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Merge branch 'feature/ledc_low_speed_channels' into 'master'

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add ledc low speed channels

1. add low speed channels
2. modify example code.

See merge request !490
This commit is contained in:
Ivan Grokhotkov
2017-03-21 15:35:40 +08:00
parent 91d35f01f2 7670e93639
commit 9254d2846f
5 changed files with 274 additions and 196 deletions
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1
examples/peripherals/ledc/README.md
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@@ -14,3 +14,4 @@
* This example use GPIO18/19/4/5 as LEDC ouput, and it will change the duty repeatedly.
* GPIO18/19 are from high speed channel group. GPIO4/5 are from low speed channel group.

179
examples/peripherals/ledc/main/ledc_fade.c
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@@ -27,105 +27,124 @@
*
* 4. This example use GPIO18/19/4/5 as LEDC ouput, and it will change the duty repeatedly.
*
* 5. GPIO18/19 are from high speed channel group. GPIO4/5 are from low speed channel group.
*
*/
#define LEDC_HS_TIMER LEDC_TIMER_0
#define LEDC_HS_MODE LEDC_HIGH_SPEED_MODE
#define LEDC_HS_CH0_GPIO (18)
#define LEDC_HS_CH0_CHANNEL LEDC_CHANNEL_0
#define LEDC_HS_CH1_GPIO (19)
#define LEDC_HS_CH1_CHANNEL LEDC_CHANNEL_1
#define LEDC_IO_0 (18)
#define LEDC_IO_1 (19)
#define LEDC_IO_2 (4)
#define LEDC_IO_3 (5)
#define LEDC_LS_TIMER LEDC_TIMER_1
#define LEDC_LS_MODE LEDC_LOW_SPEED_MODE
#define LEDC_LS_CH2_GPIO (4)
#define LEDC_LS_CH2_CHANNEL LEDC_CHANNEL_2
#define LEDC_LS_CH3_GPIO (5)
#define LEDC_LS_CH3_CHANNEL LEDC_CHANNEL_3
esp_err_t app_main()
{
ledc_timer_config_t ledc_timer = {
//set timer counter bit number
.bit_num = LEDC_TIMER_13_BIT,
//set frequency of pwm
.freq_hz = 5000,
//timer mode,
.speed_mode = LEDC_HIGH_SPEED_MODE,
//timer index
.timer_num = LEDC_TIMER_0
#define LEDC_TEST_CH_NUM (4)
typedef struct {
int channel;
int io;
int mode;
int timer_idx;
} ledc_info_t;
void app_main()
{
int ch;
ledc_info_t ledc_ch[LEDC_TEST_CH_NUM] = {
{
.channel = LEDC_HS_CH0_CHANNEL,
.io = LEDC_HS_CH0_GPIO,
.mode = LEDC_HS_MODE,
.timer_idx = LEDC_HS_TIMER
},
{
.channel = LEDC_HS_CH1_CHANNEL,
.io = LEDC_HS_CH1_GPIO,
.mode = LEDC_HS_MODE,
.timer_idx = LEDC_HS_TIMER
},
{
.channel = LEDC_LS_CH2_CHANNEL,
.io = LEDC_LS_CH2_GPIO,
.mode = LEDC_LS_MODE,
.timer_idx = LEDC_LS_TIMER
},
{
.channel = LEDC_LS_CH3_CHANNEL,
.io = LEDC_LS_CH3_GPIO,
.mode = LEDC_LS_MODE,
.timer_idx = LEDC_LS_TIMER
}
};
ledc_timer_config_t ledc_timer = {
.bit_num = LEDC_TIMER_13_BIT, //set timer counter bit number
.freq_hz = 5000, //set frequency of pwm
.speed_mode = LEDC_HS_MODE, //timer mode,
.timer_num = LEDC_HS_TIMER //timer index
};
//configure timer0 for high speed channels
ledc_timer_config(&ledc_timer);
ledc_channel_config_t ledc_channel = {
//set LEDC channel 0
.channel = LEDC_CHANNEL_0,
//set the duty for initialization.(duty range is 0 ~ ((2**bit_num)-1)
.duty = 100,
//GPIO number
.gpio_num = LEDC_IO_0,
//GPIO INTR TYPE, as an example, we enable fade_end interrupt here.
.intr_type = LEDC_INTR_FADE_END,
//set LEDC mode, from ledc_mode_t
.speed_mode = LEDC_HIGH_SPEED_MODE,
//set LEDC timer source, if different channel use one timer,
//the frequency and bit_num of these channels should be the same
.timer_sel = LEDC_TIMER_0
};
//set the configuration
ledc_channel_config(&ledc_channel);
//configure timer1 for low speed channels
ledc_timer.speed_mode = LEDC_LS_MODE;
ledc_timer.timer_num = LEDC_LS_TIMER;
ledc_timer_config(&ledc_timer);
//config ledc channel1
ledc_channel.channel = LEDC_CHANNEL_1;
ledc_channel.gpio_num = LEDC_IO_1;
ledc_channel_config(&ledc_channel);
//config ledc channel2
ledc_channel.channel = LEDC_CHANNEL_2;
ledc_channel.gpio_num = LEDC_IO_2;
ledc_channel_config(&ledc_channel);
//config ledc channel3
ledc_channel.channel = LEDC_CHANNEL_3;
ledc_channel.gpio_num = LEDC_IO_3;
ledc_channel_config(&ledc_channel);
for (ch = 0; ch < LEDC_TEST_CH_NUM; ch++) {
ledc_channel_config_t ledc_channel = {
//set LEDC channel 0
