Include dependency graph for adc.c:
Functions | |
| void | ADC_IRQHandler (void) |
| void | adc0_init () |
| uint16_t | adc0_get_reading (uint8_t channel_num) |
Variables | |
| QueueHandle_t | g_adc_result_queue = 0 |
| SemaphoreHandle_t | g_adc_mutex = 0 |
| This is the mutex such that only one ADC conversion is performed at a time. More... | |
Function Documentation
| uint16_t adc0_get_reading | ( | uint8_t | channel_num | ) |
Gets an ADC reading from a channel number between 0 - 7
- Returns
- 12-bit ADC value read from the ADC.
- Note
- If FreeRTOS is running, adc conversion will use interrupts and not poll for the result.
| void adc0_init | ( | void | ) |
Initializes the ADC Peripheral
- Note
- The PIN that will be used by ADC needs to be selected using PINSEL externally
| void ADC_IRQHandler | ( | void | ) |
This is the ADC interrupt mapped to startup.cpp IRQ name. This is called by the CPU core when ADC interrupt occurs.
Variable Documentation
| SemaphoreHandle_t g_adc_mutex = 0 |
This is the mutex such that only one ADC conversion is performed at a time.
| QueueHandle_t g_adc_result_queue = 0 |
Once a conversion is complete, we put the result into a queue. This avoids polling as the conversion routine can just wait until the ISR inputs the value into the queue.
