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- // Module for working with the ledc driver
- #include "module.h"
- #include "lauxlib.h"
- #include "platform.h"
- #include "driver/ledc.h"
- typedef struct {
- int timer;
- int channel;
- int mode;
- } ledc_channel;
- static int lledc_new_channel( lua_State *L )
- {
- int t=1;
- luaL_checkanytable (L, t);
- /* Setup timer */
- ledc_timer_config_t ledc_timer;
- lua_getfield(L, t, "bits");
- ledc_timer.bit_num = luaL_optint (L, -1, LEDC_TIMER_13_BIT);
- if(ledc_timer.bit_num < LEDC_TIMER_10_BIT || ledc_timer.bit_num > LEDC_TIMER_15_BIT)
- return luaL_error (L, "bits field out of range");
- lua_getfield(L, t, "frequency");
- if (lua_type (L, -1) == LUA_TNUMBER) {
- ledc_timer.freq_hz = luaL_checkinteger(L, -1);
- } else {
- return luaL_error(L, "missing or invalid 'frequency' field");
- }
- lua_getfield(L, t, "mode");
- if (lua_type (L, -1) == LUA_TNUMBER) {
- ledc_timer.speed_mode = luaL_checkinteger(L, -1);
- if(ledc_timer.speed_mode != LEDC_HIGH_SPEED_MODE && ledc_timer.speed_mode != LEDC_LOW_SPEED_MODE)
- return luaL_error (L, "Invalid mode");
- } else {
- return luaL_error(L, "missing or invalid 'mode' field");
- }
- lua_getfield(L, t, "timer");
- if (lua_type (L, -1) == LUA_TNUMBER) {
- ledc_timer.timer_num = luaL_checkinteger(L, -1);
- if(ledc_timer.timer_num < LEDC_TIMER_0 || ledc_timer.timer_num > LEDC_TIMER_3)
- return luaL_error (L, "Invalid timer");
- } else {
- return luaL_error(L, "missing or invalid 'timer' field");
- }
- /* Setup channel */
- ledc_channel_config_t channel_config = {
- .speed_mode = ledc_timer.speed_mode,
- .timer_sel = ledc_timer.timer_num,
- .intr_type = LEDC_INTR_DISABLE
- };
- lua_getfield(L, t, "channel");
- if (lua_type (L, -1) == LUA_TNUMBER) {
- channel_config.channel = luaL_checkinteger(L, -1);
- if(channel_config.channel < LEDC_CHANNEL_0 || channel_config.channel > LEDC_CHANNEL_7)
- return luaL_error (L, "Invalid channel");
- } else {
- return luaL_error(L, "missing or invalid 'channel' field");
- }
- lua_getfield(L, t, "duty");
- if (lua_type (L, -1) == LUA_TNUMBER) {
- channel_config.duty = luaL_checkinteger(L, -1);
- } else {
- return luaL_error(L, "missing or invalid 'duty' field");
- }
- lua_getfield(L, t, "gpio");
- if (lua_type (L, -1) == LUA_TNUMBER) {
- channel_config.gpio_num = luaL_checkinteger(L, -1);
- if(!GPIO_IS_VALID_GPIO(channel_config.gpio_num))
- return luaL_error (L, "Invalid gpio");
- } else {
- return luaL_error(L, "missing or invalid 'gpio' field");
- }
- esp_err_t timerErr = ledc_timer_config(&ledc_timer);
- if(timerErr != ESP_OK)
- return luaL_error (L, "timer configuration failed code %d", timerErr);
- esp_err_t channelErr = ledc_channel_config(&channel_config);
- if(channelErr != ESP_OK)
