89 lines
2.5 KiB
C
89 lines
2.5 KiB
C
/*
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Copyright 2018 Massdrop Inc.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef _CLKS_H_
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#define _CLKS_H_
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#ifndef MD_BOOTLOADER
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// From keyboard
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# include "config_led.h"
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# include "config.h"
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#endif // MD_BOOTLOADER
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#define PLL_RATIO 47 // mcu frequency ((X+1)MHz)
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#define FREQ_DFLL_DEFAULT 48000000 // DFLL frequency / usb clock
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#define FREQ_SPI_DEFAULT 1000000 // spi to 595 shift regs
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#define FREQ_I2C0_DEFAULT 100000 // i2c to hub
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#define FREQ_I2C1_DEFAULT I2C_HZ // i2c to LED drivers
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#define FREQ_TC45_DEFAULT 1000000 // 1 usec resolution
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// I2C1 Set ~Result PWM Time (2x Drivers)
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// 1000000 1090000
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// 900000 1000000 3.82ms
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// 800000 860000
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// 700000 750000
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// 600000 630000
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// 580000 615000 6.08ms
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// 500000 522000
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#define FREQ_XOSC0 16000000
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#define CHAN_SERCOM_SPI 2 // shift regs
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#define CHAN_SERCOM_I2C0 0 // hub
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#define CHAN_SERCOM_I2C1 1 // led drivers
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#define CHAN_SERCOM_UART 3 // debug util
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// Generator clock channels
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#define GEN_DPLL0 0
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#define GEN_OSC0 1
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#define GEN_TC45 2
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#define SERCOM_COUNT 5
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#define GCLK_COUNT 12
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typedef struct clk_s {
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uint32_t freq_dfll;
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uint32_t freq_dpll[2];
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uint32_t freq_sercom[SERCOM_COUNT];
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uint32_t freq_gclk[GCLK_COUNT];
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uint32_t freq_xosc0;
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uint32_t freq_spi;
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uint32_t freq_i2c0;
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uint32_t freq_i2c1;
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uint32_t freq_uart;
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uint32_t freq_adc0;
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} clk_t;
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extern volatile clk_t system_clks;
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extern volatile uint64_t ms_clk;
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void CLK_oscctrl_init(void);
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void CLK_reset_time(void);
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uint32_t CLK_set_gclk_freq(uint8_t gclkn, uint32_t freq);
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uint32_t CLK_enable_timebase(void);
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uint64_t timer_read64(void);
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void CLK_delay_us(uint32_t usec);
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void CLK_delay_ms(uint64_t msec);
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uint32_t CLK_set_spi_freq(uint8_t sercomn, uint32_t freq);
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uint32_t CLK_set_i2c0_freq(uint8_t sercomn, uint32_t freq);
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uint32_t CLK_set_i2c1_freq(uint8_t sercomn, uint32_t freq);
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void CLK_init(void);
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#endif // _CLKS_H_
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