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cc2538: pwm: Fix clock

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The peripheral core clock of the general-purpose timers used by the PWM
driver is the system clock, not the I/O clock.

Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau.dev@gmail.com>
This commit is contained in:
Benoît Thébaudeau 2015-12-13 00:23:40 +01:00
parent 4302e23ddc
commit 9c6d9a7fe0
2 changed files with 12 additions and 12 deletions
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4
cpu/cc2538/dev/pwm.c
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@ -135,10 +135,10 @@ pwm_enable(uint32_t freq, uint8_t duty, uint8_t timer, uint8_t ab)
}
/* Get the peripheral clock and equivalent deassert count */
interval_load = sys_ctrl_get_io_clock() / freq;
interval_load = sys_ctrl_get_sys_clock() / freq;
duty_count = ((interval_load * duty) + 1) / 100;
PRINTF("PWM: IO %luHz: %lu %lu\n", sys_ctrl_get_io_clock(),
PRINTF("PWM: sys %luHz: %lu %lu\n", sys_ctrl_get_sys_clock(),
interval_load, duty_count);
/* Set the start value (period), count down */