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Add start of TC and design for init image

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Sem van der Hoeven
2023-10-31 22:10:55 +01:00
parent 34fd5a5380
commit cf27e84969
5 changed files with 31 additions and 63 deletions
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22
due_obd2/obd2_timer.c
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@@ -1,10 +1,6 @@
#include "sam3xa/include/sam3x8e.h"
#include "sam3xa/include/component/component_rtt.h"
// #include "sam3xa/include/component/component_rtt.h"
// #include "sam3xa/include/sam3x8e.h"
#include "obd2_timer.h"
void obd2_timer_init(void)
void obd2_RTT_init(void)
{
/* enable the timer: reset the RTT
RTT->RTT_MR = RTT_MR_RTTRST;
@@ -12,16 +8,16 @@ void obd2_timer_init(void)
RTT->RTT_AR = 0;
}
void obd2_timer_enable()
void obd2_RTT_enable()
{
/* enable the alarm interrupt*/
RTT->RTT_MR |= RTT_MR_ALMIEN;
/* enable the alarm interrupt and set the prescaler to the processor frequency to generate an interrupt every second*/
RTT->RTT_MR |= RTT_MR_ALMIEN | RTT_MR_RTPRES(CLOCK_FREQ);
/* enable the interrupt*/
NVIC_EnableIRQ(RTT_IRQn);
}
void obd2_timer_reset()
void obd2_RTT_reset()
{
/* To prevent several executions of the interrupt handler,
the interrupt must be disabled in the interrupt handler
@@ -41,8 +37,14 @@ void obd2_timer_reset()
RTT->RTT_MR |= RTT_MR_RTTRST;
}
void obd2_timer_set_period(__UINT32_TYPE__ period)
void obd2_RTT_set_period(__UINT32_TYPE__ period)
{
/* set the prescaler value equal to the clock speed divided by how many milliseconds*/
RTT->RTT_MR |= RTT_MR_RTPRES(CLOCK_FREQ / (1000/period));
}
void obd2_TC_init()
{
/* enable the timer/counter 0*/
TC0->TC_CHANNEL[0].TC_CCR |= TC_CCR_CLKEN;
}