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/*
* Copyright © 2012 Keith Packard <keithp@keithp.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
#include <ao.h>
#include <ao_profile.h>
static void ao_profile_test(void)
{
uint8_t i;
uint32_t ticks[20];
for (i = 0; i < 20; i++) {
ticks[i] = ao_profile_tick();
ao_delay(0);
}
for (i = 0; i < 19; i++)
printf ("%d\n", ticks[i+1] - ticks[i]);
}
static const struct ao_cmds ao_profile_cmds[] = {
{ ao_profile_test, "P\0Test profile counter" },
{ 0, NULL }
};
void ao_profile_init(void)
{
/* Turn on timer 2 and 4 */
stm_rcc.apb1enr |= (1 << STM_RCC_APB1ENR_TIM2EN) |
(1 << STM_RCC_APB1ENR_TIM4EN);
/* disable timers */
stm_tim4.cr1 = 0;
stm_tim2.cr1 = 0;
/* tim4 is master */
stm_tim4.cr2 = ((0 << STM_TIM234_CR2_TI1S) |
(STM_TIM234_CR2_MMS_UPDATE << STM_TIM234_CR2_MMS) |
(0 << STM_TIM234_CR2_CCDS));
stm_tim4.smcr = ((0 << STM_TIM234_SMCR_ETP) |
(0 << STM_TIM234_SMCR_ECE) |
(STM_TIM234_SMCR_ETPS_OFF << STM_TIM234_SMCR_ETPS) |
(STM_TIM234_SMCR_ETF_NONE << STM_TIM234_SMCR_ETF) |
(0 << STM_TIM234_SMCR_MSM) |
(STM_TIM234_SMCR_TS_ITR3 << STM_TIM234_SMCR_TS) |
(0 << STM_TIM234_SMCR_OCCS) |
(STM_TIM234_SMCR_SMS_DISABLE << STM_TIM234_SMCR_SMS));
stm_tim4.dier = 0;
stm_tim4.sr = 0;
stm_tim4.psc = 31;
stm_tim4.cnt = 0;
stm_tim4.arr = 0xffff;
/* tim2 is slaved to tim4 */
stm_tim2.cr2 = ((0 << STM_TIM234_CR2_TI1S) |
(STM_TIM234_CR2_MMS_ENABLE << STM_TIM234_CR2_MMS) |
(0 << STM_TIM234_CR2_CCDS));
stm_tim2.smcr = ((0 << STM_TIM234_SMCR_ETP) |
(0 << STM_TIM234_SMCR_ECE) |
(STM_TIM234_SMCR_ETPS_OFF << STM_TIM234_SMCR_ETPS) |
(STM_TIM234_SMCR_ETF_NONE << STM_TIM234_SMCR_ETF) |
(0 << STM_TIM234_SMCR_MSM) |
(STM_TIM234_SMCR_TS_ITR3 << STM_TIM234_SMCR_TS) |
(0 << STM_TIM234_SMCR_OCCS) |
(STM_TIM234_SMCR_SMS_EXTERNAL_CLOCK << STM_TIM234_SMCR_SMS));
stm_tim2.dier = 0;
stm_tim2.sr = 0;
stm_tim2.psc = 0;
stm_tim2.cnt = 0;
stm_tim2.arr = 0xffff;
/* Start your timers */
stm_tim2.cr1 = ((STM_TIM234_CR1_CKD_1 << STM_TIM234_CR1_CKD) |
(0 << STM_TIM234_CR1_ARPE) |
(STM_TIM234_CR1_CMS_EDGE | STM_TIM234_CR1_CMS) |
(STM_TIM234_CR1_DIR_UP << STM_TIM234_CR1_DIR) |
(0 << STM_TIM234_CR1_OPM) |
(0 << STM_TIM234_CR1_URS) |
(0 << STM_TIM234_CR1_UDIS) |
(1 << STM_TIM234_CR1_CEN));
stm_tim4.cr1 = ((STM_TIM234_CR1_CKD_1 << STM_TIM234_CR1_CKD) |
(0 << STM_TIM234_CR1_ARPE) |
(STM_TIM234_CR1_CMS_EDGE | STM_TIM234_CR1_CMS) |
(STM_TIM234_CR1_DIR_UP << STM_TIM234_CR1_DIR) |
(0 << STM_TIM234_CR1_OPM) |
(1 << STM_TIM234_CR1_URS) |
(0 << STM_TIM234_CR1_UDIS) |
(1 << STM_TIM234_CR1_CEN));
ao_cmd_register(&ao_profile_cmds[0]);
}
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