- return luaL_error (L, "channel configuration failed code %d", channelErr);
- ledc_channel * channel = (ledc_channel*)lua_newuserdata(L, sizeof(ledc_channel));
- luaL_getmetatable(L, "ledc.channel");
- lua_setmetatable(L, -2);
- channel->mode = ledc_timer.speed_mode;
- channel->channel = channel_config.channel;
- channel->timer = ledc_timer.timer_num;
- return 1;
- }
- static int lledc_stop( lua_State *L ) {
- ledc_channel * channel = (ledc_channel*)luaL_checkudata(L, 1, "ledc.channel");
- int idleLevel = luaL_checkint (L, 2);
- luaL_argcheck(L, idleLevel >= 0 && idleLevel <= 1, 1, "Invalid idle level");
- esp_err_t err = ledc_stop(channel->mode, channel->channel, idleLevel);
- if(err != ESP_OK)
- return luaL_error (L, "stop failed, code %d", err);
- return 1;
- }
- static int lledc_set_freq( lua_State *L ) {
- ledc_channel * channel = (ledc_channel*)luaL_checkudata(L, 1, "ledc.channel");
- int frequency = luaL_checkint (L, 2);
- esp_err_t err = ledc_set_freq(channel->mode, channel->timer, frequency);
- if(err != ESP_OK)
- return luaL_error (L, "set freq failed, code %d", err);
- return 1;
- }
- static int lledc_get_freq( lua_State *L ) {
- ledc_channel * channel = (ledc_channel*)luaL_checkudata(L, 1, "ledc.channel");
- int frequency = ledc_get_freq(channel->mode, channel->timer);
- lua_pushinteger (L, frequency);
- return 1;
- }
- static int lledc_set_duty( lua_State *L ) {
- ledc_channel * channel = (ledc_channel*)luaL_checkudata(L, 1, "ledc.channel");
- int duty = luaL_checkint (L, 2);
- esp_err_t dutyErr = ledc_set_duty(channel->mode, channel->channel, duty);
- if(dutyErr != ESP_OK)
- return luaL_error (L, "set duty failed, code %d", dutyErr);
- esp_err_t updateErr = ledc_update_duty(channel->mode, channel->channel);
- if(updateErr != ESP_OK)
- return luaL_error (L, "update duty failed, code %d", updateErr);
- return 1;
- }
- static int lledc_get_duty( lua_State *L ) {
- ledc_channel * channel = (ledc_channel*)luaL_checkudata(L, 1, "ledc.channel");
- int duty = ledc_get_duty(channel->mode, channel->channel);
- lua_pushinteger (L, duty);
- return 1;
- }
- static int lledc_timer_rst( lua_State *L ) {
- ledc_channel * channel = (ledc_channel*)luaL_checkudata(L, 1, "ledc.channel");
- esp_err_t err = ledc_timer_rst(channel->mode, channel->timer);
- if(err != ESP_OK)
- return luaL_error (L, "reset failed, code %d", err);
- return 1;
- }
- static int lledc_timer_pause( lua_State *L ) {
- ledc_channel * channel = (ledc_channel*)luaL_checkudata(L, 1, "ledc.channel");
- esp_err_t err = ledc_timer_pause(channel->mode, channel->timer);
- if(err != ESP_OK)
- return luaL_error (L, "pause failed, code %d", err);
- return 1;
- }
- static int lledc_timer_resume( lua_State *L ) {
- ledc_channel * channel = (ledc_channel*)luaL_checkudata(L, 1, "ledc.channel");
