Hello!
I am trying to make a basic filter for ADC measurements. The idea is provide the average of previous 1000 samples as an output. To store the samples I have used a circular buffer with 1000 elements. When a new element is added the last element is removed; this way I always have stored last 1000 ADC samples so I can easily get the average.
The problems is that I will have to store samples for multiple ADC channnels. For 10 ADc channels would be 10 * 1000 samples/channel = 10k samples stored in memory at any moment of time.
I have made my program and it works only when I initialize buffers with only 10 samples (or less) per channel. When I use a bigger number of samples the program is just failing to start. I suspect that I am running out of memory.
Initial memory configuration was:
HEAP_SIZE = DEFINED(__heap_size__) ? __heap_size__ : 0x00000100;
STACK_SIZE = DEFINED(__stack_size__) ? __stack_size__ : 0x00000100;
/* Specify the memory areas */
MEMORY
{
m_interrupts (RX) : ORIGIN = 0x00000000, LENGTH = 0x00000100
m_flash_config (RX) : ORIGIN = 0x00000400, LENGTH = 0x00000010
m_text (RX) : ORIGIN = 0x00000410, LENGTH = 0x0000FBF0
m_data (RW) : ORIGIN = 0x1FFFFC00, LENGTH = 0x00010000
}
And I have tried to change into something like this:
HEAP_SIZE = DEFINED(__heap_size__) ? __heap_size__ : 0x0000FFFF;
STACK_SIZE = DEFINED(__stack_size__) ? __stack_size__ : 0x00000200;
/* Specify the memory areas */
MEMORY
{
m_interrupts (RX) : ORIGIN = 0x00000000, LENGTH = 0x00000100
m_flash_config (RX) : ORIGIN = 0x00000400, LENGTH = 0x00000010
m_text (RX) : ORIGIN = 0x00000410, LENGTH = 0x0000FBF0
m_data (RW) : ORIGIN = 0x1FFFFC00, LENGTH = 0x0001FFFF
But with this configuration it won't work even with 10 samples/channel.
And the thing is that the project is also using functions like printf() which requires a pretty high amount of memory.
The question is: How do I increase memory to it's maximum limits?
Microcontroller used: Kinetis SKEAZN642
I have also attached the project in case it helps.
