questions about main_m4.cpp

[wj zhang]

now, i have two problems need your help to solve as follows:

source code:   \pixy-master\src\device\main_m4\src\main_m4.cpp, download from  https://github.com/charmedlabs/pixy/tree/master  

loaction: the last function in main(), which is exec_loop()

1、exec_select(),   g_bMachine->selectProgram(progs, &g_program); (bool ButtonMachine::selectProgram(uint8_t progs, uint8_t *selectedProg) ), for this line code its function is that select button state machine, i understand the function is set signature (1 to  7 color) with button, am i right?

2、next while(1), it have 5 states(0、1、2,、3、4)，could you tell me how to shift in this 5 states, and execute corresponding loop of (*g_progTable[g_program]->loop)()?