- esp_err_t err = ledc_timer_resume(channel->mode, channel->timer);
- if(err != ESP_OK)
- return luaL_error (L, "resume failed, code %d", err);
- return 1;
- }
- static int lledc_set_fade_with_time( lua_State *L ) {
- ledc_channel * channel = (ledc_channel*)luaL_checkudata(L, 1, "ledc.channel");
- int stack = 1;
- int targetDuty = luaL_checkint (L, ++stack);
- int maxFadeTime = luaL_checkint (L, ++stack);
- int wait = luaL_optint (L, ++stack, LEDC_FADE_NO_WAIT);
- luaL_argcheck(L, wait == LEDC_FADE_NO_WAIT || wait == LEDC_FADE_WAIT_DONE, stack, "Invalid wait");
- ledc_fade_func_install(0);
- esp_err_t fadeErr = ledc_set_fade_with_time(channel->mode, channel->channel, targetDuty, maxFadeTime);
- if(fadeErr != ESP_OK)
- return luaL_error (L, "set fade failed, code %d", fadeErr);
- esp_err_t startErr = ledc_fade_start(channel->mode, channel->channel, wait);
- if(startErr != ESP_OK)
- return luaL_error (L, "start fade failed, code %d", startErr);
- return 1;
- }
- static int lledc_set_fade_with_step( lua_State *L ) {
- ledc_channel * channel = (ledc_channel*)luaL_checkudata(L, 1, "ledc.channel");
- int stack = 1;
- int targetDuty = luaL_checkint (L, ++stack);
- int scale = luaL_checkint (L, ++stack);
- int cycleNum = luaL_checkint (L, ++stack);
- int wait = luaL_optint (L, ++stack, LEDC_FADE_NO_WAIT);
- luaL_argcheck(L, wait == LEDC_FADE_NO_WAIT || wait == LEDC_FADE_WAIT_DONE, stack, "Invalid wait");
- ledc_fade_func_install(0);
- esp_err_t fadeErr = ledc_set_fade_with_step(channel->mode, channel->channel, targetDuty, scale, cycleNum);
- if(fadeErr != ESP_OK)
- return luaL_error (L, "set fade failed, code %d", fadeErr);
- esp_err_t startErr = ledc_fade_start(channel->mode, channel->channel, wait);
- if(startErr != ESP_OK)
- return luaL_error (L, "start fade failed, code %d", startErr);
- return 1;
- }
- static int lledc_set_fade( lua_State *L ) {
- ledc_channel * channel = (ledc_channel*)luaL_checkudata(L, 1, "ledc.channel");
- int stack = 1;
- int duty = luaL_checkint (L, ++stack);
- int direction = luaL_checkint (L, ++stack);
- luaL_argcheck(L, direction == LEDC_DUTY_DIR_DECREASE || direction == LEDC_DUTY_DIR_INCREASE, stack, "Invalid direction");
- int scale = luaL_checkint (L, ++stack);
- int cycleNum = luaL_checkint (L, ++stack);
- int stepNum = luaL_checkint (L, ++stack);;
- int wait = luaL_optint (L, ++stack, LEDC_FADE_NO_WAIT);
- luaL_argcheck(L, wait == LEDC_FADE_NO_WAIT || wait == LEDC_FADE_WAIT_DONE, stack, "Invalid wait");
- ledc_fade_func_install(0);
- esp_err_t fadeErr = ledc_set_fade(channel->mode, channel->channel, duty, direction, stepNum, cycleNum, scale);
- if(fadeErr != ESP_OK)
- return luaL_error (L, "set fade failed, code %d", fadeErr);
- esp_err_t startErr = ledc_fade_start(channel->mode, channel->channel, wait);
