djsundog/circuitpython
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Moved pin wait to an initial exec

Browse Source
This commit is contained in:
DavePutz 2021-03-09 16:37:29 -06:00 committed by GitHub
parent f0e3274a33
commit 0c58cc4772
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 17 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

33
ports/raspberrypi/common-hal/pulseio/PulseIn.c
View File

@ -46,13 +46,12 @@ volatile uint16_t result = 0;
volatile uint16_t buf_index = 0;
uint16_t pulsein_program[] = {
0x2020, // 0: wait 0 pin, 0
0xe03f, // 1: set x, 31
0x4001, // 2: in pins, 1
0x0042, // 3: jmp x--, 2
0x8060, // 4: push iffull block
0xc020, // 5: irq wait 0
0x0001, // 6: jmp 1
0xe03f, // 0: set x, 31
0x4001, // 1: in pins, 1
0x0041, // 2: jmp x--, 2
0x8060, // 3: push iffull block
0xc020, // 4: irq wait 0
0x0000, // 5: jmp 1
};
void common_hal_pulseio_pulsein_construct(pulseio_pulsein_obj_t* self,
@ -68,10 +67,6 @@ void common_hal_pulseio_pulsein_construct(pulseio_pulsein_obj_t* self,
self->start = 0;
self->len = 0;
save_self = self;
// change initial state machine wait if idle_state is false
if (idle_state == false) {
pulsein_program[0] = 0x20a0;
}
// Set everything up.
rp2pio_statemachine_obj_t state_machine;
@ -91,6 +86,7 @@ void common_hal_pulseio_pulsein_construct(pulseio_pulsein_obj_t* self,
false,
true, 32, true, // RX auto-push every 32 bits
false); // claim pins
pio_sm_set_enabled(state_machine.pio,state_machine.state_machine, false);
self->state_machine.pio = state_machine.pio;
self->state_machine.state_machine = state_machine.state_machine;
self->state_machine.sm_config = state_machine.sm_config;
@ -107,15 +103,20 @@ void common_hal_pulseio_pulsein_construct(pulseio_pulsein_obj_t* self,
buf_index = 0;
pio_sm_set_in_pins(state_machine.pio,state_machine.state_machine,pin->number);
pio_sm_set_enabled(state_machine.pio,state_machine.state_machine, false);
irq_set_exclusive_handler(self->pio_interrupt, common_hal_pulseio_pulsein_interrupt);
hw_clear_bits(&state_machine.pio->inte0, 1u << state_machine.state_machine);
hw_set_bits(&state_machine.pio->inte0, 1u << (state_machine.state_machine+8));
// exec a set pindirs to 0 for input
pio_sm_exec(state_machine.pio,state_machine.state_machine,0xe080);
irq_set_enabled(self->pio_interrupt, true);
//exec the appropriate wait for pin
if (self->idle_state == true ) {
pio_sm_exec(self->state_machine.pio,self->state_machine.state_machine,0x2020);
} else {
pio_sm_exec(self->state_machine.pio,self->state_machine.state_machine,0x20a0);
}
pio_sm_set_enabled(state_machine.pio, state_machine.state_machine, true);
irq_set_enabled(self->pio_interrupt, true);
}
bool common_hal_pulseio_pulsein_deinited(pulseio_pulsein_obj_t* self) {
@ -177,9 +178,9 @@ void common_hal_pulseio_pulsein_resume(pulseio_pulsein_obj_t* self,
uint16_t trigger_duration) {
// exec a wait for the selected pin to change state
if (self->idle_state == true ) {
pio_sm_exec(self->state_machine.pio,self->state_machine.state_machine,0x20a0);
} else {
pio_sm_exec(self->state_machine.pio,self->state_machine.state_machine,0x2020);
} else {
pio_sm_exec(self->state_machine.pio,self->state_machine.state_machine,0x20a0);
}
// Send the trigger pulse.
if (trigger_duration > 0) {
@ -191,7 +192,7 @@ void common_hal_pulseio_pulsein_resume(pulseio_pulsein_obj_t* self,
}
// Reconfigure the pin for PIO
common_hal_mcu_delay_us(100);
common_hal_mcu_delay_us(200);
gpio_set_function(self->pin, GPIO_FUNC_PIO0);
pio_sm_set_enabled(self->state_machine.pio, self->state_machine.state_machine, true);
}