.channel = ledc_ch[ch].channel,
//set the duty for initialization.(duty range is 0 ~ ((2**bit_num)-1)
.duty = 0,
//GPIO number
.gpio_num = ledc_ch[ch].io,
//GPIO INTR TYPE, as an example, we enable fade_end interrupt here.
.intr_type = LEDC_INTR_FADE_END,
//set LEDC mode, from ledc_mode_t
.speed_mode = ledc_ch[ch].mode,
//set LEDC timer source, if different channel use one timer,
//the frequency and bit_num of these channels should be the same
.timer_sel = ledc_ch[ch].timer_idx,
};
//set the configuration
ledc_channel_config(&ledc_channel);
}
//initialize fade service.
ledc_fade_func_install(0);
while(1) {
while (1) {
printf("LEDC fade up\n");
ledc_set_fade_with_time(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_0, 1000, 2000);
ledc_set_fade_with_time(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_1, 7000, 2000);
ledc_set_fade_with_time(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_2, 5000, 2000);
ledc_set_fade_with_time(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_3, 3000, 2000);
ledc_fade_start(LEDC_CHANNEL_0, LEDC_FADE_NO_WAIT);
ledc_fade_start(LEDC_CHANNEL_1, LEDC_FADE_NO_WAIT);
ledc_fade_start(LEDC_CHANNEL_2, LEDC_FADE_NO_WAIT);
ledc_fade_start(LEDC_CHANNEL_3, LEDC_FADE_NO_WAIT);
for (ch = 0; ch < LEDC_TEST_CH_NUM; ch++) {
ledc_set_fade_with_time(ledc_ch[ch].mode, ledc_ch[ch].channel, 4000, 2000);
ledc_fade_start(ledc_ch[ch].mode, ledc_ch[ch].channel, LEDC_FADE_NO_WAIT);
}
vTaskDelay(3000 / portTICK_PERIOD_MS);
printf("LEDC fade down\n");
ledc_set_fade_with_time(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_0, 100, 2000);
ledc_set_fade_with_time(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_1, 300, 2000);
ledc_set_fade_with_time(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_2, 500, 2000);
ledc_set_fade_with_time(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_3, 700, 2000);
ledc_fade_start(LEDC_CHANNEL_0, LEDC_FADE_NO_WAIT);
ledc_fade_start(LEDC_CHANNEL_1, LEDC_FADE_NO_WAIT);
ledc_fade_start(LEDC_CHANNEL_2, LEDC_FADE_NO_WAIT);
ledc_fade_start(LEDC_CHANNEL_3, LEDC_FADE_NO_WAIT);
for (ch = 0; ch < LEDC_TEST_CH_NUM; ch++) {
ledc_set_fade_with_time(ledc_ch[ch].mode, ledc_ch[ch].channel, 0, 2000);
ledc_fade_start(ledc_ch[ch].mode, ledc_ch[ch].channel, LEDC_FADE_NO_WAIT);
}
vTaskDelay(3000 / portTICK_PERIOD_MS);
printf("LEDC set duty without fade\n");
ledc_set_duty(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_0, 1000);
ledc_set_duty(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_1, 7000);
ledc_set_duty(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_2, 5000);
ledc_set_duty(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_3, 3000);
ledc_update_duty(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_0);
ledc_update_duty(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_1);
ledc_update_duty(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_2);
ledc_update_duty(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_3);
vTaskDelay(2000 / portTICK_PERIOD_MS);
for (ch = 0; ch < LEDC_TEST_CH_NUM; ch++) {
ledc_set_duty(ledc_ch[ch].mode, ledc_ch[ch].channel, 2000);
ledc_update_duty(ledc_ch[ch].mode, ledc_ch[ch].channel);
}
vTaskDelay(1000 / portTICK_PERIOD_MS);
printf("LEDC set duty without fade\n");
ledc_set_duty(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_0, 0);
ledc_set_duty(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_1, 0);
ledc_set_duty(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_2, 0);
ledc_set_duty(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_3, 0);
ledc_update_duty(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_0);
ledc_update_duty(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_1);
ledc_update_duty(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_2);
ledc_update_duty(LEDC_HIGH_SPEED_MODE, LEDC_CHANNEL_3);
vTaskDelay(2000 / portTICK_PERIOD_MS);
for (ch = 0; ch < LEDC_TEST_CH_NUM; ch++) {
ledc_set_duty(ledc_ch[ch].mode, ledc_ch[ch].channel, 0);
ledc_update_duty(ledc_ch[ch].mode, ledc_ch[ch].channel);
}
vTaskDelay(1000 / portTICK_PERIOD_MS);
}
}