circuitpython/ports/renesas-ra/ra/ra_timer.c

156 lines
4.4 KiB
C

/*
* The MIT License (MIT)
*
* Copyright (c) 2021 Renesas Electronics Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include <stdio.h>
#include <stdint.h>
#include <stdbool.h>
#include "hal_data.h"
#include "ra_config.h"
#include "ra_int.h"
#include "ra_utils.h"
#include "ra_timer.h"
#define AGT_CH_SIZE 2
enum AGT_SOURCE {
AGT_PCLKB = 0,
AGT_PCLKB8,
AGT_PCLKB2 = 3,
AGT_AGTKCLK,
AGT_AGT0UNDER,
AGT_AGTSCLK
};
static R_AGT0_Type *agt_regs[AGT_CH_SIZE] = {
(R_AGT0_Type *)0x40084000,
(R_AGT0_Type *)0x40084100
};
static uint8_t ch_to_irq[AGT_CH_SIZE] = {
#if defined(VECTOR_NUMBER_AGT0_INT)
VECTOR_NUMBER_AGT0_INT,
#else
0,
#endif
#if defined(VECTOR_NUMBER_AGT1_INT)
VECTOR_NUMBER_AGT1_INT,
#else
0,
#endif
};
static float ra_agt_freq[AGT_CH_SIZE];
static volatile uint32_t ra_agt_counter[AGT_CH_SIZE];
static AGT_TIMER_CB ra_agt_timer_cb[AGT_CH_SIZE];
static void *ra_agt_timer_param[AGT_CH_SIZE];
void ra_agt_timer_set_callback(uint32_t ch, AGT_TIMER_CB cb, void *param) {
ra_agt_timer_cb[ch] = cb;
ra_agt_timer_param[ch] = param;
}
static void ra_agt_timer_chk_callback(uint32_t ch) {
ra_agt_counter[ch] += 1;
if (ra_agt_timer_cb[ch]) {
(*ra_agt_timer_cb[ch])(ra_agt_timer_param[ch]);
}
}
void ra_agt_timer_start(uint32_t ch) {
agt_regs[ch]->AGTCR_b.TSTART = 1; /* start counter */
}
void ra_agt_timer_stop(uint32_t ch) {
agt_regs[ch]->AGTCR_b.TSTART = 0; /* stop counter */
}
void ra_agt_timer_set_freq(uint32_t ch, float freq) {
R_AGT0_Type *agt_reg = agt_regs[ch];
uint8_t source = 0;
uint16_t period = 0;
uint8_t cks = 0;
ra_agt_counter[ch] = 0;
if (freq > (float)(PCLK / 2)) {
return;
} else if (freq > 1000.0) {
source = AGT_PCLKB2;
period = (uint16_t)((float)(PCLK / 2) / freq);
} else if (freq > 1.0) {
source = AGT_AGTSCLK;
cks = 2;
period = (uint16_t)((float)(32768 / 4) / freq);
} else if (freq > 0.01) {
source = AGT_AGTSCLK;
period = (uint16_t)((float)(32768 / 128) / freq);
cks = 7;
} else {
return;
}
ra_agt_freq[ch] = freq;
agt_reg->AGTCR_b.TSTART = 0; // stop counter
agt_reg->AGTMR2 = cks;
agt_reg->AGTMR1 = (uint8_t)(source << 4); // mode is timer mode
agt_reg->AGT = (uint16_t)period;
}
float ra_agt_timer_get_freq(uint32_t ch) {
return ra_agt_freq[ch];
}
void ra_agt_timer_init(uint32_t ch, float freq) {
R_AGT0_Type *agt_reg = agt_regs[ch];
if (ch == 0) {
ra_mstpcrd_start(R_MSTP_MSTPCRD_MSTPD3_Msk);
} else {
ra_mstpcrd_start(R_MSTP_MSTPCRD_MSTPD2_Msk);
}
ra_agt_timer_set_freq(ch, freq);
agt_reg->AGTCR_b.TUNDF = 1; // underflow interrupt
R_BSP_IrqCfgEnable((IRQn_Type const)ch_to_irq[ch], RA_PRI_TIM5, (void *)NULL);
}
void ra_agt_timer_deinit(uint32_t ch) {
NVIC_DisableIRQ((IRQn_Type const)ch_to_irq[ch]);
ra_agt_timer_stop(ch);
ra_agt_timer_cb[ch] = (AGT_TIMER_CB)0;
ra_agt_timer_param[ch] = (void *)0;
if (ch == 0) {
ra_mstpcrd_stop(R_MSTP_MSTPCRD_MSTPD3_Msk);
} else {
ra_mstpcrd_stop(R_MSTP_MSTPCRD_MSTPD2_Msk);
}
}
__WEAK void agt_int_isr(void) {
IRQn_Type irq = R_FSP_CurrentIrqGet();
uint32_t ch = irq_to_ch[(uint32_t)irq];
R_BSP_IrqStatusClear(irq);
ra_agt_timer_chk_callback(ch);
}
extern uint32_t uwTick;
uint32_t mtick() {
return uwTick;
}