electronics
/
libopencm3
9
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

enhanced cmsis again for other efm32tg examples

This commit is contained in:
chrysn 2012-04-29 00:18:03 +02:00
parent 4a36d23d8c
commit 9324f00038
1 changed files with 22 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

28
include/libopencmsis/core_cm3.h
View File

@ -127,10 +127,21 @@ typedef struct
* the generic cm3 functionality is moved out from stm32 and can be used here
* easily (systick_set_reload, systick_interrupt_enable, systick_counter_enable
* and systick_set_clocksource).
*
* modified for CMSIS style array as the powertest example needs it.
* */
#define SYS_TICK_BASE (SCS_BASE + 0x0010)
#define STK_LOAD MMIO32(SYS_TICK_BASE + 0x04)
#define STK_CTRL MMIO32(SYS_TICK_BASE + 0x00)
/* from d0002_efm32_cortex-m3_reference_manual.pdf section 4.4 */
typedef struct
{
uint32_t CTRL;
uint32_t LOAD;
uint32_t VAL;
uint32_t CALIB;
} SysTick_TypeDef;
#define SysTick ((SysTick_TypeDef *) SYS_TICK_BASE)
#define STK_CTRL_TICKINT (1 << 1)
#define STK_CTRL_ENABLE (1 << 0)
@ -139,13 +150,13 @@ typedef struct
static inline uint32_t SysTick_Config(uint32_t n_ticks)
{
if (n_ticks & ~0x00FFFFFF) return 1;
STK_LOAD = n_ticks;
SysTick->LOAD = n_ticks;
STK_CTRL |= (STK_CTRL_CLKSOURCE_AHB << STK_CTRL_CLKSOURCE_LSB);
SysTick->CTRL |= (STK_CTRL_CLKSOURCE_AHB << STK_CTRL_CLKSOURCE_LSB);
STK_CTRL |= STK_CTRL_TICKINT;
SysTick->CTRL |= STK_CTRL_TICKINT;
STK_CTRL |= STK_CTRL_ENABLE;
SysTick->CTRL |= STK_CTRL_ENABLE;
return 0;
}
@ -172,4 +183,9 @@ typedef struct
#define ADC0_IRQHandler adc0_isr
/* for the lightsense example */
#define LESENSE_IRQHandler lesense_isr
#define PCNT0_IRQHandler pcnt0_isr
#endif