pwm freqq (#1203)

src/cmnds/cmd_main.c

@@ -639,6 +639,24 @@ commandResult_t CMD_FindPattern(const void *context, const char *cmd, const char
 	return CMD_RES_OK;
 }*/
 
+#define PWM_FREQUENCY_DEFAULT 1000 //Default Frequency
+
+int g_pwmFrequency = PWM_FREQUENCY_DEFAULT;
+
+commandResult_t CMD_PWMHz(const void* context, const char* cmd, const char* args, int cmdFlags) {
+
+	Tokenizer_TokenizeString(args, TOKENIZER_ALLOW_QUOTES | TOKENIZER_DONT_EXPAND);
+	// following check must be done after 'Tokenizer_TokenizeString',
+	// so we know arguments count in Tokenizer. 'cmd' argument is
+	// only for warning display
+	if (Tokenizer_CheckArgsCountAndPrintWarning(cmd, 1))
+	{
+		return CMD_RES_NOT_ENOUGH_ARGUMENTS;
+	}
+
+	g_pwmFrequency = Tokenizer_GetArgInteger(0);
+	return CMD_RES_OK;
+}
 commandResult_t CMD_DeepSleep_SetEdge(const void* context, const char* cmd, const char* args, int cmdFlags) {
 
 	Tokenizer_TokenizeString(args, TOKENIZER_ALLOW_QUOTES | TOKENIZER_DONT_EXPAND);
@@ -797,6 +815,8 @@ void CMD_Init_Early() {
 
 	CMD_RegisterCommand("TimeSize", CMD_TimeSize, NULL);
 
+	CMD_RegisterCommand("PWMHz", CMD_PWMHz, NULL);
+
 #if (defined WINDOWS) || (defined PLATFORM_BEKEN) || (defined PLATFORM_BL602)
 	CMD_InitScripting();
 #endif

src/hal/bk7231/hal_pins_bk7231.c

@@ -14,9 +14,8 @@
 
 //100hz to 20000hz according to tuya code
 #define PWM_FREQUENCY_SLOW 600 //Slow frequency for LED Drivers requiring slower PWM Freq
-#define PWM_FREQUENCY_DEFAULT 1000 //Default Frequency
 
-int pwmfrequency = PWM_FREQUENCY_DEFAULT;
+extern int g_pwmFrequency;
 
 int PIN_GetPWMIndexForPinIndex(int pin) {
 	if(pin == 6)
@@ -102,17 +101,20 @@ void HAL_PIN_PWM_Stop(int index) {
 
 void HAL_PIN_PWM_Start(int index) {
 	int pwmIndex;
+	int useFreq;
 
 	pwmIndex = PIN_GetPWMIndexForPinIndex(index);
 
 	// is this pin capable of PWM?
 	if(pwmIndex == -1) {
 		return;
 	}
+	useFreq = g_pwmFrequency;
 	//Use slow pwm if user has set checkbox in webif
-	if(CFG_HasFlag(OBK_FLAG_SLOW_PWM)) pwmfrequency = PWM_FREQUENCY_SLOW; 
+	if(CFG_HasFlag(OBK_FLAG_SLOW_PWM))
+		useFreq = PWM_FREQUENCY_SLOW;
 
-	uint32_t frequency = (26000000 / pwmfrequency);
+	uint32_t frequency = (26000000 / useFreq);
 #if PLATFORM_BK7231N
 	// OSStatus bk_pwm_initialize(bk_pwm_t pwm, uint32_t frequency, uint32_t duty_cycle);
 	bk_pwm_initialize(pwmIndex, frequency, 0, 0, 0);
@@ -136,7 +138,7 @@ void HAL_PIN_PWM_Update(int index, float value) {
 		value = 100;
 
 	//uint32_t value_upscaled = value * 10.0f; //Duty cycle 0...100 -> 0...1000
-	uint32_t period = (26000000 / pwmfrequency); //TODO: Move to global variable and set in init func so it does not have to be recalculated every time...
+	uint32_t period = (26000000 / g_pwmFrequency); //TODO: Move to global variable and set in init func so it does not have to be recalculated every time...
 	uint32_t duty = (value / 100.0 * period); //No need to use upscaled variable
 #if PLATFORM_BK7231N
 	bk_pwm_update_param(pwmIndex, period, duty,0,0);