- if(startErr != ESP_OK)
- return luaL_error (L, "start fade failed, code %d", startErr);
- return 1;
- }
- // Module function map
- static const LUA_REG_TYPE ledc_channel_map[] =
- {
- { LSTRKEY( "getduty" ), LFUNCVAL( lledc_get_duty ) },
- { LSTRKEY( "setduty" ), LFUNCVAL( lledc_set_duty ) },
- { LSTRKEY( "getfreq" ), LFUNCVAL( lledc_get_freq ) },
- { LSTRKEY( "setfreq" ), LFUNCVAL( lledc_set_freq ) },
- { LSTRKEY( "stop" ), LFUNCVAL( lledc_stop ) },
- { LSTRKEY( "reset" ), LFUNCVAL( lledc_timer_rst ) },
- { LSTRKEY( "pause" ), LFUNCVAL( lledc_timer_pause ) },
- { LSTRKEY( "resume" ), LFUNCVAL( lledc_timer_resume ) },
- { LSTRKEY( "fadewithtime" ), LFUNCVAL( lledc_set_fade_with_time ) },
- { LSTRKEY( "fadewithstep" ), LFUNCVAL( lledc_set_fade_with_step ) },
- { LSTRKEY( "fade" ), LFUNCVAL( lledc_set_fade ) },
- { LSTRKEY( "__index" ), LROVAL( ledc_channel_map )},
- { LNILKEY, LNILVAL }
- };
- static const LUA_REG_TYPE ledc_map[] =
- {
- { LSTRKEY( "newChannel" ), LFUNCVAL( lledc_new_channel ) },
- { LSTRKEY( "HIGH_SPEED"), LNUMVAL( LEDC_HIGH_SPEED_MODE ) },
- { LSTRKEY( "LOW_SPEED"), LNUMVAL( LEDC_LOW_SPEED_MODE ) },
- { LSTRKEY( "TIMER_0"), LNUMVAL( LEDC_TIMER_0 ) },
- { LSTRKEY( "TIMER_1"), LNUMVAL( LEDC_TIMER_1 ) },
- { LSTRKEY( "TIMER_2"), LNUMVAL( LEDC_TIMER_2 ) },
- { LSTRKEY( "TIMER_10_BIT"), LNUMVAL( LEDC_TIMER_10_BIT ) },
- { LSTRKEY( "TIMER_11_BIT"), LNUMVAL( LEDC_TIMER_11_BIT ) },
- { LSTRKEY( "TIMER_12_BIT"), LNUMVAL( LEDC_TIMER_12_BIT ) },
- { LSTRKEY( "TIMER_13_BIT"), LNUMVAL( LEDC_TIMER_13_BIT ) },
- { LSTRKEY( "TIMER_14_BIT"), LNUMVAL( LEDC_TIMER_14_BIT ) },
- { LSTRKEY( "TIMER_15_BIT"), LNUMVAL( LEDC_TIMER_15_BIT ) },
- { LSTRKEY( "CHANNEL_0"), LNUMVAL( LEDC_CHANNEL_0 ) },
- { LSTRKEY( "CHANNEL_1"), LNUMVAL( LEDC_CHANNEL_1 ) },
- { LSTRKEY( "CHANNEL_2"), LNUMVAL( LEDC_CHANNEL_2 ) },
- { LSTRKEY( "CHANNEL_3"), LNUMVAL( LEDC_CHANNEL_3 ) },
- { LSTRKEY( "CHANNEL_4"), LNUMVAL( LEDC_CHANNEL_4 ) },
- { LSTRKEY( "CHANNEL_5"), LNUMVAL( LEDC_CHANNEL_5 ) },
- { LSTRKEY( "CHANNEL_6"), LNUMVAL( LEDC_CHANNEL_6 ) },
- { LSTRKEY( "CHANNEL_7"), LNUMVAL( LEDC_CHANNEL_7 ) },
- { LSTRKEY( "IDLE_LOW"), LNUMVAL( 0 ) },
- { LSTRKEY( "IDLE_HIGH"), LNUMVAL( 1 ) },
- { LSTRKEY( "FADE_NO_WAIT"), LNUMVAL( LEDC_FADE_NO_WAIT ) },
- { LSTRKEY( "FADE_WAIT_DONE"), LNUMVAL( LEDC_FADE_WAIT_DONE ) },
- { LSTRKEY( "FADE_DECREASE"), LNUMVAL( LEDC_DUTY_DIR_DECREASE ) },
- { LSTRKEY( "FADE_INCREASE"), LNUMVAL( LEDC_DUTY_DIR_INCREASE ) },
- { LNILKEY, LNILVAL }
- };
- int luaopen_ledc(lua_State *L) {
- luaL_rometatable(L, "ledc.channel", (void *)ledc_channel_map); // create metatable for ledc.channel
- return 0;
- }
- NODEMCU_MODULE(LEDC, "ledc", ledc_map, luaopen_ledc);
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