Hello to everyone. I write code for NRF24LE1 using KEIL and rtx tiny. But i have some problems.
When i power on my device, programm don't run correctly, but when hard reset everythink works good.
right down is my init task "first task of my programm" thanks.
void init (void) _task_ INIT { // Wait for XOSC to start to ensure proper UART baudrate while(hal_clk_get_16m_source() != HAL_CLK_XOSC16M) {} os_wait (K_TMO, 100, 0); /* wait for timeout: 100 ticks ~ 1sec */ os_wait (K_TMO, 100, 0); /* wait for timeout: 100 ticks ~ 1sec */ os_wait (K_TMO, 100, 0); /* wait for timeout: 100 ticks ~ 1sec */ gpio_pin_dir_output(GPIO_PIN_ID_P1_1, GPIO_PIN_CONFIG_OPTION_PIN_MODE_OUTPUT_BUFFER_NORMAL_DRIVE_STRENGTH);//pin1_1 output for IGT os_create_task (SERIAL); os_create_task (GSM); os_delete_task (INIT); /* kill task init */ while (1) { } }
what do you have on the reset pin? i know what you are thinking. you are not right.
My reset pin is on air (when i want to reset my device i connected with ground)
I do not know your chip, but, at least, you do not have the error prone $#!^ RC there.
what is on the pin on onew f the manufacturers devboards?
Some chips will support an unconnected reset pin.
A number of chips will not.
An RC reset does "work", if it's allowed that the reset will fail when there are short glitches in the supply power - the RC only does the correct thing when there is enough time without power that the capacitor starts from (mostly) empty. So with a RC solution, it's common that the processor locks up after a short power glitch. That's why it's so common to recommend people to disconnect the power, slowly count to 10 and then reconnect the power, hopefully giving the capacitor enough time to discharge before power is applied again.
Best is to have a dedicated supervisor chip. They will work both for short glitches in the supply power and when the power is away for a longer time. And they can reset the chip when the voltage is too low.
a small divergence if your uC does not have internal reset circuitry it is best is to have a dedicated supervisor chip. They will work both for short glitches in the supply power and when the power is away for a longer time. And they can reset the chip when the voltage is too low.