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made blinking a led on efm32 possible

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this includes all register definitions for the gpu and mcu modules, but
not all their bit definitions
This commit is contained in:
chrysn
2012-02-25 22:42:15 +01:00
parent 2180a02e2f
commit 08918902ab
3 changed files with 239 additions and 48 deletions
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69
examples/efm32/tinygecko/efm32-tg-stk3300/miniblink/miniblink.c
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@@ -18,55 +18,28 @@
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
//#include <libopencm3/efm32/tinygecko/gpio.h>
//
//void gpio_setup(void)
//{
// /* Enable GPIOC clock. */
// /* Manually: */
// // RCC_APB2ENR |= RCC_APB2ENR_IOPCEN;
// /* Using API functions: */
// rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPCEN);
//
// /* Set GPIO8 (in GPIO port C) to 'output push-pull'. */
// /* Manually: */
// // GPIOC_CRH = (GPIO_CNF_OUTPUT_PUSHPULL << (((8 - 8) * 4) + 2));
// // GPIOC_CRH |= (GPIO_MODE_OUTPUT_2_MHZ << ((8 - 8) * 4));
// /* Using API functions: */
// gpio_set_mode(GPIOC, GPIO_MODE_OUTPUT_2_MHZ,
// GPIO_CNF_OUTPUT_PUSHPULL, GPIO8);
//}
#include <libopencm3/efm32/tinygecko/gpio.h>
#include <libopencm3/efm32/tinygecko/cmu.h>
int main(void)
{
// int i;
//
// gpio_setup();
//
// /* Blink the LED (PC8) on the board. */
// while (1) {
// /* Manually: */
// // GPIOC_BSRR = GPIO8; /* LED off */
// // for (i = 0; i < 800000; i++) /* Wait a bit. */
// // __asm__("nop");
// // GPIOC_BRR = GPIO8; /* LED on */
// // for (i = 0; i < 800000; i++) /* Wait a bit. */
// // __asm__("nop");
//
// /* Using API functions gpio_set()/gpio_clear(): */
// // gpio_set(GPIOC, GPIO8); /* LED off */
// // for (i = 0; i < 800000; i++) /* Wait a bit. */
// // __asm__("nop");
// // gpio_clear(GPIOC, GPIO8); /* LED on */
// // for (i = 0; i < 800000; i++) /* Wait a bit. */
// // __asm__("nop");
//
// /* Using API function gpio_toggle(): */
// gpio_toggle(GPIOC, GPIO8); /* LED on/off */
// for (i = 0; i < 800000; i++) /* Wait a bit. */
// __asm__("nop");
// }
//
// return 0;
for(;;);
// FIXME: As of now, this doesn't work without x being volatile; an issue with linking?
volatile int x;
// Before GPIO works, according to d0034_efm32tg_reference_manual.pdf
// note in section 28.3.7, we'll have to enable GPIO in CMU_HFPERCLKEN0
CMU_HFPERCLKEN0 |= CMU_HFPERCLKEN0_GPIO;
// The User LED is connected to PD7 to the plus side of the LED
// according to t0011_efm32_tiny_gecko_stk_user_manual.pdf figures 16.2
// and 16.3 (called UIF_LED0)
GPIO_PD_MODEL = GPIO_MODE_PUSHPULL<<(7*4);
GPIO_PD_DOUTSET = 1<<7;
while(1) {
for(x = 0; x < 200000; ++x);
GPIO_PD_DOUTTGL = 1<<7;
};
}