6e984a8b5e
Microsecond (us) delays are now handled by a busy wait loop according to MCU frequency. This replaces the system counter method which had an overhead of around 12us. TC5 device and supporting routines removed as it was the old us delay counter. wait_ms is now properly a macro to CLK_delay_ms. wait_us is now properly a macro to CLK_delay_us. Removed CLK_get_us as it has no use. All calls to CLK_get_ms() have been replaced by timer_read64() with corrected typing. All calls to CLK_delay_ms() have been replaced by wait_ms(). All calls to CLK_delay_us() have been replaced by wait_us() and timings verified or updated as needed after review on scope. Corrected typing of variables using 64bit ms timer readings if needed.
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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