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mcpwm: fix the fault handling and capture issues

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1. The fault signal 3 for unit 2 is corrected to the right value

2. Now `mcpwm_fault_set_oneshot_mode` will clear the status before, no
need to reset the peripheral.

3. The capture feature relies on the prescaler, but it's only
initialized in the mcpwm_init funciton, which is used to initialize a
PWM channel. This means, the capture may not work correctly if no PWM
channel is enabled.

   Now the prescaler is also updated when `mcpwm_capture_enable` is
called.
This commit is contained in:
michael 2019-11-17 20:52:33 +08:00 committed by Michael (XIAO Xufeng)
parent 3c6f992cf0
commit 919dbdd170
1 changed files with 7 additions and 1 deletions
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8
components/driver/mcpwm.c
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@ -79,7 +79,7 @@ esp_err_t mcpwm_gpio_init(mcpwm_unit_t mcpwm_num, mcpwm_io_signals_t io_signal,
MCPWM_CHECK((GPIO_IS_VALID_OUTPUT_GPIO(gpio_num)), MCPWM_GPIO_ERROR, ESP_ERR_INVALID_ARG);
gpio_set_direction(gpio_num, GPIO_MODE_OUTPUT);
gpio_matrix_out(gpio_num, PWM1_OUT0A_IDX + io_signal, 0, 0);
} else if (io_signal >= MCPWM_SYNC_0 && io_signal < MCPWM_FAULT_2) {
} else if (io_signal >= MCPWM_SYNC_0 && io_signal <= MCPWM_FAULT_2) {
gpio_set_direction(gpio_num, GPIO_MODE_INPUT);
gpio_matrix_in(gpio_num, PWM1_SYNC0_IN_IDX + io_signal - OFFSET_FOR_GPIO_IDX_1, 0);
} else {
@ -625,6 +625,9 @@ esp_err_t mcpwm_fault_set_oneshot_mode(mcpwm_unit_t mcpwm_num, mcpwm_timer_t tim
MCPWM_CHECK(mcpwm_num < MCPWM_UNIT_MAX, MCPWM_UNIT_NUM_ERROR, ESP_ERR_INVALID_ARG);
MCPWM_CHECK(timer_num < MCPWM_TIMER_MAX, MCPWM_TIMER_ERROR, ESP_ERR_INVALID_ARG);
portENTER_CRITICAL(&mcpwm_spinlock);
//clear the ost triggered status
MCPWM[mcpwm_num]->channel[timer_num].tz_cfg1.clr_ost = 1;
MCPWM[mcpwm_num]->channel[timer_num].tz_cfg1.clr_ost = 0;
if (fault_sig == MCPWM_SELECT_F0) {
MCPWM[mcpwm_num]->channel[timer_num].tz_cfg0.f0_ost = 1;
MCPWM[mcpwm_num]->channel[timer_num].tz_cfg0.f0_cbc = 0;
@ -656,6 +659,9 @@ esp_err_t mcpwm_capture_enable(mcpwm_unit_t mcpwm_num, mcpwm_capture_signal_t ca
{
MCPWM_CHECK(mcpwm_num < MCPWM_UNIT_MAX, MCPWM_UNIT_NUM_ERROR, ESP_ERR_INVALID_ARG);
portENTER_CRITICAL(&mcpwm_spinlock);
//We have to do this here, since there is no standalone init function
//without enabling any PWM channels.
MCPWM[mcpwm_num]->clk_cfg.prescale = MCPWM_CLK_PRESCL;
MCPWM[mcpwm_num]->cap_timer_cfg.timer_en = 1;
MCPWM[mcpwm_num]->cap_cfg_ch[cap_sig].en = 1;
MCPWM[mcpwm_num]->cap_cfg_ch[cap_sig].mode = (1 << cap_edge);