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samd: button code updated for libopencm3

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This commit is contained in:
Ryan 2018-10-04 14:24:18 -07:00
parent b91a975d56
commit 92ed79e68e
1 changed files with 17 additions and 34 deletions
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51
src/platforms/jeff/platform.c
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@ -33,6 +33,9 @@
#include <libopencm3/cm3/systick.h>
#include <libopencm3/cm3/scb.h>
#include <libopencm3/sam/d/tc.h>
#include <libopencm3/sam/d/eic.h>
static struct gclk_hw clock = {
.gclk0 = SRC_DFLL48M,
.gclk1 = SRC_OSC8M,
@ -52,7 +55,6 @@ uint8_t running_status;
static volatile uint32_t time_ms;
uint8_t button_pressed;
//static volatile uint32_t button_counter;
void sys_tick_handler(void)
{
@ -106,12 +108,6 @@ static void adc_init(void)
adc_enable(ADC_REFCTRL_VREFA,0,ADC_INPUTCTRL_GND,ADC_MUXPOS);
}
#define EIC 0x40001800
#define EIC_CONFIG1 0x4000181C
#define EIC_INTENSET 0x4000180C
#define TC3 0x42002C00
static void counter_init(void)
{
/* enable bus and clock */
@ -121,49 +117,38 @@ static void counter_init(void)
periph_clk_en(GCLK_ID_TC3, 1);
/* reset */
*((uint16_t*)TC3) = 1;
tc_reset(3);
/* set CTRLA.MODE (default 16-bit) */
/* set CTRLA.WAVEGEN */
/* set CTRLA.PRESCALER and CTRLA.PRESYNC */
*((uint16_t*)TC3) = (7<<8); //| (1<<12);
tc_config_ctrla(3,1,(7<<8));
/* set CC0 (approx. 5 seconds delay) */
*((uint16_t*)(0x42002C18)) = 1000;
tc_set_cc(3,0,1000);
/* enable MC0 interrupt */
*((uint8_t*)(0x42002C0D)) = (1<<4);
tc_enable_interrupt(3,(1<<4));
nvic_enable_irq(NVIC_TC3_IRQ);
/* set CTRLBSET.ONESHOT */
/* enable the TC */
}
static void button_init(void)
{
#if 1
gpio_config_special(BUTTON_PORT, BUTTON_PIN, SOC_GPIO_PERIPH_A);
/* enable bus and clock */
INSERTBF(PM_APBAMASK_EIC, 1, PM->apbamask);
set_periph_clk(GCLK0, GCLK_ID_EIC);
periph_clk_en(GCLK_ID_EIC, 1);
/* configure r/f edge, enable filtering */
//EIC->evctrl = (1<<15);
*((uint32_t*)EIC_CONFIG1) = ((2+8)<<28);
eic_set_config(15, 1, EIC_FALL);
/* enable the IEC */
*((uint8_t*)EIC) = (1<<1);
eic_enable(1);
/* enable interrupts */
*((uint32_t*)EIC_INTENSET) = (1<<15);
eic_enable_interrupt((1<<15));
nvic_enable_irq(NVIC_EIC_IRQ);
//button_counter = 0;
#else
gpio_config_input(BUTTON_PORT, BUTTON_PIN, 0);
#endif
}
void platform_init(void)
@ -273,30 +258,28 @@ void eic_isr(void)
{
if (!button_pressed){
/* set to rising-edge detection */
*((uint32_t*)EIC_CONFIG1) = ((1+8)<<28);
eic_set_config(15, 1, EIC_RISE);
/* enable counter */
*((uint16_t*)TC3) |= 2;
//*((uint8_t*)(0x42002C05)) = (1<<6);
tc_enable(3,1);
button_pressed = 1;
} else {
/* set to falling-edge detection */
*((uint32_t*)EIC_CONFIG1) = ((2+8)<<28);
eic_set_config(15, 1, EIC_FALL);
/* disable and reset counter */
*((uint16_t*)TC3) &= ~2;
*((uint16_t*)(0x42002C10)) = 0;
tc_enable(3,0);
button_pressed = 0;
}
/* clear the interrupt */
*((uint32_t*)0x40001810) = (1<<15);
eic_clr_interrupt((1<<15));
}
void tc3_isr(void)
{
if ((*((uint8_t*)(0x42002C0E)) & 16))
if (tc_interrupt_flag(3) & 16)
scb_reset_system();
}