Super-loop and motivation for a sequencer

Before we get into the design and implementation of a sequencer, we will first analyze the limitations of a super loop. In a usual super-loop scenario, we check flags that are set from an ISR. Below is an example pseudocode of a super loop:

bool data_read_ready = false;
bool data_send_timeout = false;
int main() {
    // initialize hardware
   
    while(1) {
        if(data_read_ready) {
            sensor_data_read_and_buffer();
            data_read_ready = false;
        }
        if(data_send_timeout) {
            data_send_from_buffer();
            data_send_timeout = false;
        }
        if(!data_read_ready && !data_send_timeout) {
            enter_sleep();
        }
    }
}

In the preceding pseudocode, we perform the following steps:

1. Check the Boolean flag data_read_ready and, if it is set, we execute the function sensor_data_read_and_buffer. We then reset the data_read_ready flag.
2. Check the...