  spin,        /* 7 EXTI1 */
+  spin,        /* 8 EXTI2 */
+  spin,        /* 9 EXTI3 */
+  spin,        /* 10 EXTI4 */
+  spin,        /* 11 DMA_CH1 */
+  spin,        /* 12 DMA_CH2 */
+  spin,        /* 13 DMA_CH3 */
+  spin,        /* 14 DMA_CH4 */
+  spin,        /* 15 DMA_CH5 */
+  spin,        /* 16 DMA_CH6 */
+  spin,        /* 17 DMA_CH7 */
+  spin,        /* 18 ADC1 */
+  spin,        /* 19 CAN_TX */
+  spin,        /* 20 CAN_RX0 */
+  spin,        /* 21 CAN_RX1 */
+  spin,        /* 22 CAN_SCE */
+  spin,        /* 23 EXTI9_5 */
+  spin,        /* 24 TIM1_BRK/TIM15 */
+  spin,        /* 25 TIM1_UP/TIM16 */
+  spin,        /* 26 TIM1_TRG_COM */
+  spin,        /* 27 TIM1_CC */
+  spin,        /* 28 TIM2 */
+  spin,        /* 29 Reserved */
+  spin,        /* 30 Reserved */
+  spin,        /* 31 I2C1_EV */
+  spin,        /* 32 I2C1_ER */
+  spin,        /* 33 I2C2_EV */
+  spin,        /* 34 I2C2_ER */
+  spin,        /* 35 SPI1 */
+  spin,        /* 36 SPI2 */
+  spin,        /* 37 USART1 */
+  spin,        /* 38 USART2 */
+  spin,        /* 39 USART3 */
+  spin,        /* 40 EXTI15_10 */
+  spin,        /* 41 RTCAlarm */
+  spin,        /* 42 Reserved */
+  spin,        /* 43 Reserved */
+  spin,        /* 44 Reserved */
+  spin,        /* 45 Reserved */
+  spin,        /* 46 Reserved */
+  spin,        /* 47 Reserved */
+  spin,        /* 48 Reserved */
+  spin,        /* 49 SDMMC1 */
+  spin,        /* 50 Reserved */
+  spin,        /* 51 SPI3 */
+  spin,        /* 52 Reserved */
+  spin,        /* 53 Reserved */
+  spin,        /* 54 TIM6_DACUNDER */
+  spin,        /* 55 TIM7 */
+  spin,        /* 56 DMA2_CH1 */
+  spin,        /* 57 DMA2_CH2 */
+  spin,        /* 58 DMA2_CH3 */
+  spin,        /* 59 DMA2_CH4 */
+  spin,        /* 60 DMA2_CH5 */
+  spin,        /* 61 Reserved */
+  spin,        /* 62 Reserved */
+  spin,        /* 63 Reserved*/
+  spin,        /* 64 COMP */
+  spin,        /* 65 LPTIM1 */
+  spin,        /* 66 LPTIM2 */
+  spin,        /* 67 USB_FS */
+  spin,        /* 68 DMA_CH6 */
+  spin,        /* 69 DMA_CH7 */
+  spin,        /* 70 LPUART1 */
+  spin,        /* 71 QUADSPI */
+  spin,        /* 72 I2C3_EV */
+  spin,        /* 73 I2C3_ER */
+  spin,        /* 74 SAI1 */
+  spin,        /* 75 Reserved */
+  spin,        /* 76 SWPMI1 */
+  spin,        /* 77 TSC */
+  spin,        /* 78 Reserved */
+  spin,        /* 79 AES */
+  spin,        /* 80 RNG */
+  spin,        /* 81 FPU */
+  spin         /* 82 CRS */
+};
+
+/* Delay for some number of iterations. */
+void delay(uint32_t itrs)
+{
+  /* Need to keep the compiler from optimizing this loop out entirely. */
+  while(itrs --) {
+    asm volatile ("");
+  }
+}
+
+/* Main function. This gets executed from the interrupt vector defined above. */
+int main()
+{
+  /* Enable the GPIO port B. */
+
+  __IO gpio_port_t* port_b = enable_gpio(GPIO_PORT_B);
+  gpio_output_pin_t pin3 = set_gpio_pin_output(port_b, PIN_3);
+  gpio_output_pin_t pin1 = set_gpio_pin_output(port_b, PIN_1);
+
+  while(1) {
+    /* Set the GPIO pin to high. */
+    pin_on(pin3);
+    pin_off(pin1);
+    delay(65535);
+    delay(65535);
+    delay(65535);
+    delay(65535);
+    delay(65535);
+    delay(65535);
+    delay(65535);
+    delay(65535);
+    delay(65535);
+    delay(65535);
+
+    /* Set the GPIO pin to low. */
+    pin_off(pin3);
+    pin_on(pin1);
+    delay(65535);
+    delay(65535);
+    delay(65535);
+    delay(65535);
+    delay(65535);
+    delay(65535);
+    delay(65535);
+    delay(65535);
+    delay(65535);
+    delay(65535);
+  }
+}
+
+/*
+ * Does nothing ... forever.
+ */
+void spin()
+{
+  __IO gpio_port_t* port_b = enable_gpio(GPIO_PORT_B);
+  gpio_output_pin_t pin3 = set_gpio_pin_output(port_b, PIN_3);
+  for(;;) {
+
+    /* Flash in a distinct pattern to know that something went wrong. */
+
+    pin_off(pin3);
+    delay(100000);
+    pin_on(pin3);
+    delay(100000);
+    pin_off(pin3);
+    delay(100000);
+    pin_on(pin3);
+    delay(500000);
+  }
+}