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driver: Avoid possible accidental mismatch between ledc_clk_src_t & ledc_clk_cfg_t enum

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ledc_types.h includes two similar enums, ledc_clk_src_t & ledc_clk_cfg_t. Latter was added in
ESP-IDF v4.0.

The two enums do different things but there are two similar names: LEDC_REF_TICK / LEDC_USE_REF_TICK
and LEDC_APB_CLK / LEDC_USE_APB_CLK.

Because C will accept any enum or integer value for an enum argument, there's no easy way to check
the correct enum is passed without using static analysis.

To avoid accidental errors, make the numeric values for the two similarly named enums the same.,

Noticed when looking into https://github.com/espressif/esp-idf/issues/4476
This commit is contained in:
Angus Gratton
2019-12-16 17:38:00 +11:00
committed by Angus Gratton
parent f7b51c164d
commit 435dd546cc
2 changed files with 15 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
components/soc/esp32/include/hal/ledc_ll.h
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@@ -138,7 +138,7 @@ static inline void ledc_ll_get_clock_divider(ledc_dev_t *hw, ledc_mode_t speed_m
* @return None
*/
static inline void ledc_ll_set_clock_source(ledc_dev_t *hw, ledc_mode_t speed_mode, ledc_timer_t timer_sel, ledc_clk_src_t clk_src){
hw->timer_group[speed_mode].timer[timer_sel].conf.tick_sel = clk_src;
hw->timer_group[speed_mode].timer[timer_sel].conf.tick_sel = (clk_src == LEDC_APB_CLK);
}
/**
@@ -152,7 +152,11 @@ static inline void ledc_ll_set_clock_source(ledc_dev_t *hw, ledc_mode_t speed_mo
* @return None
*/
static inline void ledc_ll_get_clock_source(ledc_dev_t *hw, ledc_mode_t speed_mode, ledc_timer_t timer_sel, ledc_clk_src_t *clk_src){
*clk_src = hw->timer_group[speed_mode].timer[timer_sel].conf.tick_sel;
if (hw->timer_group[speed_mode].timer[timer_sel].conf.tick_sel) {
*clk_src = LEDC_APB_CLK;
} else {
*clk_src = LEDC_REF_TICK;
}
}
/**